Hybrid Excitation Permanent Magnet Motor with Double Harmonic Excitation

Abstract

The invention provides a biharmonic excitation mixed excitation permanent magnet motor. The biharmonic excitation mixed excitation permanent magnet motor comprises an enclosure, a stator iron core, a stator winding, a permanent magnet, a rotary shaft, a rotor iron core and a rotor winding, wherein the stator winding is distributed in a stator groove; the rotor iron core is provided with a permanent magnet pole and a ferromagnetic pole; the rotor winding is composed of a harmonic winding a, a harmonic winding b and an excitation winding; the harmonic winding a is distributed in a groove of the permanent magnet pole and the harmonic winding b is distributed in a groove of the ferromagnetic pole; the excitation winding sleeves the pole body of the ferromagnetic pole; the harmonic winding a and the harmonic winding b are connected with the excitation winding by diode rectification circuits. When a power generator is operated, a gas magnetic field can be automatically adjusted by induction electrodynamic potentials of the harmonic windings. Compared with the prior art, an electric brush, a slide ring, an alternating-current exciter and a voltage regulator are not needed, and a gas gap and an axial magnetic path are not needed; the biharmonic excitation mixed excitation permanent magnet motor has a simple structure, good gas magnetic field adjusting capability and compound excitation property.

Description

technical field [0001] The invention belongs to the technical field of motors and relates to a permanent magnet motor. Background technique [0002] Compared with electric excitation motors, permanent magnet motors have the advantages of high efficiency, high power density, and brushless. Therefore, permanent magnet motors are widely used in various fields of social development. However, since the excitation magnetic field of a permanent magnet motor is generated by a permanent magnet, it is impossible to adjust the air gap magnetic field by adjusting the excitation current like an electric excitation motor. In order to overcome this shortcoming of the permanent magnet motor, some experts and scholars at home and abroad have proposed a hybrid excitation permanent magnet motor, which has two kinds of excitation magnetomotive forces: permanent magnet excitation magnetomotive force and electric excitation magnetomotive force The magnetomotive force is used to adjust the air ga...

AI Technical Summary

Problems solved by technology

At present, the proposed hybrid excitation permanent magnet motors have realized the adjustment of the permanent magnet motor air gap magnetic field, but some hybrid excitation permanent magnet motors have low efficiency, or have additional air gaps and axial magnetic circuits, or have lost the permanent magnet motor Advantages of brushless

In addition, most existing hybrid excitation permanent magnet motor solutions require a voltage regulator

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