Switched reluctance motor for electric automobile

Abstract

The invention discloses a switched reluctance motor for an electric automobile. Stator teeth are composed of branch excitation teeth and auxiliary teeth which are equal in number and are arranged in astaggered mode; a V-shaped groove is formed in the middle of the inner end plane of each branch excitation tooth; a V-shaped opening is aligned to the center of a rotor sleeve; each branch excitationtooth is divided into two same branch teeth by the V-shaped groove; the non-branch part between each branch tooth and a stator yoke is a branch tooth yoke part; a winding is wound on the branch toothyoke part; and a plurality of block rotors are uniformly arranged on the outer wall of the rotor sleeve in the circumferential direction. By virtue of the switched reluctance motor, the excitation teeth are arranged to be of a branch structure, so that the problem that the local magnetic density between teeth is too high is solved; a local position saturation phenomenon of the teeth can be reduced at the maximum inductance position; the maximum inductance value is increased under the same excitation condition, and then the output torque and efficiency of the motor are improved; and the branchexcitation teeth, the auxiliary teeth and the block rotors are combined, so that the excitation loop is further shortened.

Description

technical field [0001] The invention belongs to the technical field of motor manufacturing and application, in particular to a switched reluctance motor suitable for electric vehicles. Background technique [0002] Due to the double salient pole structure of the stator and rotor of the traditional switched reluctance motor, the torque ripple and vibration noise are relatively large during operation, and the double salient pole structure of the stator and rotor makes the wind resistance of the rotor large during high-speed operation. These shortcomings have become traditional It is one of the difficulties and bottlenecks in the promotion and application of switched reluctance motors in the field of electric vehicles. To solve this problem, a switched reluctance motor with block stator and rotor structure is adopted, and the stator is divided into excitation teeth and auxiliary teeth. The obvious defect of this type of motor is that: when the motor is at the position of maximu...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of excessive local magnetic density between the teeth of the existing switched reluctance motor, and propose a switched reluctance motor for electric vehicles, which shortens the excitation circuit, improves the utilization efficiency of the motor magnetic circuit, and reduces the magnetic flux density. Leakage, effectively improve the output torque of the motor under the same input power

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