感应电动机LPV直接转矩控制系统研究

Investigation on LPV Direct Torque Control of Induction Motor

随着鲁棒控制的发展技术,线性时变参数(LPV)控制方法也得到了一定的发展,并在处理非线性系统上取得了一些成果。将LPV控制引入感应电机直接转矩控制,设计了LPV转子电流估计器,利用定子电流的测量值和转子电流的估计值计算定子磁链和电磁转矩,实现全速范围内定子磁链的有效测量;结合定子电压空间矢量细分方法,可减少电磁转矩的脉动,实现了LPV直接转矩控制。最后通过仿真实例验证了该方法的正确性和有效性。

In recent years, linear parameter v （LPV） control have been developed with the development of robust control, and obtained some ments in non-linear systems control problems. The paper introduced LPV control to direct torque of an induction motor, designed a LPV rotor current estimator, calculated the stator flux and torque by the measured value of stator current and the estimation value of rotor current, and realized the efficient measurement of the stator flux on the whole speed. The LPV direct torque control used a method of stator voltage space vectors subdivision to decrease the torque pulsation. The simulation results proved the correctness and effectiveness of the LPV direct torque control.