Permanent magnet motor rotor with high saliency ratio and motor

Abstract

The present invention relates to a permanent magnet motor rotor with a high saliency ratio. The permanent magnet motor rotor with a high saliency ratio comprises a rotor sheet and permanent magnets; radial slot sets configured to put the permanent magnets and matching with the number of poles are uniformly arranged at a circumference direction of the rotor sheet, the radial slot sets are two or more than two layers of permanent magnet slots arranged on the rotor sheet along a radial direction, the permanent magnet slots are distributed in a line-shaped mode or a W-shaped mode along the circumference of the rotor sheet, the permanent magnets are arranged in the permanent magnet slots, and two ends of each permanent magnet slot are respectively provided with non-magnetic slots. The radial slot sets configured to put the permanent magnets and matching with the number of poles are uniformly arranged at the circumference direction of the rotor sheet, and a plurality of permanent magnets arearranged at each pole, so that a saliency ratio is greatly improved, and processing is very simple. The present invention further relates to a motor comprising the permanent magnet motor rotor with ahigh saliency ratio.

Description

technical field [0001] The invention relates to the field of motors, in particular to a high salient pole ratio permanent magnet motor rotor and motor. Background technique [0002] Permanent magnet motors for electric vehicles require a wide range of speed regulation and strong overload capacity. To have such characteristics, it is very important that the salient pole ratio of the motor is required to be large, and the rotor structure of the permanent magnet motor, that is, the shape of the permanent magnet , arrangement, etc., have a great influence on this parameter. The permanent magnets of the traditional permanent magnet motor are arranged in a "one" shape, that is, there are "one"s that match the number of poles in the circumferential direction of the rotor sheet to place the permanent magnets. ""-shaped groove, and there is a magnetic isolation groove between adjacent "one" shapes, but the salient poles of the "one"-shaped arrangement are relatively low. For motors w...

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Problems solved by technology

[0002] Permanent magnet motors for electric vehicles require a wide range of speed regulation and strong overload capacity. To have such characteristics, it is very important that the salient pole ratio of the motor is required to be large, and the rotor structure of the permanent magnet motor, that is, the shape of the permanent magnet , arrangement, etc., have a great influence on this parameter. The permanent magnets of the traditional permanent magnet motor are arranged in a "one" shape, that is, there are "one"s that match the number of poles in the circumferential direction of the rotor sheet to place the permanent magnets. ""-shaped groove, and there is a magnetic isolation groove between adjacent "one" shapes, but the salient poles of the "one"-shaped arrangement are relatively low. For motors with a large salient pole ratio, the permanent magnets generally adopt a "W"-shaped arrangement. Cloth, that is, in the circumferential direction of the rotor punching sheet, there are evenly arranged "W"-shaped slots matching the number of poles for placing permanent magnets, and magnetic isolation slots are provided between adjacent "W"-shaped slots. The processing and manufacturing of "W" groove is more difficult

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