Asymmetric permanent magnet memory motor with dynamic adjustable variable axis offset capability

Abstract

The invention discloses an asymmetric permanent magnet memory motor with dynamic adjustable variable axis offset capability, and relates to the field of variable-flux permanent magnet memory motors. The asymmetric permanent magnet memory motor aims to solve the problem that the traditional memory motor is low in torque performance and cannot solve the difficulty of reduction in an efficient operation efficiency region of the motor. The asymmetric permanent magnet memory motor comprises a first permanent magnet group and a second permanent magnet group, wherein the first permanent magnet group comprises two first permanent magnets which have rectangular cross sections and are made of different materials, the two first permanent magnets are arranged in a V shape, the magnetizing direction of each first permanent magnet is parallel to the length direction of the short edge of the first permanent magnet, and the magnetizing directions of the two first permanent magnets are in mirror symmetry; and the second permanent magnet group comprises two second permanent magnets which have trapezoidal cross sections and are made of different materials, the two second permanent magnets are arranged in a mirror symmetry manner and form a pentagon, the magnetizing directions of the two second permanent magnets are both the length direction of the lower bottom part of the trapezoid, and the attached edges of the two second permanent magnets are arranged in the radial direction of the rotor iron core. The asymmetric permanent magnet memory motor is suitable for variable speed operation occasions with dynamic adjustable magnetic flux and dynamic adjustable torque performance.

Description

technical field [0001] The invention belongs to the field of variable flux permanent magnet memory motors. Background technique [0002] In a traditional permanent magnet memory motor, each pole of the rotor permanent magnet adopts a single type of symmetrically distributed permanent magnet topology and distribution. When the motor needs to be operated with speed regulation, as the frequency of the armature current increases, the winding back EMF generated by the permanent magnetic field in the rotor of the motor relative to the rotation of the stator armature winding will also increase at the same time; As the rotational speed further increases, the back electromotive force on the armature winding will also further increase, and eventually the voltage at both ends of the armature winding will approach and eventually exceed the voltage withstand capability of the power electronic devices on the motor power supply, and it is no longer possible to realize the motor by frequenc...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the torque performance of the traditional memory motor will be reduced when the speed-adjusting range of the motor is improved by using the magnetic field-weakening technology, and the problem that the efficiency area of ​​the motor’s high-efficiency operation is still unable to be solved. Asymmetric permanent magnet memory motor with shaft offset capability

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