双桥矩阵变换器—异步电动机直接转矩控制策略的研究

在深入分析双桥矩阵变换器的拓扑结构特点和直接转矩控制基本原理的基础上,提出一种采用双桥矩阵变换器与异步电动机直接转矩控制相结合的新的调制策略,推导出双桥矩阵变换器整流级的调制算法和逆变级的直接转矩控制策略,此控制策略既可实现对异步电动机实施动态性能优良的直接转矩控制,又可获得良好的输入电流波形和可调的功率因数.仿真结果验证了所提控制策略的正确性和可行性.

Research on controlling strategy of dual bridge matrix converter-direct torque control of asynchronous motor

After the characteristics of the dual bridge matrix convertor topology and the theory of direct torque control are deeply analyzed,a new control strategy that combines the matrix convertor with the direct torque control is proposed in the paper.The algorithm for the rectifier side and the direct torque control method for the inverter side are deduced.This strategy can implement the direct torque control of asynchronous machine with excellent dynamic performance,and have good input currents and an adjustable power factor.Simulation results demonstrate the strategy is correctly and feasible.