基于矩阵式变换器的异步电机电流滞环跟踪矢量控制

Current Hysteresis Band Vector Control of the Asynchronous Motors Based on the Matrix Converter

采用混合控制策略将矩阵式变换器用于驱动和控制异步电机。将矩阵式变换器等效为虚拟交-直-交变换,对其虚拟整流侧采用空间矢量调制方法,对其虚拟逆变侧则采用电流滞环跟踪矢量调制,最后通过开关译码得到矩阵变换器的9个开关管的控制信号。仿真结果验证了控制方法的可行性和有效性:调速系统具有较好的动态特性,电网输入端功率因数为1。

The mixing control strategy has been introduced in this paper for MC fed induction motor drive systems. The strategy transform the traditional MC topology into an equivalent AC-DC-AC one, the combination of a virtual rectifier and a virtual inverter. At the side of rectifier, the Space Vector Modulation control method, and the current hysteresis band PWM control method of the inverter are used. At last, the control signals of the MC＇ s nine bidirectional switches is obtained. The simulation results have proved that the drive system has perfect dynamic and static characteristics, the mixing control strategy is feasible and effective for this system.