Mixed asymmetric permanent magnet rotor

Abstract

The invention discloses a mixed asymmetric permanent magnet rotor which aims at solving the problems that material cost is excessively high, and torque ripples need to be reduced. The rotor comprises a rotating shaft, a rotor core and a permanent magnet. The permanent magnet is pasted to the surface of the rotor core in a sectional-type-structure mode and is of a spliced structure made of neodymium iron boron materials and ferrite materials, each pole of the permanent magnet is formed by three permanent magnet bodies, the middle of the permanent magnet is made of the neodymium iron boron materials, and the two ends of the permanent magnet are made of the ferrite materials. When the rotor rotates, air gap flux density is in a step shape which is closer to the sine wave, and the torque ripples are effectively reduced. The mixed asymmetric permanent magnet rotor is mainly used for a linear rotating converter, shaking and losses of the converter can be lowered with the rotor serving as a rotating part, and meanwhile the stability of the converter is improved.

Description

technical field [0001] The invention relates to a hybrid asymmetrical permanent magnet rotor, which belongs to the technical field of motors. Background technique [0002] With the rise of rare earth permanent magnet materials, the manufacturing cost of permanent magnet rotors increases. Although the traditional permanent magnet rotor structure uses high-performance permanent magnet materials to obtain high magnetic energy density, it fails to fully utilize the permanent magnetic material, resulting in waste of resources; while obtaining high magnetic energy density, the traditional permanent magnet motor rotor structure will make The motor produces torque pulsation, which causes the motor to vibrate, make noise, run unstable, and affect the operating efficiency of the motor. [0003] The hybrid asymmetrical permanent magnet rotor is used, and part of the permanent magnets are made of low-remanence and cheap permanent magnet materials, which do not have much impact on the a...

AI Technical Summary

Problems solved by technology

[0002] With the rise of rare earth permanent magnet materials, the manufacturing cost of permanent magnet rotors increases

Although the traditional permanent magnet rotor structure uses high-performance permanent magnet materials to obtain high magnetic energy density, it fails to fully utilize the permanent magnetic material, resulting in waste of resources; while obtaining high magnetic energy density, the traditional permanent magnet motor rotor structure will make The motor produces torque pulsation, which causes the motor to vibrate, make noise, run unstable, and affect the operating efficiency of the motor

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