High Gain DC-DC Dual Converter integrating with Coupled Inductor and Diode Capacitor Switches

Many researchers have made great efforts to develop DC converter designs, to study how to increase voltage gain with low voltage stress and low ripple current. This paper proposed a DC-DC converter with a high conversion ratio, low voltage stress, and low ripple current based on the combination of two parallel boost converters. Using the interleaving approach, two converters, an inductor-coupled converter, and a conventional converter are connected on both sides of the input source to reduce the ripple of the source current, and the load is shared between them. Voltage gain and voltage stresses across power semiconductors were determined using steady-state analysis. In addition, Input current and output voltage ripple were analyzed. The inductors of this converter operate in continuous conduction mode (CCM). Higher voltage gain does not entail maximum duty cycle levels, which eliminates issues such as diode reverse recovery. The use of a passive clamp circuit reduces the voltage stress of the switch. This allows the use of low-voltage rated switches with low "on-case" impedance, which increases overall system efficiency. Theoretical analysis and mathematical relationships were performed. Finally, to validate the theoretical calculations, this converter was simulated in MATLAB / SIMULINK program. The results were good and largely identical to the theoretical calculations.