Reducing turn off losses with a passive lossless snubber for boost converter

Generally in order to increase the power conversion density of a power electronic converter, the switching frequency is increased. By increasing switching frequency, switching losses increases which limits the achieved power density. Many methods exist which can reduce switching losses. Between these methods, passive lossless snubbers for PWM converters are preferred for their reliability and simplicity of the control circuit. In this paper a passive lossless snubber for boost converter which can provide zero voltage switching condition is introduced. The proposed converter is discussed in details and in order to justify the theoretical analysis a 200W prototype converter is simulated by PSPICE software.

[1]  F. C. Lee,et al.  Zero-voltage-switched quasi-resonant buck and flyback converters — Experimental results at 10 MHz1 , 1987, IEEE Power Electronics Specialists Conference.

[2]  E. Adib,et al.  Single-Switch Soft-Switched Isolated DC–DC Converter , 2012, IEEE Transactions on Power Electronics.

[3]  I. Barbi,et al.  An improved family of ZVS-PWM active-clamping DC-to-DC converters , 1998 .

[4]  Hosein Farzanehfard,et al.  Novel Family of PWM Soft-Single-Switched DC–DC Converters With Coupled Inductors , 2009, IEEE Transactions on Industrial Electronics.

[5]  H.S.-H. Chung,et al.  Passive Lossless Snubber for Boost PFC With Minimum Voltage and Current Stress , 2010, IEEE Transactions on Power Electronics.

[6]  Chien-Ming Wang.  A new family of zero-current-switching (ZCS) PWM converters , 2005, IEEE Transactions on Industrial Electronics.

[7]  Henry Shu-Hung Chung,et al.  A Passive Lossless Snubber Cell With Minimum Stress and Wide Soft-Switching Range , 2010 .

[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]  G. Moschopoulos,et al.  A new family of zero-voltage-transition PWM converters with dual active auxiliary circuits , 2005, Twentieth Annual IEEE Applied Power Electronics Conference and Exposition, 2005. APEC 2005..

[10]  Chern-Lin Chen,et al.  A passive lossless snubber cell for nonisolated PWM DC/DC converters , 1998, IEEE Trans. Ind. Electron..

[11]  Ehsan Adib,et al.  Family of isolated zero-voltage transition PWM converters , 2008 .

[12]  Ehsan Adib,et al.  Family of zero-voltage transition pulse width modulation converters with low auxiliary switch voltage stress , 2011 .

[13]  Ehsan Adib,et al.  Family of zero current zero voltage transition PWM converters , 2008 .

[14]  Chien-Ming Wang,et al.  New family of zero-current-switching PWM converters using a new zero-current-switching PWM auxiliary circuit , 2006, IEEE Transactions on Industrial Electronics.

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

[16]  Jae-Jung Yun,et al.  Improvement of Power-Conversion Efficiency of a DC–DC Boost Converter Using a Passive Snubber Circuit , 2012, IEEE Transactions on Industrial Electronics.

[17]  E.A.A. Coelho,et al.  Novel true zero current turn-on and turn-off converter family: analysis and experimental results , 2010 .

[18]  E. Adib,et al.  Family of Soft-Switching PWM Converters With Current Sharing in Switches , 2009, IEEE Transactions on Power Electronics.

[19]  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.