Harmonic self-excitation constant-voltage hybrid excitation permanent magnet motor

Abstract

The invention relates to a harmonic self-excitation constant-voltage hybrid excitation permanent magnet motor. The harmonic self-excitation constant-voltage hybrid excitation permanent magnet motor includes a case, a stator core, a stator armature winding, a rotor core, permanent magnets, a rotor harmonic winding, a rotor excitation winding and a rotation shaft; the stator armature winding is distributed in stator slots; the rotor core is composed of permanent magnetic poles and ferromagnetic poles; uneven air gaps are formed in the permanent magnetic poles; the permanent magnets are embedded into each of the permanent magnetic poles; the permanent magnets are symmetrically distributed with respect to the center lines of the permanent magnetic poles; one side of the center line of each permanent magnetic pole is slotted along a circumferential direction, the rotor harmonic winding is distributed in the slots of the permanent magnetic poles; the rotor excitation winding sleeves the pole bodies of the ferromagnetic poles; and the rotor harmonic winding is directly connected with the rotor excitation winding through a diode rectifying circuit. Compared with the prior art, the hybrid excitation permanent magnet motor of the invention has the advantages of wide-range air gap magnetic field regulating ability, self-excitation, constant voltage output and high efficiency.

Description

technical field [0001] The invention belongs to the technical field of motors and relates to a permanent magnet motor. Background technique [0002] The harmonic excitation hybrid excitation permanent magnet motor formed by the combination of harmonic excitation and permanent magnet excitation can not only solve the problems of insufficient excitation power and long excitation time of the motor in the existing harmonic excitation, but also obtain harmonic excitation power that can be used In order to realize the adjustment of the air gap magnetic field of the permanent magnet motor, it can give full play to the advantages of both harmonic excitation and permanent magnet excitation. In addition, due to the existence of permanent magnets and the dominant role of permanent magnet excitation, the required harmonic excitation power is small, so this type of motor can maintain high power density and high efficiency of permanent magnet motors. [0003] For ordinary AC motors, the ...

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Problems solved by technology

However, the structure of the rotor of the motor is relatively complex, and it is necessary to arrange a wireless receiving module and a chopper circuit, which makes installation and maintenance difficult and reduces the reliability of operation.

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