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01-05-2010 | Technical Paper | Issue 5/2010

Microsystem Technologies 5/2010

Power sensitivity of vibration energy harvester

Journal:
Microsystem Technologies > Issue 5/2010
Authors:
Zdenek Hadas, Cestmir Ondrusek, Vladislav Singule
Important notes
SPIE Europe microtechnologies for the new millennium 2009, Dresden, Germany.

Abstract

This paper deals with a power sensitivity improvement of an electromagnetic vibration energy harvester which generates electrical energy from ambient vibrations. The harvester provides an autonomous source of energy for wireless applications, with an expected power consumption of several mW, placed in environment excited by ambient mechanical vibrations. An appropriately tuned up design of the harvester with adequate sensitivity provides sufficient generating of electrical energy for some wireless applications and maximal harvested power depends on a harvester mass, frequency and level of the vibration and sensitivity of the energy harvester. The design of our harvester is based on electromagnetic converter and it contains a unique spring-less resonance mechanism where stiffness is provided by repelled magnetic forces. The greater sensitivity of the harvester provides more generated power or decrease of the harvester size and weight.

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