Hybrid excitation E-shaped iron core axial magnetic field permanent magnet brushless motor

Abstract

The invention discloses a hybrid excitation E-shaped iron core axial magnetic field permanent magnet brushless motor, which comprises two stators, permanent magnets (4), three-phase concentrated armature windings (6), single-phase concentrated excitation windings (7) and a rotor (2). A fan-shaped permanent magnet is arranged between every two E-shaped stator iron cores; the three-phase concentrated armature windings are wound on the teeth of the two stators; and the excitation windings are wound on the middle teeth of the E-shaped stator iron cores. By the excitation windings and the armature windings, the capability of adjusting and controlling an air gap magnetic field of the motor is improved; the speed adjustment range of the motor is effectively broadened; the motor is ensured to have higher torque output capability and higher power density; by two sets of excitation sources provided by the permanent magnets and the excitation windings, the operation reliability of a system is greatly improved, and the fault-tolerant operation of the motor is realized; by a simple rotor structure, the operation reliability and the dynamic performance of the motor are improved; and because the motor has a smaller axial size, the motor is very suitable for places requiring thin installation strictly, such as a hub driving motor for an electric vehicle and the like.

Description

technical field [0001] The invention relates to a hybrid excitation axial magnetic field permanent magnet brushless motor, which is an improvement on the traditional axial magnetic field motor and flux switching stator permanent magnet motor, and belongs to the technical field of permanent magnet motors. Background technique [0002] In 1997, French scholar E. Hoang proposed a flux-switching permanent magnet (FSPM for short) motor, which placed both permanent magnets and windings on the stator, which improved the reliability and dynamic performance of the motor. However, due to the inherent characteristics of permanent magnet materials, the air-gap magnetic field of the FSPM motor remains basically constant during operation. During electric operation, the excitation control of FSPM motor is difficult and the speed regulation range is limited. Therefore, how to realize the effective adjustment and control of the magnetic field and widen its speed regulation range is one of t...

AI Technical Summary

Problems solved by technology

[0005] Technical problem: Aiming at the difficulty of adjusting the magnetic field of the axial magnetic flux switching stator permanent magnet motor, the power density of the motor can be increased without increasing the volume of the motor. By rationally arranging the spatial positions of the armature winding and the excitation winding, the present invention proposes a A Hybrid Excitation E-shaped Iron Core Axial Field Permanent Magnet Brushless Motor

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