A MEMS Magnetic-Based Vibration Energy Harvester

A MEMS Magnetic-Based Vibration Energy Harvester

This paper presents the design, analysis and integrated fabrication of a MEMS magnetic-based vibration energy harvester targeted for machine health monitoring. The design consists of Si-springs, permanent magnets as mass, and coils wound on the top and bottom side of the harvester package for mechan...

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Bibliographic Details
Main Authors: Shin, Abraham, Radhakrishna, Ujwal, Yang, Yuechen, Zhang, Q., Gu, L., Riehl, P., Chandrakasan, Anantha P, Lang, Jeffrey H
Other Authors: Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Format: Article
Language:English
Published: IOP Publishing 2021
Online Access:https://hdl.handle.net/1721.1/129412
Description
Summary:This paper presents the design, analysis and integrated fabrication of a MEMS magnetic-based vibration energy harvester targeted for machine health monitoring. The design consists of Si-springs, permanent magnets as mass, and coils wound on the top and bottom side of the harvester package for mechanical-to-electrical energy conversion based on the Lorentz-force principle. The harvester is optimized to have its translational resonant-mode match external vibrations while separating higher-order modes. Mechanical and magnetic optimization of the harvester is carried out together with optimization of its power and control electronics in order to provide maximum output power from a vibration input that can vary its frequency by ±5%. The harvester achieves an open-circuit voltage amplitude of 145 mV and delivers 165 μW to a matched load at the resonance frequency of 45.7 Hz.

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