Less-rare-earth multi-excitation-source double-stator flux-switching memory motor

Abstract

The invention discloses a less-rare-earth multi-excitation-source double-stator flux-switching memory motor, which belongs to the technical field of motor body design and operating principles. Coaxial outer stators, rotors and inner stators are sleeved together in turns from outside to inside to compose the memory motor, wherein a radial air gap exists between the outer stators and the rotors, the rotors and the inner stators, the outer stators are composed of armature core teeth, fault-tolerant teeth and stator yokes, and the rotors are composed of a rotor support, a magnetic silicon steel block and a magnetic insulation block, and meanwhile, the inner stators are composed of the inner stator core and a combined permanent-magnet cell block. The double-stator structure of the motor realizes the separation of armature winding and permanent magnet and solves the problem that multiple excitation sources inside the traditional flux-switching permanent magnet motors restrain each other, thereby easily increasing motor power density and torque density. The memory motor maintains high air-gap flux density and ensures of the motor power density and the torque density, meanwhile, the consumption of rare-earth permanent-magnetic materials is effectively lowered. On the other side, the memory motor can realize flexible adjustment of a motor air-gap field and expand the range of speed operation.

Description

technical field [0001] The invention belongs to the technical field of motor body design and its working principle, and relates to a motor, in particular to a body design technology of a low-rare-earth multi-excitation source dual-stator flux switching memory motor for electric vehicles. Background technique [0002] The rare earth permanent magnet motor has the characteristics of simple structure, high efficiency and high power density. It is a research and development hotspot in the field of drive motors for new energy vehicles, and it is also the mainstream choice of new energy vehicle manufacturers at home and abroad. In recent years, a class of flux-switching permanent magnet motors with permanent magnets located in the stator has a special magnetic concentration effect on the structure that can make the power density of the motor higher. There are no permanent magnets or windings on the rotor, and the structure is more stable. With smaller inertia, the potential advant...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of traditional magnetic flux switching permanent magnet motors, such as large amount of rare earth permanent magnet materials, high motor manufacturing cost, difficult adjustment of air gap magnetic field, narrow speed regulation range and low high-speed operation efficiency, and propose a rotor with simple structure and stator Partitioned structure, using rare earth NdFeB and non-rare earth AlNiCo mixed permanent magnet materials, with high power density, high efficiency, wide speed range and low cost, rare earth multi-excitation source dual stator flux switching memory motor

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