基于模糊空间矢量调制的直接转矩控制方案

提出了一种基于模糊空间矢量调制(SVM)技术的异步电机直接转矩控制(DTC)方案。传统SVM-DTC中使用两个PI控制器来产生参考电压矢量的两个分量。设计了转矩模糊控制器代替原有的转矩PI控制器,并给出了基于此模糊控制器的SVM-DTC系统。该转矩模糊控制器的输入是转矩误差与转矩误差变化率,输出为参考电压矢量的转矩分量。针对所提出的方案进行了仿真实验,并与传统SVM-DTC相比较。仿真结果表明该模糊SVM-DTC方案能够提高系统的鲁棒性。

Direct Torque Control of Induction Motors Based on Fuzzy Space Vector Modulation Technology

A new direct torque control (DTC) strategy of induction motors based on fuzzy space vector modulation (SVM) technology was proposed. In conventional SVM-DTC, two PI controllers are used to generate the two components of reference voltage vector. A torque fuzzy logic controller was designed to substitute the original torque PI controller, and a fuzzy SVM-DTC system based on the fuzzy controller was given. The torque fuzzy controller has two inputs (torque error and its change rate) and one output (the torque component of reference voltage vector). Finally, simulations were carried out to verify the proposed strategy, and the simulation results were compared with conventional SVM-DTC. The simulation results indicate that the proposed fuzzy SVM-DTC strategy can improve the system robustness.