Multi-layer rotor magnetic steel structure of permanent magnet motor for high-power-density new energy automobile

Abstract

The invention discloses a multi-layer rotor magnetic steel structure of a permanent magnet motor for a high-power-density new energy automobile. The structure comprises a rotor core, a plurality of magnetic steel groove groups are arranged on the rotor core at interval along the circumferential direction, each magnetic steel groove group is composed of first layer V-shaped magnetic steel grooves and second layer V-shaped magnetic steel grooves, and a first layer of magnetic steel and a second layer of magnetic steel are respectively arranged in the first layer V-shaped magnetic steel groove and the second layer V-shaped magnetic steel groove; the first layer of V-shaped magnetic steel grooves are symmetrical about the radial direction of the rotor core, and the second layer of V-shaped magnetic steel grooves are symmetrically arranged at two sides of the first layer of V-shaped magnetic steel grooves; v-shaped openings of the first-layer V-shaped magnetic steel grooves face the outer ring of the rotor core, and the extending directions of the two side grooves of the first-layer V-shaped magnetic steel grooves and the extending directions of the two side grooves of the second-layerV-shaped magnetic steel grooves are correspondingly parallel. A rotor is high in structural strength, and the permanent magnet motor manufactured by the rotor is high in power density.

Description

technical field [0001] The invention relates to the technical field of permanent magnet motors, in particular to a multilayer rotor magnetic steel structure of a permanent magnet motor for new energy vehicles with high power density. Background technique [0002] At present, there is a serious shortage of energy in the world. The ecological environment is deteriorating rapidly, environmental protection issues are becoming more and more prominent, and the development of low-carbon economy is imminent. New energy vehicles have become the most respected emerging industries in the field of energy conservation and environmental protection in the world. The improvement of vehicle electrification technology has attracted more attention. As the driving motor of the "engine" of hybrid electric vehicles and pure electric vehicles, it has become the core component directly related to the performance of new energy vehicles and energy saving and emission reduction. The permanent magnet...

AI Technical Summary

Problems solved by technology

[0006] At present, most of the built-in structures in the industry are "one", "V" or "triangular" structures, and the field-weakening speed range and torque density cannot meet the performance requirements of permanent magnet motors for high-power-density vehicles. Aiming at this problem, the invention researches a built-in multi-layer rotor magnetic steel structure

Images