Title :
High-performance front-end rectifier system for telecommunication power supplies
Author :
Choi, W.-Y. ; Kwon, J.-M. ; Kwon, B.-H.
Author_Institution :
Dept. of Electron. & Electr. Eng., Pohang Univ. of Sci. & Technol.
fDate :
7/1/2006 12:00:00 AM
Abstract :
A high-performance front-end rectifier system is proposed for telecommunication power supplies. The proposed system consists of a boost converter for power-factor correction (PFC) and a asymmetrical half-bridge zeta converter for DC-DC power conversion. A cost-effective implementation for a continuous-conduction-mode boost converter is proposed for a PFC circuit. With a simple passive approach, the proposed PFC circuit minimises switching losses by reducing the reverse-recovery current. The asymmetrical half-bridge zeta converter operates under zero-voltage switching for the power switches and its output diode commutates with zero-current switching. The proposed front-end rectifier system is analysed and its design considerations are discussed. Experimental results for a 300 W prototype at a constant switching frequency of 100 kHz are presented to verify the analysis and to show the performance of the proposed system
Keywords :
DC-DC power convertors; bridge circuits; diodes; losses; power factor correction; rectifying circuits; switching convertors; telecommunication power supplies; zero current switching; zero voltage switching; 100 kHz; 300 W; DC-DC power conversion; PFC; continuous-conduction-mode boost converter; diode commutation; front-end rectifier system; half-bridge zeta converter; power switches; power-factor correction; reverse-recovery current; switching losses; telecommunication power supplies; zero-current switching; zero-voltage switching;
Journal_Title :
Electric Power Applications, IEE Proceedings -
