空间矢量调制的矩阵变换器闭环控制设计

为提高矩阵变换器的可靠性和实用性,从空间矢量调制的等效交-直-交原理出发,分析了矩阵变换器的空间矢量调制原理,提出了基于空间矢量调制的输出电压负反馈闭环控制方法.该方法将实际输出电压和期望输出电压的比较偏差作为负反馈加到下一个采样周期的开关调制函数矩阵中.利用Matlab软件仿真分析了该控制的正确性.采用数字信号处理器(DSP)芯片TMS320LF2407A实现了矩阵变换器的实验控制系统.

Design of Closed-Loop Control Method for Matrix Converter with Space Vector Modulation

For improving the dependability and practicability of the matrix converter, according to the space vector modulation method of the equivalent structure of the AC-DC-AC convertion, the principle of the space vector modulation method is investigated. A closed-loop output voltage control method based on the space vector modulation is proposed. The discrepancy between the actual output voltage and expected output voltage of the matrix converter is calculated and added to the switch modulation matrix in the next sampling period as feedback. The validities of the theoretical method are demonstrated by the simulation in Matlab software. In the end, the experimental control system based on DSP(TMS320FL2407A) are realized.