Motor rotor, motor and compressor

Abstract

The invention provides a motor rotor, a motor and a compressor. The motor rotor comprises a rotor core and M tangential permanent magnets arranged at intervals along a circumferential direction of therotor core, the tangential permanent magnets extend along a radial direction of the rotor core, and a first magnetic isolation groove is formed in the rotor core between any two adjacent tangential permanent magnets. On any section perpendicular to an axis of the rotor core, an included angle theta 1 which is larger than 0 degree and smaller than 90 degrees is formed between an extending direction of the first magnetic isolation groove and a d axis, the polarities of facing sides of any two adjacent tangential permanent magnets are the same, each first magnetic isolation groove is provided with a first end close to the axis of the rotor core and a second end away from the axis of the rotor core, and the first end is located in front of the second end in the rotating direction of the rotoriron core. The reluctance torque can be fully utilized to improve the output torque of the motor, the use amount of the permanent magnets is reduced, the utilization rate of the permanent magnets isimproved, and the manufacturing cost of the rotor and even the motor is reduced.

Description

technical field [0001] The invention belongs to the technical field of motor manufacturing, and in particular relates to a motor rotor, a motor and a compressor. Background technique [0002] The embedded permanent magnet motor is divided into two structures: radial flux and tangential flux according to the direction of flux. For permanent magnet motors with tangential flux structure, the permanent magnets in the rotor extend along the radial direction of the rotor, which can produce a "magnetism gathering effect". Therefore, compared with the radial flux structure, the flux utilization rate is higher, and the motor has It has the advantages of small size, light weight, large torque, high power density, high motor efficiency and good dynamic performance. [0003] The permanent magnet layout of the tangential flux permanent magnet motor in the prior art is as follows: figure 1 As shown, in order to provide a larger motor output torque in this structure, the amount of perman...

AI Technical Summary

Problems solved by technology

[0003] The permanent magnet layout of the tangential flux permanent magnet motor in the prior art is as follows: figure 1 As shown, in order to provide a larger motor output torque in this structure, the amount of permanent magnets is relatively high (especially the width is widened), and the utilization rate is low, resulting in high manufacturing costs for the rotor and even the motor.

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