A rare-earth combined excitation type stator-rotor dual-section adjustable flux permanent magnet motor

Abstract

The invention discloses a rare-earth combined excitation type stator-rotor dual-section adjustable flux permanent magnet motor. zone rotor and inner zone stator; the doubly salient pole middle zone stator is composed of stator yoke, stator slot, radially bilaterally protruding stator teeth and fault-tolerant teeth, among which, centralized distributed three-phase armature windings are wound on the stator teeth; the inner zone In the stator, tangentially magnetized rare earth NdFeB permanent magnets are evenly embedded along the circumferential direction; in the outer stator, radially magnetized AlNiCo permanent magnets are evenly surface-mounted along the circumferential direction, and the adjacent AlNiCo permanent magnets Slots are left between them for placing pulse magnetized windings; both the inner and outer rotors exhibit a salient pole structure, and the gaps between the salient poles are filled with non-magnetic materials. The present invention realizes the purpose of increasing the torque density, widening the speed regulation range and further reducing the usage amount of the rare earth permanent magnet material by adopting the double partition structure of the stator and the rotor.

Description

technical field [0001] The invention relates to a body design technology of a low-rare-earth combined excitation type stator-rotor dual-section adjustable flux permanent magnet motor for electric vehicles, and relates to the technical field of motor body design and its working principle. Background technique [0002] In the field of drive motors for new energy vehicles such as electric vehicles, rare earth permanent magnet motors with advantages such as high efficiency and high power density are not only a research and development hotspot, but also the mainstream choice of new energy vehicle manufacturers at home and abroad. According to the characteristics of electric vehicle drive application, the problems that need to be solved in the prior art are: 1. Reduce the amount of rare earth permanent magnets while ensuring the power of the motor; 2. Realize the effective adjustment and control of the air gap magnetic field of the motor; 3. Widen the motor The actual controllable...

AI Technical Summary

Problems solved by technology

[0007] Purpose of the invention: In order to solve the problems of large amount of rare earth permanent magnets used in traditional permanent magnet motors, difficulty in adjusting the air gap magnetic field, and narrow speed regulation range, provide a combined excitation source with high efficiency, high torque density, and wide speed regulation operating range. A low-rare-earth combined excitation type stator-rotor double-section adjustable flux permanent magnet motor, which is suitable for the field of electric vehicle drive

Images