A high step‐up DC/DC converter with capacitor‐clamped double‐switch structure for proton exchange membrane fuel cell application

Summary Due to the low output voltage and soft output characteristics of proton exchange membrane fuel cell (PEMFC), DC/DC converter with high voltage gain has become a key part for safe and stable operation. In this paper, a novel high step‐up DC/DC converter with switched‐inductor (SI), switched‐capacitor (SC), and a capacitor‐clamped double‐switch structure is proposed, which can obtain high voltage gain with lower duty cycle and low voltage stress on switches and diodes. Switches run in an interleaving mode to reduce the inductor current ripple. The detailed analysis of the converter, device parameter design, comparation with other converters, and double closed‐loop controller design are presented, respectively. Finally, a 100‐W, 15‐V/100‐V experimental prototype is built to demonstrate the effectiveness of the proposed converter and controller. In this paper, a novel high step‐up DC/DC converter with switched‐inductor (SI), switched‐capacitor (SC), and a capacitor‐clamped double‐switch structure is proposed, which can obtain high voltage gain with lower duty cycle, low inductor ripple, and low voltage stress on switches and diodes. The linear and nonlinear control strategy and stability of the proposed converter are evaluated.