电工技术学报2022，Vol.37Issue(5)：1145-1157,13.DOI:10.19595/j.cnki.1000-6753.tces.210330
稀土和铁氧体混用永磁辅助同步磁阻电机
A Hybrid PM-Assisted SynRM with Ferrite and Rare-Earth Magnets
摘要
Abstract
The inherent feature of high efficiency over wide speed range positions permanent-magnet-assisted synchronous reluctance machine (SynRM) as an appealing contender for high-performance variable speed applications. Though the magnets are for assistance only, their characteristics have a significant effect on the machines, e.g., the rare-earth magnet encounters high cost and volatile supply chain issues while the ferrite one faces low energy product and demagnetization problems. This paper proposes a new hybrid PM-assisted SynRM by taking into consideration the effect from the large magnetic characteristic difference between the rare-earth and ferrite magnet materials. The anti-demagnetization capability of the machine can be significantly improved by allocating rare-earth magnets in the barriers adjacent to rotor outer periphery. Comprehensive analysis results have indicated an optimal ratio of slightly above 5％ between rare earth and ferrite magnet volumes strikes a balance between the anti-demagnetization capability and the cost per Newton-Meter for such hybrid machine. A hybrid prototype with 5.5％ rare-earth magnet volume ratio is designed to compare with its existing conventional counterparts which employ ferrite and rare-earth magnets individually. Both the finite element analysis and experimental results have revealed that all three machines have almost identical performance, but the hybrid machine has evidently enhanced the demagnetization withstanding capability over the ferrite PM-assisted SynRM and significantly reduced the magnet cost over the rare-earth one.关键词
永磁辅助同步磁阻电机/退磁/铁氧体/稀土永磁/混用效应Key words
Permanent-magnet-assisted synchronous reluctance machine/demagnetization/ferritemagnet/rare-earth magnet/hybrid effect分类
信息技术与安全科学引用本文复制引用
林迎前,孙毅,王云冲,沈建新..稀土和铁氧体混用永磁辅助同步磁阻电机[J].电工技术学报,2022,37(5):1145-1157,13.基金项目
This work was supported by the Natural Science Foundation of China under the grants of 51837010 and 51690182. （）
