Variable salient pole rate permanent magnet motor and design method thereof

Abstract

The invention discloses a variable salient pole rate permanent magnet motor and a design method thereof, the variable salient pole rate permanent magnet motor comprises a stator and a rotor, the rotor comprises a plurality of modularized independent rotor units (3), segmented and regional saturation of a rotor magnetic circuit is realized by means of differentiated rotor material attributes, quadrature-axis inductance is indirectly adjusted by adjusting armature current, and the salient pole rate of the rotor is improved. Therefore, the salient pole rate of the motor is changed. According to the invention, the reverse salient rate characteristic can be realized at a low speed, the torque output capability of the motor is improved, and the irreversible demagnetization risk of the motor is reduced; the positive salient pole rate characteristic is realized at a high speed, the reluctance torque is fully utilized, and the loading capacity of the motor at the high speed is improved.

Description

Technical field [0001] The present invention relates to a multi-restriction determinant permanent magnet motor and its design method thereof, belonging to motor technology, electric vehicles, electric tractor fields. Background technique [0002] In recent years, with the increasingness of environmental pollution and energy, the electric motor industry is in the like. With the increasingly complex road conditions, electric vehicles often face frequent stop, heavy-duty climbing, high-speed cruise and other operating conditions, to the high torque output capacity, high efficiency, wide-regulation of the vehicle motor, etc. Performance puts forward higher requirements. Permanent magnet motors have become the hotspots of experts from experts and scholars at home and abroad due to their high torque density, high power density, high efficiency, and often become the first choice for vehicle drive motor manufacturers. At present, all well-known manufacturers, Germany, Germany, USA, USA, ...

AI Technical Summary

Problems solved by technology

However, at high speed, in order to increase the speed, the torque output capability of this type of motor will be greatly reduced after the demagnetization current is added, which is not conducive to the load operation of the motor at high speed

[0003] Generally speaking, as far as the current methods and technologies are concerned, the vehicle drive motors currently researched all have a single salient pole characteristic, that is, the positive saliency rate motor or the reverse saliency rate motor, which is difficult to meet the high torque output requirements of the vehicle drive motor. , high efficiency, and wide speed regulation requirements, there is still a lack of a variable saliency ratio motor that can adapt to different working conditions and adapt to the saliency ratio under different working conditions

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