Stator of rotating electric machine with constant excitation |
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IPC classes for russian patent Stator of rotating electric machine with constant excitation (RU 2516246):
      
 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.
 Autonomous induction generator with bipolar stator winding / 2498483
In the suggested autonomous asynchronous generator bipolar stator winding including twelve coil groups consists of a triangle scheme formed by the second and eighth, fourth and tenth, sixth and twelfth coils groups with the first, second and third outputs to which excitation capacitors are connected and star scheme formed by the first and seventh, third and tenth, fifth and eleventh coil groups with the fourth, Fifth, sixth and seventh outputs; at that the first output is taken from the beginning of united beginnings of the second and twelfth coil groups; the second output - from united beginnings of the fourth and sixth coil groups; the third output - from united beginnings of the eighth and tenth coil group; the fourth output - from beginning of the first coil group; the fifth output - from beginning of the fifth coil group; the sixth output - from united beginnings of the third, seventh and eleventh coil group; the seventh output - from beginning of the ninth coil group. The end of the first coil group is connected to the end of the seventh coil group; the end of the second coil group is connected to the end of the eighth one; end of the third coil group is connected to the end of the ninth one; end of the fourth coil group - with the end of the tenth one; end of the fifth coil group - with the end of eleventh one; end of the sixth coil group is connected to the end of the twelfth coil group; additionally, the first, second and third outputs of the triangle scheme and the fourth, fifth and seventh outputs of the star scheme are interconnected in pairs by compensation capacitors connected in-series and common points of these capacitors connection have outputs to connect load to the generator.
 Six-phase winding of alternating current machine / 2498481
According to this invention winding of alternating current machine with fractional number of slots Q per a pole and phase (both for Q> 1 and Q< 1) is made as per scheme "two stars under 30 el. degrees", with denominator C corresponding to the relationship C = 6·k ± 1, where k = 1, 3, 5 ….
 Four-pole stator winding of asynchronous generator / 2486655
In double-pole stator winding of asynchronous generator consisting of 12 coil groups the end of the 1st coil group is connected to beginning of the 7th one; the end of the 8th coil group is connected to beginning of the 2nd one; the end of the 3rd coil group is connected to beginning of the 9th one; the end of the 10th coil group is connected to beginning of the 4th one; the end of the 5th coil group is connected to beginning of the 11th one; the end of the 12th coil group is connected to beginning of the 6th one; outputs are taken from the joined end of the 7th group and beginning of the 8th one; from the joined end of the 9th group and beginning of the 10th one; from the joined end of the 11th group and beginning of the 12th one; from the joined end of the 4th group and beginning of the 1st one; from the joined end of the 6th group and beginning of the 3rd one; from the joined end of the 2nd group and beginning of the 5th one.
 Four-pole stator winding of asynchronous generator / 2486654
In double-pole stator winding of asynchronous generator consisting of 12 coil groups the end of the 1st coil group is connected to beginning of the 7th one; the end of the 8th coil group is connected to beginning of the 2nd one; the end of the 3rd coil group is connected to beginning of the 9th one; the end of the 10th coil group is connected to beginning of the 4th one; the end of the 5th coil group is connected to beginning of the 11th one; the end of the 12th coil group is connected to beginning of the 6th one. Outputs are taken from the joined end of the 6th group and beginning of the 1st one; from the joined end of the 2nd group and beginning of the 3rd one; from the joined end of the 4th group and beginning of the 5th one; from the joined end of the 2nd group and beginning of the 3rd one; from the joined end of the 7th group and beginning of the 8th one; from the joined end of the 9th group and beginning of the 11th one.
 Electric machine with axial off-centre coolant flow and respective method / 2516234
Invention is related to the field of electric machines. The electric machine has at least one radial cooling groove (16) and axial cooling channels. The first cooling channels (18) with their central axis pass at another radial height in regard to a rotor axis (11) in comparison with the second cooling channels (19). In at least one radial cooling groove (16) there is a spacer (29) by which the first coolant flow (28) from the first cooling channels (18) can be directed to one of the second cooling channels (19). Due to that the second partial packet (T2) in the flow direction can be supplied with colder air when it passes through the first partial packet (T1) in the cold area, for example, close to the shaft.
 Permanent magnet, method of its production, rotor and motor with internal permanent magnet (ipm) / 2516005
Permanent magnet production process comprises the steps that follow. a) Fabrication of permanent magnet (1). b) Cracking of permanent magnet (1) to get two or more separate parts (13). c) Recovery of permanent magnet (1) by jointing rupture surfaces of separate adjacent parts (13) together.
 Magnetoelectric engine / 2515999
In a magnetoelectric engine rotor contains a disc fixed at a shaft whereat a ring-shaped line of permanent magnets with alternating polarity is mounted. A stator contains two parallel plates and the stator windings are placed between them. The stator plates are equipped with cores of electric steel, at which the stator windings are placed. The cores are made as two rings and there are protrusions at their surfaces faced to each other. Width of the protrusion B is equal to half of the permanent magnet C width. Protrusions of one core are off-centred in regard to protrusions of the other core to the half of the permanent magnet C width. The rotor disc is placed between the cores of the stator windings.
 Magnetoelectric generator / 2515998
In a magnetoelectric generator a rotor contains a disc fixed at a shaft whereat a ring-shaped line of permanent magnets with alternating polarity is mounted. The magnets are regularly spaced in regard to each other. A stator contains two parallel plates and the stator windings are placed between them at cores of electric steel, which are fixed at the stator plates. The cores are made as two rings and there are protrusions at their surfaces faced to each other. Width of the protrusion B is equal to half of the permanent magnet C width. Protrusions of one core are off-centred in regard to protrusions of the other core to the half of the permanent magnet C width.
 Liquid-cooling system for electric machinery stators at autonomous objects / 2513042
According to the invention the suggested inductor-type generator containing the front and rear covers, a stator with operating winding, an excitation source and a rotor with a shaft, is equipped additionally with a ferromagnetic ring, closing elements, a star-shaped magnet core with an opening and a non-ferrous insert; at that the ferromagnetic ring is inserted tightly with its first lateral side in the stator zone free of end-connectors, at the other side of the ferromagnetic ring there are installed closing elements connected to sprocket teeth and the sprocket itself is connected to the rear cover by the non-ferrous insert and the rotor with the shaft is placed in a central opening of the sprocket.
 Modular electromagnetic device with reversible generator-motor operation / 2510559
Modular electromagnetic device has a stator and a rotor rotating between facing surfaces of the stator and bearing a plurality of magnets distributed with alternate orientations in a substantially annular pattern. The stator comprises at least one pair of magnetic yokes symmetrically located at both sides of the rotor. Each yoke has a pair of projecting arms extending towards the magnets and bearing a respective coil for receiving electric power from or supply of electric power to the electromagnetic device. Each yoke is individually mounted on its own support equipped with adjusting units arranged to adjust the yoke position relative to the oppositely lying magnets. The yoke forms, together with its coils, its support, its adjusting units and measuring and control means controlling the yoke adjustment, an elementary stator cell that can be replicated to form single-phase or multiphase modules.
 Modular electric machine / 2510121
Modular electric machine comprises electromagnetic modules, which consist of two U-shaped cores arranged with their ends to each other so that ferromagnetic inserts on the rotor installed between two cores match in the projection with ends of each pair of two U-shaped cores. Electromagnetic modules are fixed along the circumference without radial displacement relative to each other, windings of the anchor are wound separately on each rod of the U-shaped core, which are arranged further from the machine shaft, and the excitation winding is made toroidal, common for all electromagnetic modules of each fixed part of the stator, as a result of which rods of U-shaped cores that are close to the machine shaft are arranged tightly to each other, which results in maximum reduction of distance between electromagnetic modules. At the same time anchor windings of one phase displaced by a pole division are connected as matching in series.
 Single-phase induction motor / 2510120
Single-phase induction motor comprises a rotor and a stator with slots, where main and auxiliary windings are installed, forming nonsalient poles with displacement of magnetic axes relative to each other by half of a pole division. In the stator yoke in the field of slots arranged in zones of magnetic axes of the main winding, there are non-magnetic gaps with formation of saturation bridges.
 Magnetic system of stator / 2507663
Magnetic system of a stator comprises radially magnetised polar permanent magnets, in the cross section having a shape of curvilinear pentagons facing the working gap with a curvilinear side. Between the pole magnets there are tangentially magnetised pole-to-pole permanent magnets installed, adjoining the pole ones via permanent magnets, supplementing the pole magnets to circular segments and magnetised in direction providing for coupling of magnetic flows of pole and pole-to-pole magnets.
 Stator design for electric motors divided along axis / 2507662
Stator for an electric motor comprises a lengthy tubular body that defines a central cavity, in which a rotor may be installed. The rotor body defines a sequence of axial slots stretching in parallel to the axis of the body and a sequence of electric conductors stretching along channels for generation of electric windings. The rotor body is formed at least from two partially round segments of substantially one length. At the same time the segments determine the central cavity.
 Rotor magnetic system / 2244370
Rotor magnetic system has more than two magnetically permeable steel laminations with pole horns formed by prismatic tangentially magnetized N-S permanent magnets placed inside laminated stack; inner and outer diameters of laminations are uninterrupted and rectangular prismatic magnets are installed inside them so that distance over outer arc between external planes of two adjacent magnets of unlike-polarity poles is shorter than that over internal arc between same planes; magnets do not contact one another and have at least one projection on inner diameter for coupling with rotor shaft.
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FIELD: electricity. SUBSTANCE: 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. EFFECT: reducing rest and swivel moments occurring in the rotating electric machine (1) with constant excitation. 4 cl, 2 dwg
The invention relates to a stator of a rotating electric machine with permanent excitation. In a rotating electric machine with permanent excitation, such as in a generator with constant excitation or motor with constant excitation, in particular, the moments of calm in the rest of the electric motor is a critical parameter in the design. The amplitude of the moments of rest should be as minimal as possible. In addition, the moments of swing, which arise under load, must be supported by capabilities small. In particular, when directly driven wind power generator with constant excitation moments of peace that occur at rest and moments of swing, which arise during operation of wind power generator, must be supported by capabilities small. To minimize the chances of swing currently used mainly in the following ways: - tilt (mowing) of permanent magnets arranged in the rotor of the electric machine, - mowing the electrical conductors in the stator of the electric machine, - the offset of the permanent magnets of the rotor relative to the pole center. The above known methods are associated, however, with a significant cost of production Especially in powerful electric machines, the stator is usually equipped with a so-called double-layer windings, in rare cases, also with single-layer windings. To be able to implement coils of the same width, it is usual, especially in two-layer windings, run the width of the teeth and grooves so that we obtain a uniform width of the step grooves around the circumference of the stator, the teeth and grooves have the same width. In a single-layer windings with three tiers or barrel-shaped coils by placing coils of the group of coils, on the contrary, for each group of coils is implemented so-called double-step grooves, so that each group of coils is obtained by the so-called pole pair. After each group of coils is the area on the circumference of the stator, in which not posted any coil. This feature locations can be used to vary the width of the step grooves around the circumference of the stator, but the width of the coils should not be different. This can be used to reduce the arising moment of rest and swing and improve the shape of the distribution curve of the magnetic induction (winding ratio). Object of the invention is to reduce the moment of rest and/or swing, resulting in a rotating electric machine constant is m excitation. This problem is solved by means of a stator of a rotating electric machine with permanent excitation, and the stator has multiple passing in the axial direction of the stator teeth and grooves, and along the circumference of the stator there are groups of coils, and the group of coils are, respectively, the at least three coils, which are arranged in the circumferential direction directly in sequentially spaced slots, all slots have the same width NB groove, and teeth that are not in the middle of the group of coils and not between the two is placed in the circumferential direction directly consecutive groups of coils, have a uniform width of teeth ZB and in the middle of the first group of coils placed average tooth, which has a first width MW medium wave, and the stator has a second group of coils, the first and second groups of coils placed in the circumferential direction directly one after the other, and between the first and second groups of coils placed first marginal tooth, which has a first width RB marginal teeth, and the first width RB of the regional prong essentially equal to RB=a·ZB and the first width MW of the middle prong is essentially equal to MV=(2-a)·ZB moreover, the coefficient a is greater than 0 and less than 1, and the coefficient and more h is m 0 and the maximum is equal to 0.35. Preferred embodiments of the invention are given in the dependent claims. Is preferable if the ratio is greater than 0 and the maximum is equal to 0.35. If the ratio is greater than 0 and the maximum is equal to 0.35, a moment of rest and/or swing fall especially heavily. In addition, it appears preferable if the width of the marginal teeth and the width of the secondary teeth in other groups of coils is made, in the first group of coils, and the coefficient for all groups of coils is identical, or the ratio is different for at least two groups of coils. If the ratio for all groups of coils is identical, the result is a symmetric General structure, and moments of rest and/or swing fall particularly hard. If the ratio is different, the stator can be produced particularly simply. Rotating electric machine with permanent excitation may be performed, for example, as a generator or motor, and the generator can be performed, in particular, as a wind power generator and, in particular, as a wind power generator with direct drive wind wheel directly, without intermediate enabled gearbox, connected with ferroelectrically the generator). The exemplary embodiment of the invention represented in the drawings and explained in more detail below. While the drawings shows the following: figure 1 - schematic view corresponding to the invention of the rotating electrical machine with permanent excitation and figure 2 - schematic detailed view of a fragment corresponding to the invention the stator of the machine. Figure 1 shows a schematic view corresponding to the invention of the rotating electrical machine 1 with constant agitation. The machine 1 of the embodiment is designed as a generator, and in particular, as a wind power generator. Here it should be noted that for clarity, figure 1 shows only the elements of the machine 1, is essential for the understanding of the invention. Machine 1 has a rotor 2, which is placed rotatably about the axis R of rotation of the machine 1. Thus, the rotor 2 includes all posted with the possibility of rotation about the axis R of the vehicle 1. The rotor 2 has a rotor yoke 3, hosts the permanent magnets, and for clarity, in figure 1 only the permanent magnet 4 are provided with a reference position. When working machine 1, the rotor 2 rotates in this example, the implementation with respect to the stator 5 which is placed at the center of the machine 1 which is stationary relatively to the environment of the machine 1. So macrotor 2 is located around the stator 5, such a machine is defined as the outer rotor. As the rotor 2 has permanent magnets, which are constantly generate a magnetic field for operation of the machine 1, such a machine is defined as a machine with a constant excitation or excitation by permanent magnets. Since the machine 1 has a rotor 2, a rotating when the machine is in operation 1 around the axis R of rotation of the rotor of this machine is also called rotary electrical machine. The stator 5 has a few passing in the axial direction Z of teeth and grooves, and for clarity, in figure 1 only the teeth 7a, 8A and 9 and the groove 6A provided with a reference position. When the stator in this embodiment, consists of arranged one after another in the axial direction Z of the iron sheets. When this individual leaves, usually equipped with an electrically insulating layer, for example a layer of lacquer. The teeth and grooves of the segments are formed by a corresponding execution of the form of sheets. In grooves around the teeth are electric coils of the stator, and coils, for clarity and because they are not essential to the understanding of the invention, not shown in the drawing. In conventional rotating electrical machines with permanent excitation of the width of the individual teeth 5 of the stator all the same. In accordance with the invention, the purposeful increase and decrease the width of the definition of the different teeth in relation to the other teeth of the stator moments of peace and swing, arise when working machine 1, are reduced. Here it should again be noted that figure 1 shows a schematic representation in which, for example, in particular, the width, the number and size of teeth, grooves and permanent magnets, as well as the size of the air gaps between the stator and rotor do not correspond to reality. Figure 2 in the form of a schematic view in cross-section a fragment of the stator 5. For clarity, the fragment of the stator 5 are not shown in the form of a circular arc, as in reality, and schematically in the scan plane. Along the circumference of the stator 5 is placed groups of coils, and the group of coils are, respectively, the at least three coils. While figure 2 shows the first group of coils 10A, which consists of three coils R1, T1 and S1, and the second group of coils 10b, which consists of three coils R2, T2 and S2. The coil is shown only symbolically. The second group of coils 10b in the circumferential direction U of the stator is directly after the first group of coils 10A. For clarity, in figure 2 only the grooves 6A and 6d are provided with a reference position, all of the slots of the stator are of the same width NB groove, i.e. single width NB groove. The first group of coils 10A has in this exemplary embodiment, as already noted, the coil R1, T1 and S1, and the second group 10b coils - coil R2, T2 and S2. When this coil R1 passes, as indicated with what psalom coil R1, in the grooves 6A and 6d and surrounds thereby teeth 7a, 7b and 8A. Accordingly, the remaining coils are held in grooves that are associated with the slots, as represented by the symbols of the reels. Through the coils R1 and R2 flows phase current R through coils T1 and T2 elapses phase current T, and through the coils S1 and S2 - phase current of S. In this case a group of coils placed along the circumference of the stator. As already explained, in the framework of the exemplary embodiment, the groups of coils are, respectively, three coils. This is not necessarily so, and the group of coils may have more than three reels. So, for example, groups of coils may also have six coils, and in this case through the first two directly following each other in the circumferential direction U of the coil flows phase current R, through the following two directly following each other in the circumferential direction U of the coil flows phase current T, and through the following two directly following each other in the circumferential direction U of the coil flows phase current S, so that, in General, occurs three-phase alternating current system. The first group of coils 10A correspond to the teeth 7a, 7b, 8A, 7C, 7d and the tooth 9. The second group of coils 10b correspond to the teeth 7E, 7f, 8b, 7g, 7b, and 11. Teeth, which are located in the middle of the groups of coils, hereinafter referred to as medium-sized teeth, and the teeth, which are located between the two right near St the public following each other in the circumferential direction U of the groups of coils hereinafter referred to as marginal teeth. First middle prong 8A is placed in the middle of the first group of coils 10A and the second secondary tooth 8b is placed in the middle of the second group of coils 10b. The first edge of the prong 9 is placed between the first group of coils 10A and second 10b coils. In the circumferential direction U of the stator after the first group of coils 10A is immediately followed by the second group of coils 10b. The second marginal tooth 11 is located between the second group of coils 10b and is not shown in figure 2, the third group of coils. Teeth that are not in the middle of the group of coils and not between two directly following each other in the circumferential direction of the stator groups of coils, all have the same width ZB-wave, i.e. single width ZB teeth. In this example perform this teeth 7a, 7b, 7C, 7d, 7e, 7f, 7g and 7h. The teeth 7a, 7b, 7C, 7d, 7e, 7f, 7g and 7h are of uniform width ZB teeth. As already explained, all of the grooves have the same width NB groove, i.e. single width NB groove. First middle prong 8A has a first width MW medium wave, and the first marginal tooth has a first width RB marginal teeth. For the purposes of this example, run the middle prong in all groups of coils has the same width MW medium wave, i.e. single width MW of the middle prong. In addition, all marginal teeth are of the same width RB edge of the tooth, i.e. single width RB marginal teeth. <> In the conventional stator of a rotating electric machine with permanent excitation of all teeth and all slots have the same width. This means that the so-called width NTB step along the slots, which is the sum of the width of the tooth and the width of the groove immediately following tooth, in the case of conventional stator is obtained from the relation:
and N is the number of grooves, U - circumference of the stator and r is the radius of the stator. In accordance with the invention to reduce the moment of rest and/or swing width of the step grooves is changed, the width of the tooth, which is located between two directly following each other in the circumferential direction of the groups of coils is reduced by the factor a, and, accordingly, the coefficient a, the width of the tooth, which is located in the middle of the group of coils, which is referred to the regional wave increases. The first width RB marginal teeth of the first marginal tooth 9, therefore, in relation to the width ZB teeth is reduced and, accordingly reducing the first width MW of the middle prong of the first middle teeth 8A increases. For the first width RB marginal teeth rightly so:
and for the first width MW of the middle prong is true:
moreover, the coefficient a is greater than 0, and the maximum is equal to 0.35. Width ZB-wave corresponds to the length of the circular arc at an angle of α1width NB groove corresponds to the length of the circular arc at an angle of α2, Thus, the following applies:
and r is the radius of the stator. The radius r of the stator passes from the axis R of rotation before facing the rotor 2 side of the tooth (see figure 1). The corresponding angle is an angle that is covered by passing in the axial Z-direction edges facing toward the rotor 2 sides of the respective teeth, proceeding from the axis R of the rotor (see figure 1). Facing the rotor 2 side of the first middle teeth 8A figure 1 is provided with a reference position 13, and held in the axial direction R of the edge facing the rotor 2 side 11 of the first middle teeth 8A provided in figure 1 the reference positions 12A and 12b. Due to the corresponding image the structure reduce the width of the marginal teeth and a corresponding increase in the width of the middle prong width of the coils does not change. The distance between the coils within the group of coils equal. Thus, it turns out, as in a conventional stator, a symmetric three-phase system of alternating current. The width of the NB groove is selected so that the coil is fixed in the grooves. If the ratio is greater than zero and the maximum is equal to 0.35, the resulting moments of rest and/or swing especially strongly reduced. In this example implementation, the width of the marginal teeth and the width of the secondary teeth in other groups of coils are made, respectively, as in the first group of coils 10A, and the coefficient for all groups of coils is identical. The width of the middle prong of the second secondary tooth 8b, therefore, the same magnitude as the width of the middle prong of the first middle teeth 8A, and the width of the marginal teeth of the second marginal tooth 11, thus of the same magnitude as the width of the marginal teeth of the first marginal tooth 9. As an alternative, the value of the coefficient a in groups of coils may be different. For example, the ratio for the first group of coils 10A may be 0.1, while for the second group of coils 10b is 0.2, so that the width of the secondary teeth 8A and 8b and the width of the marginal teeth 9 and 11 various values. 1. The stator of a rotating electric machine (1) with constant agitation, and the stator (5) is n is how many passes in the axial direction (Z) of the stator (5) of teeth (7a, 8a, 9) and grooves (6a, 6d), and along the circumference of the stator (5) there are groups (10a, 10b) of the coils, and groups (10a, 10b) of the coils are, respectively, the at least three coils (R1, T1, S1), which are arranged in the circumferential direction (U) directly in sequentially spaced slots, all slots have the same width NB groove, and teeth that are not in the middle of the group (10a, 10b) of the coils and not placed in between the two circumferential direction (U) of the stator (5) directly one after the other groups (10a, 10b) of the coils have the same width ZB teeth, and in the middle of the first group (10a) coils placed middle prong (8a), which has a first width MB middle prong, and the stator (5) has a second group (10b) coils, and the first and second groups of coils placed in the circumferential direction (U) directly one after the other, and between the first and second groups of coils placed first marginal tooth (9), which has the first width RB marginal teeth, and the first width RB of the regional prong essentially equal 2. The stator according to claim 1, characterized in that the width of the marginal teeth and the width of the secondary teeth OST the selected groups of coils made according to as for the first group (10a) coils, and the coefficient for all groups of coils is identical or the ratio is different for at least two groups of coils. 3. Rotating electric machine with permanent excitation, and the machine is made as a generator or electric motor and has a stator according to any one of the preceding paragraphs. 4. Rotating electric machine with permanent excitation according to claim 3, characterized in that the generator is designed as a wind power generator.
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