OPOMNIK: IJS KOLOKVIJ, Sreda, 16. 05. 2018; ob 13. uri; prof. dr. Kenji Uchino

[Tanja Debevec]

Vabimo vas na 15. predavanje iz sklopa "Kolokviji na IJS" v letu 2017/18, ki bo v sredo, 16. maja 2018, ob 13. uri v Veliki predavalnici Instituta »Jožef Stefan«  na Jamovi cesti 39 v Ljubljani. Napovednik predavanja najdete tudi na naslovu http://www.ijs.si/ijsw/Koledar_prireditev, posnetke preteklih predavanj pa na http://videolectures.net/kolokviji_ijs. 

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prof. dr. Kenji Uchino

The Pennsylvania State University, State College, ZDA

Sistemi za piezoelektrično zbiranje energije

Zbiranje neizkoriščene ali neuporabljene energije je že dolgo aktualna tema. V predavanju se bomo osredotočili na zbiranje energije iz mehanskih vibracij s piezoelektričnimi pretvorniki, pri čemer bomo obravnavali tri glavne faze tega procesa: (i) prenos mehanske energije vključno z mehansko stabilnostjo piezoelektričnega pretvornika pri velikih napetostih in mehanskim impedančnim ujemanjem, (ii) pretvorbo mehanske energije v električno, ki je povezana z elektromehanskim sklopitvenim faktorjem piezoelektričnega pretvornika, in (iii) prenos električne energije vključno z ujemanjem električne impedance, kar omogoči shranjevanje energije v baterijo za ponovno polnjenje. Običajno se raziskovalci ukvarjajo le z ozkim raziskovalnim področjem, ki se nanaša na eno od omenjenih faz. Podali bomo smernice za celovito strategijo za izboljšanje učinkovitosti sistemov za piezoelektrično zbiranje energije. 

Predavanje bo v angleščini.

Lepo vabljeni!

 

 

 




We invite you to the 15th Institute colloquium in the academic year 2017/18. The colloquium will be held on Wednesday May 16, 2018 at 1 PM in the main Institute lecture hall, Jamova 39, Ljubljana. To read the abstract click  http://www.ijs.si/ijsw/Koledar_prireditev. Past colloquia are posted on  http://videolectures.net/kolokviji_ijs.

 

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prof. dr. Kenji Uchino

The Pennsylvania State University, State College, USA

 

Piezoelectric energy harvesting systems

 

Energy harvesting from wasted or unused power has been the topic of discussion for a long time. This contribution focuses on harvesting energy from mechanical vibrations using piezoelectric transducers. Three major phases/steps associated with piezoelectric energy harvesting are considered: (i) mechanical-mechanical energy transfer, including mechanical stability of the piezoelectric transducer under large stresses, and mechanical impedance matching, (ii) mechanical-electrical energy transduction, relating with the electromechanical coupling factor in the composite transducer structure, and (iii) electrical-electrical energy transfer, including electrical impedance matching, such as a DC/DC converter to accumulate the energy into a rechargeable battery. The problem found in the current research teams is on a narrow research area of each above phase. In order to provide comprehensive strategies on how to improve the efficiency of the harvesting system, general guideline for piezoelectric energy harvesting systems is provided.

 

Cordially invited!

 

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