Wireless sensing applications have extended into power transmission line monitoringapplications. Minimal power consumption of sensor electronics have enabled kinetic energyharvesting systems to provides a means of self sustainability in the form of parasitic energyharvesting from power transmission lines. With this goal in mind, a miniature piezoelectricbimorph cantilever harvester has been developed using a magnetic tip mass which interactswith the oscillating magnetic flux surrounding power transmission wires. The focus ofthis thesis is develop an analytical model which can be used to optimize the amountof piezoelectric material to support sensory electronics. Special emphasis has also beenplaced on magnet orientation and geometry to ensure optimal magnetic flux interactionbetween input and output mechanisms. A single prototype harvester is designed with anarbitrary piezoelectric material length and experimentally validated at different conductorwire currents. The analytical model shows excellent agreement in frequency predictionfor the prototype tested. Two damping techniques are used to experimentally extractmodal damping ratios to predict peak mechanical and electrical responses at resonancefrequencies. The miniature prototype design is less than 30 mm in length with only 10 mm piezoelectric material to produce a total volume of 154 10^-12 cm^3. The power output ismeasured at 174.1W of power when positioned over top a 10 AWG copper conductor adistance of 6 mm with approximately 16 Amps of current passing though the conductor.
【 预 览 】
附件列表
Files
Size
Format
View
Design, Modelling, Fabrication & Testing of a Miniature Piezoelectric-based EMF Energy Harvester
PDF
download
878987797
028-85220240
