Car steering wheel electromechanical booster
SUBSTANCE: invention relates to automotive industry, namely, to car steering wheel electromechanical booster. Proposed booster comprises housing accommodating two aligned shafts (input and output), m-phase motor excited from tangentially magnetised permanent magnets, stator magnetic core built in booster housing, rotor magnetic core, rotor position pickup and torque pickup. Stator magnetic core features salient poles arranged in Nm equal alternating phase zones, where N is number of phase zones, and with Nmk poles, where k=1…n is number of poles in phase zone whereon coils are fitted, one per one pole. Several coils connected in parallel aiding are arranged in each zone. Rotor windingless multi-pole magnetic core is fitted on output shaft. Number of poles on stator and rotor differ by N. Torque pickup is made up of torsion box and torsion box twisting angle metre. Torsion box is arranged inside space formed by input and output shafts. Pole tips are arranged on stator poles via nonmagnetic air gap, whereto like poles of excitation system permanent magnets adjoin.
EFFECT: improved ergonomics due to reduced force to applied to steering wheel.
4 cl, 4 dwg
The technical field to which the invention relates.
The invention relates to the automotive industry.
The level of technology
Known Electromechanical power steering, comprising a housing and arranged in two coaxial shaft (input and output), m-phase motor with excitation from tangentially magnetized permanent magnets, the magnetic circuit of the stator is built into the body of the amplifier, the magnetic circuit of the stator is made with salient poles arranged at equal to 2m alternating phase zones, with the number of poles 2mk, where k=1...n is the number of poles in the phase zone that hosts coils - one for each pole, each zone has posted a few included in series or in parallel according-according coils, the magnetic circuit of the rotor located on the output shaft, made multipolar winding, the number of poles on the stator and on the rotor differ by two, the position sensor rotor, a torque sensor, made in the form of torsion meter of the twisting angle of the torsion bar, the torsion bar is located inside the cavity formed by the input and output shaft (EN 2181091, 62D 5/04, 2000 and EN 2278797, 62D 5/04, NC 21/16, 2006).
The disadvantage of these Electromechanical power steering is the relative complexity of the design and low-tech manufacturing due to the closely located on the rotor permanent magnets that conditioned the t complexity of Assembly operations in the Assembly of the rotor and stator in a single structural unit. Besides the above-mentioned power steering have high enough energy indicators due to the fact that the working magnetic flux from the magnetic field from the stator windings is closed through the permanent magnet excitation system having a low magnetic permeability (and hence low conductivity magnetic flux and having a considerable thickness, at least, different from the length of the air gap on the order in a big way. The latter is determined by the manufacturing technology of magnets and constructive necessity. For example, if the length of the air gap of 0.15-0.25 mm, the thickness of the magnet must be in the range of 2.5 to 4.0 mm
In the above amplifiers pole division of rotor poles and stator varies. This fact leads to the appearance of higher harmonics of the magnetic conductivity in the working gap and poor energy performance.
A relatively small number of salient poles on the stator and the rotor causes a significant amount of the pulsating torque, caused by the action of the field permanent magnet excitation when de-energized stator windings, which leads to increased effort on the steering wheel, creates inconvenience to the driver when the use of these amplifiers, i.e. leads to poor ergonomic features.
The essence of what bretania
The closest to the essence of the present invention is the prototype of the proposed technical solution is the Electromechanical power steering of the vehicle described in EN 2278797, 62D 5/04, NC 21/16. The objective of the proposed technical solution is the improvement of manufacturability, improve energy performance and ergonomic characteristics of Electromechanical power steering of the car.
To improve the manufacturability results in the placement of the permanent magnet excitation on the stator of the motor between the pole pieces that are adjacent to the pole tips of the poles of the same polarity, pole pieces at the poles established through the non-magnetic gap measure based air gap. This placement of the magnets also leads to the possibility of increasing the conductivity of the magnetic circuit of the circuit of the magnetic flux field from the stator windings, which ultimately leads to improved energy performance.
To improve energy performance also contributes to the implementation of the width of the salient poles on the stator and the rotor and the pole divisions between the poles of the rotor and stator within one phase zone is equal, the offset pole divisions between the poles of adjacent phase zones of the stator 1/3 pole division of the rotor.
List of figures, drawings and other materials
Figure 1 shows a cross section of the electric motor offer power steering of the car.
Figure 2 shows a section of the active zone of the electric motor Electromechanical power steering with equal widths of the poles on the stator and the rotor, and with equal pole divisions between the poles of the rotor and stator within phase zones.
Figure 3 shows the active area of the motor with a uniform location on the circumference of rotor poles and stator with equal widths of the poles.
Figure 4 shows the active area of the motor with toothed surfaces of the rotor and stator.
Information confirming the possibility of carrying out the invention
The proposed Electromechanical power steering in their design is similar to the prototype, except for the distinctive parts described above.
Figure 1 shows the cross-section of the motor (other constructive elements of the Electromechanical steering not shown). The stator 1 of the motor, which is the body of the amplifier, made from soft magnetic material of the magnet with the number of poles Nmk=12, where N=1...n, the number of zones of poles phase; N=2,k=2, m=3, each pole of which is placed a coil 2; these coils, connected in parallel according constitute a phase winding of the stator. Phase winding localized in evenly spaced around the bore of the stator N zones. When the three-phase stator winding of such zones is six, as shown in figure 1, zones of opposite phases are shifted relative to each other at 120 e. C. At the poles of the stator through the non-magnetic gap length δnemagset pole pieces 3. These pole tips from the sides adjacent radially spaced permanent magnets 4 excitation system. Magnets magnetized in the tangential direction and the pole tips adjacent poles of the same polarity. The rotor of the electric motor 5 is made winding of the magnet with the number of poles N(mk+1)=14 and mounted on the shaft 6. The number of poles on the rotor and even differs from the number of poles on the stator by two.
Excitation system consisting of tangentially magnetized permanent magnet that forms a magnetic field, the magnetic flux which is divided into two parts: one part which closes the circuit through the pole pieces, an air gap, the pole and the back of the rotor; the second part is through the pole pieces, a non-magnetic gap between the tips and the stator poles, the poles of the stator and the back of the stator is. The ratio of the lengths of the working air δpand nonmagnetic δnemaggaps determines the magnitude of the magnetic flux. Specific values of the lengths of the gaps are determined based on considerations of the maximum energy of permanent magnets. It is obvious that the length of the air gap δpand nonmagnetic gap δnemagshould be comparable in the same order, and their ratio must be chosen for reasons of concentration greater part of the magnetic flux of the excitation system fpostin the air gap. In the figure 1 case, the width of the pole pieces is larger than the width of the poles on the stator, which leads to high conductivity for magnetic flux through the air gap compared to the non-magnetic gap even when they are equal.
When connecting the coils of the stator winding to a power source of the magnetic field from permanent magnet excitation system and the field from the stator windings will be formed, forming the resulting magnetic field. The rotor will occupy such a position in which the conductivity for the highest value of the resulting magnetic flux maximum. As shown in figure 1, in this case, the magnetic flux from the field winding of the stator fslaveand a large part of the magnetic flux field excitation fpostin the air gap, the poles of ispence rotor and directed according to the fold. The non-magnetic gap, the poles of the stator and the back stator fslavedirected counter small part of the flow fpostand therefore, they are deducted. The interaction of the field excitation windings and the stator in the air gap causes the appearance of a torque of the rotor, and its value is greater, the greater the value of magnetic flux. As the magnetic conductivity of the magnetic flux field of the stator winding fslavethe proposed electric power steering is significantly greater than in known, with significantly lower values of current consumption is achieved the required torque of the output shaft of the amplifier. Thus the energy performance of the proposed power steering of the car is better than in the known technical solutions.
When the proposed method of placement of the magnet excitation system facilitates the Assembly process of the motor: first is the placement of the windings on the poles, installation of pole pieces, assembling the stator-rotor", only then are permanent magnets according to their localization. This simplifies operations with permanent magnets, reduces Assembly time and does not require the cost of producing expensive special technological equipment for Assembly of magnetic systems.
Figure 2 shows the Yong Electromechanical power steering of the vehicle, expressed pole of the stator and rotor of the motor which is made equal to the width of the inp, the poles of the stator within the phase zones have equal pole division with the poles of the rotor τ. Adjacent pole (bordering poles of other phases) of different phases are shifted relative to each other at a distance that is a multiple of 1/3 pole division of the rotor (4/3τ). This placement of the poles leads to a change in conductivity of the air gap for the magnetic flux during rotation of the rotor relative to the stator by a harmonic dependence of the maximum to the minimum value. This circumstance leads to the reduction of higher harmonic components of torque and improves energy performance.
Figure 3 shows the Electromechanical power steering of the vehicle, expressed pole of the stator and rotor of the motor which are evenly spaced around the circumference, is made equal to the width of the inp, polar division of the stator differs from pole dividing the rotor τ 1/3 of the value of the pole division of the rotor, adjacent coils of the same name connected in opposite phase-sequence or counter-parallel, the number of poles on the stator is different from the number of poles on the rotor by the number of pairs of poles phases. In this construction the number of pairs of poles phases is four. Therefore, the number of poles p is the Torah made equal to 16. Workflows in the electric power steering similar to that described above. This design is one of the options that achieve their purpose.
Figure 4 shows an embodiment of the electric motor Electromechanical power steering car with the toothed surfaces of the active parts facing to each other surfaces of the rotor and stator are made of gear with the same width of teeth, and in equal subcommi divisions τz. Pole stator within phase zone is made with equal pole division multiple subcolony division, the adjacent poles of different phases are shifted relative to each other at a distance that is a multiple of 1/3 subcolony division.
When the rotation of the rotor relative to the stator periodically in proportion to the frequency displacement of the rotor relative to each other, there occurs a redistribution of the magnetic flux of the excitation system between poles of different phases. This redistribution is proportional to the difference between the conductivity of the air gap under the poles of different phases. In case the surfaces of the stator poles and rotor smooth the difference between the conductivity of the air gap for the flow of excitation is proportional to 1/3 the width of the pole division. When running surfaces of the pole teeth, the difference in the conductivity of the air gap is proportional to 1/3 zu novogo step. From the above it follows that the difference between the conductivity of the excitation current in the second case is much less than in the case of performing smooth poles. Thus, by performing the surface of stator poles and rotor gear is achieved by reducing the pulsation of the magnetic flux of the excitation system in the air gap. This circumstance leads to a reduction in effort when turning the steering wheel when de-energized windings on the stator and improved ergonomic characteristics of the Electromechanical power steering of the car.
1. Electromechanical power steering of a vehicle, comprising a housing and arranged in two coaxial shaft (input and output), m-phase motor with excitation from tangentially magnetized permanent magnets, the magnetic circuit of the stator integrated in the housing of the amplifier and is made with salient poles arranged in Nm equal phase alternating zones, where N is the number of phase zones, with the number of poles Nmk, where k=1...n is the number of poles in the phase zone that hosts coils - one for each pole, each zone contains multiple connected in parallel according coils, the rotor magnetic circuit located on the output shaft and made multipolar winding, the number of poles on the stator and on the rotor differ by N, the sensor rotor position and torque sensor, made in the de torsion meter of the twisting angle of the torsion bar, the torsion bar is located inside the cavity formed by the input and output shafts, characterized in that the stator poles through the non-magnetic gap measure based air gap installed pole pieces, which are adjacent permanent magnet excitation system poles of the same polarity.
2. Electromechanical power steering according to claim 1, characterized in that the distinct poles of the rotor and stator is made equal to the width of the poles of the stator within the phase zones have equal pole division with the poles of the rotor, adjacent poles of different phases are shifted relative to each other at a distance that is a multiple of 1/3 pole division of the rotor.
3. Electromechanical power steering according to claim 1, characterized in that the distinct poles of the stator and rotor are evenly spaced around the circumference of the pole division of the stator differs from pole dividing the rotor 1/3 of the value of the pole division of the rotor, adjacent coils of the same name phases connected in opposite series or parallel counter, the number of poles on the stator and the rotor differs by the number of pairs of poles phases.
4. Electromechanical power steering according to any one of claims 1 to 3, characterized in that the surface of the rotor and the poles of the stator is made of gear with the same width of teeth and equal subsoil division, the poles of the stator within the phase zones have equal floor the red division, fold subcolony division, the adjacent poles of different phases are shifted relative to each other at a distance that is a multiple of 1/3 subcatego division.
SUBSTANCE: invention relates to the field of electric engineering and may be used in three-phase machines with excitation from permanent magnets. Proposed three-phase synchronous motor consists of three-phase stator, winding of which create rotary magnetic field, and rotor, which comprises bushing of non-ferromagnetic material, strip of excitation from ferromagnetic plates with layers of plates of permanent magnets and additional poles of ferromagnetic material with layers of non-ferromagnetic material installed along radial axes of additional poles.
EFFECT: provides for maximum efficiency of motor determined by ratio between useful mechanical capacity developed by motor (Pmech use) and electric power consumed by motor (Pel cons).
SUBSTANCE: syncronous generator includes stator magnet core made from laminated electrical steel having explicit poles where stator windings are situated, and rotor including rotor ferro-magnetic bushing where excitation poles are located. Besides according to the invention, ferro-magnetic shields are located at both sides of each pole. The said rotor bushing is manufactured with radial grooves being located under each excitation pole to ensure full excitation flowing through rotor poles and stator winding flows through the said shields and rotor bushing with maximum possible distance of stator flow in rotor bushing from excitation poles.
EFFECT: improved effectiveness of synchronous generators defined as ratio of available mechanical power produced by generator to mechanical power consumed by generator.
SUBSTANCE: invention relates to the field of electric engineering and in particular to slow-speed high-torque electric motors, electric drives and generators, relates to peculiarities of design of contactless magnetoelectric machines with electromagnet reduction and may be used in systems of automatics, as motor-wheels, motor-drums, starter-generators, electric steering boosters, direct drives in domestic appliances, electric drives of concrete mixers, weight-lifting mechanisms, belt conveyors, pumps for liquids pumping, mechanisms with high torques on shaft and low frequencies of its rotation, and also in wind generators, hydraulic generators, high-frequency electric generators and synchronous generators of frequency converters. Proposed contactless redactor magnetoelectric machine with pole geared inductor comprises stator, anchor core of which is assembled from insulated sheets of electrotechnical steel with high magnetic permeability and has explicit poles, on inner surface of which there are elementary cogs provided, coil m - phased winding of anchor, each coil of which is arranged on according explicit pole of anchor by one on each pole, and rotor comprising inductor with geared poles symmetrically distributed along cylindrical surface with identical number of elementary cogs on each pole, between geared poles of inductor there are permanent magnets installed, which are magnetised in tangential direction. When certain ratios are maintained between number of explicit poles of anchor, number of elementary cogs on explicit pole of anchor, number of explicit poles of anchor in phase, common number of anchor cogs, number of geared poles of inductor, common number of inductor cogs, number of elementary cogs on geared pole of inductor and number of phases in m-phased winding of anchor in contactless reductor magnetoelectric machine with pole geared inductor.
EFFECT: provides for high power and operational indices, high specific rotation torque on shaft and high electromagnetic reduction of rotation frequency in mode of electric motor, and high specific power at high frequencies of EMF in mode of electric generator.
10 cl, 11 dwg
FIELD: electrical engineering.
SUBSTANCE: invention relates to electrical engineering and can be used in washing machine motors. The motor with intensive magnetic flux incorporates circular stator with the winding wound on multiple teeth arranged radially. The rotor is fitted in the stator center and comprises a circular rotor core, multiple teeth extending from the aforesaid core and towards the stator and multiple magnets arranged between the said magnets teeth. The section of the joint between the circular rotor core and the tooth is furnished with a small-diameter hole to receive the guide pin. Note also that the bridge connecting the adjacent teeth, or in the end section of the tooth abutting on the circular rotor core, is furnished with a barrier to eliminate the magnetic flux dissipation.
EFFECT: motor higher torque and smaller sizes.
7 cl, 12 dwg
FIELD: electric engineering, in particular, electric motors with constant magnets.
SUBSTANCE: electric motor with constant magnets includes stator with a winding wound on it and a rotor with magnets. Magnets of the rotor are made of different materials which have different energy values. Thickness of a strong magnet is less than thickness of weak magnets.
EFFECT: reduced growth of material costs of manufacture of magnets, improved torque and increased power of electric motor.
8 cl, 5 dwg
FIELD: electrical engineering; mechanical design of permanent-magnet excited synchronous machines.
SUBSTANCE: proposed compensated and permanent-magnet excited split-phase generator has two stators identically disposed on its longitudinal axis and two rotors disposed on generator center line; novelty is that stators have salient poles with stator windings placed about them; stator pole size along internal circumference of stators and size of rotor poles along rotor external surfaces is 90 electrical degrees, rotors being shifted relative to one another around axis of revolution by 90 electrical degrees; rotor poles are permanent magnets; stators and rotor backs are made of thin-sheet electric steel and covered with insulation.
EFFECT: simplified mechanical design of split-phase generators.
1 cl, 2 dwg
FIELD: automotive industry; steering systems of automobiles.
SUBSTANCE: invention is designed for reducing effort on steering wheel. Stator of electric motor is provided with magnetic circuit with n salient poles and rotor, with n-2 poles in form of permanent magnets. Three-phase winding of stator contains coils arranged in six equally alternating phase zones, one coil for pole, several coils belonging to one phase in each phase zone. Winding coils in phase zones belonging to one phase are connected In parallel aiding. Inlet and outlet shafts arranged in booster housing are interconnected by torsion bar being sensitive element of torque sensor and coupled with steering wheel and steering mechanism by other ends. Rotor of electric motor is installed on outlet shaft. Stator winding controllable supply, rotor position pickup and control unit are provided. Inputs of the latter are connected with outputs of torque sensor and rotor position pickup, and output is connected to control input of said supply source. Group if inventions makes it possible to improve manufacturability of electric motor and steering booster as a whole.
EFFECT: improved operating characteristics, safety and comfortability of steering.
5 cl, 3 dwg
FIELD: electric engineering and electric-mechanical engineering, in particular - constructions of rotors for high-speed electric machines.
SUBSTANCE: rotor of high-speed electric machine contains yoke 1 with permanent magnets 2 positioned thereupon, on which polar end pieces 3 are mounted. Yoke 1 is made in form of evenly alternating magnetic and non-magnetic circular plates 4,5. on external and internal surface of polar end pieces 3 concentrically to rotor axis internal and external circular grooves are made. Internal circular grooves are mounted on external rings 6, connected by links to non-magnetic plates 5. by selecting relation between number of external and internal circular grooves it is possible to provide for optimal thickness of measuring portion of yoke 1 and its radial size. Due to decreased loads of polar end pieces 3 and bandage 7, achieved by making circular and linear slit grooves 10 on external surface of polar end pieces, mechanical durability and operational reliability of device are increased.
EFFECT: improved reliability of presented rotor by increasing its mechanical durability and manufacturability.
5 cl, 4 dwg
SUBSTANCE: power transmission mechanism 80 coupled handbar 51 with skis 12. First lever mechanism 801 comprises first rotary shaft 52 and second rotary shaft 82 coupled by first rod 81 and fitted on different axles. Second lever mechanism 80b is arranged between second rotary shaft 82 and ski 12. Steering drive booster 60 is mounted on second lever mechanism 80b and integrated therewith, and has drive motor operated in compliance with turn of second rotary shaft 82 coupled with booster rotary shaft 63 to make its output extension.
EFFECT: reduced stiffness of first lever mechanism, hence, its weight.
5 cl, 4 dwg
SUBSTANCE: motor reduction gear is fixed on base part (50) and has screw (40) which is actuated by drive gear located on it. Drive gear (42) is rotated by actuating element (500) of drive assembly (20). Device (30) functionally interconnects actuating element (500) and drive gear (42). Drive assembly (20) is flange mounted to the device (30). Drive gear (42) is mounted on holder on supports. Holder is fixed on base part (50) and serves as carrying element for the said device (30). The holder has one radial hole via which actuating element (500) of drive assembly (20) and drive gear (42) are interconnected. Assembly method consists in the following: at first, the first main unit is assembled and separately - the second main unit (3), then the first and the second (3) main units are joined. The first main unit consists of screw (40), drive gear (42) and holder, and the second main element - of actuating element (500), drive assembly (20) and the device (30).
EFFECT: simplification of motor reduction gear assembling due to simplification of design and reduction of necessary parts quantity.
9 cl, 5 dwg
FIELD: automotive industry.
SUBSTANCE: proposed electromechanical booster comprises housing accommodating two aligned input and output shafts, three-phase motor, stator magnetic core built in booster housing, rotor magnetic core and pickup of moment. Stator magnetic core features salient poles with coils, one coil per one pole. Said coils are arranged in six alternating phase zones. Rotor multi-pole magnetic core features (n-2) poles with excitation from tangentially arranged permanent magnets with their like poles adjoining rotor poles. Moment pickup represents a torsion and torsion angle metre. The former is arranged inside chamber formed by aforesaid input and output shafts. Additional magnetic core is fitted on motor rotor opposite the air gap, via non-magnetic gap comparable with said air gap.
EFFECT: higher efficiency and reliability, improved ergonomic properties.
FIELD: automotive industry.
SUBSTANCE: proposed method consists in turning every wheel, its position on vehicle selecting the track, about vertical axis, displaced from static center of the wheel spot of contact with horizontal bearing surface, through 180° in crosswise direction. Proposed device comprises loading bearing structure with device designed to support actual load, power supply, system to control at least one front and two rear wheels. Rear wheels are arranged to be independently driven about vertical axis. Vertical axes of turn of at least the wheels that define vehicle track are displaced from static centers of spots of wheels contact with horizontal bearing surface in crosswise direction. Wheels turn drives and vehicle design allow the wheels to turn through 180°.
EFFECT: improved operating performances, higher mobility.
7 cl, 10 dwg
FIELD: automotive industry.
SUBSTANCE: invention relates to automotive industry, particularly to steering systems. Steering device comprises actuator to boost steering made by steering wheel, steering wheel steering moment pickup, device to determine time of steering wheel back travel to boost steering during wheel back travel, device to control drive and actuator in response to time of wheel back travel determined by aforesaid device. Said time of wheel back travel decreases with increasing absolute steering moment determined by steering moment pickup.
EFFECT: improved steering on turning steering wheel.
6 cl, 5 dwg
FIELD: automotive industry.
SUBSTANCE: in compliance with first and second versions, proposed device incorporates gadget determining turn angle, and gadget varying amplification factor to change feedback amplification factor. In compliance with second version, proposed device additionally comprises gadget to determine steering-wheel turning rate and amplification factor variation regulator. In compliance with third version, proposed device incorporates gadget to determine vehicle speed, that to determine steering wheel torque caused by steering wheel, gadget to determine motor purpose current, gadget to vary feedback amplification factor, and amplification factor variation regulator. In compliance with fourth and fifth versions, device includes gadget to determine steering wheel torque caused by steering wheel, that to determine vehicle speed, gadget to determine purpose regulation amount, gadget to determine steering-wheel turn angle, and gadget to vary feedback amplification factor. In compliance with fourth versions, device additionally comprises gadget to determine current variation rate. In compliance with fifth versions, device additionally comprises amplification factor variation regulator.
EFFECT: suppressing noise caused by operation of device facilitating steering.
13 cl, 33 dwg
FIELD: mechanical engineering.
SUBSTANCE: invention relates to mechanisms of shafts locking for devices of steering control with electric drive. Shafts locking mechanism contains the first connecting frame, connected to rotating shaft, the second connecting frame, connected to steering shaft, operating as rotating shaft and couple of elements for rotation transfer. Mentioned couple of components, which is located between rotating shaft and steering shaft by means of both connecting frames, is provided for rotation transfer from rotating shaft to steering shaft. Couple of element for rotation transfer is adjusted so that they would develop retaliatory reaction in the form of strength of the first component, either in the form of resistance of both mentioned elements depending on value of relative rotation, which either less than fixed value, or equal or more than fixed value in the direction around axis between two rotating shafts. The second element for rotation transfer allows rigidity either less, or more, than rigidity of the first component, depending on value of relative rotation, which is either less, than fixed value, or equal or more, than fixed value in the direction around axis between two rotating shafts.
EFFECT: decision is directed to prevention of lost motion during prolonged period of time, increasing of mechanism wear resistance and improvement of manageability of car.
11 cl, 33 dwg
FIELD: electrical engineering.
SUBSTANCE: invention relates to electrical engineering, particularly to electrical machines and can be used as a motor in steering wheel boosters of automobiles and low and medium power electric generators. To achieve this outcome, the proposed permanent magnet motor consists of a cylindrical ferromagnetic external rotor, comprising a shaft, a nonmagnetic disc on the shaft and a magnetically conductive cylinder, on the inner surface of which permanent magnets are placed parallel the axis of the rotor. The said motor also has a cylindrical inner stator, placed in line with the rotor. According to this invention, in the magnetic system of the rotor, magnets on the length of each pole are divided into two parts and displaced from each other around the rotor by an angle Δα/2, where Δα=360°/n, where n is the pulse number of magnetic flux in one cycle of the rotor.
EFFECT: easier control of the motor through reduction of tooth ripples of electromagnetic torque.
2 cl, 4 dwg
FIELD: transport engineering.
SUBSTANCE: invention relates to electromechanical systems of vehicles designed for steering gears to reduce control forces on steering wheel. Proposed device includes inverter connected with three-phase synchronous motor and microprocessor inverter control unit. Inputs of the latter are connected through interface units with electric motor rotor position, speed and through pickups and tachometer. Resistance current sensor in inverter supply circuit and inverter current metering unit are provided, output of the latter is connected directly with signal input of inverter control unit, and inverter temperature-sensitive element is provided being made in form of thermoresistor and connected to protective input of inverter control unit. Said units are arranged in housing provided with cover and installed in power compartment of automobile, being arranged on four-layer printed-circuit board fixed inside housing. Mounted on side of plate pointed to housing are heated current sensor, inverter temperature-sensitive element and power transistor module. These devices are potted with heat-conducting compound. Mounted on side of plate pointed to cover are other elements of inverter, inverter control unit, interface units, inverter supply control unit, inverter current metering unit and four connectors. Two connectors are designed to supply power from storage battery and to connect outputs of speed meter and tachometer to interface units, and two others are designed for taking off three phase voltage from inverter to electric motor and to connect signal and supply circuits of torque and electric motor rotor position pickups to interface units. Heavy current conductors are made in form of layer-by-layer paths of plate contacting in heat-conducting compound.
EFFECT: improved mass and dimensions characteristics, increased operation reliability.
2 cl, 4 dwg
FIELD: transport engineering.
SUBSTANCE: invention relates to components of electromechanical steering booster and it is designed for decreasing force on steering wheel when maneuvering at slow speed and turning wheels at standstill of vehicle. Base is used to fasten to rotor of electric motor. Signal processing microcircuit is arranged on one side of first printed-circuit board, and on other side, spring-loaded current collectors are installed. Metering unit is formed by torsion bar connecting output and input shafts of electromechanical steering booster and resistance strain gauge bridge. Metering unit has wire communication with signal processing microcircuit. Cylindrical case PLUS and MINIS supply terminals and output terminal of device. Second printed-circuit board is rigidly fastened by one side to flat surface of case, and by other side it contacts with current collectors of first printed-circuit board by conducting concentric paths on printed-circuit board connected with said terminals of case. Through holes for torsion bar are made in centers of base, first printed-circuit board, flat surface of case and second printed-circuit board. Base is provided with at least two catches at both sides of hole for torsion bar. First printed-circuit board is rigidly attached to base. Catches of base are designed for connection with case. Case, together with base, forms movable system executing axial rotation of base relative to case through unlimited angle. Invention simplifies design of sensor by excluding wiring board and liable to wear and ageing contact connection between first printed-circuit board and base. Moreover, sensor is insensible to large allowances in manufacture of parts.
EFFECT: improved operation reliability of sensor and entire electromechanical steering booster.
3 cl, 2 dwg
FIELD: transport engineering.
SUBSTANCE: invention relates to servos of vehicle steering systems. Proposed steering booster has housing, steering shaft consisting of inlet and outlet parts, torsion bar connecting parts of steering shaft, drive, reduction gear with drive shaft and two opposite rotation toothed pairs with constant external meshing connected with output part of steering shaft for each direction of steering wheel turning through one of two clutches. Both parts of steering shaft are made in form of screw pair. Input part of steering shaft is made in form of screw, and its output shaft, in form of nut freely fitted in housing for axial displacement. Clutches are of friction type.
EFFECT: provision of stepless connection of drive to output part of steering shaft, improved reliability of steering booster.
6 cl, 1 dwg