Static performance and parasitic analysis of tapped-inductor converters

Tapped-inductor provides the property of wider voltage conversion range similar to an auto-transformer and can be integrated to a switched-mode power converter to enhance the power conversion efficiency. Its low component count has attracted applications with extreme voltage conversion ratios. Circuit family is presented and a general tapping concept for diode, transistor or both has been described. Its boost converter version is used as an example for the study. Detailed comparisons between tapped-inductor boost and conventional boost are carried out, which include the comparison of voltage gain, component stress and efficiency with the presence of the parasitic components. Experimental results present solid verification of the analysis of performance of tapped-inductor boost converter under extreme conversion ratios. The proposed study has introduced formulations for both transistor and diode tapping and can be extended to other tapped-inductor DC-DC converters as a family of circuits, and thus provides an understanding of the effect of the parasitic components that affect the efficiency under extreme conversion ratio.

[1]  Duncan A Grant,et al.  Inverse Watkins-Johnson converter - analysis reveals its merits , 2003 .

[2]  B.H. Cho,et al.  Non-isolation Soft-switching Buck Converter with Tapped-Inductor for Wide-input Extreme Step-down applications , 2005, 2005 IEEE 36th Power Electronics Specialists Conference.

[3]  Bo-Hyung Cho,et al.  The zero Voltage switching (ZVS) critical conduction mode (CRM) buck Converter With tapped-inductor , 2005 .

[4]  S. Pattnaik,et al.  Analysis of Non-isolated Soft Switching DC-DC Buck Converter , 2008, 2008 IEEE Region 10 and the Third international Conference on Industrial and Information Systems.

[5]  Kaiwei Yao,et al.  Tapped-inductor buck converter for high-step-down DC-DC conversion , 2005, IEEE Transactions on Power Electronics.

[6]  Duncan A Grant,et al.  Extending the tapped-inductor DC-to-DC converter family , 2001 .

[7]  K. Cheng,et al.  Bidirectional phase-shifted DC-DC converter , 1999 .

[8]  Joung-Hu Park,et al.  Nonisolation Soft-Switching Buck Converter With Tapped-Inductor for Wide-Input Extreme Step-Down Applications , 2007, IEEE Transactions on Circuits and Systems I: Regular Papers.

[9]  Y. Darroman,et al.  Synthesis of Tapped-Inductor Switched-Mode Converters , 2007, IEEE Transactions on Power Electronics.

[10]  B.H. Cho,et al.  Small-signal modeling of the tapped-inductor converter under variable frequency control , 2004, 2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551).

[11]  Jye-June Lee,et al.  A novel high step-up zero-current-switching tapped-inductor boost converter , 2011, 8th International Conference on Power Electronics - ECCE Asia.

[12]  K.W.E. Cheng,et al.  Tapped inductor for switched-mode power converters , 2006 .

[13]  B.H. Cho,et al.  PWM-switch Model of Tapped Inductor Converters under Hysteretic Current-mode Control , 2006, IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics.

[14]  J.P. Fohringer,et al.  Analysis of a boost converter with tapped inductor and reduced voltage stress across the buffer capacitor , 2006, 2006 IEEE International Conference on Industrial Technology.

[15]  Duncan A Grant,et al.  Watkins-Johnson converter completes tapped inductor converter matrix , 2003 .