Variable magnetic flux hybrid excitation permanent magnet vernier motor of electric automobile

Abstract

The invention discloses a variable magnetic flux hybrid excitation permanent magnet vernier motor of an electric automobile, belongs to the technical field of automobile electric appliances and comprises a stator core, an auxiliary winding, an armature winding, a shell, first permanent magnets, a shaft, second permanent magnets and a rotor, wherein the stator core is provided with 3X uniformly distributed main stator teeth and 3X auxiliary stator teeth, the auxiliary stator teeth are connected to the middle of the main stator teeth through a tangential connecting yoke to form h-shaped stator teeth with the main stator teeth, each stator notch is fixedly provided with a tangentially magnetized first permanent magnet, the middle of the outer circumference of the first permanent magnet is connected with the auxiliary stator teeth, and 2X pairs of uniformly distributed second permanent magnets are attached to the circumferential surface of the rotor; and each main stator tooth is wound with an armature winding, and each auxiliary stator tooth is wound with an auxiliary winding. The variable magnetic flux hybrid excitation permanent magnet vernier motor has the advantages that the auxiliary winding can realize controllable magnetic flux, the speed regulation range of the motor is increased to adapt to different operation conditions respectively, and the problem of serious heating ofthe stator core in the operation process of the motor can be effectively solved.

Description

technical field [0001] The invention relates to a variable magnetic flux mixed excitation permanent magnet vernier motor of an electric vehicle, which belongs to the technical field of automobile electric appliances. Background technique [0002] At present, the way to increase the low-speed output torque of motors used in automobiles is to increase the number of slots, windings and permanent magnet poles. For hybrid excitation motors, the purpose of low-speed and high-torque can also be achieved by increasing the excitation current. However, due to the saturation problem of the stator core and the limitation of the structural size of the motor, the output torque of the motor for automobiles is limited. [0003] In recent years, a permanent magnet vernier motor with high torque density based on the "magnetic gear effect" has attracted widespread attention in the field of motors. [0004] The traditional permanent magnet vernier motor has high energy density and high efficie...

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problem of heat generation of the stator core and complex control circuit of the traditional hybrid excitation permanent magnet vernier motor, the present invention proposes a variable magnetic flux hybrid excitation permanent magnet vernier motor that adopts an h-shaped stator tooth structure and does not need an excitation current control circuit.

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