Design of Magnetic Energy Harvesters Equipped With Series AC‐Side Capacitor for Attaining Maximum Power

ABSTRACT The letter concerns a clamped‐type magnetic energy harvester (MEH) equipped with an AC‐side series‐connected capacitor, powering a constant‐voltage‐type load (CVL) via a diode rectifier. It was recently shown that introducing a series‐connected capacitor to a passive MEH enlarges harvested power due to the possibility of increasing the load voltage without aggregating the amount of volt‐seconds applied to the core. Yet, the capacitance value needs to be primary current dependent. This brief provides analytical guidelines for designing an AC‐side capacitor‐equipped MEH for driving a given CVL with maximum attainable power. Experimental results of a MEH capable of harvesting 310 W from a conductor carrying 350 A RMS , 50 Hz current while driving a 70 V CVL are given to validate the proposed design process. Trial Registration: Irrelevant