A DC Bias Flux Inversion Permanent Magnet Motor

Abstract

The invention discloses a DC bias type magnetic flux reversal permanent magnet motor, which comprises a permanent magnet stator and a salient pole iron core rotor, an independent air gap is formed between the permanent magnet type stator and the salient pole iron core rotor, and the permanent magnet The type stator includes a stator yoke and a number of stator teeth. The stator yoke and a number of stator teeth form a number of stator slots. Armature windings are placed in the slots, and biased DC current is injected into the armature windings. The notch of each stator slot Permanent magnets are arranged at each position, and the permanent magnets and adjacent stator teeth form a pair of magnetic poles. The number of permanent magnets at the notch of each stator slot and the magnetization method are the same. The invention can realize the multi-harmonic operation of the stator armature winding at the same time, realize the adjustment of the magnetic field of the motor by controlling the positive and negative injection of the direct current, and is very suitable for high-power demand occasions such as wind power generation and electric vehicles.

Description

Technical field [0001] The present invention belongs to the field of motors, and in particular, the present invention relates to a DC bias permanent magnet motor. Background technique [0002] Permanent magnet motors have a wide range of applications in industrial, aviation, orbit transportation in the fields of high torque density, high power density and high efficiency. However, due to the problem of complexity of the operating conditions, the design of the permanent magnet motor has made a big challenge, such as the mechanical strength, high temperature dehydration and weak magnetization of the permanent magnet rotor. In recent years, due to problems such as heat dissipation and permanent magnets, high-speed reliability of permanent magnet rotors, the stator permanent magnet motor (magnetic flux motor, magnetic flux motor, etc.) due to the advantages of flexible and easy heat dissipation, etc. A wide range of research. [0003] However, the permanent magnet motor is difficult ...

AI Technical Summary

Problems solved by technology

The motor has the following disadvantages: the permanent magnet is located on the stator teeth, which increases the effective air gap of the motor, and the torque density of the motor is not high; in addition, due to the increase of the effective air gap, the inductance of the motor decreases, and the short-circuit current of the motor increases, which reduces the performance of the motor. Failure operation reliability

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