Prototype of magnetic energy harvesting device as a 3.3 V battery

The purpose of this study is to obtain power for driving sensors using the magnetic energy harvesting. The magnetic energy harvesting device is constituted with a coil, a full-wave rectifier circuit and a DC-DC step-down converter. In this paper, this device was evaluated to obtain a DC output voltage of 3.3 V. Additionary, a target power for driving sensors was set to 90 mW. As an evaluated result, an output voltage of 3.3 V could be obtained. Especially, a output power of 104 mW harvested at connected a load resistance of 100 Ω.