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IPC classes for russian patent Power-driven tool (RU 2545171):
                         
 Electric drive for vertical movement of control element / 2533177
Electric drive comprises a toothed stator with evenly spaced teeth and multiphase winding that includes two parallel branches in each phase with outputs to be connected to the source of alternating current or voltage. At the toothed rotor shaft placed inside the stator there is magnetoelectric inductor with the toothed magnet core forming poles with alternating polarity in circumferential direction, and number of its teeth is equal to number of the rotor teeth. The inductor is installed at the shaft so that teeth of its magnet core are shifted in regard to the rotor teeth per an angle that does not exceed one fourth of polar pitch in direction of weight moment action from the control element.
 Fastening structure for engine assembly / 2532772
Fastening structure for an engine assembly (10), providing for attachment of the engine assembly (10), comprising a commutator motor and a brush-holding unit (20), which holds the brushes in a movable sliding contact with a commutator of the commutator motor, to a tubular body (1) of a mechanical tool, comprises a seat (5), having a bottom made in a body (1), the design of which makes it possible to install the engine assembly (10) in it with the brush-holding unit (20), facing downwards. A receiving section (6) is made in the seat (5), the design of which is intended for positioning of the brush-holding unit (20) as it engages with it. A thrust section (26) is arranged on a stator (11) of the commutator motor and/or on the brush-holding unit (20) and is designed for engagement with the appropriate brush-holding unit (20) or the stator (11), adjoining it in the assembly for provision of relative positioning of the stator (11) and the brush-holding unit (20). A fastening element (8, 9) is inserted at the open side of the body (1) for engagement with the stator (11) and fixation to the body (1). Besides, the engine assembly (10) inside the seat (5) so that the brush-holding unit (20) is in contact with the receiving section (6), and the stator (11) and the brush-holding unit (20) contact with each other via the thrust section (26). At the same time the engine assembly (10) is placed and fixed between a fastening element (8, 9) and the receiving section (6) with the help of the fastening element (8, 9).
 Electric spindle / 2528420
Electric spindle is distinguished for the fact that in the casing cavity there installed are cylindrical bushings coaxially to the stator core cavity, the bushings are made from insulation material, for example, glass fibre plastic, and are coupled by their ends with the ends of the stator core. At least two radial bearings and one thrust magnetic bearing are installed in the end brackets of the electric spindle. Rotor ends are rigidly coupled with the end covers, contacting surfaces of the end shields and cylindrical bushings are fitted by seals. A bearing unit is made so as to be able of magnetic support of the rotor, for this purpose each end cover of the rotor is made from nonmagnetic material and fitted by an annular protrusion turned to the respective end shield made from nonmagnetic material, compound permanent magnets are rigidly fixed one after the other on the inner surface of the annular protrusion. The end shields are equipped by ring-shaped protrusions with at least three annular permanent magnets being rigidly fixed on their outer surface. Additionally, the electric spindle is equipped with an axial magnetic bearing.
 Propulsor assy with motor and its aerodynamic propulsor / 2525838
Invention relates to thrust generators and can be used in aircraft. Proposed assy incorporates motor with parallel stator parts and disc-type rotor with internal arrangement of torque transfer joint. Every base of motor stator and disc-type rotor consists of the joint of radial and chord elements. Disc-type rotor supports vertical elements secured at radial element inner ends whereat sealed protective guard and aerodynamic propulsor are secured. Assemblies of windings and electric power feed circuits, protective sealed guard, air feed and discharge openings are arranged at stator base chord element outer surface to cool down motor stator and rotor inner parts. It can comprises two or more identical motors wherein bases of rotors are integrated in a single gear by adapters while stators are coaxially jointed by adjacent bases.
 Borehole electrically driven pump / 2517641
Invention relates to borehole pumps. Borehole pump 200 comprises first and second case elements, gear pump, motor stator 222 and multiple permanent magnets. First case element comprises first recess with first flat surface 246 surrounded by first wall 248. Second case element is secured to first case element and comprises second recess with second flat surface 256 surrounded by second wall 258 shifted from surface 246 parallel therewith. Gear pump comprises inner rotor 266 and outer rotor 242. Stator 222 is arranged in the seat made in second case element. Magnets are fitted to revolve along with rotor 242 nearby stator 222. Every rotor 242 and 266 has opposite side arranged nearby surfaces 246 and 256. Rotor 242 is located nearby surfaces 246 and 256. Rotor 242 is located between first and second recesses and levelled at rotational axle by means of walls 248 and 258. Shaft 268 engages with every firs and second case elements confining the rotational axle of rotor 266 shifted from that of rotor 242.
 Hand-held machine with brush commutated electric motor / 2506683
Invention relates to the field of electric engineering, in particular, to hand-held electric machines. The claimed hand-held electric machine (10) has elongated motor housing (16) serving as a handle with commutator motor (50) placed in it; at that electric motor brush (39) are spring-actuated in brush-carrier (28) with box (38). Brush-carrier (28) is fixed independently/separately in motor housing (16) to which set of coordinate axes is related; first of all, longitudinal axis (18), vertical (20) and transversal (22) ones. At that according to the invention box (38) of the brush-holder (28) is offset from vertical axis (20) of the motor housing (16) per an angle of about 20°, and it is oriented primarily in relation to longitudinal axis (18).
 Electric motor with adjustment device / 2498482
Electric device consists of housing (66), motor unit (12) with motor body (14) and adjustment unit (16) purposed for location of at least one driving element. According to the invention at that motor unit (12) is connected to adjustment unit (16) by yoke (20) made as mandrel-type or socket-type part covering the motor unit (12) and it is purposed for motor unit (12) fixing at adjustment unit (16).
 Engine for transport vehicle / 2491699
Engine contains a fan (30) fixed at the rotor shaft (10) supplying outdoor air to the engine and a locking device (20) which functions as a positioning element for the fan (30) in axial direction; the locking device is fixed between the bearing (50) that supports the rotor shaft (10) and the fan (30) inserted at one end of the rotor shaft (10). The locking device (20) has a surface opposite to the fan so that it is coincident with the fan and the fan (30) is fixed by a fixing element which is input in direction towards the locking device (20), in essence in parallel to the rotor shaft (10). At that the fan (30) has coefficient of expansion set by majority of linear expansion coefficients for the rotor shaft (10) and locking device (20).
 Electric spindle / 2479095
Electric spindle comprises a body, in the cavity of which there is a laminated stator core, equipped with semi-closed slots, in which there are winding coils placed, besides, in the cylindrical cavity of the stator there is a rotor installed as capable of rotation, and its bearing unit is arranged as capable of gas-dynamic support, at the same time the electric spindle is equipped with a clamp for fixation of a working tool. At the same time, according to this invention, conductors of the winding of each stator slot are fixed with a wedge and a key insert contacting with it from insulating material, the cross section of which is made as capable of fixation of the key insert back under the slot wedge, and the ledge section complies with the slot splint section, besides, the profile of the key insert ledge surface corresponds to the surface of the cylindrical cavity of the stator core, the surface of the key insert back along its entire length is equipped with a longitudinal chute, which is open into an inner cavity of the spindle body arranged as capable of supplying air into it, in the cavity of the electric spindle body there are cylindrical bushings placed, the diameter of the cavity of which is equal to the diameter of the cylindrical cavity of the stator core, and between the ends of the stator core and the ends of cylindrical bushings facing them there are support rings installed, the cavity of which exceeds the diameter of the cylindrical cavity of the stator core, equipped with a collar that covers a part of the outer surface of bushings, the specified thrust rings are made of non-magnet material and are fixed with the stator core, and the cylindrical bushings are installed as capable of radial displacement relative to the longitudinal axis of the cylindrical cavity of the stator core, for this purpose contacts of bushings with the body, the end shield and collars of thrust rings are equipped with sealing rings arranged as capable of elastic deformation radially and along the longitudinal axis of the stator core. The rotor is made with inner cavities, for this purpose it comprises coaxial hollow shaft and shell, which are rigidly connected to each other, at least by three links equidistant from each other and made in the form of plates of identical thickness, being aligned radially to the longitudinal axis of the rotor, the ends of the rotor are rigidly fixed to the end covers, for instance, by vacuum-diffusion welding, besides, one of end covers of the rotor is arranged as thickened and is equipped with a clamp for fixation of a working tool.
 Electric fan set with improved cooling / 2453967
Invention relates to electric engineering, namely - to electric machines, and deals with the specific features of fixing elements design for electric motors, particularly, fan sets intended for heating, ventilation and/or air-conditioning plants. This invention proposes a device (40) for fixing electric motor (16) containing accommodating seat (41) for motor installation with a wall (42). According to the invention, the device (40) for fixing electric motor (16) implemented so that the first (18A) and second (18B) air pumping element can be rotated. The air pumping element includes accommodating seat (41) to install electric motor (16) and a wall (42). Besides, the obstructing elements (60, 62; 72, 74, 76; 80) are placed between the electric motor (16) and accommodating seat (41) wall (42). The obstructing elements are implemented so that they can obstruct air flowing between electric motor (16) and wall (42) of accommodating seat and air flow be redirected through electric motor (16).
 Combined winding of induction machine for 2p=4, z=36 / 2538266
Combined winding of the induction machine with number of pole pairs 2p=4 and number of slots z=36 for number of parallel branches a=1 or 2 is made with pitch y=1-10 and contains 12 coils. Number of turns m"з" of odd coils and number of turns m"тр" of even coils comply with ratio
 Winding design, rotating electrical machine and method for manufacturing of rotating electrical machine / 2533163
Winding design for a rotating electrical machine includes the core with slots and a coil comprising the first and second windings combined by their intercrossing. Each straight section of the coil is inserted to one of two slots made with the preset interval so that the core is assembled at the core.
 Integrated winding of synchronous machine for 2p=2, z=18 / 2528179
Invention enables to produce energy-efficient electrical machines, particularly high-performance, high-torque low-noise asynchronous motors. The disclosed integrated winding of an asynchronous machine with the number of pairs of poles 2p=2, with the number of grooves z=18 for the number of parallel braches a=1 is made with spacing y=1-10 and 6 has coils, wherein the number m"з" of turns of odd coils and the number m"тр" of turns of even coils satisfies the relationship
 Stator of rotating electric machine with constant excitation / 2516246
In the middle of the first coil group (10a) there is a middle tooth (8a), which has the first MB width of the middle tooth. A stator (5) has the second group (10b) of coils. The first and second groups of coils are placed in the circumferential direction (U), directly in sequence one after another. Between the first and second groups of coils there is the first edge tooth (9), which has the first RB width of the edge tooth. In essence the first RB width of the edge tooth is equal to RB=a·ZB, and the first MB width of the middle tooth is equal to MB=(2-a)·ZB. The coefficient a is bigger than 0 and less than 1.
 Rectifying free-running asynchronous generator / 2516217
Invention is related to the sphere of electric equipment and may be used for production of rectifying asynchronous generators of stand-alone power plants. Technical result is attained by the reason that in a rectifying free-running asynchronous generator with capacitor excitation and a stator winding made of six coil group having outputs, according to this invention, the first output of the winding is taken from the united end of the fourth and beginning of the first coil groups, the second output of the winding is taken from the united end of the first and beginning of the second coil groups, the third output is taken from united end of the sixth and beginning of the third coil groups, the fourth output is taken from the united end of third and beginning of the fourth coil groups, the fifth output is taken from the united second and beginning of the fifth coil groups, the sixth output is taken from the united end of the fifth and beginning of the sixth coil groups, in parallel to the above stator windings there are six in-series delta connected excitation capacitors, which can connect these capacitors and outputs of the second, fourth and sixth capacitors as per the wye-wye connection scheme and the load is connected to these outputs in compliance with the voltage value and phase number matching the required load.
 Multifunctional free-running asynchronous generator / 2516013
Invention is related to the sphere of electric equipment and may be used for production of asynchronous generators of stand-alone power plants. Technical result is attained by the reason that in a multifunctional free-running asynchronous generator with capacitor excitation and a stator winding made of six coil group having outputs the first output of the winding is taken from the united end of the fourth and beginning of the first coil groups, the second output of the winding is taken from the united end of the first and beginning of the second coil groups, the third output is taken from united end of the sixth and beginning of the third coil groups, the fourth output is taken from the united end of third and beginning of the fourth coil groups, the fifth output is taken from the united end of the second and beginning of the fifth coil groups, the sixth output is taken from the united end of the fifth and beginning of the sixth coil groups, in parallel to the above stator windings there are six in-series delta-connected excitation capacitors, which can connect these capacitors and outputs of the second, fourth and sixth capacitors as per the wye-wye connection scheme and the load is connected to these outputs in compliance with the voltage value and phase number matching the required load.
 Asynchronous generator with eight-pole stator winding / 2516012
Invention is related to the sphere of electric equipment and may be used in asynchronous generators of stand-alone power plants. One part of a phase winding with a large vector sum of load and exciting currents is made with a heavy-gage wire, while the other part of the phase winding with a less vector sum of load and exciting currents is made with a wire of the lesser gage. In the suggested asynchronous generator with the eight-pole stator winding out of twenty four coil groups (from the first up to the twenty fourth) and excitation capacitors, according to the invention, the first output is taken from the united beginning of the first coil group and ending of the sixth one, the second output is taken from the united end of the second coil group and beginning of the third one, the third output is taken from the united end of the fourth coil group and beginning of the fifth one, the fourth output is taken from the united end of the nineteenth coil group and beginning of the twentieth coil group, the fifth output is taken from the united end of the twenty first coil group and beginning of the twenty second coil group, the sixth output is taken from the united end of the twenty third coil group and beginning of the twenty fourth coil group; at that the end of the first coil group is connected to the beginning of the seventh coil group, the beginning of the second group is connected to the end of the eighth group, the end of the third coil group is connected to the beginning of the ninth group, the beginning of the fourth group is connected to the end of the tenth group, the end of the fifth coil group is connected to the beginning of the eleventh group, the beginning of the sixth group is connected to the end of the twelfth group, the end of the seventh coil group is connected to the beginning of the thirteenth group, the beginning of the eighth group is connected to the end of the fourteenth group, the end of the ninth coil group is connected to the beginning of the fifteenth group, the beginning of the tenth group is connected to the end of the sixteenth group, the end of the eleventh coil group is connected to the beginning of the seventeenth coil group, the beginning of the twelfth group is connected to the end of the eighteenth group , the end of the thirteenth coil group is connected to the beginning of the nineteenth coil group, the beginning of the fourteenth group is connected to the end of the twentieth group, the end of the fifteenth coil group is connected to the beginning of the twenty first coil group, the beginning of the sixteenth group is connected to the end of the twenty second group, the end of the seventeenth coil group is connected to the beginning of the twenty third coil group, the beginning of the eighteenth group is connected to the end of the twenty fourth group, at that the excitation capacitors are connected to the first, second and third outputs and the generator load is connected to the fourth, fifth and sixth outputs.
 Winding of electric machine / 2509402
Front links for connection of turn groups are arranged above the end surface of the tooth area of the core with that part of the slots, where the winding layer is available, rods of which they connect, places of connections of turn front links with rods of that layer of winding, above which there are front links for connection of turn groups, arranged at the side of centres of the core slots. Places of connections of at least most other front links with the rods of the upper layer of the winding are arranged at the side of the tooth surface of the core, and places of connections of these front links with rods of the lower layer of the winding are arranged at the side of the core back.
 Winding of stator of three-phase alternating-current electric machines / 2508593
Stator winding includes three single-phase windings formed with equal number of coils arranged in slots. Coils are connected to each other as per equal schemed providing spatial displacement of axes of windings through 120 degrees. Each of the single-phase windings throughout double pole division of the stator is formed with 2Z/2pm coils that include Z/2pm groups with similar number of coils in groups. Each of the groups of coils has different width of coils included into it and different number of turns forming coils in comparison to other groups of coils. Besides, coils of one of the groups have minimum width with minimum number of turns. Width and number of coil turns of every next group have different width and number of coil turns of the previous group. Coils with larger width and larger number of turns are arranged concentrically relative to coils with minimum width and minimum number of turns. Some parts of the volume of slots, which remain free after laying of coils of this single-phase windings, are used for arrangement of coils of two other single-phase windings that are made in a similar way.
 Low noise induction motor / 2507664
Low noise induction motor comprises two mutually dependent combined windings, one of which is assembled as "star", and the second one - as "delta". These windings are laid into slots so that resulting vectors of induction of magnetic flows of pole pairs in identical phases of "star" and "delta" form an angle of 30 el. degrees between each other.
 Direct current inertia motor / 2506684
Invention relates to electric engineering, designing of electric motors with torque amplifiers. Electric motor contains housing with base plate, closed front and rear covers, free shaft end with armature is passed through opening in the front cover. Armature is made as two inertia mechanisms fixed at the shaft are similar in construction and turned towards each other per 180 degrees in horizontal plane and their longitudinal axes are perpendicular to longitudinal axis of the shaft. Each inertia mechanism contains circular housing closed at the front end surface with central opening in that surface. From outside end surface there's fixed gear wheel. Direct-current drive motor is fixed at outer surface of the rear cover with central hole placed in the rear part of the housing. Inside the housing there is epicyclical gearing which input link is connected to the shaft of electric drive motor while its output link is connected to horizontal shaft with crossbar; at four ends of the latter there are gear wheels with balance weights fit freely on axes and engaged with fixed gear wheel. Each next balance weight at crossbar gear wheels is offset in regard to the previous one per 90 degrees. At the armature shaft, at insulating bushing there are two fixed contact rings contacting carbon brushes. Positive leads of both electric drive motors are connected electrically to one contact ring and negative leads connected to the other contact ring.
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FIELD: electricity. SUBSTANCE: invention relates to a power-driven tool equipped with a three-phase brushless electric motor, and more precisely to a control method of an output characteristic of the electric motor of the power-driven tool. The power-driven tool includes a brushless motor that includes a rotor with a constant magnet, a cylindrical stator and three-phase stator windings. Multiple slots are made on the inner surface of the stator at specified intervals in a circumferential direction. Each of the three stator windings is formed with multiple coils wound in the slots of the stator and connected to each other. Total number of coil turns wound in the slots of each phase is the same for three phases and is not divisible by the number of slots of each phase. EFFECT: creation of an easy control method of an output characteristic of a brushless motor in a power-driven tool by control of the number of turns of the coil included in a stator winding. 6 cl, 27 dwg
Background of the invention Area of technology The invention relates to the drive tool is supplied with three-phase brushless motor, and more particularly to a method of controlling the output characteristic of the engine driven applications. Description of the prior art It is known that the stator of the brushless motor has a plurality of grooves provided on an inner peripheral surface on which is mounted a rotor comprising a permanent magnet. The stator winding is formed by winding the coils in the slots and connecting them in series or in parallel. When the current in the circuit of the motor is fed to the coils of the stator winding, around the coils generates a magnetic field, this magnetic field interacts with the field generated by the permanent magnet, and the rotor is driven. Known stator winding includes the same number of turns are wound in the slots, and this number is chosen depending on the desired output characteristics of the engine, the desired torque or speed. If each of the coils forming the stator winding, to choose a different number of turns, the magnetic field generated around each coil during the passage through it of a current drive circuit will vary in strength. The result can be� caused by the torque fluctuation of the engine, hence, this may be a vibration issue. However, on the other hand, the output torque characteristic may not reach the desired level, if all coils have n turns, and to exceed the desired level, if all coils will have n+1 turns. In this regard, in the Japanese utility model publication No. 61-A disclosed method of controlling the number of turns of the coils to control the characteristic of the engine. According to prior art, provided with an auxiliary stator winding of the same phase as that of the main winding, and you can change the number of grooves auxiliary winding or the number of turns of the groove. However, in the prior art auxiliary stator winding is used together with the main winding, which is a disadvantage as it limits the space for winding the main stator winding. Summary of the invention Accordingly, an object of the invention is to provide a method to easily control the output characteristic of the brushless motor in the drive tool by adjusting the number of turns of the coil, which is part of the stator winding. The above task can be accomplished using the claimed invention. According to one feature of the invention, consider the drive tool includes a brushless motor, which includes�et a rotor with a permanent magnet, a cylindrical stator and a three-phase stator winding mounted on the inner periphery of the stator and the rotating rotor, wherein the drive tool performs a given operation by rotating the tip of the tool using a brushless motor. The term "drive tool according to the invention in its broad sense covers electric tools, driven by the engine, such as live tooling for use in impact operations when drilling or screws, as well as drive tools for cutting, grinding or polishing. As for the tool, the inner surface of the stator provided with a plurality of grooves at predetermined intervals in the circumferential direction. Each of the three-phase stator winding is formed by a set of coils wound in the stator slots and interconnected, and the number of turns of the coils forming the stator winding in each phase is regulated to control the output characteristic of the engine. According to the invention, unlike the prior art, for controlling output characteristics of the engine to use the auxiliary stator winding, no additional space required for the installation of the auxiliary winding in the stator, so that we can easily provide warranty�for installation in the stator winding. One of the objects of the invention, the total number of turns of the coils wound in the slots of each phase, preferably may be the same for the three phases and not a multiple of the number of grooves of each phase. For example, in a design with two slots in each phase (in which the stator winding of each phase consists of two coils) they can be preferably positioned in such a way that the total number of turns of the coils in each phase is seven, and one of the two coils in each phase consists of three turns of wire, while the other coil consists of four turns of wire, or one of the two coils in each phase consists of two turns of wire, while the other consists of five turns of wire. According to this structure, the three-phase stator winding consists of coils with the same number of turns, and therefore, when the current in the circuit of the actuator passes through the stator winding, the strength of the magnetic field generated around each of the stator windings, not so easy ranges. According to an additional object of the invention, provided that the total number of turns of the coils wound in the slots of each phase, the same for the three phases and is not a multiple of the number of grooves of each phase, the X-th coil in three phases may include the same number of turns of wire, and, as to the number of turns of one of the coils wound in the slots of each f�SHL, the number of turns of at least one of the other coils may differ by one, and the number of turns of each of the other coils may not differ or differ by one. The term "X-th" coil this invention relates to X-th coil from the beginning of the winding (the starting point of winding through the slots). According to this object, in the above structure, the difference in the number of turns of the coils wound in the slots of each phase can be minimized. Therefore, the imbalance in the number of turns of the coils can be minimized, so that it is possible to implement a balanced regulation of the number of turns of the coils. The result is a rational way to avoid contact between adjacent coils wound in adjacent grooves, and the height of the ends of the coils may be almost the same, so that the heat is also distributed almost evenly. According to another object of the invention, provided that the X-th coil in three phases consist of the same number of turns of wire, and that the ratio of the number of turns of one of the coils wound in the slots of each phase, the number of turns of at least one of the other coils may differ by one, and the number of turns of each of the other coils may not differ or differ by one, next to X-mi coils are coils of other phases with numbers than X. In this design, the imbalance of the number of turns of the stator winding can be minimized in the peripheral direction of the stator. Therefore, it is possible to implement a balanced regulation of the number of turns of the coils. The result is a rational way to avoid contact between adjacent coils wound in adjacent grooves, and the height of the ends of the coils may be almost the same, so that the heat is also distributed almost evenly.According to another object of the invention, the number of turns of the coils can be preferably adjusted in such a way that the total number of turns of the coils in one of three phases is different from the number of turns of the coils of one of the other two phases, and the total number of turns of the coils wound in all the slots that are not a multiple of three. According to this object, the output characteristic of the motor can be easily controlled by adjusting the number of turns of the coils of the stator winding in each phase. For example, in a design with two slots in each phase (in which the stator winding of each phase consists of two coils) they can be located in such a way that the total number of turns of coils in two of the three phases is seven, and in the other phase - eight, and one of the two coils of one of the two phases consists of three turns of wire and the other of four turns of wire, while one of the two coils in the other� phase consists of three turns of wire, and the other consists of five turns of wire. In this design, the total number of turns of coils in two of the three phases is the same, and the difference relative to the number of turns in the other phase is minimal. Consequently, when the current in the circuit of the actuator passes through the stator winding, the strength of the magnetic field generated around each of the stator windings, not so easy ranges. According to another object of the invention, provided that the total number of turns of the coils wound in all the slots that are not a multiple of three, as to the number of turns of the coils wound in the slots of one of the phases, the number of turns of the coils, at least one of the other phases differs by one, and the number of turns of the coils of the other phase may not differ or differ by one. According to this object, in the above structure, the difference in the number of turns of the coils between the different phases can be minimized. Therefore, the imbalance in the number of turns of the coils can be minimized, so that it is possible to implement a balanced regulation of the number of turns of the coils. The result is a rational way to avoid contact between adjacent coils wound in adjacent grooves, and the height of the ends of the coils may be almost the same, so that the heat is also distributed almost evenly. According to another object of the invention, when �slowey, what in regards to the number of turns of the coils wound in the slots of one of the phases, the number of turns of the coils, at least one of the other phases may differ by one, and the number of turns of the coils in the other phase may not differ or differ by one, the X-th coil in three phases consist of the same number of turns of wire, and near X-mi coils are coils of other phases with numbers than X. According to this object, using the above construction, the imbalance of the number of turns of the stator winding can be minimized in the circumferential direction of the stator. Therefore, it is possible to implement a balanced regulation of the number of turns of the coils. The result is a rational way to avoid contact between adjacent coils wound in adjacent grooves, and the height of the ends of the coils may be almost the same, so that the heat is also distributed almost evenly. According to the invention, a method is provided to easily control the output characteristic of the engine by adjusting the number of turns of the coil, which is part of the stator winding, the drive tool with a brushless motor. Other objectives, features and advantages of the present invention will be well understood after reading the following detailed description together with the accompanying drawings and forms�Loy invention. Brief description of the drawings Fig.1 shows impact screwdriver as an example of a power tool according to the invention. Fig.2 is a perspective view showing the stator. Fig.3 is a perspective view showing the stator, inverted relative to the position shown in Fig.2. Fig.4 is a schematic view illustrating the winding of the stator windings in the slots, in the structure having the two grooves in each phase (a total of six grooves). Fig.5 is a schematic view illustrating the winding of the stator windings in the slots, in the structure having three slots in each phase (nine slots). Fig.6 shows examples of connections of the stator windings in design with two slots in each phase (a total of six slots). Fig.6(a) shows a star connection, and Fig.6(b) Delta connection. Fig.7 shows examples of connections of the stator windings in a design with three grooves in each phase (nine slots), wherein Fig.7(a) shows a star connection, and Fig.7(b) - Delta connection. Fig.8 is a schematic diagram illustrating the regulation of the number of turns of the coils according to the first embodiment, in the structure having the two grooves in each phase. Fig.9 is a schematic diagram illustrating the regulation of the number of turns of the coils according to the first embodiment of the � design, having three slots in each phase. Fig.10 is a schematic diagram illustrating a modification 1 of the first embodiment, in the structure having the two grooves in each phase. Fig.11 is a schematic diagram illustrating a modification 1 of the first embodiment, in the structure having three slots in each phase. Fig.12 is a schematic diagram illustrating a modification 2 of the first embodiment, in the structure having the two grooves in each phase. Fig.13 is a schematic diagram illustrating a modification 2 of the first embodiment, in the structure having three slots in each phase. Fig.14 is a schematic diagram illustrating the regulation of the number of turns of the coils according to the second embodiment, in the structure having the two grooves in each phase. Fig.15 is a schematic diagram illustrating the regulation of the number of turns of the coils according to the second embodiment, in the structure having three slots in each phase. Fig.16 is a schematic diagram illustrating a modification 1 of the second embodiment, in the structure having the two grooves in each phase. Fig.17 is a schematic diagram illustrating a modification 1 of the second embodiment of the design, having three slots in each phase. Fig. 18 is a schematic diagram illustrating a modification 2 of the second var�Anta implementation, in the structure having the two grooves in each phase. Fig.19 is a schematic diagram illustrating a modification 2 of the second embodiment, in the structure having three slots in each phase. Fig.20 is a schematic diagram illustrating the regulation of the number of turns of the coils in the case where the beginning and end of the coils located on one side. Fig.21 is a schematic diagram illustrating the regulation of the number of turns of the coils in the case where the beginning and the end coils are from different sides. Fig.22 is a schematic diagram illustrating the regulation of the number of turns of the coils (by changing the number of turns of the coils shown in Fig.20), in the usual way. Fig.23 is a schematic diagram illustrating the regulation of the number of turns of the coil (by changing the number of turns of the coils shown in Fig.21) in the usual way. Fig.24 is a schematic diagram illustrating the regulation of the number of turns of the coils (by changing the number of turns of the coils shown in Fig.20) according to the invention. Fig.25 is a schematic diagram illustrating the regulation of the number of turns of the coils (by changing the number of turns of the coils shown in Fig.21) according to the invention. Fig.26 is a schematic diagram illustrating the regulation of the number of turns of the coils (by changing the number of turns of the coils shown in Fig.20) �the turbine zobretenie. Fig.27 is a schematic diagram illustrating the regulation of the number of turns of the coils (by changing the number of turns of the coils shown in Fig.21) according to the invention. A detailed description of the invention Each of the additional features of the invention and of the method steps disclosed above and further, can be used separately or in conjunction with other features and the method steps to provide and manufacture improved drive tools, and also to provide a method of using such driving tools and their devices. Illustrative examples of the present invention, in which many of these additional features and steps of the method are used together, will be described in detail hereinafter with reference to the drawings. This detailed description is intended only to give the specialist in the art knowledge about the details of a practical embodiment of the preferred aspects of the present invention, and is not restrictive as to the scope of the invention. Scope of the claimed invention is defined only by the claims. Therefore, combinations of features and steps disclosed in the accompanying detailed description are not necessarily practical embodiment of the invention in the broadest sense, and are included solely for the competitive price�specifically describe some illustrative examples of the invention, the detailed description which follows with reference to the accompanying drawings. The illustrative embodiment of the invention will be described with reference to Fig.1-12. According to this embodiment of the electric (battery operated) impact screwdriver 100 is described as an example of the "power tool" according to the invention. According to this embodiment of the, the drive motor 121 hammer screwdriver 100 is a three-phase brushless DC motor, and the stator 135 provided with two notches in each phase, for a total of six grooves. As shown in Fig.1, a percussion instrument 100 according to this embodiment of the mainly includes a casing 101, which forms the outer casing hammer screwdriver 100, and the tip of the screwdriver 109, which is removable attached to the end of the housing 101 and performs the function of tightening screws of various types. The tip 109 of the screwdriver is an element corresponding to the "tip of the tool according to the invention. The housing 101 covers the casing 103 of the engine, the housing 105 of the gear and the handle 107. The housing 103 of the engine accommodates the drive motor 121. The drive motor 121 is an element corresponding "brushless motor" according to the invention. Release button 125 is provided on the handle 107, and pressing the trigger button 125 includes off�l power supply to the drive motor 121. The housing 105 of the gear covers the gear 115, the spindle 112, and the firing pin 114 and 115 emphasis. The gear 111 includes a planetary transmission and accordingly reduces the speed of rotation of the output shaft 122 of the drive motor 121. The gear 111 rotates the spindle 112. The rotation of the spindle 112 causes the firing pin 114 to rotate through the transmission element in the form of a ball 113, which, in turn, causes the rotating stop 115. The firing pin 114 can move relative to the spindle 112 in the longitudinal direction, and a cylindrical compression spring 116 pushes against the plate 115. The front end of the support 115 protrudes from the end of the housing 105 of the gear, and the tip 109 of the screwdriver releasable manner coupled to the projecting end of the support 115. When the drive motor 121 to actuate the purpose of the operation of tightening the screw, and tightening torque on the tip 109 of the screwdriver is small, the spindle of the firing pin 112 and 114 are rotated together. In such reduced load conditions the firing pin 114 is held in the clutch with a focus 115 bias through the efforts of cylindrical compression springs 116. Thus, the stop 115 is also rotated together with the head 114 and the tip 109 of the screwdriver performs an operation of tightening the screw. When the tightening torque is increased to a predetermined high level, the firing pin 114 moves away from the stop 115, counteracting the bias force of the cylinder�parametric compression spring 116. Then the firing pin 114 is engaged with the stop 115, passing a pulsed torque bias through the efforts of cylindrical compression springs 116. Thus, a large torque is produced at the tip 109 of the screwdriver with the stop 115. The working principle of hammer screwdriver 100 is known and will therefore not be described in detail. Now will be briefly described design of the drive motor 121. The drive motor 121 according to this embodiment of the is a three-phase brushless DC motor, battery operated 127. The main elements of the drive motor 121 are the rotor 133 and the stator 135 attached to the body 103 of the engine, which is wound the coil, forming the stator winding. One end (the rear or left end when viewed in Fig.1) of the output shaft 122 rotatably mounted in the housing 103 of the motor through a bearing 123. The other end (on the gearbox side 111, or to the right when viewed in Fig.1) of the output shaft 122 rotatably mounted in the housing 105 of the gear through a bearing 124. When the power supply of the drive motor 121 having the above structure, and the current in the circuit of the actuator is fed to the stator winding 135, the rotor 133 is driven in rotation. The principle of operation of the DC motor is known � therefore will not be described in detail. Next will be described the construction of the drive motor 121 (three-phase brushless DC motor). As shown in Fig.4 and 5, an annular magnet (permanent magnet) 133a is located on the outer peripheral surface of the rotor 133. The stator 135 shown in Fig.2, 3, 4 and 5. In the example shown in Fig.2, 3 and 4, the stator 135 contains six teeth 31-36, continuing radially inward. Six slots S1-S6, or two of groove in each phase, executed between adjacent teeth 31-36. Fig.4 shows the wound wires of the coils forming the stator winding in three phases (phase U, phase V, phase W), and Fig.2 and 3, the stator windings are not wound. In the example shown in Fig.5, the stator 135 has nine teeth 31-39, continuing radially inward, and nine slots S1-S9, that is, three groove in each phase, executed between adjacent teeth 31-39. Next will be explained the structure of each of the stator windings in three phases (phase U, phase V, phase W) formed by the coils wound in the slots. In the example shown in Fig.4, in which each phase is provided by the two grooves, the stator winding 51 of the phase U is formed by a serial or parallel connection of the coils U1, wound around the teeth 31 between the grooves S1 and S2, and the coils U2, wound around the teeth 34, diametrically opposite the prong 31, between the slots S4 and S5. Stator winding 61 phase V arr�place in series or parallel connection of the coils V1, wound around the tooth 32 between the slots S2 and S3, and the V2 coil, wound around the teeth 35, diametrically opposite the prong 32, between the slots S5 and S6. Stator winding 71 W phase is formed by a serial or parallel connection of the coils W1, wound around the teeth 33 between the slots S3 and S4, and the coil W2, wound around the teeth 36, diametrically opposite prongs 33, between the slots S6 and S1. Fig.4 a cross on each of the coils U1, U2, V1, V2, W1, W2 with one hand indicates that the coil passes through a corresponding groove back from the plane of the drawing (from the viewer), and a double circle on each of the coils U1, U2, V1, V2, W1, W2 on the other hand indicates that the coil passes through a corresponding groove forward from the plane of the drawing (toward the viewer). The coils U1, U2, V1, V2, W1, W2 is wound in phase. As shown by the arrows in Fig.4, in the phase U wire coming from the zero point 53 phase U (one output winding 51 of the phase U of the stator), is wound, forming a coil U1, and then the coil U2, and finish the end point 55 of the winding (the other conclusion of the stator winding 51 phase U). In phase V the wire coming from the zero point 63 phase V (one of the terminals of the stator winding 61 phase V), is wound, forming a coil V1 and then V2 coil, and end the end point of 65 phase V (the other conclusion of the stator winding 61 phase V). In phase W wire coming from the zero point 73 W phase (one output of the stator winding 71 FA�s W), is wound, forming a coil W1, and then the coil W2, to the final point of 75 W phase (the other conclusion of the stator winding 71 W phase). Connecting wire 51A, which connects the coils U1 and U2 phase U of the stator winding 51, the connecting wire 61A, which connects the coils V1 and V2 of V phase stator winding 61, and the connecting wire 71A, which connects the coils W1 and W2 of W phase stator winding 71, situated towards one side (the same side) relative to the teeth 31 to 36 in the longitudinal direction and pass through a radially outer section of the end surface of the stator 135 in the circumferential direction to prevent interaction with the rotor 133 mounted in the stator 135. As shown in Fig.6, the coils U1, U2, V1, V2, W1, W2 three-phase stator windings wound around the teeth 31 to 36, are connected in either a star (Fig.6(a)) or a triangle (Fig.6(b)). Fig.6 shows that the coils of one phase are connected in series. In the example shown in Fig. 5, the stator winding 51 of the phase U is formed by a serial or parallel connection of the coils U1, wound around the teeth 31 between the grooves S1 and S2, the coils U2, wound around the teeth 34, spaced at 120 degrees from the prong 31, between the slots S4 and S5, and coils U3, wound around the teeth 37, spaced at 120 degrees from the prong 34, between the slots S7 and S8. Stator winding 61 V phase formed after�ovately or parallel connection of the coils V1, wound around the tooth 32 between the slots S2 and S3, the V2 coil, wound around the teeth 35, spaced at 120 degrees from the prong 32, between the slots S5 and S6, and V3 coil, wound around the teeth 38, spaced at 120 degrees from the prong 35, between the grooves, S8 and S9. Stator winding 71 W phase is formed by a serial or parallel connection of the coils W1, wound around the teeth 33 between the slots S3 and S4, the coil W2, wound around the teeth 36, spaced at 120 degrees from the prong 33, between the slots S6 and S7, and the coil W3, wound around the teeth 39, spaced at 120 degrees from the prong 36, between the grooves S9 and S1. Fig. 5 is a cross on each of the coils U1, U2, U3, V1, V2, V3, W1, W2, W3 with one hand indicates that the coil passes through a corresponding groove back from the plane of the drawing (from the viewer), and a double circle on each of the coils U1, U2, U3, V1, V2, V3, W1, W2, W3 on the other hand indicates that the coil passes through a corresponding groove forward from the plane of the drawing (toward the viewer). The coils U1, U2, U3, V1, V2, V3, W1, W2, W3 is wound in phase. As shown in Fig.5 by the arrows in the phase U wire coming from the zero point 53 phase U (one output winding 51 of the phase U of the stator), is wound, forming a coil U1, U2 and U3, in order, to ending point 55 (the other conclusion of the stator winding 51 phase U). In phase V the wire coming from the zero point 63 phase V (one of the terminals of the stator winding 61 phase V), wind, about�Azua coils V1, V2 and V3 in order, and finish the end point of 65 phase V (the other conclusion of the stator winding 61 phase V). In phase W wire coming from the zero point 73 W phase (one of the terminals of the stator winding 71 W phase), is wound, forming a coil W1, W2 and W3 in the order specified, and finish the end point 75 W phase (the other conclusion of the stator winding 71 W phase). Connecting wire 51A, which connects the coils U1, U2 and U3 phase U of the stator winding 51, the connecting wire 61A, which connects the coils V1, V2 and V3 V phase stator winding 61, and the connecting wire 71A, which connects the coils W1, W2 and W3 W phase stator winding 71, situated towards one side (the same side) relative to teeth 31-39 in the longitudinal direction and pass through a radially outer section of the end surface of the stator 135 in the district, to prevent interaction with the rotor 133 mounted in the stator 135. As shown in Fig.7, the coils U1, U2, U3, V1, V2, V3, W1, W2, W3 three-phase stator windings wound around the teeth 31-39, connected in either a star (Fig.7(a)) or a triangle (Fig.7(b)). Fig.7 shows that the coils of one phase are connected in series. Next will be explained the regulation of the number of turns of the coils of the stator windings 51, 61, 71. Regulation of the number of turns of the coils in this case does not include the regulation by changing position�tions beginning and end of the winding (on the one hand, as shown in Fig.20, or from different sides, as shown in Fig.21) and the control by changing the position of the connecting wires (from the beginning of the winding or from the opposite side relative to the beginning of the winding, as shown in Fig.20 and 21). Fig.20-27 - drawings illustrating the regulation of the number of turns of the coils, and on the construction drawings, where the stator winding of each phase has three coils shown only the phase U. In General, according to conventional techniques, to control the characteristics of the engine by adjusting the number of turns of the coils of the stator winding the number of turns of each coil in each phase is increased. In particular, when the engine shown in Fig.20 and 21, has one coil in each of the coils U1 and U2 phase U, then there are just two turns, is wound through the slots, in the General case, according to conventional techniques, as shown in Fig.22 and 23, the number of turns of each of the coils U1 and U2 phase U, are wound in the respective grooves, increase one turn, so the motor windings which contain four turns. In the case shown in Fig.20 and 22, the beginning and the end of the winding is located on one side, whereas in the case shown in Fig.21 and 23, they are on the different sides. In both cases, however, the windings have the same number of turns (one turn). In particular, with�line with the conventional method, regulation of the number of turns of the coils (engine performance) is an increase (or decrease) in the number of turns of each coil wound in the respective grooves to an integer multiple of. According to the invention, in the engine (Fig.20 and 21) having coils U1 and U2, each of which consists of one loop, there are just two turns which are wound in the respective grooves, as shown in Fig.24-27, by one increases the number of turns of only one of the coils U1 or U2, - so the motor windings which contain three turns. In particular, in Fig.24 and 25 on one only increased the number of turns of the coil U1, and Fig.26 and 27 on one only increased the number of turns of the coil U2. If the stator winding has three coils (three slots) mentioned regulation is the increase (or decrease) the number of turns of each of one or two coils wound in the respective grooves. Next will be explained embodiments of the regulation of the number of turns of the coils of the stator windings 51, 61, 71 according to the invention. (The first implementation option) Fig.8 is a schematic diagram illustrating the regulation of the number of turns of the coils in design with two slots in each phase, which shows the location and number of turns of the coils U1, U2, V1, V2, W1, W2. The figures in the drawing represent the number of turns of the coils. According to this embodiment is implemented�t, the total number of turns of the coils wound in the respective grooves in each phase is seven for each of the three phases U, V and W. In particular, the stator winding 51 of the phase U coil formed U1 of the four coils and coil U2 of the three windings of the stator winding 61 of the V phase coil formed V1 of the two coils and coil V2 of the five windings, and the stator winding 71 W phase formed by the coil W1 of the five coils and coil W2 of the two coils. Therefore, in this case, the number of turns of the coil groove is 3.5. Fig.9 is a schematic diagram illustrating the regulation of the number of turns of the coils in design with three grooves in each phase, which shows the location and number of turns of the coils U1, U2, U3, V1, V2, V3, W1, W2, W3. The figures in the drawing represent the number of turns of the coils. According to this embodiment of the total number of turns of the coils wound in the respective grooves in each phase, is thirteen for each of the three phases U, V and W. In particular, the stator winding 51 of the phase U coil formed U1 of the four coils, coil U2 of the four coils and coil U3 five turns of the stator winding 61 of the V phase coil formed from V1 three turns, coil V2 of the five coils and coil V3 of the five windings, and the stator winding 71 W phase coil formed from W1 three turns, coil W2 of the five coils and coil W3 of five turns. Therefore, � this case, the number of turns of the coil groove is 4.33. In particular, according to the first embodiment of the shown in Fig.8 and 9, the total number of turns in the coils of the stator winding in the slots of each phase, the same for the three phases, and this number is not a multiple of the number of grooves. According to the first embodiment of the construction described above, the total number of turns of the coils of each of the stator windings 51, 61, 71 in all three phases U, V and W are equally (seven). Consequently, when the current in the circuit of the actuator passes through the stator windings 51, 61, 71, the strength of the magnetic field generated around each of the stator windings 51, 61, 71, not so easy ranges. Furthermore, according to the first embodiment of the accurate regulation of the output characteristics of the drive motor 121 hammer screwdriver 100 can be easily performed as needed by adjusting the number of turns on the coils of the stator windings 51, 61, 71. For example, if all coils have four turns, which means that the total number of turns in each of the stator windings of the three phases is eight, the output torque may be too high. However, if all coils have three turns, which means that the total number of turns in each of the stator windings of the three phases is six, then the output torque may be too low. In this case, the desired output characteristics can be obtained by adjusting the number in�Dow coils thus, to the total number of turns of each of the stator windings 51, 61, 71 was seven, as in the first embodiment of implementation. In addition, according to this embodiment of the in which the output characteristic of the drive motor 121 is controlled by the regulation of the number of turns of the coils, in contrast to the prior art (Japanese utility model publication No. 61-3241), where for controlling output characteristics of the engine to use the auxiliary stator winding, no additional space required for the installation of the auxiliary winding in the stator 135, so that we can easily provide space for installation of the stator winding. (Modification 1 of the first embodiment) Fig.10 is a schematic diagram illustrating a modification 1 of the first embodiment in the structure having the two grooves in each phase. In this modification, as shown in the drawing, the total number of turns of the coils wound in the respective grooves of each phase is seven for each of the three phases U, V and W. in addition, the coil U1 stator winding 51 of the phase U coil V1 stator winding 61 of the phase V and the coil of the stator winding W1 71 W phase consists of four turns of wire, each coil U2 stator winding 51 of the phase U coil V2 of the stator winding 61 of the phase V and the coil W2 of the stator winding 71 W phase consists of three revolution�in each wire. In particular, according to the modification 1 shown in Fig.109, the X-th coil, or, for example, the first coil U1, V1, W1 in three phases, beginning with the relevant commencement of the winding have the same number of turns. The number of turns of each other, or second, the coils U2, V2, W2 differs by one from the number of turns of the first coil U1, V1, W1, is wound in the slots of the respective phases. Fig.11 is a schematic diagram illustrating a modification 1 in design, having three slots in each phase. In this modification, as shown in the drawing, the total number of turns of the coils wound in the respective grooves of each phase, is thirteen for each of the three phases U, V and W. in addition, the coils U1, U2 stator winding 51 of the phase U coil V1, V2 stator winding 61 of the V phase and the coils W1, W2 stator winding 71 W phase consists of four turns of wire, each coil U3 stator winding 51 of the phase U, coil V3 stator winding 61 of the phase V and the coil W3 stator winding 71 W phase consists of five turns of wire each. In particular, according to the modification 1 shown in Fig. 11, the X-th coil, or, for example, the first coil U1, V1, W1 in three phases, beginning with the relevant commencement of the winding have the same number of turns. The number of turns of each of the second coils U2, V2, W2 is no different, and the number of turns of each of the third coils U3, V3, W3 differs by one from the number of turns of the first coil U1, V1,W1, is wound in the slots of the respective phases. According to the above-described modification 1 shown in Fig.10 and 11, the difference of the number of turns of the coils wound in the slots of each phase can be minimized. Therefore, it is possible to implement a balanced regulation of the number of turns of the coils. The result is a rational way to avoid contact between adjacent coils wound in adjacent grooves, and the height of the ends of the coils may be almost the same, so that the heat is also distributed almost evenly. (Modification 2 of the first embodiment) Fig.12 is a schematic diagram illustrating a modification 2 of the first embodiment in the structure having the two grooves in each phase. In this modification, as shown in the drawing, the total number of turns of the coils wound in the respective grooves of each phase is seven for each of the three phases U, V and W. in addition, the coil U1 stator winding 51 of the phase U coil V1 stator winding 61 of the phase V and the coil of the stator winding W1 71 W phase consists of four turns of wire, each coil U2 stator winding 51 of the phase U coil V2 of the stator winding 61 of the phase V and the coil W2 of the stator winding 71 W phase consists of three turns of wire each. According to this modification, near X-mi coils, for example, the first coils U1, V1, W1 from ACC�according windings in three phases, there are other (the second) of the coils U2, V2, W2 of the other phases. Fig.13 is a schematic diagram illustrating a modification 2 in design, having three slots in each phase. In this modification, as shown in the drawing, the total number of turns of the coils wound in the respective grooves of each phase, is thirteen for each of the three phases U, V and W. in addition, the coils U1, U2 stator winding 51 of the phase U coil V1, V2 stator winding 61 of the V phase and the coils W1, W2 stator winding 71 W phase consists of four turns of wire, each coil U3 stator winding 51 of the phase U, coil V3 stator winding 61 of the phase V and the coil W3 stator winding 71 W phase consists of five turns of wire each. According to this modification, near X-mi coils, for example, the first coil U1 phase U from the start windings are coils of the other phase different from the phase of U, i.e. the second coil W2 W phase and the second coil V2 phase V. similarly, near the first coil V1 V phase from start windings are coils of the other phase, different from V, i.e. the third coil U3 phase U and the second coil W2 of phase W. in addition, next to the first coil W1 W phase from start windings are coils of the other phase, different from the W phase, i.e. the third coil V3 V phase and the third coil U3 phase U. In particular, according to modification 2 shown in Fig.12 and 13, next to the first coils U1, V1, W1 tre�phase stator windings 51, 61, 71 are arranged coils of different phases with rooms, different from the first. With this arrangement, the imbalance of the number of turns of the stator windings 51, 61, 71 can be minimized in the peripheral direction of the stator 135, and can be implemented more balanced regulation of the number of turns of the coils in comparison with modification 1. (The second implementation option) Fig.14 is a schematic diagram illustrating the regulation of the number of turns of the coils in design with two slots in each phase, which shows the location and number of turns of the coils U1, U2, V1, V2, W1, W2. The figures in the drawing represent the number of turns of the coils. According to this embodiment of the, in the phases U and V, each of the coils U1 and V2 consists of three turns of wire, and each of the coils U2, V1 consists of four turns of wire; this means that the total number of turns of the coils in each of the phases U and V is seven. In the phase W coil W1 consists of five turns of wire, and coil W2 consists of three turns of wire; this means that the total number of turns of the coils is eight. In particular, the total number of turns in the coils wound in all (six) of the grooves is twenty two, i.e. not a multiple of three. In this case, the number of turns of the coil groove is 3,66. Fig.15 is a schematic diagram illustrating the regulation of the number of turns of the coils in design with t�time slots in each phase, which shows the location and number of turns of the coils U1, U2, U3, V1, V2, V3, W1, W2, W3. The figures in the drawing represent the number of turns of the coils. According to this embodiment of the, in the phases U and V, each of the coils U1, V1, U2, V2 consists of three turns of wire, and each of the coils U3, V3 consists of four turns of wire; this means that the total number of turns of the coils in each of the phases U and V is ten. In phase W, each of the coils W1, W2 consists of three turns of wire, and the coil W3 consists of five turns of wire; this means that the total number of turns of the coils is eleven. The total number of turns in the coils wound in all (six) of the grooves, is thirty-one, i.e. not a multiple of three. In this case, the number of turns of the coil groove is 3,44. In particular, according to the first embodiment of the shown in Fig.14 and 15, the total number of turns of the coils in one of three phases different from such numbers, at least one of the two other phases, and the total number of turns of the coils wound in all the slots that are not a multiple of three. According to a second embodiment of the construction described above, the total number of turns of the coils of each of the two stator windings 51, 61 in two of the three phases is the same, and the difference between the stator windings 51, 61 and the other stator winding 71 in the total number of turns of the coils is minimal. Therefore, when�and the current in the circuit of the actuator passes through the stator windings 51, 61, 71, the strength of the magnetic field generated around each of the stator windings, not so easy ranges. In addition, in the second embodiment of the implementation, as in the first, precise control of the output characteristics of the drive motor 121 hammer screwdriver 100 can be easily performed as needed by adjusting the number of turns on the coils of the stator windings 51, 61, 71. In addition, in this embodiment, the implementation where the output characteristic of the drive motor 121 is controlled by the regulation of the number of turns of the coils, in contrast to the prior art (Japanese utility model publication No. 61-3241), where for controlling output characteristics of the engine to use the auxiliary stator winding, no space is required for installation of the auxiliary winding in the stator 135, so that we can easily provide space for installation of the stator winding. (Modification 1 of the second embodiment) Fig.16 is a schematic diagram illustrating a modification 1 of the structure having the two grooves in each phase. According to this modification, in the phases U and V, each of the coils U1, V1 consists of three turns of wire, and each of the coils U2, V2 consists of four turns of wire; this means that the total number of turns of the coils in each of the phases U and V is seven. In phase W, each of the coils W1, W2 consists of four turns of �of rovada; this means that the total number of turns of wire is eight. In particular, according to the modification 1 shown in Fig. 16, with regard to a total of seven turns of the coils U1, U2, is wound in the slots of the phase U, the total number of turns of the coils V1, V2 V phase does not differ from the total number of turns of the coils U1, U2 phase U and the total number of turns of the coils W1, W2 of W phase differs by one. Fig.17 is a schematic diagram illustrating a modification 1 in design, having three slots in each phase. According to this modification, in the phases U and V, each of the coils U1, V1, U2, V2 consists of three turns of wire, and each of the coils U3, V3 consists of four turns of wire; this means that the total number of turns of the coils in each of the phases U and V is ten. In the phase W coil W1 consists of three turns of wire, and each of the coils W2, W3 consists of four turns of wire; this means that the total number of turns of wire is equal to eleven. In particular, according to the modification 1 shown in Fig.17 what is the total number of turns of the coils U1, U2, U3, is wound in the slots of phase U, amounting to ten, the total number of turns of the coils V1, V2, V3 V phase does not differ from the coils U1, U2, U3 phase U and the total number of turns of the coils W1, W2, W3 W phase differs by one. According to the above-described modification 1 shown in Fig.16 and 17, the difference in the number of turns of the coils wound in the slots of each �basics, can be minimized. Therefore, it is possible to implement a balanced regulation of the number of turns of the coils. The result is a rational way to avoid contact between adjacent coils wound in adjacent grooves, and the height of the ends of the coils may be almost the same, so that the heat is also distributed almost evenly. (Modification 2 of the second embodiment) Fig.18 is a schematic diagram illustrating a modification 2 of the first embodiment in the structure having the two grooves in each phase. According to this modification, in the phases U and W, each of the coils U1, W1 consists of three turns of wire, and each of the coils U2, W2 consists of four turns of wire; this means that the total number of turns of the coils in each of the phases U and V is seven. In phase V, each of the coils V1, V2 consists of four turns of wire; this means that the total number of turns of wire is eight. In addition, the X-th coil, for example, the second coils U2, V2, W2 from the beginning of the corresponding windings in the three phases consist of the same number of turns of wire, and near the second coils U2, V2, W2 are other (first) coils U1, V1, W1 of other phases. Fig.19 is a schematic diagram illustrating a modification 2 of the structure having three slots in each phase. According to this modification, in the phases U and V to�of each of the coils U1, V1, U2, V2 consists of three turns of wire, and each of the coils U2, V3 consists of four turns of wire; this means that the total number of turns of the coils is ten for each phase U and V In the phase W coil W1 consists of three turns of wire, and each of the coils W2, W3 consists of four turns of wire; this means that the total number of turns of the coils is eleven. The x-th coil, for example, the first coil U1, V1, W1 from the beginning of the corresponding windings in the three phases consist of the same number of turns of wire. In addition, next to the first coil U1 of the phase U are the coils of the other phase different from the phase of U, i.e. the second coil V2 of the phase V and the second coil W2 of phase W. similarly, near the first coil V1 V phase coils are a different phase than the phase of V, i.e. the second coil W2 W phase and the third coil U3 phase U. in addition, next to the first coil W1 W phase coils are a different phase than the phase W, i.e. the third coil U3 phase U and the third coil V3 phase V. In particular, according to modification 2 shown in Fig.18 and 19, the first coil U1, V1, W1 of the three phases consist of the same number of turns of wire, and next to the first coils U1, V1, W1 stator windings 51, 61, 71 in the three phases are others (not the first) coils of other phases. With this arrangement, the imbalance of the number of turns of the stator windings 51, 61, 71 can be reduced to min�Mumu in the peripheral direction of the stator 135, so it might be made more balanced regulation of the number of turns of the coils in comparison with modification 1. The invention is not limited to the constructions of these embodiments. For example, in these embodiments, the total number of turns of coils in each phase and the number of turns of each coil is described only as an example and can be changed. In addition, the beginning and end of each coil can be located on one side or on different sides in the longitudinal direction of the stator 135. In addition, the connecting wires of the stator winding can be located at the beginning of the winding or from the opposite side relative to the start winding. Specification
1. Driven tool containing a brushless motor, and drive the tool performs a given operation the rotational movement of the tip of the tool using a brushless motor; 2. The drive tool according to claim 1, in which: 3. The drive tool according to claim 2, in which a number of X-mi coils are coils of other phases having numbers that are different from X. 4. Driven tool containing a brushless motor, and drive the tool performs a given operation the rotational movement of the tip of the tool using a brushless motor; 5. The drive tool according to claim 4, in which the total number of turns of the coils in one of three phases differs by one relative to the total number of turns of the coils in the other phases. 6. The drive tool according to claim 5, in which the X-th coil in three phases consist of the same number of turns of wire, and near X-mi coils are others (not X-e) coils of other phases.
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