High gain soft switching DC converter and control method thereof

The invention relates to a high gain soft switching DC converter and a control method thereof. The high gain soft switching DC converter comprises a DC input power supply, a first switching tube, a second switching tube, a third switching tube, a fourth switching tube, a first diode, a second diode, a third diode, a first inductor, a second inductor, a first capacitor, a second capacitor, a thirdcapacitor, a fourth capacitor, a coupling inductor and a load. The high gain soft switching DC converter has the advantages of high voltage gain, low input current ripple, high conversion efficiency,low voltage stress of the switching device and the like by controlling the four switching tubes and the four switching tubes can realize zero voltage soft switching so as to be quite suitable for thenon-isolated renewable energy power generation system. 本发明涉及一种高增益软开关直流变换器及其控制方法。所述高增益软开关直流变换器包括直流输入电源、第一开关管、第二开关管、第三开关管、第四开关管、第一二极管、第二二极管、第三二极管、第一电感、第二电感、第一电容、第二电容、第三电容、第四电容、耦合电感及负载。通过对四个开关管的控制，本发明的高增益软开关直流变换器具有高电压增益、低输入电流纹波、高变