新型双齿可变磁通记忆电机电磁性能分析

Analysis of electromagnetic performance of novel double-tooth variable flux memory machine

针对传统可变通记忆电机(variable flux memory machine,VFMM)电磁转矩性能低的问题,提出了一种新型双齿可变磁通记忆电机。首先介绍了新型双齿VFMM的拓扑结构和工作原理;随后应用2-D有限元分析方法,对比分析了新型双齿VFMM与传统单齿VFMM在低矫顽力(low coercive force,LCF)永磁体处于不同磁化状态下的空载特性,并对比了增磁状态下的电磁转矩;最后分析了双齿VFMM的转矩/转速和功率/转速特性。相对于传统单齿的可变磁通记忆电机而言,双齿可变磁通记忆电机的调磁系数增加了1倍多,相同电流下的电磁转矩提高了21.8%。结果表明:新型双齿VFMM具有良好的调磁性能和较大的输出转矩能力。

Aiming at the problem of the low electromagnetic torque performance of the traditional variable flux memory machine(VFMM),a novel double-tooth variable flux memory machine is proposed.Firstly,the topology and operation principle of the novel double-tooth variable flux memory machine are introduced.By using the 2-D finite element analysis method,the open circuit characteristics of the novel double-tooth VFMM and the traditional single-tooth VFMM with low coercive force(LCF)in different magnetization states are compared and analyzed,and the electromagnetic torque in the flux-enhanced state is studied.The research on the torque/speed and power/speed characteristics of double-tooth VFMM is carried out.Compared with the traditional single-tooth VFMM,the flux adjustment ability of the double-tooth VFMM is more than doubled,and the electromagnetic torque under the same current is increased by 21.8%.The results show that the double-tooth VFMM has better flux adjustment ability and larger electromagnetic torque.