A stator permanent magnet type axial field permanent magnet motor

Abstract

The invention relates to a stator permanent magnet type axial field permanent magnet motor, which comprises a first permanent magnet stator, a first rotor, an armature stator, a second rotor and a second permanent magnet stator arranged coaxially and sequentially. The magnetic stator and the second permanent magnet stator have the same structure and are arranged symmetrically; the first rotor and the second rotor have the same structure and are arranged symmetrically. Both the first permanent magnet stator and the second permanent magnet stator include a permanent magnet stator bracket, on which there are several permanent magnet stator cores uniformly distributed on the circumference, and between two adjacent permanent magnet stator cores High coercive force permanent magnet; the armature stator includes an armature stator support, and the armature stator support row is provided with a plurality of armature stator cores uniformly distributed on the circumference, and an armature winding is wound around the armature stator core. Locating the permanent magnet and the armature winding on different stators increases the degree of freedom in the design of the electromagnetic load, solves the space conflict between the electromagnetic loads of the existing stator permanent magnet type axial field permanent magnet motor, and improves the torque density of the motor.

Description

Technical field: [0001] The invention relates to a stator permanent magnet type axial magnetic field permanent magnet motor. Background technique: [0002] With the emergence of high-performance permanent magnet materials, permanent magnet synchronous motors are also developing rapidly. Among the permanent magnet motors, the axial field permanent magnet motor has the characteristics of high power density, high torque density, high efficiency and high integration, so that it can be used in electric vehicles, wind power generation, ship drives, heart pumps, etc. big application. Usually classified according to the number of stators and rotors, the structure of axial field permanent magnet motor can be divided into single stator and single rotor structure, double stator and single rotor structure, single stator and double rotor structure, and multi stator and multi rotor structure. It can also be divided into two types according to whether the stator has an iron core or not. ...

AI Technical Summary

Problems solved by technology

However, most of the existing axial field permanent magnet motors adopt the permanent magnet structure of the rotor, and there are the following main problems: 1) The permanent magnet is placed on the rotor that is not easy to dissipate heat, and high temperature can cause irreversible demagnetization of the permanent magnet, which seriously affects the motor. performance; 2) In order to overcome the centrifugal force during high-speed operation, a fixing device needs to be installed on the rotor

However, the electromagnetic load of the existing stator permanent magnet type axial field permanent magnet motor is located on the stator, and the electromagnetic load conflict is serious, which restricts the further improvement of the torque density of the motor

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