A Miniature Energy Harvesting Device for Wireless Sensors in Electric Power System
A novel energy harvesting device called the energy coupler is proposed which can provide power to small wireless sensors in A power system. The energy coupler when coupled electromagnetically to A nearby current carrying conductor scavenges Ac power from the conductor. The proposed energy coupler converts the harvested Ac power into dc using A passive voltage multiplier circuit. The design of the energy coupler is such that the dc power obtained is Adequate to charge A miniature 1.2-V rechargeable battery. It is demonstrated that the energy coupler is capable of delivering 10 mW of dc power to A 50-Omega load. An Analytical model is Also presented which Agrees well with measurement results within A margin of error of 10%.