Hybrid winding doubly-salient rare earth-free motor for new energy automobile, and control strategy thereof

Abstract

The invention relates to the technical field of motors, and provides a hybrid-winding doubly-salient rare-earth-free motor for a new energy automobile, and a control strategy thereof. The hybrid-winding doubly-salient rare-earth-free motor specifically comprises an E-type modular outer stator part with an annular winding, an E-type modular inner stator part with a concentrated winding, and a rotor part with staggered salient poles at two sides. Each of the E-type modular outer stator and the E-type modular inner stator comprises three teeth, and the width of the middle tooth is larger than that of the teeth on the two sides and smaller than two times of that of the teeth on the two sides; the staggered angle of the salient poles on the two sides of the rotor is smaller than the rotor period; and during working, working time of four modes of independent working of the outer stator part, independent working of the inner stator part, alternate working of the inner stator part and the outer stator part and joint working of the inner stator part and the outer stator part is adjusted in order, and stable control operation of the motor is achieved. According to the motor, the system power density, the torque output capability and the heat dissipation capability can be improved, and the motor has good engineering application value.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a hybrid-winding double-salient-pole rare-earth-free motor for new energy vehicles and a control strategy thereof. Background technique [0002] The motor system is a key link in the "three vertical and three horizontal" research layout of new energy vehicles, and its performance directly affects the ride comfort and operating safety of new energy vehicles. [0003] Double-salient rare-earth-free motors have the advantages of simple structure, low manufacturing cost and strong fault tolerance, and have become an important choice for new energy vehicle drive motor systems. However, due to the rare-earth-free feature and doubly salient pole structure, doubly salient pole-free rare earth motors also have disadvantages such as low power density and large torque ripple. Doubly salient rare-earth-free motors can effectively increase power density, increase output torque, and reduce vib...

AI Technical Summary

Problems solved by technology

However, due to the non-rare-earth characteristics and doubly salient pole structure, doubly salient pole-free rare earth motors also have disadvantages such as low power density and large torque ripple.

Doubly salient rare-earth-free motors can effectively increase power density, increase output torque, and reduce vibration and noise, but compared with traditional doubly salient rare-earth-free motors, there are more complex magnetic field coupling, power coupling and temperature fields between phases Coupling effects, these coupling effects will deteriorate the torque ripple, fault tolerance and thermal stress of the motor system of new energy vehicles, reduce the reliability and safety performance of the system, thus affecting the further promotion of new energy vehicles driven by rare earth motors

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