Wireless Power Enabled Ultra-Energy Efficient Bi-Stable Actuator for Microfluidics

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dc.contributor.advisor Hu, AP en
dc.contributor.advisor Salcic, Z en
dc.contributor.author Kularatna, Dulsha en
dc.date.accessioned 2018-07-11T21:15:29Z en
dc.date.issued 2018 en
dc.identifier.uri http://hdl.handle.net/2292/37436 en
dc.description.abstract In the past few decades microfluidic systems have gained significant interest both in academia and industry. They are used for chemical analysis where small quantities of fluids are treated using special components such as microvalves, micropumps and micromixers. The automated biochemical laboratory is a microfluidic platform that studies the toxic effects of chemicals on Zebra fish embryos. This platform operates several solenoid microvalves for very long hours leading to a large power consumption. To improve the portability of the system the power consumption needs to minimised to reduce the required battery capacity. This thesis aims to develop a new energy efficient microactuator to reduce the power consumption of these solenoid microvalves. The thesis proposes a novel microfluidic actuator for microvalves, with bi-stable actuation, wireless power and wireless actuation control, which is significantly more efficient than state of the art microvalves reported in literature. An ultra-energy efficient bi-stable actuation mechanism, primary and secondary wireless power supply circuits and wireless actuation control has been designed and implemented. The actuation mechanism, magnetic and electrical circuits of the actuator and power supply have been theoretically modelled and analysed. Here the actuator is driven by electropermanent magnets, together with an inductively coupled wireless power transfer system and supercapacitor based energy buffering. Energy gradually extracted through the wireless power transfer system, accumulated on the supercapacitor buffer, provides momentary peak power for actuation only. The microactuator also features a unique communication mechanism to deliver the valve control signal to the microactuator. It has been shown experimentally that the new microactuator reduces the energy consumption of the automated biochemical laboratory by an order of two. This microactuator also features ultra-fast, bi-stable actuation, significant deflection and force capabilities. This novel microactuator provides wireless power and control, ultra-energy efficient actuation, high deflection and force capability, making them a unique class of microfluidic actuators. en
dc.publisher ResearchSpace@Auckland en
dc.relation.ispartof PhD Thesis - University of Auckland en
dc.relation.isreferencedby UoA99265081412302091 en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.rights.uri http://creativecommons.org/licenses/by-nc-sa/3.0/nz/ en
dc.title Wireless Power Enabled Ultra-Energy Efficient Bi-Stable Actuator for Microfluidics en
dc.type Thesis en
thesis.degree.discipline Electrical and Electronic Engineering en
thesis.degree.grantor The University of Auckland en
thesis.degree.level Doctoral en
thesis.degree.name PhD en
dc.rights.holder Copyright: The author en
dc.rights.accessrights http://purl.org/eprint/accessRights/OpenAccess en
pubs.elements-id 747656 en
pubs.record-created-at-source-date 2018-07-12 en


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http://creativecommons.org/licenses/by-nc-sa/3.0/nz/ Except where otherwise noted, this item's license is described as http://creativecommons.org/licenses/by-nc-sa/3.0/nz/

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