부산대학교 도서관

Variable-flux permanent magnet synchronous machine (VF-PMSM) is a promising candidate for adjustable speed applications, which utilizes low coercivity $(\boldsymbol{H_{c}})$ magnets to enable the flexible magnetic flux regulation. Aiming at providing some useful insight into the usage of low-$\boldsymbol{H_{c}}$ magnets in VF-PMSMs, this paper firstly gives a comparison of different low-$\boldsymbol{H_{c}}$ magnets not only in terms of general properties but also practical application characteristics in VF-PMSMs. Then, an investigation of electromagnetic performance of VF-PMSMs employing different types of low-$\boldsymbol{H_{c}}$ magnets is carried out. Low-$\boldsymbol{H_{c}}$ magnet design considerations for VF-PMSMs based on distinguishing PM characteristics are also given.