Hybrid Excitation Permanent Magnet Motor with Dual Field Windings

Abstract

A hybrid excitation permanent magnet motor with double excitation windings comprises a case, a stator core, stator armature windings, permanent magnets, a rotating shaft, a rotor core, and rotor windings. The stator armature windings are distributed in stator slots. The rotor core is equipped with permanent-magnetic poles and ferromagnetic poles. The rotor windings are composed of de-excitation excitation windings and operation excitation windings. The de-excitation excitation windings sleeve the bodies of the permanent-magnetic poles, and the operation excitation windings sleeve the bodies of the ferromagnetic poles. The de-excitation excitation windings and the operation excitation windings are respectively connected with two excitation control systems. Compared with the prior art, the hybrid excitation permanent magnet motor of the invention has two sets of excitation windings, has the ability of wide-range air-gap magnetic field adjustment and excitation functions including normal excitation, strong excitation, reduced excitation and de-excitation, has a structure similar to that of an ordinary permanent magnet synchronous motor, has neither axial magnetic circuit nor additional air gap, and has high power density and operation efficiency.

Description

technical field [0001] The invention belongs to the technical field of motors and relates to a permanent magnet motor. Background technique [0002] In the hybrid excitation permanent magnet motor, there are permanent magnetomotive force and electric excitation magnetomotive force at the same time. Usually the permanent magnet magnetomotive force plays a leading role, and the electric excitation magnetomotive force plays an auxiliary role. While fully ensuring the high efficiency advantages of the permanent magnet motor , to solve the problem of adjusting the air gap magnetic field of permanent magnet motors. At present, there are nearly 30 hybrid excitation permanent magnet motor schemes proposed by experts and scholars at home and abroad. In these hybrid excitation permanent magnet motor schemes, the electric excitation windings can realize normal excitation, strong excitation and de-excitation functions. However, when a fault occurs inside the hybrid excitation permanent...

AI Technical Summary

Problems solved by technology

However, when a fault occurs inside the hybrid excitation permanent magnet motor, due to the existence of permanent magnets, how to realize its demagnetization function, most of the existing hybrid excitation permanent magnet motor solutions have not been considered in design

Images