Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Development of 2W-Level Wireless Powered Energy Harvesting Receiver using 60Hz power line in Electricity Cable Tunnel
Authors Gi-Chan Jang ; Bo-Hwan Choi ; Chun-Taek Rim
DOI 10.6113/TKPE/2016.21.4.296
Page pp.296-301
ISSN 1229-2214
Keywords WPT(Wireless Power Transfer); Rated power frequency; Energy harvesting; Electricity cable tunnel
Abstract Using high magnetic flux from a 60 Hz high-current cable, a 2 W wireless-powered energy harvesting receiver for sensor operation, internet of things (IoT) devices, and LED lights inside electrical cable tunnels is proposed. The proposed receiver comprises a copper coil with a high number of turns, a ring-shaped ferromagnetic core, a capacitor for compensating for the impedance of the coil in series, and a rectifier with various types of loads, such as sensors, IoT devices, and LEDs. To achieve safe and easy installation around the power cable, the proposed ring-shaped receiver is designed to easily open or close using a clothespin-shaped handle, which is made of highly-insulated plastic. Laminated silicon steel plates are assembled and used as the core because of their mechanical robustness and high saturation flux density characteristic, in which the thickness of each isolated plate is 0.3 mm. The series-connected resonant capacitor, which is appropriate for low-voltage applications, is used together with the proposed receiver coil. The concept of the figure of merit, which is the product weight and cost of both the silicon steel plate and the copper wire, is used for an optimized design; therefore, the weight of the fabricated receiver and the price of raw material is 750 gf and USD $2 each, respectively. The 2.2 W powering capability of the fabricated receiver was experimentally verified with a power cable current of 100Arms at 60Hz.