Stator duplex-winding permanent magnet motor with alternating current magnetic regulation

Abstract

The invention discloses a stator duplex-winding permanent magnet motor with alternating current magnetic regulation. The permanent magnet motor comprises a stator assembly and a rotor assembly which are coaxially installed, the rotor assembly is located in the stator assembly, the stator assembly comprises a stator iron core, an armature winding and an excitation winding, the rotor assembly comprises a transmission shaft, a rotor iron core and tangential permanent magnets, a plurality of magnetic barriers which are symmetrical about the center of the transmission shaft are arranged in the rotor iron core, and the magnetic barriers are cavities extending in the axial direction of the rotor iron core; the armature winding and the excitation winding are located in a stator groove of the stator iron core, the tangential permanent magnets are embedded and installed in the rotor iron core at intervals, and the magnetizing directions of the adjacent tangential permanent magnets are opposite; and the two sides of each tangential permanent magnet are each provided with a magnetic barrier, the rotor iron core part between the adjacent magnetic barriers forms a main magnetic pole of the rotor assembly, and the stator iron core and the rotor iron core are separated by a main air gap. According to the invention, by controlling the amplitude and phase of the excitation winding current, efficient adjustment of the main air-gap magnetic field of the permanent magnet motor is realized.

Description

technical field [0001] The invention relates to the technical field of brushless excitation synchronous motors, in particular to an AC magnetically modulated stator double-winding permanent magnet motor. Background technique [0002] The hybrid excitation motor combines the high power density of the permanent magnet synchronous motor and the adjustable air gap magnetic field of the electric excitation motor. From the perspective of the relationship between the permanent magnetic potential and the excitation magnetic potential, the hybrid excitation motor can be divided into series and parallel. The excitation flux of the series type passes through the permanent magnet, which will cause the risk of demagnetization of the permanent magnet, and the parallel type. Field flux and permanent magnet flux are independent of each other. [0003] In order to realize the brushless excitation technology of the hybrid excitation motor, there are usually two methods, the first is; the fie...

AI Technical Summary

Problems solved by technology

[0004]When the motor rotor size is constant, the tangential permanent magnet motor can effectively increase the magnetic flux area and improve the main air gap compared with the radial permanent magnet motor structure However, the magnetic flux of the traditional tangential structure rotor core poles is very high, and its leakage flux is relatively large, which reduces the flux utilization rate of the motor, thereby reducing the power density of the motor

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