Magnetism-gathering-type magnetic flux switching permanent magnet memory motor

Abstract

The invention discloses a magnetism-gathering-type magnetic flux switching permanent magnet memory motor, which comprises a stator, a rotor (2) and an un-conducted magnetic shaft (8), wherein the stator (1) is arranged outside the rotor (2); the rotor (2) is fixed on the un-conducted magnetic shaft (8) and is in a salient pole type; the stator comprises a stator core (1), a first permanent magnet (3a), a second permanent magnet (3b), a three-phase armature winding (6), a first pulsed winding (4a) and a second pulse winding (4b); the stator core (1) comprises a plurality of stator yokes and stator teeth protruding to the center direction of the stator core from the stator yokes; and a stator slot is formed between the adjacent stator teeth. With the adoption of the magnetism-gathering-type magnetic flux switching permanent magnet memory motor, the residual magnetization of the permanent magnet is adjusted through applying pulse current to a pulse winding; a motor no-load air-gap field can be adjusted; the weak magnetic ability of the motor and the rotating speed operation range are improved; and meanwhile, the torque and power density of the motor can be effectively improved through magnetism-gathering-type armature teeth, and the copper loss of the motor is reduced.

Description

technical field [0001] The invention relates to an adjustable magnetic flux permanent magnet motor, in particular to a novel magnetic flux switching permanent magnet memory motor, which can improve the magnetic field weakening capability of the motor, is suitable for wide speed regulation operation occasions, and belongs to the technical field of motor manufacturing. Background technique [0002] In the field of motors, due to the inherent characteristics of ordinary permanent magnet materials (such as NdFeB), the air gap magnetic field in the motor is basically kept constant, and the range of speed regulation is very limited when operating as an electric motor. The application of wide-speed adjustable direct drive applications such as electric vehicles and aerospace is limited to a certain extent. Therefore, the adjustable flux permanent magnet motor aimed at realizing the effective adjustment of the air gap magnetic field of the permanent magnet motor has always been a hot ...

AI Technical Summary

Problems solved by technology

However, this kind of motor has two magnetic potential sources at the same time, and the magnetic fluxes of the two are easy to couple and influence each other, which increases the complexity of the electromagnetic characteristics of the motor, and has weaknesses such as increased excitation loss and difficulty in implementing the excitation current control system.

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