Abstract：The steady-state reactance is one of the important parameters of permanent magnet (PM) motor. Compared to the induction motor, it’s more difficult to obtain the accurate steady-state reactance of the PM motor using the approach method for its complex structure and the coupled circuit. This paper analyses the cross-saturation effect and its impact on the electric motive force (EMF) base on a 22kW PM. The results reveal the disadvantage of using the regular phasor diagram to acquire the steady-state reactance of the PM motor. The PM will generates the EMF with the d-axis component when the PM motor is at saturation condition. The time-stepping finite element method (T-S FEM) is used to calculate this EMF. The improved phasor diagram is derived and the improved algorithm of the reactance calculation is proposed base on the T-S FEM. Compared to the results of the two methods, it shows that the improved phasor diagram method overcomes the deficiency of the traditional phasor diagram method and can be used for the steady-state reactance calculation of the PM motor.
李和明, 张健, 刘明基, 罗应立. 基于时步有限元的永磁同步电机稳态参数改进计算方法[J]. 电工技术学报, 2012, 27(4): 35-41.
Li Heming, Zhang Jian, Liu Mingji, Luo Yingli. An Improved Calculation Method for Steady-State Parameters of PMSM With T-S FEM. Transactions of China Electrotechnical Society, 2012, 27(4): 35-41.
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