Adaptive Electromagnetic Energy Harvesting Circuit for Wireless Sensor Application

This paper presents a microcontroller controlled electromagnetic energy harvesting system suitable for harvesting energy from a single HV transmission line with current between 65A and 130A. The system comprises of magnetic power generator standard voltage multiplier circuit, DC-DC boost converter and microcontrotler. An adaptive algorithm has been applied to the microcontroller to adjust the duty cycle of the converter to achieve maximum output power. This enables the harvesting system to convert and store low voltage sinusoidal power induce from magnetic power generator into the battery for energizing various low power applications. The implemented system is able to operate with minimum sinusoidal induced voltage as low as 1V and can generate 58mW at 65 mA line current. Furthermore, simulation and experimental result as well as mathematical analysis are also included in this paper.