为提高永磁磁通切换电机中永磁体利用率，介绍了一种集成式“V”形永磁体磁通切换电机，分析了其结构特点，对电机绕组空载反电势、转矩特性、损耗以及效率等电磁性能进行了有限元分析并与常规12/10极磁通切换电机进行了比较。研究表明，相对于常规永磁磁通切换电机，该电机结构能有效提高永磁材料的利用率及功率密度。在相同线负荷下，该电机平均输出转矩提高了22．8%，转矩/永磁材料体积比值提高了26．3%，额定负载时输出功率能增加近24%，效率则下降2．1%。总体说来，该电机继承了永磁无刷类电机高效率、高转矩密度、高功率密度的特点，在电动汽车等新能源汽车领域具有应用前景。%In order to improve the PM usage efficiency in switched-flux permanent magnet machine, a new sandwiched switched-flux and V-shape permanent-magnet ( SSFVPM) machine was proposed and its to-pology was analyzed. Based on the finite element analysis ( FEA) , the back electromotive force ( EMF) , torque characteristics, total losses, and efficiency were investigated in details. The simulation results are compared with those of a conventional 12/10-pole flux-switching permanent-magnet ( FSPM) machine. It shows that the usage efficiency of magnets and power density are significantly increased. Compared with the conventional FSPM machine with the same electric loading, the average output torque and the ratio of torque/PM volume increase to 22. 8% and 26. 3% separately. Meanwhile, the efficiency of SSFVPM ma-chine shows a slight decrease of 2. 1%, while the output power increases nearly to 24%. Hence, the SS-FVPM machine still retains the merits of permanent magnet brushless machine of high efficiency, high torque density, and high power density, which makes the machine very promising for electric vehicles ( EVs) and other new energy electric vehicle applications.
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