Zero-voltage- and zero-current-switched PWM DC-DC converters using active snubber

A novel active snubber soft-switched method is proposed to achieve zero-voltage and zero-current switching (ZV-ZCS) for pulsewidth modulation (PWM) DC-DC power converters. The unique location of the snubber capacitor and inductor ensures low current stress and commutation losses in the auxiliary circuit. A boost converter adopting this technique is presented as an example, to illuminate its operation principles and derive the design procedures. Simulation and hardware implementation of a 350-W 150-kHz boost converter have been made to validate the operation and the efficiency improvement. Some other basic PWM DC-DC topologies with the proposed snubber are also been given.

[1]  V.J. Farias,et al.  A family of PWM soft-single-switched converters with low voltage and current stresses , 1997, PESC97. Record 28th Annual IEEE Power Electronics Specialists Conference. Formerly Power Conditioning Specialists Conference 1970-71. Power Processing and Electronic Specialists Conference 1972.

[2]  Fred C. Lee,et al.  Novel zero-voltage-transition PWM converters , 1992 .

[3]  C. Q. Lee,et al.  Zero-voltage-transition converters using an inductor feedback technique , 1994, Proceedings of 1994 IEEE Applied Power Electronics Conference and Exposition - ASPEC'94.

[4]  Ivo Barbi,et al.  A new family of ZVS-PWM active-clamping DC-to-DC boost converters: analysis, design, and experimentation , 1996, Proceedings of Intelec'96 - International Telecommunications Energy Conference.

[5]  M. M. Jovanovic.  A technique for reducing rectifier reverse-recovery-related losses in high-voltage, high-power boost converters , 1997, Proceedings of APEC 97 - Applied Power Electronics Conference.

[6]  N. H. Kutkut,et al.  Design considerations for power converters supplying the SAE J-1773 electric vehicle inductive coupler , 1997, Proceedings of APEC 97 - Applied Power Electronics Conference.

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

[8]  D. Tollik,et al.  High efficiency telecom rectifier using a novel soft-switched boost-based input current shaper , 1991, [Proceedings] Thirteenth International Telecommunications Energy Conference - INTELEC 91.

[9]  J. A. Bassett.  New, zero voltage switching, high frequency boost converter topology for power factor correction , 1995, Proceedings of INTELEC 95. 17th International Telecommunications Energy Conference.

[10]  I. Barbi,et al.  A family of DC-to-DC PWM converters using a new ZVS commutation cell , 1993, Proceedings of IEEE Power Electronics Specialist Conference - PESC '93.