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Permanent magnet for motors and rotor component with same, motor, and compressor

A technology of permanent magnets and components, applied in the field of compressors, can solve the problem of low cost performance of permanent magnets, and achieve the effect of cost performance improvement and excellent performance

Inactive Publication Date: 2018-02-16
ANHUI MEIZHI PRECISION MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for permanent magnets using surface diffusion technology, the proportion of heavy rare earth elements still reaches 1%-3%, and the cost performance of permanent magnets is still low

Method used

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  • Permanent magnet for motors and rotor component with same, motor, and compressor
  • Permanent magnet for motors and rotor component with same, motor, and compressor
  • Permanent magnet for motors and rotor component with same, motor, and compressor

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Embodiment Construction

[0036] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention, but should not be construed as limitations to the present invention. Those of ordinary skill in the art can There are numerous changes, modifications, substitutions and variations to these embodiments, the scope of the present invention being defined by the claims and their equivalents.

[0037] In describing the present invention, it should be understood that the terms "length", "width", "upper", "lower", "inner", "outer", "axial", "circumferential", "axial ” and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the descriptio...

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Abstract

The invention discloses a permanent magnet for motors and a rotor component with the same, a motor, and a compressor. The main phase of the permanent magnet is neodymium iron boron, and the grain sizeof the main phase is less than or equal to four microns. The mass percentage of dysprosium and / or terbium in the permanent magnet is less than or equal to 0.5%. The intrinsic coercive force Hcj of the permanent magnet at 25 DEG C is greater than or equal to 1500kA / m. The permanent magnet provided by an embodiment of the invention can have less or no heavy rare earth elements, and has excellent performance and higher cost performance.

Description

technical field [0001] The invention relates to the field of compressors, in particular to a permanent magnet for a motor and a rotor assembly with it, a motor and a compressor. Background technique [0002] In the field of compressors, high energy efficiency is a long-term research and application topic. Therefore, it is a long-term research subject to improve the performance of the permanent magnet of the permanent magnet drive motor of the inverter compressor. At the same time, in order to achieve high reliability, rare earth permanent magnets added with heavy rare earth elements have long been the first choice for permanent magnets of permanent magnet motors used as high-performance compressors. On the one hand, heavy rare earth materials are strategic resources of the country; on the other hand, they are expensive, which makes the compressor equipped with the permanent magnet low cost performance. [0003] In order to meet the reliable operation of the compressor at h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27H02K1/02H02K7/04
CPCH02K1/02H02K1/2766H02K7/04H02K2213/03
Inventor 乔正忠郑立宇邱小华
Owner ANHUI MEIZHI PRECISION MFG