ORGANIZATION : 한국자동차공학회
JOURNAL :
YEAR : 2015.11
VOL :
PAGE : 1202~1205
Recently, the high power density and efficiency of interior permanent magnet synchronous motor (IPMSM) for
electric vehicle traction has been attracting attention. Particularly in order to overcome the cost issues of rare-earth dependent
on China, Magfine magnet, which consists of neodymium without Dysprosium (Dy) and has enhanced coercive force, has
been developed. However, Magfine magnet is vulnerable to irreversible demagnetization by external magnetic field. And it is
essential to prevent this phenomenon. This paper suggests a design using the magnetic flux barriers in order to decrease the
irreversible demagnetization of the permanent magnet (PM). Also, by using the 2-D finite element analysis (2-D FEA), it was
confirmed that the permanent magnet irreversible demagnetization characteristic of the proposed model is improved. Thus,
when advancing research in consideration of the Magfine fabrication process, it is expected that the commercialization of
Magfine magnet can be accelerated with a more accurate performance prediction.