Tunable capacitoe based on polymer-dispersed liquid crystal for optimum micro-power harvesting
Resource
TRANSDUCERS 2007. International Solid-State Sensors, Actuators and Microsystems Conference, 137-140
Journal
4th International Conference on Solid-State Sensors, Actuators and Microsystems
Pages
137-140
Date Issued
2007
Author(s)
Abstract
This paper presents a tunable power harvesting device and explains how a tunable capacitor based on polymer-dispersed liquid crystal (PDLC) can be used to optimize the power harvesting efficiency. For improving the power harvesting efficiency, we have developed a PDLC tunable capacitor to adjust the resonance frequency of the piezoelectric micro-cantilever beam to match the frequency of environmental random vibration in real time. Fabrication process and measurement results of the PDLC tunable capacitor are detailed. Large tuning ratio up to 117.5% of the PDLC tunable capacitor is measured at 75 kHz signal frequency. At 12 V driving voltage, tuning ratio as 55% can be achieved.
SDGs
Type
conference paper
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