This paper analyzes the performance of a synchronous reluctance motor (SynRM)\nequipped with a limited amount of a permanent magnet (PM). This is conventionally implemented\nby inserting PMs in rotor flux barriers, and this is often called the PM-assisted SynRM (PMa-\nSynRM). However, common PMa-SynRMs could be vulnerable to irreversible demagnetization.\nTherefore, motor performance and PM demagnetization should be simultaneously considered, and\nthis would require the PM to be properly arranged. In this paper, various rotor configurations are\ncarefully studied and compared in order to maximize the motor performance, avoid irreversible\ndemagnetization and achieve higher PM utilization. Moreover, the field weakening capability is\ninvestigated and improved by regulating armature excitation. A particular rotor type with flux\nintensification was found to possess higher PM utilization, lower demagnetization possibility with\nfairly high performance. Thus, suitable rotor configurations are recommended for certain\napplications.
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