Two‐Phase Interleaved Tri‐State Coupled Inductor‐Based High Step‐Up Gain Converter With Improved Dynamic Response and Reduce Ripple

ABSTRACT The use of coupled inductor (CI)‐based high step‐up gain topologies is increasing to handle a vast range load/input voltage disturbance. In CCM operation, the presence of right half plane (RHP) zero in control‐to‐output voltage transfer function is a major issue. This paper introduces a new two‐phase interleaved tri‐state CI‐based high step‐up gain converter that eliminates RHP zero. To achieve this, tri‐state configuration in the proposed topology is implemented, enabling wide bandwidth and stable operation. The interleaved structure on input side reduces input current ripple and increases bandwidth. This helps to increase power density and improves the dynamic response of converter. The interleaved operation also reduces current stress on devices, minimizes core size and reduces losses, and improves efficiency. The claim of RHP zero free operation of the proposed converter is verified by deriving the small signal model. Simulation and experimental studies are presented to validate the theoretical findings. Experimental verification is conducted using a 200‐W laboratory prototype of the converter, designed to boost a 24‐V input to a 100‐V output.