Rotor of rotary motor, permanent magnetic motor, compressor and air-conditioning system

Abstract

The invention discloses a rotor of a rotary motor, a permanent magnetic motor, a compressor and an air-conditioning system. The rotor of the rotary motor comprises a body, the body is provided with multiple magnetic poles arranged to be spaced along a circumferential direction, the multiple magnetic poles are rotationally symmetrical relative to the rotation center of the body, each magnetic pole comprises a first permanent magnet and a second permanent magnet, and the coercive force of each first permanent magnet is more than two times that of each first permanent magnet. According to the rotor of the rotary motor provided by one embodiment of the invention, the counterelectromotive force coefficient of the motor can be flexibly adjusted according to the need of the operation speed of the rotor, the motor always runs at a high-efficiency state, and at the same time, the rotating speed scope of a conventional motor can also be enlarged.

Description

technical field [0001] The invention relates to the technical field of refrigerating equipment, and more specifically, to a rotor of a rotating electric machine, a permanent magnet motor having the same, a compressor and an air-conditioning system. Background technique [0002] At present, in the high-speed operation range and high-efficiency permanent magnet motor, in order to improve the speed expansion range and efficiency of the motor, the rotor with a built-in permanent magnet structure is generally selected, and each magnetic pole has a single or multiple permanent magnet slots. Embed permanent magnets arranged radially or tangentially, and by setting the number and shape of the magnetic isolation slots between the poles reasonably, or by adjusting the shape of the outer edge of the rotor, it is ensured that the motor has high efficiency while having relatively high efficiency. Low cost, and good noise and vibration characteristics. [0003] In recent years, with the ...

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Problems solved by technology

[0006] In order to achieve the same effect as the "inline" rotor, it is necessary to increase the level of the magnet with a large product of coercive force and magnetization direction thickness, which will lead to an increase in the cost of the motor

[0007] In addition, in the above-mentioned patents, the cross-sections of the two permanent magnets with different coercivity and magnetization direction thickness are not common rectangles, and the permanent magnets are respectively embedded in separate magnet slots, which increases the difficulty of manufacturing and assembly

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