Integration of Power Supply and Energy Storage on Micro Electrostatic Vibration Energy Harvester for Acceleration Measurement

Abstract

This study proposes a micro electrostatic energy harvesting system consists of electrostatic vibration energy harvester DC-DC buck converter energy storage element regulator and accelerometer applicable to wireless sensor network nodes The goal of this study is to combine vibration energy harvester with supercapacitor and charging circuitry where the former is as power supply and storage device for self-sustainable self-powered applications and the latter is for providing the desired voltage or current Simulations show that the electrostatic vibration energy harvester resonates at 105 Hz features a compact area of 9 mm2 generating 0 88 nJ per charge-constraint cycle and accordingly output power of 0 0924 μW Simulation of electrostatic energy harvesting system is performed with an input voltage of 6 6V resonant frequency 105 Hz and a variable capacitor of 19 pF using charge-constrained conversion The proposed electrostatic energy harvesting system of this study is able to apply to wireless sensor for residential and commercial buildings

Date of Award	2014 Jun 25
Original language	English
Supervisor	Shih-Ming Yang (Supervisor)