Modelling and verification of nonlinear electromechanical coupling in micro-scale kinetic electromagnetic energy harvesters
Loading...
Files
Accepted version
Date
2019-09-13
Authors
Sokolov, Andrii
Mallick, Dhiman
Roy, Saibal
Kennedy, Michael P.
Blokhina, Elena
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Published Version
Abstract
Electromechanical coupling in kinetic energy harvesters is the key aspect of these devices that ensures an effective energy conversion process. When modelling and designing such devices, it is necessary to incorporate electromechanical coupling correctly since it will determine the amount of energy that will be converted during its operation. As the engineering community prefers compact (lumped) models of such devices, the conventional choice of the lumped model for the electromagnetic type of electromechanical coupling is linear damping, proportional to the velocity of the mechanical resonator in a harvester, leading to the idea of maximizing the velocity in order to improve the energy conversion process. In this paper, we show that electromechanical coupling in electromagnetic kinetic energy harvesters is inherently nonlinear and requires a number of aspects to be taken into account if one wants to optimize a device. We show that the proposed model, which is based on first principles of electromagnetics, can be reduced to a nonlinear lumped model that is particularly convenient for analysis and design. The modelling approach and the resulting lumped model are verified using two MEMS electromagnetic harvesters operating over a range of frequencies from 300 to 500 Hz (Harvester A) and from 50 to 70 Hz (Harvester B) generating from mV (Harvester A) to few volts (Harvester B) of RMS voltage, respectively. The proposed modelling approach is not limited to energy harvesters but can also be applied to magnetic sensors or other MEMS devices that utilise electromagnetic transduction.
Description
Keywords
Computer aided design , Electromagnetic transduction , Lumped modelling , MEMS interface , MEMS kinetic energy harvesting , Mixed-domain modelling , Modelling and simulations , Numerical methods
Citation
Sokolov, A., Mallick, D., Roy, S., Kennedy, M. P. and Blokhina, E. (2020) 'Modelling and verification of nonlinear electromechanical coupling in micro-scale kinetic electromagnetic energy harvesters'. IEEE Transactions On Circuits and Systems I-Regular Papers, 67 (2), pp. 565-577. doi: 10.1109/TCSI.2019.2938421
Copyright
© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.