Journal
JOURNAL OF MICROELECTROMECHANICAL SYSTEMS
Volume 24, Issue 3, Pages 516-518Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JMEMS.2015.2413811
Keywords
Electrostatic; energy harvesting; ferrofluid; liquid dielectric
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Funding
- LG Electronics Advanced Research Institute, Seoul, Korea
- National Research Foundation of Korea [22A20130012145] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We propose a fully liquid-based energy harvester that uses ferrofluid droplets as a movable dielectric material. The proposed device consists of top and bottom plates with conducting electrodes coated with a thin solid dielectric layer, a conducting liquid, and oil-based ferrofluid droplets as movable dielectric layers. The rotational motion of the ferrofluid droplets is actuated by a magnetic field that causes a capacitance variation that is used to generate electric power. An average output power of 19.3 mu W is generated when eight ferrofluid droplets are used at a rotational speed of 180 r/min.
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