Analysis of local demagnetization in magnet for PM-assisted synchronous reluctance motors

H. T. Anh, M. Hsieh

研究成果: Conference contribution

1 引文 斯高帕斯(Scopus)

摘要

This digest investigates the demagnetization risk of permanent magnet-assisted synchronous reluctance machines (PMa-SynRM). PMa-SynRM is often designed with multilayer PMs/flux barriers to increase saliency and reluctance torque. Weaker or less PM (than that for IPM motor) is embedded into the rotor of PMa-SynRM, which can be demagnetized during high-performance operation (e.g., high armature reaction or current phase advance control). Demagnetization possibility of PM depends on factors such as temperature, armature current and design operating points and mostly occurs combining some of the above factors. The temperature distribution across the PM can be different and the operating points at different locations in the PM can also vary. This very likely causes local demagnetization within a PM. This work proposes a method to evaluate the demagnetization risk within a PM for all the PM layers of PMa-SynRM rotors. A model based on the magnetic circuit is first developed to calculate the operating points across the PM at the no-load and loaded condition. The magnet temperature distribution is then estimated with a commercial software. With the temperature and loaded operating points ofthe PM, the risk of local demagnetization can be predicted. This is validated using finite element analysis. From the analysis, a design method that can avoid demagnetization is then proposed. Experimental studies are conducted to validate the simulations.

原文English
主出版物標題2018 IEEE International Magnetic Conference, INTERMAG 2018
發行者Institute of Electrical and Electronics Engineers Inc.
ISBN(電子)9781538664254
DOIs
出版狀態Published - 2018 十月 24
事件2018 IEEE International Magnetic Conference, INTERMAG 2018 - Singapore, Singapore
持續時間: 2018 四月 232018 四月 27

出版系列

名字2018 IEEE International Magnetic Conference, INTERMAG 2018

Conference

Conference2018 IEEE International Magnetic Conference, INTERMAG 2018
國家Singapore
城市Singapore
期間18-04-2318-04-27

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation

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