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Motor rotor, motor and compressor

A technology of motor rotor and rotor body, which is applied in the field of compression devices, can solve the problems of severe noise and large torque ripple, and achieve the effects of reducing electromagnetic noise, reducing radial electromagnetic force, and reducing output torque ripple

Pending Publication Date: 2019-07-12
ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a motor rotor, motor and compressor to solve the problems of large torque ripple and serious noise in the rare earth permanent magnet motor in the prior art

Method used

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  • Motor rotor, motor and compressor
  • Motor rotor, motor and compressor
  • Motor rotor, motor and compressor

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Embodiment Construction

[0042] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0043] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0044]The relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present i...

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Abstract

The invention provides a motor rotor, a motor and a compressor. The motor rotor includes a rotor body, wherein a plurality of poles are disposed on the rotor body in a circumferential direction; eachof the poles includes two magnetic steel slots spaced apart in the radial direction of the rotor body and permanent magnets embedded in the magnetic steel slots; and at least one magnetic barrier structure is arranged between the two magnetic steel slots of each pole. The reactance of the quadrature-axis magnetic circuit of the motor rotor can be controlled within a reasonable range so as to ensure that the motor rotor has a certain output torque, reduce the output torque ripple and the radial electromagnetic force, improve a cogging effect, and reduce the electromagnetic excitation force andelectromagnetic noise caused thereby.

Description

technical field [0001] The invention relates to the technical field of compression devices, in particular to a motor rotor, a motor and a compressor. Background technique [0002] Single-layer permanent magnet embedded in the rotor is a common structure of rare earth permanent magnet synchronous motor, but its alternating and direct axis inductance is small, and the field weakening capability is limited. The double-layer permanent magnet structure can increase the inductance of the alternating and direct axes, increase the proportion of the reluctance torque, and at the same time improve the magnetic field weakening capability of the motor, which has great advantages in the high-speed field. However, the larger salient pole ratio of the double-layer structure will increase the output torque ripple and the amplitude of the radial electromagnetic force wave, which will cause an increase in the 0th order and 2P (motor pole number) order electromagnetic force, which will easily ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27H02K1/28H02K5/24H02P25/098
CPCH02K1/276H02K1/28H02K5/24H02P25/098
Inventor 张辉周博陈华杰朱晓光
Owner ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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