Power processing issues for micro-power electrostatic generators
File(s)
Published version
Author(s)
Type
Conference Paper
Abstract
For various monitoring and sensing applications it is desirable to power the electronics by scavenging energy from any locally available source. A prototype generator for low frequency (human body) motion has been developed using a micro-machined (MEMS) implementation of an inertial generator based on a moving-plate capacitor. The prototype generates pulses of 300 V on a 10 pF capacitor. This paper examines the design of a circuit and mosfet device to convert this energy to a low voltage. Because of the very small charge involved, the effect of leakage and parasitic stored charge are important. A silicon-on-insulator design is proposed and is examined through physics based finite-element simulation. The overall effectiveness of the generation process is shown to be composed of several terms which are functions of system parameters such as. generator flight time, device area and circuit inductance. It is shown that device area is a compromise between leakage current, charge storage and on-state voltage. It can, for a given generator and inductance, be optimised to provide the maximum energy yield.
Version
Published version
Date Issued
2004
Citation
2004, pp.4156-4162
ISBN
9780780383999
0-7803-8399-0
Publisher
IEEE
Source Title
35th Annual IEEE Power Electronics Specialists Conference (PESC 04)
Start Page
4156
End Page
4162
Copyright Statement
© 2004 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.
Source
35th annual IEEE power electronics specialists conference (PESC 04), Aachen, Germany, 20 - 25 June 2004
Source Place
Aachen, GERMANY
Place of Publication
New York
Start Date
2004-06-20
Finish Date
2004-06-25
Coverage Spatial
Aachen, Germany