Permanent magnet speed regulation automobile driving electric motor

Abstract

The invention provides a permanent magnet speed regulation automobile driving electric motor which is provided with a rotating shaft, a rotor iron core, a rotor magnetic steel member, a wire coil, a stator iron core and a casing that are all order arranged from an inner layer to an outer layer; the rotor iron core consists of a plurality of overlapping rotor punching sheets, the rotor punching sheets comprise rotor punching sheet bodies and magnetic steel grooves arranged on the rotor punching sheet bodies; each magnetic steel groove comprises a central groove, a magnetic steel spigot groove, a first extending wing groove and a second extending wing groove that are all communicated with each other. On one hand, in the permanent magnet speed regulation automobile driving electric motor, a magnetic flux leakage coefficient can be effectively reduced via the rotor punching sheets, magnetic steel demagnetization risk can be reduced, great mechanical performance can be realized, electric motor efficiency can be improved, electromagnetic noise can be lowered, a starting current can be reduced, and torque and limit speed of the electric motor can be increased. On the other hand, design of magnetism isolating bridges on the rotating punching sheets can help effectively prevent two ends of the magnetic steel member can be prevented from being magnetically short-circuited.

Description

Technical field [0001] The invention relates to a permanent magnet motor, in particular to a permanent magnet speed regulating automobile drive motor. Background technique [0002] The motor is mainly composed of a rotor part and a rotor part, and the rotor is formed by stacking each rotor punching piece. The rotor punching piece is a key component in the motor, and its inner and outer circle size, slot size, and size have a direct impact on the efficiency of the motor. At present, automobile motors on the market cannot achieve higher efficiency, better reliability and higher limit speed. And there are defects such as large electromagnetic noise and small torque. The efficiency of the motor is closely related to the flux leakage coefficient of the rotor punch. If there is no magnetic separation bridge or the magnetic separation bridge is too wide, part of the excitation magnetic flux generated by the permanent magnets in the magnetic steel channel will be short-circuited, whic...

AI Technical Summary

Problems solved by technology

If there is no magnetic isolation bridge or the magnetic isolation bridge is too wide, part of the excitation flux generated by the permanent magnets in the magnetic steel slot will be short-circuited, so that useful work cannot be done through the main magnetic circuit, reducing the efficiency of the motor

However, in the prior art, the design of the magnetic steel slots and magnetic isolation bridges of the rotor punching sheet is single and the magnetic flux leakage coefficient is large.

In order to reduce the flux leakage coefficient, if the width of the magnetic isolation bridge of the rotor punching sheet in the prior art is reduced, the mechanical performance will be greatly reduced.

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