Rare-earth-free Al-Ni-Co hybrid PMa-SyRM for an air-conditioner compressor

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-01-12 DOI:10.1049/elp2.12420

Gowtham Vegireddy, Sashidhar Sampathirao

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Abstract

A hybrid ferrite-Al-Ni-Co permanent magnet assisted synchronous reluctance motor (PMa-SyRM) for an air-conditioner compressor is proposed. Al-Ni-Co PMs have high residual flux density similar to rare-earth PMs such as Nd-Fe-B and Sm-Co. Therefore, the performance parameters of the PMa-SyRM such as power factor, efficiency etc., with Al-Ni-Co PMs can be improved without significantly increasing the cost of the motor. However, Al-Ni-Co PMs have a steep II^nd-quadrant B-H curve, and the challenge lies in addressing their demagnetisation issues. In the proposed hybrid PMa-SyRM, the rotor geometry is suitably optimised for placing the Al-Ni-Co PMs in the centre flux barriers to address the demagnetisation issues. Further, an analytical magnetic circuit is presented to design the proposed PMa-SyRM. Later, 2-D finite element analysis of the proposed motor including the demagnetisation analysis of PMs and stress analysis of the rotor is carried out and presented. A prototype is fabricated, experimental validation is carried out, and the results of the performance and cost are compared with that of ferrite and hybrid ferrite-Nd-Fe-B PMa-SyRM.

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用于空调压缩机的无稀土铝-镍-钴混合 PMa-SyRM

本文提出了一种用于空调压缩机的铁氧体-铝镍钴混合永磁辅助同步磁阻电机（PMa-SyRM）。铝镍钴永磁具有与钕铁硼和钐钴等稀土永磁相似的高剩余磁通密度。因此，使用铝镍钴永磁体的 PMa-SyRM 的功率因数、效率等性能参数可以在不显著增加电机成本的情况下得到改善。然而，铝镍钴永磁体的第 II 象限 B-H 曲线较陡，解决其退磁问题是一项挑战。在所提出的混合永磁-超导电机中，转子的几何形状经过适当优化，将铝镍钴永磁体置于中心磁通势垒中，以解决退磁问题。此外，还提出了一种分析磁路，用于设计建议的永磁同步磁共振。随后，对拟议的电机进行了二维有限元分析，包括永磁体的退磁分析和转子的应力分析。制作了原型，进行了实验验证，并将性能和成本结果与铁氧体和混合铁氧体-钕铁硼 PMa-SyRM 进行了比较。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.