Dual feedback mixed magnetic pole permanent magnetic motor

Abstract

A double-feed composite magnetic pole permanent-magnet electric motor belongs to the technical field of electric motors. The electric motor comprises a stator core installed in a machine housing, a stator comprising a machine winding, a rotor provided with a magnetic pole, a rotating shaft and a stator core; the machine winding comprising a main winding and a harmonic wave control winding and distributed in a stator groove; the magnetic pole of the rotor, which comprises a permanent magnetic pole and a ferromagnetic pole; the winding is arranged on the rotor, and number of poles of the main winding is equal to that of the rotor; the number of poles of the harmonic wave control winding is equal to that of the ferromagnetic pole; the double-feed composite magnetic pole permanent-magnet electric motor has the advantages of simple structure, high reliability, high power density of the electric motor, low voltage waveform distortion factor, no axial magnetic circuit and additional air gap, short magnetic circuit, small excitation loss and high efficiency, therefore, the optimization design of magnetic circuit distribution and the machine winding is facilitated; the two-way control of increasing and reducing magnet is achieved for the harmonic control winding current, high capacity to adjustment of magnetic field is provided, and the electric motor is ensured to meet the requirement for wide range of the running speed.

Description

technical field [0001] The invention belongs to the technical field of motors, in particular to a hybrid excitation permanent magnet motor. Background technique [0002] my country is rich in rare earth resources, and the development and application of permanent magnet energy-saving motors has great strategic significance. The permanent magnet synchronous generator is excited by permanent magnets, which eliminates the excitation loss of the electric excitation synchronous motor, and eliminates the mechanical contact device. It has the obvious advantages of simple structure, reliable operation, high power density and high efficiency. However, the difficulty in adjusting the permanent magnet magnetic field inherent in permanent magnet motors has become a bottleneck in its application and promotion in generators. In the hybrid excitation synchronous motor, there are both permanent magnet poles and excitation windings, and two magnetic potential sources exist at the same time, ...

AI Technical Summary

Problems solved by technology

However, this kind of motor is essentially a combination of a general permanent magnet generator and an electric excitation generator. Its structure is complex, and its electric excitation efficiency, material utilization rate and power density are not high.

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