A slotless high-speed permanent magnet motor with a stator assembly and multilayer sinusoidal windings

Abstract

The invention discloses a stator assembly and a slotless high-speed permanent magnet motor with multi-layer sine winding. The stator assembly comprises a stator core and multi-layer coil winding layers, wherein the multi-layer coil winding layers is mounted on the inner side of the stator core, and is distributed in the inner and outer layers in the radial direction. Each layer of the coil windinglayers comprises a first unit, a second unit, and a third unit that are alternately disposed. The first unit, the second unit, and the third unit each comprises a set number of coil windings, and thefirst unit, the second unit, and the third unit on the adjacent layers are alternately disposed. In the technical solution provided by the stator assembly and slotless high speed permanent magnet motor with multi-layer of sine winding, the stator core of the slotless high-speed permanent magnet motor with multi-layer sine winding is a non-cogging structure and the coil winding layers are alternately disposed, the tooth harmonic of the radial air gap magnetic density of the armature reaction magnetic field is eliminated and the characteristic harmonic is greatly reduced to better improve the sinusoidality of the radial air gap magnetic density of the armature reaction magnetic field, and the phase windings are spatially arranged, and the layers are not stacked to reduce the axial length ofthe end windings.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a stator assembly and a slotless high-speed permanent magnet motor with multi-layer sinusoidal windings. Background technique [0002] In recent years, the application of motors has been continuously expanded in the fields of agriculture, industry, transportation, military industry, aerospace and other fields, and has also been better applied. At the same time, many application fields have higher and higher requirements for motor performance, such as high-speed motor speed, miniaturization of motor volume, lower vibration and noise indicators, and higher efficiency. Traditional motor materials, power electronics technology, design methods and design structures have been difficult to meet the high requirements of many applications. Driven by the continuous improvement of motor performance requirements, adopting new motor design methods and topology structures, improving power elec...

AI Technical Summary

Problems solved by technology

[0003] The stator of the existing motor mostly adopts a single-layer or double-layer winding with a cogging structure. This structure will make the cogging electromagnetic harmonics and characteristic electromagnetic harmonics in the air gap of the motor quite rich, which will be very unfavorable for the vibration and noise of the motor. Improvement of performance; at the same time, the eddy current effect on the rotor permanent magnet and the metal sheath of the high-speed or ultra-high-speed surface-mounted permanent magnet motor will also be intensified. Due to the difficulty in heat dissipation of the rotor, it is easy to cause local loss of magnetism or even irreversible heat of the rotor permanent magnet Demagnetization reduces the performance of the motor; the end of the high-speed or ultra-high-speed motor with a two-pole structure is usually very long, and the volume of the motor is difficult to meet the requirements of miniaturization

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