Optimization of average and cogging torque in 3-phase IPM motor drives
Optimization of average and cogging torque in 3-phase IPM motor drives
复制标题
三相 IPM 电机驱动器中平均扭矩和齿槽扭矩的优化
DOI：
10.1109/ias.2002.1044120
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
H. Toliyat
中科院分区：
文献类型：
--
作者：
L. Parsa;L. Hao;H. Toliyat
本文对牵引用内嵌式永磁无刷直流电动机进行了分析。考察了磁化方向、定子槽数和电流波形对转矩脉动的影响。研究中考虑了三相四极IPM电机。采用有限元法计算了电机的转矩、磁阻转矩、背铁磁通密度、齿磁通密度、制动器转矩和反电动势。结果表明，由于转子显著性产生的磁阻转矩，转矩角曲线的峰值点向左偏移。因此，仅仅考虑定子和转子MMF的方向并保持它们之间的直角是不可能找到开关瞬间的。开发了一个Matlab程序来计算开关间隔，使其产生最大平均转矩和最小齿槽转矩。本文给出了支持仿真结果的实验结果。
In this paper, an interior permanent magnet (IPM) brushless DC motor for traction applications is analyzed. The effect of magnetization direction, number of stator slots and current waveform on torque pulsation are examined. A three-phase, four-pole IPM motor is considered for the study. The finite element method is used to calculate the torque, reluctance torque, back iron flux density, tooth flux density, detent torque and back-EMF of the motor. It is shown that because of the reluctance torque resulting from rotor saliency, the peak point in the torque-angle curve is shifted to the left. Therefore, it is not possible to find the switching instants just by considering the direction of stator and rotor MMF and keeping the right angle between them. A Matlab program has been developed to rind the switching intervals, which will produce the maximum average torque and minimum cogging torque. Experimental results to support the simulation findings are included in the paper.