永磁容错电机解耦控制研究

A Method for Implementing Torque Decoupling Control in Fault Tolerant Permanent Magnet Motor for Aircraft

多相永磁容错电机是一个多变量、强耦合、非线性的高阶电磁系统,其控制的关键是实现转矩的解耦控制。以六相八极永磁容错电机作为研究背景,通过六相静止坐标系到二相旋转坐标系的变换,在保持电机磁势和功率恒定的条件下,研究变换矩阵的计算方法,实现了永磁容错电机电流、磁链、转矩的解耦控制,为这种结构电机高性能的转矩控制和进一步的容错控制提供了一种新方法。

The key to the control of fault-tolerant permanent magnet motor （FTPMM） is, in our opinion, the implementation of the decoupling control of torque, which we propose to achieve through a novel faulttolerant topological structure in such a motor. In the full paper, we explain the method in some detail; in this abstract, we just add some pertinent remarks to listing the three topics of explanation. The first topic is： the structure of the FTPMM. In this topic, we present the structure of the FTPMM with six phases and eight poles, as shown in Fig. 1 in the full paper. The second topic is. the mathematical model of sixphase and eight-pole FTPMM. In this topic, we derive the equation for electromagnetic torque （eq. 4） and the equation of motion （eq. 5）. The third topic is. coordinates transformation. In this topic, under the condition that the magnetic force and the power of the motor remain unchanged, we transform six-phase static coordinates into two-phase rotational coordinates and calculate the transfer matrices as given in eqs. （12）, （15） and （18） in the full paper. The coordinates transformation simplifies the above mathematical model and achieves the decoupling control of the current, stator flux and torque of FTPMM. Finally we simulate the decoupling control, and the simulation results, shown in Figs. 5 through 9, indicate preliminarily that our novel method is effective for the decoupling control of stator flux and electromagnetic torque of the FTPMM.