矩阵变换器(Matrix Converter,MC)是一种具有理想性能的变换器,但其控制算法的复杂性限制了其在实际中的应用。MC的空间矢量调制策略中需要进行正弦函数、正切函数和复数运算,计算量大,增加了数字处理器的负担。本文通过对传统算法的分析研究,将占空比用三相输入电压值和三相参考输出电压值来计算,避免了复杂的正弦函数、反正切函数和复数计算。并给出了一种扇区划分方法,使得占空比表达式在各扇区内具有统一的形式,便于实际编程实现。仿真结果验证了简化算法的正确性。

Matrix converter(MC)is a kind of converter with ideal performance,but the application of MC is restricted by its complicated control strategy.The calculations of sin,arctangent and complex operation in space vector modulation increase the burden of digital signal processor.In this paper,conventional modulation algorithm is analyzed,and then the duty cycles are expressed by three phase input and output voltages.The proposed simplified algorithm avoided the calculations of sin,arctangent and complex operation.A kind method of sector partition is proposed and the duty cycles in each sector are expressed uniformly,which can simplify programming.Simulation results show that the proposed simplified algorithm is correct and effective.