Five-phase axial magnetic flux permanent magnet motor for electric vehicle

Abstract

The invention discloses a five-phase axial magnetic flux permanent magnet motor for an electric vehicle, which adopts a single-stator / double-rotor structure and consists of a stator and two rotors. The stator is of a back-to-back topology and comprises ten stator iron cores, ten aluminum-nickel-cobalt permanent magnets, twenty armature coils and twenty pulse coils, and the rotor is composed of fifty seven neodymium-iron-boron permanent magnets. The five-phase motor is good in fault tolerance performance, high in reliability and small in torque pulsation; the stator and rotor permanent magnet type axial doubly salient structure is short in axial length, compact in structure, small in size, high in power / torque density, high in back electromotive force sine degree and high in efficiency; the aluminum-nickel-cobalt permanent magnets on the stator are easy to realize magnetization and demagnetization, the air-gap magnetic field of the motor can be flexibly adjusted, the speed regulation range is widened, the loading capacity is enhanced, and the magnetism regulation efficiency is high; and the neodymium iron boron permanent magnets in a special arrangement form on the rotor can obtain a perfect sine air-gap magnetic field, reduce the harmonic content, and further improve the motor efficiency and the power density.

Description

technical field [0001] The invention belongs to the technical field of axial flux permanent magnet motors, in particular to a five-phase axial flux permanent magnet motor for electric vehicles. Background technique [0002] Axial flux permanent magnet motor has the characteristics of short axial length, simple and compact structure, small size, high efficiency, high power / torque density and high utilization rate of rotor core, which has attracted extensive attention and in-depth research from domestic and foreign scientific research institutions and enterprises. research and development. In 2011, domestic scholar M.Lin proposed a stator permanent magnet type axial field flux switching permanent magnet motor. The permanent magnet and winding are located in the stator, and the rotor has no permanent magnet and armature winding. This type of motor combines the characteristics of axial flux permanent magnet motor and flux switching motor, with short axial length, simple and com...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a five-phase axial flux permanent magnet motor for electric vehicles, which solves the problem of insufficient reliability of the stator permanent magnet axial flux permanent magnet motor, low magnetic modulation efficiency, and insufficient magnetic modulation range Wide, large torque ripple and other problems, to achieve high efficiency, high power density, high reliability, wide magnetic adjustment range, and strong stable operation of the motor

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