11 results about "Permanent magnet motor" patented technology

Apparatus and methods for providing and controlling a permanent magnet electro-mechanical device that functions as a motor or generator are disclosed. The electro-mechanical device uses control coils to steer magnetic flux of permanent magnets placed between stator segments. The control coils can be wound around the bridge of a stator segment, the poles of a stator segment or both. The electro-mechanical device can be single phase or multi-phase and can include controllers, sensors, a thermal/electrical insulating structure, or a reluctance gap. The stator poles are grouped and designed with an angular spacing that is based on the number of permanent magnets. The electro-mechanical device has a higher power density than conventional motors and generators and operates more efficiently, while operating at cooler temperatures.

Disclosed in the present invention is a tandem starter-generator construction that includes an induction motor-generator, a permanent magnet motor-generator and power transmission unit disposed adjacent to the motor-generators. The induction motor-generator is utilized predominantly as a motor to provide mechanical power at relatively high efficiency as a motor, and as a generator to provide electrical power during regenerative braking. The permanent magnet motor-generator is used predominantly as a generator for very high efficiency power conversion and to capture additional electrical power during regenerative braking to compensates for the regenerative energy captured at lower efficiency by the induction motor-generator. Accordingly, the tandem motor-generator construction disclosed herein overcomes the drawbacks of low efficiency of an induction motor-generator operating in regenerative mode and a permanent magnet motor-generator magnetic drag losses during periods of non-utilization at high speeds in order to improve fuel efficiency of a parallel hybrid vehicle.

A motor includes poles P having a remanence Mr of 0.9 T or more, a coercivity HcJ of 0.80 MA/m or more, and a maximum energy product (BH)_max of 150 kJ/m³ or more, which sets a center point Pc of the magnetic poles in a circumferential direction on a rotor outer circumferential surface to a maximum thickness t_max, wherein when a line connecting the Pc and a rotational axis center Rc is Pc-Rc, a straight line connecting an arbitrary point Px in the circumferential direction on the rotor outer circumferential surface and the Rc is Px-Rc, an apex angle of the lines Pc-Rc and Px-Rc is θ, a number of pole pairs is Pn, a circumferential direction magnetic pole end is Pe, and a magnetic pole end biasing distance ΔL_Pe of the circumferential direction magnetic pole ends Pe is α×t_max (α is a coefficient).

The invention relates to a direct-drive composite permanent magnet motor with a magnetic transmission and dual-stator structure. According to the direct-drive composite permanent magnet motor with the magnetic transmission and dual-stator structure, a novel permanent magnet motor with a dual-stator hollow-rotor structure and a magnetic gear transmission technology are integrated so as to directly realize the mutual conversion of electric energy and low-revolving-speed large-torque mechanical energy, and the novel direct-drive composite permanent magnet motor can be widely applied to the wind power generation, hydraulic power generation, electric automobiles, ship drive and the field of transmission of other industries needing direct drive. The direct-drive composite permanent magnet motor is characterized in that an integrated structure is formed in a manner that a disk-shaped magnetic transmission gear pair I and a dual-stator-structure permanent magnet motor II are combined, the variable-speed transmission of high-speed and low-speed mechanical kinetic energies is realized by using the magnetic transmission gear pair I with transverse magnetic fields, the electromechanical energy conversion is realized by using the dual-stator-structure permanent magnet motor II with radial magnetic fields, a magnetic circuit structure is of a closed magnetic circuit which is formed in a manner that an inner stator and an outer stator are directly connected between two hetero-polarity permanent-magnet poles of a hollow rotor in series, the inner stator, the outer stator and the rotor are of a radial concentric structure, and two air gaps exist.

The invention provides a stator magnetic circuit structure for an axial magnetic circuit permanent magnet motor, and belongs to the technical field of motors. The stator magnetic circuit structure for the axial magnetic circuit permanent magnet motor is suitable for characteristics of a magnetic circuit of the axial magnetic circuit motor, and has normal iron loss. A plurality of T tail grooves are formed in the outer peripheral surface of a ring-shaped stator yoke along the radial direction and are uniformly distributed along the outer periphery of the ring-shaped stator yoke; the number of the T tail grooves is the same with that of a plurality of stator tooth blocks; the widths and the heights of the T tail grooves are the same with those of T-shaped tooth tails on the stator tooth blocks; a stator tooth block is inlaid in each T tail groove; and the T-shaped tooth tail of each stator tooth block is in close fit with the corresponding T tail groove. On the axial magnetic circuit permanent magnet motor, the trend of tooth magnetic flux and the trend of yoke magnetic flux are consistent to a punching direction, and abnormal iron loss can be avoided.

The invention discloses nameplate information laser engraving equipment for permanent magnet motor production. The nameplate information laser engraving equipment comprises a laser engraving base, a horizontal transverse movement driving mechanism, a vertical driving mechanism, a laser engraving mechanism and a nameplate clamping and conveying mechanism. The horizontal transverse movement drivingmechanism is arranged on the laser engraving base, and the vertical driving mechanism is in driving connection with the horizontal transverse movement driving mechanism; the laser engraving mechanismis in driving connection with the vertical driving mechanism; the nameplate clamping and conveying mechanism is arranged on the laser engraving base; and the nameplate clamping and conveying mechanismis arranged below the laser engraving mechanism. According to the nameplate information laser engraving equipment for permanent magnet motor production, high-efficiency laser engraving of nameplatesis achieved, and meanwhile high-precision laser engraving of the nameplates is guaranteed.

The invention belongs to the field of aviation permanent magnet synchronous motor control systems, and discloses an AD2S1210-based aviation permanent magnet motor rotor position angle redundancy control system and method. The space vector control FOC algorithm unit is used for generating six paths of PWM (Pulse Width Modulation) waves to drive the three-phase bridge type inversion module to be switched on and switched off by collecting armature current, rotor position angle and rotating speed information of the permanent magnet synchronous motor and adopting a rotating speed and current double-closed-loop control strategy, so that the permanent magnet synchronous motor is controlled to reach a target rotating speed or torque; the AD2S1210 rotary transformer decoding chip is used for collecting rotor position angle information and rotating speed information of a rotary transformer coaxially installed on the permanent magnet synchronous motor. The rotor position angle information and the rotating speed information are decoded and then sent to the position angle redundancy control algorithm unit; and the position angle redundancy control algorithm unit is used for judging the received rotor position angle information, outputting a correct position angle signal to the space vector control FOC algorithm unit, converting the received rotating speed information and outputting the converted rotating speed information to the space vector control FOC algorithm unit.

The invention belongs to the technical field of motor cooling, and relates to a partner type direct liquid cooling structure for a permanent magnet motor. Cooling conduits and copper windings are arranged in stator slots of the motor, and each turn of centralized hybrid winding consists of two copper windings and two cooling conduits, is distributed in the stator slots in a diagonal manner, and is wound on stator teeth in parallel like a partner. And the partner type mixed winding is wound from the right side bottom groove of the stator tooth part to the left side groove in parallel, and after the partner type mixed winding is wound by one circle, the partner type mixed winding is staggered by a certain height at the end part of the stator iron core and then is wound by a second circle downwards. And after the first layer of partner-type mixed winding is wound, a second layer of partner-type mixed winding starts to be wound in parallel at the inclined shoulder of the stator slot, and after winding for one circle, the end part of the stator iron core is staggered by the same height and upwards wound for a second circle until the second layer is wound. According to the invention, the conduction rate of heat generated by loss to the outside can be enhanced, and the problem of difficulty in heat dissipation of the end winding can be solved.

The invention relates to the technical field of motors, and particularly discloses a permanent magnet motor rotor core and a motor. The permanent magnet motor rotor iron core comprises an iron core body and a plurality of magnetic steels, wherein the iron core body is provided with a plurality of magnetic pole units which are arranged at intervals along the circumferential direction of the iron core body; each magnetic pole unit comprises a V-shaped first magnetic steel groove, a V-shaped second magnetic steel groove and a U-shaped third magnetic steel groove, the first magnetic steel groove is arranged close to the outer edge of the iron core body, the third magnetic steel groove is arranged close to the center of the iron core body, and the second magnetic steel groove is arranged between the first magnetic steel groove and the second magnetic steel groove; and magnetic steel is arranged in each magnetic steel groove. According to the designed magnetic circuit, the magnetism gathering capacity of the motor can be improved, meanwhile, the salient pole ratio of the motor is increased, the reluctance torque of the motor is improved, then the torque density of a constant torque area and a weak magnetic area of the motor is effectively improved, and the air gap flux density waveform and the counter potential waveform can be improved. The magnetic circuit structure can flexibly arrange the position of the magnetic isolation bridge and effectively improve the limit rotating speed of the motor rotor.