Topology switching method and device of full-bridge CLLC resonant converter

• Main Authors: LI SHAOHUI, KONG MING, CAO HAIJUN, WU CHUNHUAN
• Format: Patent
• Language: Chinese; English
• Published: 05.11.2021
• 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 topology switching method and device for a full-bridge CLLC resonant converter. The method for switching a half-bridge topology to a full-bridge topology comprises the steps of: enabling the converter to keep the half-bridge topology unchanged if the current output voltage is lower than the highest output voltage of the half-bridge topology; and if the required output voltage is higher than the highest output voltage of the half-bridge topology, entering a process of switching the half-bridge topology to the full-bridge topology. The method for switching the full-bridge topology to the half-bridge topology comprises the following steps that: if the current output voltage is higher than the lowest output voltage of the full-bridge topology, enabling the converter to keep the full-bridge topology unchanged; and if the required output voltage is lower than the lowest output voltage of the full-bridge topology, entering a process of switching the full-bridge topology to the half-bridge t