Multi-combination type permanent magnet motor rotor punching sheet and permanent magnet motor

Abstract

The invention discloses a multi-combination permanent magnet motor rotor punching sheet, which comprises a rotor punching sheet body. The rotor punching sheet body is divided into a plurality of rotor poles which are distributed in a circumferential array, the rotor punching sheet body is provided with a shaft hole, lightening holes and inverted triangular magnetic steel grooves which are distributed in the circumferential direction, and each rotor pole is matched with one inverted triangular magnetic steel groove. Each inverted triangular magnetic steel groove comprises linear magnetic steel grooves and two bevel magnetic steel grooves; the linear magnetic steel grooves are formed by arranging an odd number of rectangular magnetic steel grooves with the length of a and the width of b at intervals, and the number of the linear magnetic steel groove is n; and the length of each bevel magnetic steel groove is n * a, and the width of each bevel magnetic steel groove is b. According to the invention, permanent magnets are inserted into the appropriate magnetic steel grooves and matched with different small round holes to form corresponding skewed pole angles, so that different performance requirements of a motor are met, the research, development and production periods of the punching sheet are shortened, and the material management and control, the purchase cost and the process complexity are also reduced; and meanwhile, asymmetry of magnetic poles can be realized, so that the effects of weakening harmonic waves and reducing torque fluctuation are achieved.

Description

technical field [0001] The invention relates to the technical field of drive motors, in particular to a multi-combinable permanent magnet motor rotor punch and a permanent magnet motor. Background technique [0002] In the prior art, the asymmetrical magnetic poles are generally realized by shifting the magnetic poles by a certain angle or opening asymmetrical small holes on the rotor, and the skewed poles of the rotor are realized by stacking the same punching pieces forward and backward. For example, in the article "Electric MotorDesign of General Motors'Chevrolet Bolt Electric Vehicle", the rotor of the bolt motor is stamped to achieve rotor pole asymmetry through unequal magnetic pole angles and asymmetric holes; A single mold realizes the keyway scheme in the "rotor punching sheet with segmented and staggered poles" of the rotor to achieve positive and negative stacking. [0003] General rotor laminations are specially designed according to the performance of the motor...

AI Technical Summary

Problems solved by technology

[0003] The general rotor punching is specially designed according to the performance of the motor, which cannot meet different performance requirements and noise standards.

The versatility of the existing rotor laminations is insufficient and cannot be applied to different performance requirements at the same time, which lengthens the R&D and production cycle of the laminations, and also increases material control, procurement costs and process complexity

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