A high-speed permanent magnet motor with parallel magnetization and rare-earth combined partial Halbach array

Abstract

The invention discloses a Halbach array high-speed permanent magnet motor with parallel magnetization and low rare earth combination, which comprises a stator core, a winding, a rotor, a surface-mounted permanent magnet and a protective cover. A three-phase winding is arranged in the slot of the stator core; There is a pair of pole-parallel magnetized surface-mounted permanent magnets. The surface-mounted permanent magnet uses a combination of high-remanence NdFeB material and low-remanence ferrite material. The NdFeB is magnetized in parallel in sections, and Changing the magnetization angle makes part of the NdFeB and ferrite form a local Halbach array to maintain the original performance of the motor; the protective cover is made of titanium alloy and installed outside the surface-mounted permanent magnet to increase the structural strength of the rotor and prevent the rotor from Disintegrates at high speed rotation. The invention uses low-cost ferrite materials to replace part of expensive rare earth permanent magnet materials, thereby reducing the cost of the motor while keeping the performance of the motor unchanged.

Description

technical field [0001] The invention relates to a high-speed permanent magnet motor, in particular to a high-speed permanent magnet motor with parallel magnetization and rare earth combined partial Halbach array, which belongs to the technical field of high-speed motors. Background technique [0002] The study of high-speed motors is becoming one of the research hotspots in the field of electrical engineering. Compared with ordinary motors, high-speed motors have a higher power density, and their geometric dimensions are much smaller than medium and low-speed motors with the same output power; the moment of inertia is small and the dynamic response is fast; it can directly drive high-speed loads, eliminating the need for traditional mechanical transmission devices , avoiding the loss, mechanical vibration and noise caused by the speed change device, so that the equipment volume is reduced, the maintenance cost is reduced, and the efficiency and precision of the transmission ...

AI Technical Summary

Problems solved by technology

However, compared with rare earth permanent magnet motors, ferrite permanent magnet motors are not only larger in size, but also inevitably have disadvantages such as torque ripple and noise.

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