Wideband vibration energy harvesting using electromagnetic transduction for powering internet of things

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dc.contributor.advisor Roy, Saibal en
dc.contributor.author Mallick, Dhiman
dc.date.accessioned 2017-06-13T10:24:43Z
dc.date.available 2017-06-13T10:24:43Z
dc.date.issued 2017
dc.date.submitted 2016
dc.identifier.citation Mallick, D. 2017. Wideband vibration energy harvesting using electromagnetic transduction for powering internet of things. PhD Thesis, University College Cork. en
dc.identifier.endpage 285 en
dc.identifier.uri http://hdl.handle.net/10468/4072
dc.description.abstract The ‘Internet of Things-(IoT)’ envisions a world scattered with physical sensors that collect and transmit data about almost anything and thereby enabling intelligent decision-making for a smart environment. While technological advancements have reduced the power consumption of such devices significantly, the problem of perpetual energy supply beyond the limited capability of batteries is a bottleneck to this vision which is yet to be resolved. This issue has surged the research to investigate the prospect of harvesting the energy out of ambient mechanical vibrations. However, limited applications of conventional resonant devices under most practical environments involving frequency varying inputs, has gushed the research on wideband transducers recently. To facilitate multi-frequency operation at low-frequency regime, design innovations of the Silicon-onInsulator based MEMS suspension systems are performed through multi-modal activation. For continuous bandwidth widening, the benefits of using nonlinear stiffness in the system dynamics are investigated. By topologically varying the spring architectures, dramatically improved operational bandwidth with large power-density is obtained, which is benchmarked using a novel figure-of-merit. However, the fundamental phenomenon of multi-stability limits many nonlinear oscillator based applications including energy harvesting. To address this, an electrical control mechanism is introduced which dramatically improves the energy conversion efficiency over a wide bandwidth in a frequencyamplitude varying environment using only a small energy budget. The underlying effects are independent of the device-scale and the transduction methods, and are explained using a modified Duffing oscillator model. One of the key requirements for fully integrated electromagnetic transducers is the CMOS compatible batch-fabrication of permanent magnets with large energy-product. In the final module of the works, nano-structured CoPtP hard-magnetic material with large coercivity is developed at room-temperature using a current modulated electro-deposition technique. The demagnetization fields of the magnetic structures are minimized through optimized micro-patterns which enable the full integration of high performance electromagnetic energy harvesters. en
dc.description.sponsorship Science Foundation Ireland (SFI PI Grant - 11/PI/1201); University College Cork (Strategic Research Fund) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher University College Cork en
dc.rights © 2017, Dhiman Mallick. en
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/ en
dc.subject MEMS en
dc.subject Electromagnetic en
dc.subject Vibration en
dc.subject Nonlinear en
dc.subject Energy harvesting en
dc.subject Internet of things en
dc.title Wideband vibration energy harvesting using electromagnetic transduction for powering internet of things en
dc.type Doctoral thesis en
dc.type.qualificationlevel Doctoral en
dc.type.qualificationname PHD (Engineering) en
dc.internal.availability Full text available en
dc.check.info No embargo required en
dc.description.version Accepted Version
dc.contributor.funder Science Foundation Ireland en
dc.contributor.funder University College Cork en
dc.description.status Not peer reviewed en
dc.internal.school Tyndall National Institute en
dc.check.type No Embargo Required
dc.check.reason No embargo required en
dc.check.opt-out Not applicable en
dc.thesis.opt-out false
dc.check.embargoformat Not applicable en
ucc.workflow.supervisor saibal.roy@tyndall.ie
dc.internal.conferring Summer 2017 en

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