Hybrid excitation permanent magnet synchronous motor with third harmonic excitation

Abstract

The invention discloses a third-harmonic-excitation mixed-excitation permanent magnet synchronous motor. The third-harmonic-excitation mixed-excitation permanent magnet synchronous motor comprises a machine shell and is characterized in that a stator which is composed of a stator iron core, stator armature windings, and stator third harmonic windings, an electric brush which is fixed on the machine shell, and a rotor which is composed of a rotor iron core, rotor exciting windings, permanent magnets, a spindle and a collecting ring are arranged inside the machine shell. The stator armature windings and the stator third harmonic windings are distributed in grooves which are formed in the stator iron core along the peripheral direction of the stator iron core. The permanent magnets and the rotor exciting windings are arranged on the rotor iron core, the rotor exciting windings are distributed in grooves formed in the rotor iron core along the peripheral direction of the rotor iron core between the permanent magnets, and leading wires of the rotor exciting windings are connected with the collecting ring. The collecting ring is sleeved on the spindle and is connected with the stationary electric brush. The third-harmonic-excitation mixed-excitation permanent magnet synchronous motor improves the utilization rate of materials and has the advantages that an air gap magnetic field is convenient to regulate, electric excitation loss is small, and the advantage that permanent magnet motor efficiency is high is kept.

Description

technical field [0001] The motor technical field of the present invention relates to a permanent magnet motor. Background technique [0002] Permanent magnet motors have many advantages such as high efficiency, high power density, simple structure, and reliable operation, making permanent magnet motors widely used, such as drive motors for electric vehicles, air-conditioning compressors, wind power generators, mobile power supplies, and aerospace vehicles. generator. At the same time, the disadvantage of difficult adjustment of the air gap magnetic field also hinders the further promotion and application of permanent magnet motors to a certain extent. In order to overcome its shortcomings, many experts and scholars have proposed a variety of hybrid excitation permanent magnet motors. There are two kinds of excitation magnetomotive forces in the motor: permanent magnet magnetomotive force and electric excitation magnetomotive force. By adjusting the electric excitation magne...

AI Technical Summary

Problems solved by technology

For the field winding rotary hybrid excitation permanent magnet motor, one type of hybrid excitation permanent magnet motor is a combination of permanent magnet synchronous motor and electric excitation synchronous motor. The two motors are independent of each other on the magnetic circuit, thereby reducing the power density of the motor.

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