Claw pole permanent magnet and electromagnetic hybrid excitation generator rotor production method

Abstract

The invention provides a production method of rotors of a claw pole permanent magnet and electromagnet mixed excitation generator and belongs to the technical field of automotive electrical machines and electric appliances. The production method comprises permanent magnet rotor production, electro-magnetic rotor production and rotor assembly. The claw pole of a permanent magnet rotor converts an axial magnetization type magnetic field into a radial magnetic field, magnetic performance is good, and magnetization is uniform. An electro-magnetic rotor is of a salient pole structure, the magnetic field generated by the electro-magnetic rotor faces an air gap directly, leakage flux is low, and the utilizing rate of the magnetic field is high. The magnetic field in the air gap of the generator is provided by permanent magnet steel and electro-magnetic coils together, adjustment of the magnetic field formed after the permanent magnetic field and the electromagnetic field are combined is achieved by adjusting the intensity and direction of currents of the electro-magnetic coils, the output voltage of the generator is stable, and the safety and using reliability of the automotive electric appliances are guaranteed.

Description

technical field [0001] The invention provides a method for producing a claw pole permanent magnet and electromagnetic hybrid excitation generator rotor, which belongs to the technical field of automobile motors and electrical appliances. Background technique [0002] At present, the production method of the permanent magnet generator rotor used in automobiles is to assemble the shaft and a full cylindrical permanent magnet, and then magnetize the cylindrical permanent magnet in a radial direction to form a permanent magnet with N poles and S poles arranged at intervals. Magnetic rotor, during the magnetization process, the magnetic molecules cannot be completely arranged in an orderly manner, the residual magnetic induction intensity is low, and because a part of the permanent magnetic material between the magnetic poles of the cylindrical permanent magnet does not work, the permanent magnetic material of the rotor with this structure The utilization rate is low, and because...

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Problems solved by technology

[0002] At present, the production method of the permanent magnet generator rotor used in automobiles is to assemble the shaft and a full cylindrical permanent magnet, and then magnetize the cylindrical permanent magnet in a radial direction to form a permanent magnet with N poles and S poles arranged at intervals. Magnetic rotor, during the magnetization process, the magnetic molecules cannot be completely arranged in an orderly manner, the residual magnetic induction intensity is low, and because a part of the permanent magnetic material between the magnetic poles of the cylindrical permanent magnet does not work, the permanent magnetic material of the rotor with this structure The utilization rate is low, and because the permanent magnet magnetic field is a constant magnetic field, the magnetic field cannot be adjusted, the output voltage is low at low speed, the output voltage is high at high speed, and the output voltage is unstable, resulting in damage to the electrical equipment of the car or shortening the service life. Performance needs further improvement

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