Finite element analyses of a flat spring for use in an electromagnetic microgenerator

Awaja, N, Sood, D and Vinay, T 2009, 'Finite element analyses of a flat spring for use in an electromagnetic microgenerator', Sensors & Transducers Journal, vol. 107, no. 8, pp. 119-132.


Document type: Journal Article
Collection: Journal Articles

Title Finite element analyses of a flat spring for use in an electromagnetic microgenerator
Author(s) Awaja, N
Sood, D
Vinay, T
Year 2009
Journal name Sensors & Transducers Journal
Volume number 107
Issue number 8
Start page 119
End page 132
Total pages 14
Publisher International Frequency Sensor Association (IFSA)
Abstract This paper represents a study on design aspects of flat spring, which is the active component of electromagnetic microgenerator, through comprehensive finite element analyses. The electromagnetic microgenerator performs as a transducer that converts ambient vibrational energy to electrical power. A Model of flat spring is developed and used in the finite element analyses study utilizing ANSYS software. The structural analysis has been carried out to analyze different flat spring designs and evaluate the flat spring characteristics to provide an optimum spring model. Maximum static deflection was found to be 13.43 ?m is under the gravitational force. Furthermore, free vibration characteristics of the selected spring are presented to determine the resonance frequency. Natural frequency of 18.56 Hz was obtained. The simulation results show that the electromagnetic microgenerator can generate 14.5 nW at an input frequency of 3 kHz.
Keyword(s) Micro power generator
Micro spring design
and Mechanical vibration
ISSN 1726-5479
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