Rotor and permanent magnet motor

A rotor and permanent magnet technology, applied in magnetic circuits, electrical components, electromechanical devices, etc., can solve the problems of high harmonic content of air gap magnetic density and small reluctance torque, so as to reduce harmonic content and reduce harmonics. losses, increased efficiency and operational reliability

Inactive Publication Date: 2017-02-22
ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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Problems solved by technology

[0004] The purpose of the present invention is to provide a rotor and a permanent magnet motor to solve the problems of high air-gap magnetic density harmonic content and small reluctance torque in the current rotor

Method used

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  • Rotor and permanent magnet motor

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Embodiment Construction

[0025] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0026] The air gap main magnetic field of a permanent magnet motor is generated by a permanent magnet, and the magnetic density generated by the permanent magnet is positively correlated with its thickness in the magnetization direction. The larger the thickness of the permanent magnet, the larger the air gap magnetic density. Therefore, by changing The thickness of the permanent magnet in the magnetization direction can improve the air-gap flux density waveform, thereby reducing the harmonic content of the air-gap flux density, reducing harmonic loss, and improving the efficiency of the motor using it.

[0027] Based on this, the present invention provides a rotor, which includes a rotor core 2 and a permanent magnet 1 disposed in the rotor core ...

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Abstract

The invention provides a rotor and a permanent magnet motor. The rotor includes a rotor core and a permanent magnet which is arranged in a mounting groove in the rotor core, wherein the permanent magnet is provide with a first end and a second end; the first end is far away from a center shaft of the rotor core; the second end approaches to the center shaft of the rotor core; and from the first end to the second end, the thickness of the permanent magnet is not consistent in the magnetization direction. The scheme of the rotor and the permanent magnet motor can solve the problem that the rotor of an existing permanent magnet motor is relatively high in the air-gap flux density harmonic wave content and is relatively small in the reluctance torque.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a rotor and a permanent magnet motor with the rotor. Background technique [0002] The permanent magnet motor is a commonly used motor, and the rotor is an important part of it. The existing rotor includes a rotor iron core and permanent magnets arranged in the rotor iron core, and the thickness of the permanent magnets in the magnetization direction is consistent. [0003] After testing, during the use of the above-mentioned permanent magnet motor, the rotor air-gap magnetic density harmonic content of the above-mentioned structure is relatively high, and the reluctance torque is small, which leads to low utilization rate. Contents of the invention [0004] The purpose of the present invention is to provide a rotor and a permanent magnet motor to solve the problems of high air-gap magnetic density harmonic content and small reluctance torque existing in the current rotor. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27
CPCH02K1/274H02K2213/03
Inventor 李权锋
Owner ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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