不同绕组连接方式下的六相永磁同步电动机MT容错控制

多自由度使多相电机具备了优异的容错能力。本文针对单中性点、双中性点及开端绕组结构的六相永磁同步电机,以缺相容错运行时输出转矩最大为目标,提出一种适用于不同绕组结构电机的容错电流计算通用表达式。通过对六相永磁同步电机缺一相故障状态下的自由度进行分析,计算了不同定子绕组结构下的容错电流,并给出相应的控制方法。对比三种不同绕组结构电机容错运行时的带载能力,开端绕组结构的六相永磁同步电机缺相容错运行时输出转矩最大。利用Matlab/Simulink建立了六相永磁同步电机模型及其控制系统,验证了计算结果的有效性。

The MT Fault Tolerant Control of Six-phase Permanent Magnet Synchronous Motor with Different Winding Connection Modes

The degree of freedom makes the multi-phase motor have excellent fault tolerance.In this paper,aiming at the single neutral point,double neutral point and starting winding structure of the six-phase permanent magnet synchronous motor,a general expression for the calculation of fault-tolerant current applicable to the motors with different winding structure is proposed in order to maximize the output torque when running without phase tolerance.Based on the analysis of the degree of freedom of the six-phase permanent magnet synchronous motor in the state of a1 phase fault,the fault-tolerant currents of different stator windings are calculated,and the corresponding control methods are given.Compared with the load capacity of three kinds of motors with different winding structure,the output torque of phase fault tolerant of the starting winding structure is the largest.The six-phase permanent magnet synchronous motor model and its control system were established by using Matlab/Simulink,which verified the validity of the calculated results.