Permanent-magnet motor rotor core structure

Abstract

The invention discloses a permanent-magnet motor rotor core structure. The permanent-magnet motor rotor core structure comprises a rotor core, a rotor core support, a first permanent-magnet group, a second permanent-magnet group and a rotor shaft, wherein the rotor core is formed by laminating rotor punching sheets and comprises a first group of permanent-magnet grooves, a plurality of rotor coresand the rotor core support are combined and assembled to form a second group of permanent-magnet groove, the rotor core support is tightly connected with the rotor shaft, and the second permanent-magnet groove, the rotor core and the rotor core support form a centrifugal fan structure after the second permanent-magnet groove is assembled. By reliable installation of a permanent magnet of the permanent-magnet motor rotor core structure, a leakage magnetic phenomenon of the permanent magnet can be reduced, the iron core material and the magnetic material are saved, the cost of the whole motor is reduced, the permanent-magnet motor rotor core structure has high strength, the cooling effect of the motor is improved, and the internal temperature of the motor is reduced.

Description

technical field [0001] The invention relates to the technical field of permanent magnet motor core structure and rotor heat dissipation, in particular to a permanent magnet motor rotor core structure. Background technique [0002] In order to reduce the pollution emissions of urban vehicles and realize the development strategy of new energy vehicles, zero-emission electric buses have become the main force of new energy vehicles in cities. The drive system composed of motors as drive motors has very high cost performance and reliability. sex. Among them, permanent magnet motors are the main ones. [0003] The permanent magnet motor is excited by permanent magnets instead of coils, which not only saves a lot of copper and iron materials for making the motor, makes the whole machine smaller in size and lighter in weight, but also saves the power consumed by the excitation coil in operation, which is conducive to improving The electromechanical conversion efficiency of the mot...

AI Technical Summary

Problems solved by technology

In the process of patent implementation, the combination and lamination process of the first punch and the second punch is complicated, and the factory operation is difficult

In order to cut off the magnetic circuit for the first punching piece, the size of the main body and the inner ring of the punching piece must be reduced to increase the magnetic resistance, which increases the punching difficulty of the punching piece

Moreover, after the second punching sheet is stacked, when the rotor rotates at high speed, the centrifugal force it receives completely acts on the riveting interface of the first punching sheet, and the risk of the rotor falling apart is greater. At the same time, the rotor core structure designed by this patent is in the realization It is difficult, and the overlapping operation process of workers is complicated

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