53results about How to "Small positioning torque" patented technology

The invention provides a six-phase flux switching type permanent magnet motor which comprises stators, rotors and a rotating shaft, wherein each stator adopts a permanent magnet double salient structure, that is, the permanent magnet, the stator core and the armature winding are arranged on each stator, the stator core is assembled by an U-magnetic core and each permanent magnet embedded in the magnetic core, and the permanent magnets are of tangential alternate magnetization; the armature winding is of six-phase armature winding arranged on the stator, the six-phase armature winding adopts centralization coils, and the rotors are made of permeability magnetic material; the magnetizing directions of the permanent magnets are of the tangential of the stator circle, and the magnetizing directions of two adjacent permanent magnets are opposite to each other; the number of the armature coil and the stator groove is even number times of the phase number; and each phase 2n coils winding, and n coils are distributed at the two ends of the diameter of the stator circle respectively. And two three-phrase winding can conduct independent power supplying and generating.

The invention discloses a multi-gear fault-tolerance permanent magnetism magnetic flux switching electric machine and a fault-tolerance method thereof, belonging to a permanent magnetism fault-tolerance electric machine and a method. The electric machine comprises a salient pole stator, an armature winding and a salient pole rotor. Stator salient poles are E-shaped stator iron blocks; bar-shaped permanent magnets are embedded into a gap between every two E-shaped stator iron blocks in sequence; and stator windings which are coils from a first coil to a sixth coil are wounded on two E-shaped arms connected with the bar-shaped permanent magnets. Since the method employs the multitooth fault-tolerance permanent magnetism magnetic flux switching electric machine, the self inductance of the armature winding is increased; when the multi-gear fault-tolerance permanent magnetism magnetic flux switching electric machine uses high-coercive force permanent magnets, the short circuit current if can be restrained within the rated current iL without considerably increasing the number of turns of the armature winding. The invention has high reliability; the armature magnetic field makes small impact on the permanent magnets; the multi-gear structures of the stator and the rotor of the electric machine enable the electric machine to have small mutual inductance, strong magnetism isolating capability, big electrical inductance, strong capability of restraining the short circuit current and reduced location torque.

The invention discloses a stator surface mounted doubly salient pole permanent magnet motor which has simple and firm structure, stronger torque output capacity and higher power density, comprises a stator (1) and a rotor (4), and is characterized in that the rotor (4) is positioned in the stator (1); the stator (1) and the rotor (4) are both in doubly salient pole structure; the stator (1) is provided with a concentrated winding (3) and a permanent magnet (2), wherein, each concentrated winding coil of any phase of the concentrated winding (3) is positioned in an iron-core groove of the stator (1), and each phase concentrated winding coil is in series connection or in parallel connection; the permanent magnet (2) is positioned on the top part of tooth of the stator (1). The motor has no-load counter-electromotive force of a high degree approximate square wave (a straight flute rotor) or a sinusoidal wave (a tapered slot rotor), stronger torque output capacity, higher power density andstronger anti-demagnetizing capacity, and is especially suitable for being used as a driving element of an alternating current governor system.

The present invention relates to a large-scale dual-rotor direct-drive permanent magnet wind power generator and a generating set thereof. The generator includes a stator and a rotor. The rotor is a dual-rotor structure including an outer rotor and an inner rotor; the stator is mainly composed of stator iron Core, outer ring group and inner ring group, the inner and outer ring groups correspond to the in-phase windings in anti-phase series; the stator is located between the outer rotor and the inner rotor, the outer rotor and the stator form the first working air gap, and the inner rotor and the stator form the second Two working air gaps, the first working air gap is connected in series with the second working air gap magnetic circuit. The generator set also includes a hub, a main shaft, a rotor turntable, a casing and a frame, and the stator is fixed inside the casing; the inner and outer rotors are connected and synchronized with the main shaft and the hub through the rotor turntable. The invention adopts a double-rotor ring winding structure, which greatly improves the torque power density of the motor, makes full use of the internal space of the motor, reduces the volume and weight of the motor, reduces the production cost, and facilitates transportation.

The invention relates to a brushless DC (Direct Current) motor for unmanned air vehicles, belonging to the technical field of unmanned air vehicle powerplants. The brushless DC motor comprises an external rotor composed of a rotor end cover, a rotor yoke and a permanent magnet, a stator composed of a winding, a stator iron core and a stator yoke, an upper bearing, a lower bearing, a rotation shaft and a stopper ring, wherein the outer diameter of the rotor yoke is the same as that of the rotor end cover, the rotor yoke is fixed at the lower end of the rotor end cover, the permanent magnet is fixed on the inner wall of the rotor yoke, and the number of magnetic poles of the permanent magnet is 24; the stator iron core comprises 18 slots, the stator yoke is sleeved on the inner wall of the stator iron core, and the winding is coiled on the outside of the stator iron core; the upper bearing and the lower bearing are respectively fixed on two ends of the rotation shaft; the stator is connected with the rotor through the rotation shaft, the stator is embedded inside the rotor end cover, and the stopper ring is sleeved on the rotation shaft. In the invention, by directly driving airscrews, the brushless DC motor is beneficial to elimination of efficiency loss of a driving system, and improvement of lift force/power consumption ratio and lift force/mass ratio of air vehicles.

Arrangement at an electric machine, particularly motor, generator, or actuator, with a stator with teeth (11, 12) carrying coils (15), particularly one layer, for concentrated windings. A permanent magnetic rotor is movable relatively to the stator (11, 12). The teeth of the stator are arranged for receiving coils (15) with generally rectangular opening. Advantages are achieved if the stator teeth (11, 12) are provided to receive generally identical coils (15) closing the grooves (14, 16). The teeth (11, 12) may be alternating rectangular and converging/diverging toward the top, to provide grooves (14, 16), with parallel sides to enter the coils (15). The converging teeth (22) have preferably a shortened top (23). The grooves are preferably provided to make room for a semi magnetic groove wedge (17, 18) between adjacent teeth.

The invention relates to a magnetic suspension bearing disc hybrid excitation doubly salient wind generator, and aims to solve the technical problem that an existing magnetic suspension wind generator system is too complicated in structure, high in energy consumption, inapplicable to small and medium fans and the like. The technical scheme includes that the magnetic suspension bearing disc hybrid excitation doubly salient wind generator comprises a rotor, two generator stators, two permanent magnet rings, three magnetic suspension bearing stators, fan blades and a rotor shaft, magnetic suspension bearing control windings are wound on the magnetic suspension bearing stators, the fan blades are mounted at one end of the rotor shaft, the rotor is mounted at the other end of the rotor shaft, the fan blades, the rotor and the rotor shaft synchronously rotate, the two permanent magnet rings are connected with the two generator stators respectively and further connected with the magnetic suspension bearing stators, the permanent magnet rings are embedded among the magnetic suspension bearing stators and the generator stators, the magnetic suspension bearing stators are uniformly distributed on the periphery of the rotor, the periphery of the rotor extends into the magnetic suspension bearing stators, and air gaps are reserved among the magnetic suspension bearing stators and two planes of the rotor.

This invention designs a stator surface-mounted doubly salient permanent-magnet motor with complementary winding magnetic paths, which comprises a stator (2) and a rotor (4), wherein the rotor (4) is located on the interior or exterior of the stator (1); the stator (1) is a salient pole structure and is provided with stator teeth (101) protruded out of a yoke part; armature winding slots (102) are formed between the stator teeth; the stator teeth (101) and the armature winding slots (102) are distributed in an alternation manner; integrated armature windings (2) and permanent magnets (3) are arranged on the stator (1), wherein the permanent magnets (3) are arranged on the stator teeth (101) and are located on an air gap between the stator (2) and the rotor (4); the integrated armature windings (2) are arranged on the stator teeth (101) of the stator (1); and the motor disclosed by this invention is simple and firm in structure and has strong torque output capacity and large power density.

The invention discloses an electric machine having in each case at least two clamping protrusions for attaching a permanent magnet. The present invention relates to a spoke rotor for an electric machine, having a main body which extends concentrically around an axis of rotation and which has a plurality of pole shoes, between which permanent magnets are arranged in holders, wherein there is provided for each permanent magnet in its holder in each case at least one first clamping element and one second clamping element, which fixes said permanent magnet in the holder, wherein the first clamping element fixes the permanent magnet in a radial direction relative to the axis of rotation and the second clamping element fixes it in a tangential direction relative to the axis of rotation, and wherein in each case a movement clearance is provided for each second clamping element. The present invention also relates to a clamping lamella, in particular for such a spoke rotor. The present invention also relates to an electric machine comprising such a spoke rotor. The present invention also relates to a device, in particular a hand-held power tool, an adjustment drive for a motor vehicle, a power steering system, a servo motor, an electromechanical brake booster or a vehicle drive, comprising such an electric machine.

The invention relates to a high-reliability half stator-tooth winded stator-surface mounted permanent magnet motor which comprises a stator (1) and a rotor (4). The rotor (4) is arranged inside or outside the stator (1). The high-reliability half stator-tooth winded stator-surface mounted permanent magnet motor is characterized in that: the stator (1) is in a salient pole structure and provided with stator teeth (1-1) which protrude from a yoke part; armature winding slots (1-2) are formed among the stator teeth (1-1), the stator teeth (1-1) and the armature winding slots (1-2) are distributed alternatively, the stator (1) is provided with a centralized armature winding (2) and permanent magnets (3), and only half of the stator teeth (1-1) are winded by armature winding coils and provided with the mounted permanent magnets so that half of permanent magnets is saved and the areas of the armature winding slots are increased. Only half of the stator teeth (1-1) are dotted with the permanent magnets (3), and the magnetizing directions of the permanent magnets (3) are same between the gap of the stator (1) and the rotor (4). The centralized armature winding (2) is arranged on the stator teeth (1-1) of the stator (1) provided with the permanent magnets. The high-reliability half stator-tooth winded stator-surface mounted permanent magnet motor has the advantages of simple and firm structure, strong torque output capacity, large power density and high reliability.

The invention relates to a bearing assembly for a machine table, which has a stator (01) and a runner (03) relatively supported to the stator, the bearing assembly has a roller bearing (05) and a magnet bearing (07) forcing the roller bearing by magnetic repulsive force to be removed. The magnet bearing (07) has a stator permanent magnetic group arranged on the stator (01) and a runner permanent magnetic group which is opposite to the stator permanent magnetic group and arranged on the runner (03), wherein, two opposite permanent magnetic groups are partitioned by an air gap (03), and have same magnetic poles at mutually faced side surfaces. The field strength equalizing units are provided, which compensate for the magnetic field strength fluctuations arising between the opposite permanentmagnetic groups in the movement of the runner.

The invention discloses an ultrahigh-power servomotor, which belongs to the field of servomotors. The ultrahigh-power servomotor comprises a stator and a rotor; the rotor is located in the stator; the central axis of the stator is superposed with the central axis of the rotor; a double-layer winding is wound in stator slots on the stator, so that the electromotive force of the motor is close to the sine-shaped winding; the distribution pattern of the winding on the stator is short-distance distribution; the rotor comprises a rotor shaft and steel magnets; the steel magnets are fixed on the periphery of the rotor shaft; the rotor shaft at which the steel magnets are fixed is of a non-cylindrical structure; the steel magnets are non-uniform-thickness steel magnets; the cross section of each steel magnet is shaped like a reaphook, and the magnetization method is parallel magnetization. The sinusoidality of the electromotive force of the ultrahigh-power servomotor disclosed by the invention is high, and the ultrahigh-power servomotor can realize low inertia, high rotational speed, short-time peak overload and other performance indexes under the condition of high specific power.

The invention discloses a method for reducing the locating moment of a permanent-magnet type motor of a stator based on an auxiliary groove of a rotor. The auxiliary groove is arranged on the rotor to increase upper harmonic component generated by magnetic conductance of an air gap tooth space, so that the fundamental frequency of the generated locating moment is increased, while the amplitude is correspondingly reduced. As the dimension of the auxiliary groove of the rotor is optimally designed, the idle load electric potential of the motor can be guaranteed when the locating moment is reduced, and the performance index such as torque output capability and the like can not be influenced. In the structure, the invention maintains the advantages of being compact and simple, good in robustness and suitable for high speed running of the permanent-magnet type motor of the stator; the volume of the motor is not needed to be additionally increased, and on the contrary, the magnet core quantity of the rotor can be reduced. Compared with other ways used for reducing the locating moment, the technical method is simple, convenient and effective, has low cost and is especially suitable for the permanent-magnet type motor of the stator, thus the type of motor has better application prospect in the fields such as a direct drive type aerogenerator, hybrid vehicle, etc.

The invention discloses a rotary electromagnetic heating device of a conical rotor, and belongs to the technical field of motor application. The rotary electromagnetic heating device solves the problem that in a traditional electromagnetic heating device, the temperature adjusting way is single and when external energy is low, the energy cannot be fully utilized. The axial cross section of the inner portion of a stator iron core of the rotary electromagnetic heating device of the conical rotor is in the shape of an isosceles trapezoid, the outer portion of the stator iron core of the rotary electromagnetic heating device of the conical rotor is columnar, the outer surface of a conical rotor iron core can be machined to have certain taper, and permanent magnets can also be used for maintaining the taper. The permanent magnets can be permanent magnets which are of a surface-mounted-type structure and can also be built-in-type permanent magnets. The magnetizing direction of the permanent magnets can be tangential and can also be radial. A pressure spring and a slidable pressing ring form an air gap adjusting mechanism, a shaft is connected with an external power device, and axial movement of rotors is realized through the conical rotor and the air gap adjusting mechanism, so that an air gap magnetic field is adjustable, and therefore the traditional electromagnetic heating device is improved and the temperature adjustable range of the traditional electromagnetic heating device is expanded. The rotary electromagnetic heating device of the conical rotor can be widely applied to the fields like heating and bathing.

A rare-earth permanent-magnet synchronous servo motor comprises a machine base, a stator, a rotor and a rotary shaft. The stator comprises a stator iron core and a stator winding, the stator iron core is formed by stacking stator punching sheets, the stator punching sheets are provided with stator punching sheet slots, and stator windings are arranged in the stator punching sheet slots. The rotor comprises a rotor iron core and rare-earth permanent magnets, the rotor iron core is formed by stacking rotor punching sheets, eight pairs of magnetic steel slots are uniformly circumferentially distributed on yoke portions of the rotor punching sheets, each pair of magnetic steel slots are radially symmetrically arranged in V shape, and the rare-earth permanent magnets are embedded in the steel magnetic slots. The rare-earth permanent-magnet synchronous servo motor adopting the structure of V-shaped magnetic loops with short-distance windings of fractional slots has the advantages of low loss, high efficiency, large starting torque, small size, light weight, high power density and the like, has the advantage that ultraharmonics and slot effect are suppressed by means of the windings of the fractional slots, and thereby having the advantages of low torque pulsation, small positioning moment, high balance accuracy, stable running, low noise and vibration, and the like.

The invention provides a servomotor for ETC and a control system thereof. The servomotor include a motor main body, the motor main body includes a housing, a rotor and a stator are arranged in the housing, the rotor has a rotating shaft and a magnet fixed on the rotating shaft for driving, and the stator has a stator core arranged on the outer periphery of the magnet and a winding for generating a rotating magnetic field. The inner diameter of the stator is in the range of 65-69 millimeters, the stator is provided with 10-14 stator grooves, the stator is formed by the lamination of stator punching plates; the rotor is an eccentric magnetic steel rotor of a surface-mounting structure, the rotor is provided with 7-9 rotor grooves, and the rotor is formed by the lamination of rotor punching plates; the outer diameter of each stator punching plate is in the range of 122-128 millimeters; the winding is a fractional groove concentrated winding; the torque ripple of the motor is reduced by the magnetic steel eccentricity, the zero-load back EMF waveform is optimized, so that the motor can work continuously, efficiently and smoothly.