A new separated resonant-inductor winding phase shift full bridge converter for server power system

A new separated resonant-inductor winding (SRW) phase shift full bridge (PSFB) converter for the server power system is proposed in this paper. Since DC/DC converter of server power system is operated with high input voltage and large output current, zero voltage switching (ZVS) operation of the primary switches and low conduction loss of secondary rectifiers are essential to achieve high power density and high efficiency. As a result, among many topologies, PSFB converter with additional resonant inductor and clamping diodes, which can achieve ZVS operation and low voltage stress of secondary rectifiers, is widely used. However, since the high input voltage with small duty ratio is applied to the additional resonant inductor, high eddy current loss and excess eddy current loss are occurred on magnetic core. Therefore, bulky and high cost magnetic core is required for additional resonant inductor. To overcome this drawback, the proposed converter implements the additional resonant inductor and transformer using only one magnetic core. Therefore, size, cost and core loss of the additional resonant inductor can be reduced. Experimental results demonstrate that the proposed SRW PSFB converter can achieve high power density and high efficiency in a 1200W (12V, 100A) prototype converter.

[1]  K. M. Smith,et al.  Engineering design of lossless passive soft switching methods for PWM converters. I. With minimum voltage stress circuit cells , 1998, APEC '98 Thirteenth Annual Applied Power Electronics Conference and Exposition.

[2]  Martin F. Schlecht,et al.  A 1 kW, 500 kHz front-end converter for a distributed power supply system , 1989, Proceedings, Fourth Annual IEEE Applied Power Electronics Conference and Exposition.

[3]  W.A. Roshen,et al.  A practical, accurate and very general core loss model for nonsinusoidal waveforms , 2007, Twentieth Annual IEEE Applied Power Electronics Conference and Exposition, 2005. APEC 2005..

[4]  Song-Yi Lin,et al.  Analysis and design for RCD clamped snubber used in output rectifier of phase-shift full-bridge ZVS converters , 1998, IEEE Trans. Ind. Electron..

[5]  Xiangning He,et al.  Single phase three-level power factor correction circuit with passive lossless snubber , 2002 .

[6]  R. Redl,et al.  A novel soft-switching full-bridge DC/DC converter: Analysis, design considerations, and experimental results at 1.5 kW, 100 kHz , 1990, 21st Annual IEEE Conference on Power Electronics Specialists.

[7]  Gun-Woo Moon,et al.  Voltage Oscillation Reduction Technique for Phase-Shift Full-Bridge Converter , 2007, IEEE Transactions on Industrial Electronics.

[8]  K. Smedley,et al.  Engineering Design of Lossless Passive Soft Switching Methods for PWM Converters—Part II. With Non-Minimum Voltage Stress Circuit Cells , 2001 .

[9]  Allen R. Hefner,et al.  SiC power diodes provide breakthrough performance for a wide range of applications , 2001 .

[10]  K. Fujiwara,et al.  A novel lossless passive snubber for soft-switching boost-type converters , 1999 .

[11]  K. M. Smith,et al.  Properties and synthesis of passive lossless soft-switching PWM converters , 1999 .

[12]  Oscar Garcia,et al.  Single phase power factor correction: a survey , 2003 .

[13]  C.R. Sullivan,et al.  Improved calculation of core loss with nonsinusoidal waveforms , 2001, Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248).

[14]  F.C. Lee,et al.  Design considerations for high-voltage high-power full-bridge zero-voltage-switched PWM converter , 1990, Fifth Annual Proceedings on Applied Power Electronics Conference and Exposition.

[15]  Chih-Lung Shen,et al.  Analysis, design, and practical considerations for 500 W power factor correctors , 2003 .

[16]  M. Corradin,et al.  Performance evaluation of a Schottky SiC power diode in a boost PFC application , 2002 .