Single switch quadratic boost converter with continuous input current for high voltage applications

Summary In this paper, a novel non‐isolated very high step‐up DC‐DC converter is presented. The introduced converter benefits from various advantages, namely, very high voltage gain, low voltage stress on the active switch, and continuous input current with low ripple. Therefore, the presented converter is suitable for renewable energy applications. In addition, the energy of the leakage inductance of the coupled inductor is successfully recovered, and the voltage spike of the active switch is clamped during the turn‐off process. Hence, a switch with low Rds−on can be used, which decreases the conduction losses as well as cost of the converter. Furthermore, the voltage stress of the output diode is decreased, which reduces the reverse recovery problem. The steady‐state analysis and design considerations of the proposed converter are discussed. Finally, the theoretical analysis is validated with the experimental results at an output power of 150 W. In this paper, a novel non‐isolated very high step‐up DC‐DC converter is presented. The introduced converter benefits from various advantages, namely very high voltage gain, low voltage stress on the active switch, and continuous input current with low ripple. Therefore, it is suitable for renewable energy applications.