Title :
The optimization of asymmetric half bridge converter
Author :
Chen, Weiyun ; Xu, Peng ; Lee, Fred C.
Author_Institution :
Bradley Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
Abstract :
The asymmetric half-bridge converter has been widely discussed because of its soft-switching characteristics. However, when operating within a wide input voltage range, its duty cycle range is correspondingly large, which deteriorates its performance. This paper features a detailed discussion of the relationship between performance and input voltage, and presents a new solution, which uses asymmetric turn-ratios in the integrated magnetic (IM) and can improve the efficiency by 2%. The design guidelines and optimization method are presented. A 1 kW (48 V/20 A) prototype is built and experimental waveforms verify the analysis
Keywords :
DC-DC power convertors; bridge circuits; circuit optimisation; switching circuits; 1 kW; 20 A; 48 V; asymmetric half-bridge converter circuit optimisation; asymmetric turn-ratios; design guidelines; duty cycle range; input voltage; integrated magnetic; performance; soft-switching characteristics; Bridge circuits; Capacitors; Power system analysis computing; Prototypes; Pulse width modulation converters; Stress; Switches; Switching converters; Virtual colonoscopy; Voltage;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2001. APEC 2001. Sixteenth Annual IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
0-7803-6618-2
DOI :
10.1109/APEC.2001.912446
