Title :
Research on combined pole for interior permanent-magnet machine
Author :
Zheng, P. ; Lin, Z. ; Sui, Y.
Author_Institution :
Harbin Inst. of Technol., Harbin, China
Abstract :
Owing to the advantages of high power density and salient field-weakening performance, interior permanent-magnet (IPM) machines are widely applied in electric vehicles (EVs). However, rare-earth permanent magnets can be demagnetized irreversibly because of large demagnetizing current and high temperature. Hence, this paper proposes a combined pole IPM machine which can improve the demagnetization withstand capability. The combined pole adopts hybrid NdFeB and ferrite magnets to improve the air-gap flux density, further improving the machine performances. Based on finite-element analysis (FEA), the machine performances are evaluated and compared with those of the conventional shaped pole machines.
Keywords :
boron alloys; demagnetisation; ferrite devices; ferrites; finite element analysis; iron alloys; magnetic flux; neodymium alloys; permanent magnet machines; FEA; NdFeB-Fe3O4; air-gap flux density; combined pole interior permanent-magnet machine; demagnetizing current; electric vehicles; ferrite magnets; field-weakening performance; finite-element analysis; power density; rare-earth permanent magnets; Air gaps; Demagnetization; Ferrites; Magnetic flux; Magnetic separation; Saturation magnetization; Torque;
Conference_Titel :
Magnetics Conference (INTERMAG), 2015 IEEE
Print_ISBN :
978-1-4799-7321-7
DOI :
10.1109/INTMAG.2015.7157423
