Abstract
A newcontactless piezoelectric (PZT) wind energy harvester is constructed and a feasibility study on its power generationmechanism is carried out for a wireless weather station. The new harvester has a magnetic unit enabling to vibrate aPZT layer in a contactless manner. The poles of magnets are oriented in such a way that the tip of the layer is always repelled, when wind rotates the harvester shaft. Therefore the produced magnetic force exerts mechanical bucklings on the layer and this effect produces electricity. After one-year operation, it is clarified that an averaged power of 20 µW–60 µW can be obtained monthly for the feeding of the station. These results prove that 5 %–18 % of the consumed power of wireless station can be generated by the harvester depending on the wind regime in the region. DOI: http://dx.doi.org/10.5755/j01.eee.20.10.8871
Highlights
There is a growing study on long-life power supplied electrical devices such as sensor nodes, unmanned aerial vehicles, and pacemakers [1]–[3]
This paper highlights whether the weather station being far away from any electrical network can be fed at low wind speeds and to which extend the life-span of the battery can be charged via new harvester
Every rotation creates a vibration and that is converted to the electrical potential on the PZT layer. This wind energy harvester is a novel one with that respect, since there is no wind energy harvester including permanent magnet having contactless operation in the literature
Summary
There is a growing study on long-life power supplied electrical devices such as sensor nodes, unmanned aerial vehicles, and pacemakers [1]–[3] In addition to these micro structures, macrostructures such as bicycles, shoes, arm and leg connected piezo-powered systems have been explored [3]–[6]. There exist a plenty of researches especially in recent years in order to overcome the artifacts of the batteries and the addition of harvesting systems to them [12]–[14] In this manner, energy harvesting applicationscan be performed in different sources such as ambient mechanical vibrations, thermoelectric, solar, gas/liquid and wind [15]–[17]. This paper highlights whether the weather station being far away from any electrical network can be fed at low wind speeds and to which extend the life-span of the battery can be charged via new harvester.
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