ارائه ساختار و طراحي بهينه برداشتگرهاي انرزي باد پيزوالكتريكي باند وسيع شامل مدارهاي واسط مجتمع

چكيده انگليسي :

1 Topology Implementation and Design Optimization of WidebandPiezoelectric Wind Energy Harvesters including Integrated Interface Circuits Nasrin Rezaei n rezaei@ec iut ac ir February 15 2016 Doctor of Philosophy Thesis Department of Electrical and Computer EngineeringIsfahan University of Technology Isfahan 84156 83111 IranSupervisor Dr Rasoul Dehghani dehghani@cc iut ac irAdvisor Dr Ahmadreza Tabesh a tabesh@cc iut ac irDepartment Graduate Program Coordinator Dr Mohammadreza Taban Isfahan University of Technology Isfahan 84156 83111 IranAbstractThis thesis presents a topology for the wideband piezoelectric energy harvester from low speed wind ow andintegrated power processing circuits including converters and controllers for maximum power point tracking MPPT The proposed wind energy harvester is useful for powering of wireless sensor nodes in smart monitoringand internet of things IoT applications The suggested topology uses a single piezoelectric beam and achievesthe wideband feature via the design of exerted force on the beam An optimization method is also proposed todesign the harvester with respect to the wind speed distribution model for capturing maximum available windenergy In power processing circuit a control method based on the voltage feedback is proposed to reduce thepower losses of the circuit for maximum power point tracking The suggested control method can be used fordifferent interface circuits including full bridge FB voltage doubler VD and synchronized switch harvestingon inductor SSHI and its tracking performance is independent of piezoelectric beam parameters as well as thefrequency and amplitude of the vibrating piezoelectric beam The thesis also presents a technique to implementa high voltage integrated interface in CMOS technology with lower nominal voltage which eliminates the needfor high voltage integrated process in developing the energy harvester interfaces Key Words Windband piezoelectric wind energy harvester Integrated power processing circuit Low windspeed Maximum power transfer Self power wireless nodes Internet of Things IoT IntroductionEnergy harvesting is a promising solution to develop self powered wireless sensor nodes andIoT devices In addition to environmental concerns with batteries replacing the batteries inwireless devices may not be feasible in remote and inaccessible situations such as structuralhealth monitoring and distributed smart monitoring devices in IoT applications Energyharvesting based power supplies have two parts energy harvesting devices to capture theambient energy and convert it to electrical energy and power management integrated circuits PMICs that process the captured power and provide an operating condition to extract themaximum available power in the energy harvesting devices Among various ambient sources that can be harvested wind energy harvesting is a promis ing solution to develop self powered wireless sensor nodes WSNs that is mainly suitablefor outdoor smart monitoring applications Capturing the wind energy in micro power scalefor powering sensor nodes faces the following challenges 1 The intermittence nature of thewind necessitates to use a wideband energy harvesting topology and consider wind speeddistribution models in the design procedure of the energy harvester 2 Wind energy harvestersoften need to operate at small startup cut in wind speeds e g less than 2 m s and 3 These

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ارائه ساختار و طراحي بهينه برداشتگرهاي انرزي باد پيزوالكتريكي باند وسيع شامل مدارهاي واسط مجتمع

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