Interface circuit using SMFE technique for an inductive kinetic generator operating as a frequency-up converter

13th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Sanchez, D.^1 ; Jodka, E.^1 ; Hoffmann, D.^2 ; Manoli, Y.^1,2

Fritz Huettinger Department of Microelectronics, Department of Microsystems Engineering-IMTEK, University of Freiburg, Germany^1

HSG-IMIT-Institute of Micromachining and Information Technology, Villingen-Schwenningen, Germany^2

关键词: Complete system;    Discrete components;    Energy Harvester;    Interface circuits;    Output voltages;    Standard interface;    Voltage doubler;    Voltage doubler rectifier;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/476/1/012051/pdf
DOI  :  10.1088/1742-6596/476/1/012051

来源: IOP

【 摘 要 】

This paper presents a novel interface circuit for an inductive kinetic energy harvester, which is designed based on the SMFE (Synchronized Magnetic Flux Extraction) technique. The generator is designed to fit into a shoe sole to power a telemetric device. It operates as a frequency-up converter and possesses a small output series resistance, allowing the SMFE scheme to be applied as an energy harvesting enhancement technique. A prototype has been implemented and simulated using discrete components in order to demonstrate the SMFE concept and compare it with typical standard interfaces used (Full Bridge and Voltage doubler rectifiers). Compared to the standard schemes, the SMFE method is able to extract a considerably higher amount of energy for a wide range of output voltages. Assuming one walking step per second, the complete system could provide 18.8 mW output power using the SMFE interface, compared to 8 mW with the full bridge and 12.3 mW using the voltage doubler.