Rotor and permanent magnet motor

Abstract

The invention provides a rotor and a permanent magnet motor. The rotor comprises a rotor core, the rotor core comprises a plurality of magnetic poles distributed on the circumferential direction, andeach magnetic pole comprises a first magnetic steel slot; the first magnetic steel slot adopts a center line as a symmetric axis, and the center line is distributed along the radial direction of the rotor core; the first magnetic steel slot comprises an outer wall surface, an inner wall surface and two side wall surfaces, wherein the outer wall surface and the inner wall surfaces are respectivelyplanes and are respectively vertical to the center line; the two side wall surfaces are respectively located at two ends of the first magnetic steel slot and are respectively connected with the outerwall surface and the inner wall surface; each side wall surface is provided with a peak-shaped projection that protrudes toward the outer circumferential surface of the rotor core, and the end part ofthe first magnetic steel slot is located on the inner side of the peak-shaped projection. According to the rotor provided by the invention, the peak-shaped projections are added on the two ends of the first magnetic steel slot to reduce the mechanical stress on the two ends of the first magnetic steel slot during the high-speed running of the rotor while reducing the magnetic flux leakage of therotor core.

Description

technical field [0001] The invention relates to the field of motors, more specifically, to a rotor and a permanent magnet motor. Background technique [0002] Environmental pollution and energy crisis have promoted the vigorous development of the new energy vehicle industry, especially the electric vehicle industry. As one of the key executive components of electric vehicles, the performance of vehicle drive motors is crucial to the performance of the entire vehicle. Due to the advantages of high power density and high efficiency, permanent magnet motors have been widely used in the field of vehicle drive motors. In order to increase the power density of the drive system, a combination of permanent magnet motor and reducer is usually used to provide driving force for electric vehicles. [0003] Due to the special operating conditions of electric vehicles, permanent magnet motors are usually required to have higher power density, so the maximum speed of the motor is usually ...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a rotor and a permanent magnet motor for the above-mentioned problem that the rotor of the permanent magnet motor has a high cost and is not conducive to realizing the maximum utilization rate of the magnet steel.

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