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.
[1]
Peng Xu,et al.
Topologies and design considerations for distributed power system applications
,
2001,
Proc. IEEE.
[2]
T. Chow,et al.
A comparative evaluation of new silicon carbide diodes and state-of-the-art silicon diodes for power electronic applications
,
1999,
Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370).
[3]
Tore Undeland,et al.
Power Electronics: Converters, Applications and Design
,
1989
.
[4]
Chern-Lin Chen,et al.
Improved asymmetrical half-bridge converter using a tapped output inductor filter
,
2003
.