Built-in permanent magnet rotor driving motor of electric automobile

Abstract

The invention provides a built-in permanent magnet rotor driving motor of an electric automobile, and belongs to the technical field of automobile motor appliances. The built-in permanent magnet rotor driving motor comprises a front end housing, a rear end housing, a shell, a rotor and a stator, wherein permanent magnet steel is embedded in a rotor core, and the structure is a rotor magnetic bypass structure which can effectively prevent an irreversible demagnetization problem of the permanent magnet due to ultrahigh temperature or an armature reaction of impulse current, ensure that the permanent magnet steel is free from loss of excitation. The rotor field of the driving motor is provided by the permanent magnet steel, so that the built-in permanent magnet rotor driving motor is free from electric exciting windings, carbon brush and a mechanical rectifier, low in power consumption and failure rate, high in efficiency and power density, obvious in magnetic flux gathering effect, and capable of providing large enough power for the electric automobile.

Description

technical field [0001] The invention provides a permanent magnet rotor drive motor embedded in an electric vehicle, which belongs to the technical field of automobile motors and electrical appliances. Background technique [0002] At present, most of the driving motors used with electric vehicles are DC motors with carbon brushes and mechanical commutators. Although DC motors have simple structure, high controllability, wide speed range, relatively simple control circuit, and low cost, but Since the magnetic field of the DC drive motor is generated by the electric excitation winding, the power consumption is large and the output power is small. In addition, due to the existence of carbon brushes and mechanical commutators, it not only limits the improvement of the overload capacity and speed of the drive motor, but also if it runs for a long time, it is bound to Frequent maintenance and replacement of carbon brushes and commutators is required, so the DC motor consumes a lot...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the driving motors used with electric vehicles are DC motors with carbon brushes and mechanical commutators. Although DC motors have simple structure, high controllability, wide speed range, relatively simple control circuit, and low cost, but Since the magnetic field of the DC drive motor is generated by the electric excitation winding, the power consumption is large and the output power is small. In addition, due to the existence of carbon brushes and mechanical commutators, it not only limits the improvement of the overload capacity and speed of the drive motor, but also if it runs for a long time, it is bound to Frequent maintenance and replacement of carbon brushes and commutators is required, so the DC motor consumes a lot of energy and has a high failure rate, and its performance needs to be further improved

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