Stability Prediction of Soft Switched Isolated DC-DC Converter
A.Gnana Saravanan1, R.Arul Jose2, P.Ebby Darney3, S.Siva Samuthira Pandian4, K.Mariappan5

1Dr.A.Gnana Saravanan, Professor, EEE, Francis Xavier Engineering College, Tirunelveli, India.
2Dr.R.Arul Jose, Assistant Professor, EEE, SCAD College of Engg. & Technology, Cheranmahadevi, India.
3Dr.P.Ebby Darney, Professor, EEE, SCAD College of Engg. & Technology, Cheranmahadevi, India.
4S.Siva Samuthira Pandian, Assistant Professor, EEE, Francis Xavier Engineering College Tirunelveli, India.
5K.Mariappan, Assistant Professor, EEE, Einstein College of Engineering, Tirunelveli, India. 

Manuscript received on November 16, 2019. | Revised Manuscript received on 27 November, 2019. | Manuscript published on December 10, 2019. | PP: 953-957 | Volume-9 Issue-2, December 2019. | Retrieval Number: J94930881019/2019©BEIESP | DOI: 10.35940/ijitee.J9493.129219
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Abstract: Mathematical analysis and stability prediction of soft switched isolated dc-dc converter is presented in this paper. Half bridge dc-dc converter is an attractive topology for low voltage applications due to its simplicity, lower cost, improved reliability and enhanced dynamic performance. Both power semiconductor switches of the proposed isolated converter operate asymmetrically under Zero Voltage Switching (ZVS) to achieve high efficiency and low voltage stress. Furthermore, the ringing resulted from the oscillation between the transformer leakage inductance and the junction capacitance of two switches is eliminated. Conversion efficiency is also improved by providing synchronous rectifier with very small output filter. The operating principle, state space analysis and control strategy of proposed converter is explained with small signal model. Experimental results are presented to explain the zero voltage switching capability and stability features of proposed converter. 
Keywords: Half Bridge Converter, State Space Modelling, Pulse Width Modulation (PWM), Small Signal Model, Zero Voltage Switching (ZVS).
Scope of the Article: Signal Control System & Processing