Closed Loop Controlled Half Bridge Series Resonant PFC DC to DC Converter

This paper presents the modeling and simulation of closed loop controlled Half Bridge Series Resonant Power Factor Correction (PFC) DC – DC converter with high frequency transformer isolation using Matlab Simulink. Half bridge converters are well suitable for low input voltage and high current applications. High power density and high efficiency are the major driving force for this application. The operation at higher frequencies considerably reduces the size of passive components, such as transformers and filters, however switching losses have been an obstacle for high frequency operation. To reduce switching losses and allow high frequency operation, resonant techniques have been developed. This technique reduces distortion and results in almost sinusoidal output. The switching processes are softly commutated. Therefore the switching losses and noises are reduced. The open loop and closed loop models for DC – DC Half Bridge Series Resonant PFC converter have been developed and the MATLAB simulation results are presented.