六相感应电机直接转矩控制系统

Direct Torque Control System of 6-Phase Induction Motor

电压源型逆变器驱动的六相感应电机有64个综合电压矢量,对准"定子电流谐波最小"这一控制目标,选择机电能量转换子空间(dq子空间)的12个最大矢量进行合成,得到12个零序平衡矢量。在此基础上,优化设计出一种新型六相直接转矩控制(DTC)系统,使零序子空间(z1z2,o1o2子空间)的定子谐波电流小,从而有效控制定子损耗、减小转矩脉动。在Simulink环境下建立起各部分仿真模块和总体仿真模型,仿真结果验证了控制策略的正确性和有效性。

There were 64 voltage space vectors in 6-phase induction motor fed by CSI. The 12 maximal vectors in d-q subspace were selected and combined,then the 12 zero-sequence balancing vectors were gained. A novel 6- phase direct torque contro system was designed through optimum design. The stator harmonic current in z1-z2 and o1-o2 subspace was small,then the stator loss was controlled effectively. The system simulation model was made and the simulation results showed the effectiveness of the new control strategy.