An active clamp coupled inductor‐based soft‐switched quadratic boost converter

Abstract

This paper proposes a novel active clamp-based quadratic boost converter to achieve a high gain output voltage. The converter combines a quadratic boost converter with a voltage doubler circuit using a coupled inductor. An active clamp circuit with an auxiliary switch is used to utilize the usually wasted energy of leakage inductance and clamp the voltage to a certain limit. The combination of leakage inductance and parasitic capacitance of the main switch provides the benefit of zero voltage switching (ZVS) in both MOSFETs. Similarly, output diodes operating under zero current switching (ZCS) improve the overall efficiency of the converter. Voltage doubler and active clamp circuitry reduce the voltage stress on solid-state devices; hence, a low R ds,on device is selected. The converter model is simulated using PSIM software and calculated maximum efficiency of $95% for 200 W and measured maximum efficiency of $93% for 190 W power level including various parasitic elements.

A new soft‐switching high step‐up DC–DC converter with low voltage stress

“…There are various types of high-gain converters with some control techniques designed for different applications. [2][3][4][5][6][7][8] A high-gain converter plays a significant role in fuel cell application. The output voltages of the majority of distributed energy sources, such as photovoltaic and fuel cells, are often very low, forcing the use of a high step-up converter.…”

“…As a result, the importance of the market for boost converters is still growing. There are various types of high‐gain converters with some control techniques designed for different applications 2‐8 . A high‐gain converter plays a significant role in fuel cell application.…”