Bidirectional Converter‐Based Power Conditioning Unit for Self‐Sustained Wireless Sensor Networks

The growing use of Wireless Sensor Networks (WSNs) in remote and energy‐limited areas calls for compact and efficient power converters. This paper proposes a bidirectional step‐up/down DC–DC converter with a Modified Active Switched Inductor (MASL) cell, designed for energy harvesting powered WSNs. By integrating a switched capacitor network and an auxiliary control switch, the converter improves voltage gain, reduces ripple, and lowers voltage stress. It enables efficient energy transfer between renewable sources and storage elements like batteries or supercapacitors. Controlled synchronous rectification enhances efficiency, reaching a peak of 93.5%. MATLAB/Simulink simulations and a 200 W hardware prototype confirm its suitability for reliable, self‐powered WSN applications.