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High switching frequency operation, with converter loss kept at minimum, is possible through the use of Zero-Voltage Switching (ZVS) technique. High power factor operation can be achieved in Pulse Width Modulation (PWM) technique, since the input current is inherently close to sinusoidal due to the current injection PWM technique. High frequency operation is necessary to reduce the size of reactive components. Further, for MOSFET-based converters, ZVS is required for efficient operation to reduce or eliminate heat sink requirements. Resonant converters were well documented to meet both of these requirements. The aim of this work was to develop simulink models for Power Factor Correction (PFC) converter and closed loop DC to DC converter. In the present work, high frequency full bridge series resonant PFC converter with improved efficiency is designed and the simulation results are presented. [ABSTRACT FROM AUTHOR]

Resonant power converters have many advantages over Pulse Width Modulation (PWM) power converters, such as lower switching losses at higher switching frequencies, easier EMI filtering, reduced component stress and higher efficiency. High switching loss considerably reduces the converter efficiency. The use of soft-switching techniques, alleviate switching loss problems and allow a significant increase in the converter switching frequency. At increased frequency the converter can employ smaller sized magnetic elements and filter components. Resonant converters eliminate most of the switching losses. The advantages of Parallel Resonant Converter (PRC) are that the output dc filter capacitor does not carry high ripple current and also it exhibits good voltage regulation. In the present work Parallel Resonant Converter (PRC) with Zero Voltage Switching (ZVS) for the 12 V DC output is designed with High Frequency (HF) and the simulation results are presented. [ABSTRACT FROM AUTHOR]