Unified steady-state model and DC analysis of half-bridge DC-DC converters with current doubler rectifier

Half-bridge DC-DC converter with a current doubler rectifier is suited for low-voltage high-current on-board DC-DC converters. In this paper, a unified steady-state model for both asymmetric and symmetric half-bridge DC-DC converter is derived, and the converter DC solution is obtained. Based on the steady-state solution, several issues, such as inductor current sharing and transformer DC bias of magnetizing current, are addressed. In addition, a series of design rules resulting from mathematical analysis are discussed. The analysis is verified by simulation and experimental results.

[1]  Wei Chen,et al.  ZVS analysis of asymmetrical half-bridge converter , 2001, 2001 IEEE 32nd Annual Power Electronics Specialists Conference (IEEE Cat. No.01CH37230).

[2]  Peng Xu,et al.  A novel current-sharing control technique for low-voltage high-current voltage regulator module applications , 2000 .

[3]  R. D. Middlebrook.  Small-signal modeling of pulse-width modulated switched-mode power converters , 1988 .

[4]  V. Meleshin,et al.  Small-signal modeling of soft-switched asymmetrical half-bridge DC/DC converter , 1995, Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95.

[5]  Milan M. Jovanovic,et al.  Design and performance evaluation of low-voltage/high-current DC/DC on-board modules , 1999, APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285).

[6]  F. Lee,et al.  Design considerations of transformer DC bias of forward converter with active-clamp reset , 1999, APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285).

[7]  J. Sebastian,et al.  An overall study of the half-bridge complementary-control DC-to-DC converter , 1995, Proceedings of PESC '95 - Power Electronics Specialist Conference.