LLC resonant converter with high conversion efficiency

• Main Author: PAN YIAN
• Format: Patent
• Language: Chinese; English
• Published: 18.03.2022
• 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 mainly provides a high-efficiency LLC resonant converter, according to the design of the invention, an error amplification unit generates an adjusting voltage signal according to a voltage difference detected from two ends of a detection unit and transmits the adjusting voltage signal to a first control unit, so that the first control unit obtains a current load rate according to the adjusting voltage signal. Continuously, a second control unit receives a first adjusting signal transmitted by the first control unit through a first isolation feedback unit, so that a switch assembly control signal is generated and transmitted to a switch assembly in the direct current supply unit, and the switch assembly is controlled to adjust an output voltage of the direct current supply unit; the LLC resonant converter can maintain a conversion efficiency greater than or equal to 98% under any load condition. 本发明主要提供一种高效率LLC谐振转换器，依据本发明的设计，一误差放大单元依据检测自一检出单元两端的一电压差而产生一调整电压信号从而传送至一第一控制单元，使该第一控制单元依据该调整电压信号而获知一当前负载