Design and Implementation of a Modified Dual Bridge LLC Series Parallel Resonant DC-DC Converter with Dual Tank

A New dual bridge series parallel resonant converter can widen the soft switching range and improve the circuit performance by means of voltage gain with dual tank and centre tapped transformer. Sometimes the voltage drop occurs by increasing the load. So closed loop PI controller vary the duty cycle of the MOSFET Switches below the frequency of 0.5 and act as a boost converter to maintain the constant dc output voltage. The LLC resonant converter provides high efficiency with high power density which leads to their applications in most advance technology. The main aim of this project was to boost up the output voltage, current stabilization and soft switching by using LLC converter and closed loop PI Controller. The common closed loop PI controller is used on both the side of the LLC resonant tank which eliminates the steady-state error and decrease the start-up time of the output voltage. The simulation can be obtained by using MATLAB software.