全橋高頻鏈逆變電源的混合控制策略研究

摘要：對于全橋高頻鏈逆變器的控制，本文提出一種混合式正弦脈沖脈位調制控制策略，高頻變壓器傳遞SPWM波，根據對輸出電壓與電流進行過零比較與邏輯組合，得到周波變換器高頻和低頻混合驅動脈沖。介紹了全橋高頻鏈逆變器的工作原理，并應用MATLAB仿真軟件對電路進行控制算法的仿真，同時制作了容量為200VA的實驗樣機，仿真和實驗結果驗證了所提控制方案的可行性與正確性。 敘詞：全橋高頻鏈逆變器 正弦脈沖脈位控制 仿真 Abstract：A novel control strategy called hybrid sinusoidal pulse width phase modulation is proposed in this paper according to the control of full bridge high-frequency link inverter. SPWM wave is transmitted by the high-frequency transformer while the driving logic of the cycloconverter switches is determined by the zero comparison and logical combination of the output voltage and output current. So the driving signals of the cycloconverter switches are combined with low frequency pluses and high frequency ones. The operation principle of the full bridge high-frequency link inverter is analyzed and it is verified by the simulation results of 200VA prototype. Both of the results prove that hybrid control strategy is correct. Keyword：Full bridge high-frequency link inverter, Sinusoidal pulse width phase modulation, Simulation