Isolated bidirectional DC conversion circuit and control method thereof

• Main Authors: QIAO HAIBO, QIAN LEWEI, PENG DENGMING, ZHAO PENGTAO, CHEN FEI, YI JIANLEI, WAN CHENG
• Format: Patent
• Language: Chinese; English
• Published: 21.06.2024
• 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 provides an isolated bidirectional DC conversion circuit and a control method thereof. The isolation type bidirectional DC conversion circuit comprises a transformer, the primary side of the transformer is coupled with at least one first energy storage element and a primary side rectifier bridge composed of a plurality of first power switch devices, and the secondary side of the transformer is coupled with at least one second energy storage element and a secondary side rectifier bridge composed of a plurality of second power switch devices. And each of the plurality of first power switching devices and the plurality of second power switching devices is reversely connected in parallel with a body diode. The isolation type bidirectional direct current conversion circuit further comprises a plurality of first sampling resistors which are respectively arranged in an upper side bridge arm or a lower side bridge arm of the secondary side rectifier bridge; and the controller is configured to perform sw