【摘要】 通过对矩阵式变换器中9个双向开关的逻辑控制,可实现其电压和频率的变换。依据输入非平衡、输出平衡时矩阵变换器的工作原理,用Matlab建立输入非平衡时矩阵变换器分别采用输入电流偏置角固定和输入电流偏置角动态调整两种空间矢量调制策略仿真模型。仿真结果和频谱分析表明:与输入电流偏置角固定的调制策略相比,输入电流偏置角动态调制法策略能有效减少输入电流谐波。更多还原

【Abstract】 Voltage and frequency conversion can be implemented by logical controlling the9bi - direction switches of the matrix converter.According to the working principle under the condition of unbalanced inputs and balanced outputs,the simulation models for two vector modulation policies are built in Matlab,in which the input current displacement angle is fixed or dynamically tuned correspondingly.The simulative results and the spectrum analysis prove that the model with current displacement angle tuned dynamically can restrain the input harmonic more efficiently than that with the current displacement angle fixed.The project is supported by the project of Hunan province Bureau of Education(03C462).更多还原