Abstract—LLC series resonant converter is the most suitable converter for medium power applications due to its high efficiency and wide input range. This paper presents the closed loop controlled LLC half bridge series-resonant converter with isolated load. LLC resonant converters display many advantages over the conventional LC series resonant converter, such as narrow frequency variation over wide range of load, input variation and zero voltage switching even under no load conditions. High switching frequency operation reduces switching losses. Resonant transition converters are characterized by low switching losses and low conduction losses. Power factor improvement and high efficiency is achieved with a constant output voltage and is regulated by using closed loop control and the simulation results for the converter is presented.
Index Terms—DC-DC High frequency Converter; zero voltage soft-switching converter (ZVS); LLC resonant tankcircuit.
Sivachidambaranathan V. is with Sathyabama University, Chennai, India (e-mail: sivachidambaram_eee@ya;hoo).
S. S. Dash is with EEE Department, SRM University, Chennai, India.
Cite: Sivachidambaranathan V. and S. S. Dash, "Closed Loop Controlled LLC Half Bridge Isolated Series Resonant Converter," International Journal of Information and Electronics Engineering vol. 1, no. 3, pp. 265-270, 2011.