在輸入側將矩陣變換器等效為一個buck 型PWM 整流器，推導出了采用LC 濾波器的矩陣變換器輸入電流與輸出電流及輸入電壓之間的傳遞函數關系。給出了輸入濾波器中的電感及電容參數選擇方法。分析表明若輸入濾波器僅采用LC 電路將導致諧振頻率附近輸入電流振蕩，引起系統不穩定。給出了一種帶阻尼的輸入濾波器的設計方法并進行了仿真驗證。同時分析了矩陣變換器的電磁傳導發射EMI 特性，指出工業化的矩陣變換器需要加裝EMI
波器。
Abstract: Regrad the matrix converter (MC) as a buck type PWM rectifier in the input side, the transfer fuction of input current using LC input filter was deduced. The parameter setting method of inductor and capacitor was presented. It was verified that the input current will osciliate near the resonant frequency in very low damping factor conditon and a method to improve the damping factor of input filter was then presented. The validity of improved method was verified by compter
simulation and the start up charactaristic of input filter was analyzed. The EMI characteristic of MC was analyzed and it was verified that the input EMI filter is necessary in industrial matrix converters.
關鍵詞﹕矩陣變換器；輸入濾波器；阻尼系數；EMI
Keywords: matrix converter; input filter; damping factor; EMI