Authors:
Rayudu Mannam,Srinivasa Rao Gorantla,Nagesh Vangala,DOI NO:
https://doi.org/10.26782/jmcms.2019.12.00057Keywords:
Soft Switching,Flyback Converters,DCM,Hard Switching,low power,DC-DC Converter,Abstract
AC- DC or DC-DC converters are today entirely dominated by switched-mode power converters, SMPCs. The industry today, in the race of meeting customers’ demands, is looking at packaging more and more power in lesser and lesser volumes. Hence the power supply designers are always engaged in devising new topologies and techniques to achieve power densities efficiently. Soft switching is one such technique which aids the designers in finding a solution to increase power densities by raising the switching frequency. The present paper proposes the least complicated soft-switching technique in low power flyback converters. Flyback converter in the power range of 150W is taken as a study piece, and soft switching is demonstrated without adding any extra hardware and control overhead. The obtained results are compared with a hard switched CCM flyback converter. Practical working models are built, tested, and evaluated to display the efficacy of the proposed scheme.Refference:
I. Christophe Basso. “The Dark Side of Flyback converters ON
semiconductors” APEC seminar, 2011.
II. Guichao Hua and Fred C. Lee. “Soft-Switching Techniques in PWM
Converters” IEEE Transactions on Industrial Electronics, Vol. 42, Issue 6,
pp. 595-603, December 1995.
III. KeithBillings, TaylorMorey. “Switching Power supply Design Handbook
Third edition ” Mc Graw Hill, 2009.
IV. Nagesh Vangala, Rayudu Mannam. “Transformer Design to Achieve Soft
Switching In Low Power Flyback Converters” IEEE 1st International
Conference on Power Electronics 2016, pp. 1-5, June 2016.
V. Ned Mohan, Tore M. Undeland and William P. Robbins. “Power Electronics
Converters, Applications, And Design THIRD EDITION” JOHN WILEY &
SONS, INC., 2003.
VI. SHAH, ASHISH P., et al. “INSILICO DRUG DESIGN AND
MOLECULAR DOCKING STUDIES OF SOME NATURAL PRODUCTS
AS TYROSINE KINASE INHIBITORS.” International Journal 5.1 (2017):
5.
VII. Shijie Chen et al. “A transformer assisted ZVS scheme for flyback
converter” Twentieth Annual IEEE Applied Power Electronics Conference
and Exposition APEC 2005 V2, pp. 678-682, March 2005.
VIII. Sung-Soo Hong, Sang-Keun Ji et al. “Analysis and design of a high voltage
flyback converter with resonant elements” Journal of Power Electronics,
Vol. 10, Issue 2, pp. 107-114, March 2010.
IX. T.W. Ching and K.U. Chan. “Review of Soft-Switching Techniques for
High- Frequency Switched-Mode Power Converters” IEEE Vehicle Power
and Propulsion Conference (VPPC), Harbin, China, pp. 1-6, September
2008.
X. Tesla N. “Electrical Igniter for Gas Engines” US Patent No: 609250, Aug
1898.
XI. West Coast Magnetics. “Switchmode Power Supply Transformer Design”
www.wcmagnetics.com Downloaded, April 2019.
XII. Xiaoyang Zhang. “Zero Voltage Switching in Flyback Converters with
Variable Input Voltages” US Patent No: 2013/0148385, June 2013.