Rotational Electromagnetic Energy Harvesting System

Abstract

This paper presents development of the rotational electromagnetic energy harvesting transducer. The transducer is driven mechanically by pushing a button; therefore, the mechanical energy will be converted into electrical energy. The energy harvesting (EH) transducer consists of multilayer planar coils embedded in a PCB, multipolar NdFeB hard magnets, and a mechanical system for movement conversion. The EH transducer generate an energy of about 4mJ at a load of 10Ω. The maximum open circuit output voltage is as high as 2V and the maximum short circuit output current is 800mA.