Direct current/direct current voltage reduction soft switch conversion circuit and control method

• Main Authors: LI SONGSONG, WAN ZUYI, YU HAODONG, MA XIANHONG, LIU LIN
• Format: Patent
• Language: Chinese; English
• Published: 10.05.2019
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

The invention discloses a direct current/direct current voltage reduction soft switch conversion circuit. The direct current/direct current voltage reduction soft switch conversion circuit comprises apower module and a control module, wherein the power module comprises two paths and multiple paths of voltage reduction circuits and energy storage elements which are arranged in a staggered mode; each path of voltage reduction circuit comprises a first switch element, a second switch element and an inductor; the direct current voltage input to the voltage reduction circuits passes through the first switch elements, the inductors and the energy storage elements and then is output; and the control module is used for sampling the current of the second switch element to turn off the second switch element and to delay the switching-on of the first switch element. According to the circuit, uncontrollable reverse recovery current can be eliminated in the voltage reduction circuits, and the zero-voltage switching-on of