This paper presents a boost converter with flyback snubber which makes use of soft switching features, such as Zero Voltage Switching and Zero Current Switching. Initially, a conventional boost converter has been simulated and its output is compared with that of the proposed converter. It has been found that the switching loss of the boost converter with flyback snubber is much reduced in comparison to that of the conventional converter due to the implementation of soft switching features. Generally, closed loop control system is an important section in many process control stations. But the use of conventional converters gives poor performance in terms of peak overshoot, rise time and settling time. For a closed loop system having a PI controller and the proposed converter, the response obtained has less settling time and rise time but contains peak overshoot. So, to reduce the peak overshoot the gain values of the PI controller are first optimized using genetic algorithm.

1. Tsai-Fu Wu, Yong-Dong Chang, Chih-Hao Chang, and Jeng-Gung Yang, 2012 "Soft-Switching Boost Converter With a Flyback Snubber for High Power Application", IEEE Transactions On Power Electronics, VOL. 27, NO. 3.
2. Li, R. T. H. , Chung, H. S. H. , 2010, "A passive lossless snubber cell with minimum stress and wide soft-switching range," IEEE Trans. Power Electron. , 25, No. 7, pp. 1725–1738
3. Aksoy, I. , Bodur, H. , Bakan, A. F. 2010, "A new ZVT-ZCT-PWM DC-DC converter", IEEE Trans. Power Electron. , 25, No. 8, pp. 2093–2105.
4. Oliveira Stein, C. M. , Hey, H. L. , 2000, "A true ZCZVT commutation cell for PWM converters," IEEE Trans. Power Electron. , 15, No. 1, pp. 185–193.
5. Das, P. , Moschopoulos, G. , 2007, "A comparative study of zero-current transition PWM converters," IEEE Trans. Ind. Electron. , 54, No. 3, pp. 1319–1328.
6. Oliveira Stein, C. M. , Grundling, H. A. , Pinheiro, H. , Pinheiro, J. R. ,. Hey, H. L. , 2004, "Zero Current and Zero-Voltage soft-transition commutation cell for PWM inverters," IEEE Trans. Power Electron. , 19, No. 2, pp. 396–403.
7. Wu, T. F. , Chen, Y. C. , Yang, J. G. , Kuo, C. L. , 2010, "Isolated bidirectional full-bridge DC–DC converter with a flyback snubber," IEEE Trans. Power Electron. , 25, No. 7, pp. 1915–1922
8. Davis L. , Handbook of Genetic Algorithms, VNR Comp. Library, 1990
9. Tulafeh R. J. , 2010 "Genetic Algorithms based optimization design of tuning a PID controller" Al-Qadisiya Journal For Engineering Sciences,Vol. 3 No. 3

Flyback Snubber Zero Voltage Switching Zero Current Switching Pi Controller Genetic Algorithm