Effect of core and magnetoplated wire on energy harvesting using leakage flux recovery coil

Abstract

Magnetic flux in the environment can be converted to electric power using a coil. However, to date, the power recovered has been miniscule because of increases in the AC resistance of the coil. This paper reports an investigation of the role of the core in the impedance of the coil, and the output power of the energy harvesting circuit of the leakage magnetic flux recovery coil. The use of a magnetoplated wire with a ferrite core in an energy harvesting circuit resulted in an increase in power of 29.3% to give 6.53 mW at 150 kHz in a uniform magnetic flux density of 27 mT.