A Step-up DC-DC Converter With High Voltage Gain and Eliminated Right Half Plane Zero

Abstract

DC-DC converters play a basic role in the application of technologies. In the meantime, step-up converters with high voltage gain are one of the most widely used power converters in the world. The control-to-output transfer function of the several step-up converters with high voltage gain in the continuous conduction mode (CCM) area comprises minimum one right half plane (RHP) zero locating in the RHP. This issue leads to non-minimum phase (NMP) behavior in the step-up converters. The characteristic of the NMP in the converters causes the dynamic response to be slowed and stability margin to be limited. To tackle problems as mentioned earlier, a minimum-phase step-up DC-DC converter with high voltage gain is presented. The use of a four-winding coupled inductor causes in active switch time interval, the input energy directly transfers to the load and increases the voltage gain of the proposed converter. The operation principle in steady-state analysis of CCM and small signal analysis (SSA) is used to calculate voltage gain and to determine control-to-output transfer function, respectively. The simulation results are illustrated to verify the performance and validity of the theoretic lysis.