Permanent-magnet hybrid magnetic circuit drive motor of electric vehicle

Abstract

The invention provides a permanent-magnet hybrid magnetic circuit drive motor of an electric vehicle, and belongs to the technical field of vehicle motor electric appliances. The permanent-magnet hybrid magnetic circuit drive motor of the electric vehicle is composed of a front end cover, a rear end cover, a motor case, a rotor and a stator. Tile permanent magnet steel is fixed to a rotor iron core through a screw via a pole shoe, and rectangular permanent magnet steel is embedded into the rotor iron core, so that a rotor magnetic bypass structure is achieved, the permanent magnet steel is effectively prevented from generating irreversible demagnetization under over-high temperature or under the armature reaction action of impact currents, and the permanent magnet steel does not lose magnetism. A rotor magnetic field of the drive motor is provided by a radial magnetic field and a tangential magnetic field together, the intensity of the magnetic field is large, the output power is high, no electro-magnetic winding is needed, power consumption is little, no carbon brush or mechanical commutator is provided, the failure rate is low, and the permanent-magnet hybrid magnetic circuit drive motor has the advantages of being high in efficiency, high in power density, compact in structure, reliable in working and the like.

Description

technical field [0001] The invention provides a permanent magnet hybrid magnetic circuit drive motor for 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 cons...

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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