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

Abstract

The hybrid excitation E-shaped iron core axial magnetic field permanent magnet brushless motor of the present invention includes two stators, permanent magnets (4), three-phase concentrated armature windings (6), single-phase concentrated excitation windings (7) and rotors (2 ). A fan-shaped permanent magnet is arranged between every two E-shaped stator cores, the three-phase concentrated armature coil is wound on the two stator teeth, and the excitation winding is wound on the middle tooth of the E-shaped stator core. The use of electric excitation windings and armature windings improves the adjustment and control capabilities of the air gap magnetic field of the motor, effectively broadens the speed regulation range of the motor, and ensures that the motor has a strong torque output capability and high power density; using permanent The two sets of excitation sources provided by the magnet and the electric excitation winding greatly improve the reliability of the system operation and realize the fault-tolerant operation of the motor; the simple rotor structure improves the reliability of the motor operation and the dynamic performance of the motor; the shaft of the motor Smaller in size, it is very suitable for applications that strictly require thin installation, such as wheel hub drive motors for electric vehicles.

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 ...

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. Reasonably arrange the spatial positions of the armature winding and the excitation winding, and the present invention proposes a hybrid excitation E-shaped iron core axial magnetic field permanent magnet brushless motor

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