{"id":76791,"date":"2020-04-04T19:42:31","date_gmt":"2020-04-04T17:42:31","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/amerikanczy-predlozhili-sobirat-energiyu-dlya-interneta-veshhej-iz-magnitnyh-polej-blizhajshej-elektroprovodki"},"modified":"2020-04-04T19:42:31","modified_gmt":"2020-04-04T17:42:31","slug":"amerikanczy-predlozhili-sobirat-energiyu-dlya-interneta-veshhej-iz-magnitnyh-polej-blizhajshej-elektroprovodki","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hr\/blog\/news\/amerikanczy-predlozhili-sobirat-energiyu-dlya-interneta-veshhej-iz-magnitnyh-polej-blizhajshej-elektroprovodki","title":{"rendered":"Amerikanci su predlo\u017eili prikupljanje energije za Internet stvari iz magnetskih polja najbli\u017ee elektri\u010dne \u017eice.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Tema proizvodnje elektri\u010dne energije iz «zrak» \u2015 iz elektromagnetskog \u0161uma, vibracija, svjetlosti, vla\u017enosti i mnogih drugih izvora \u2015 zanima sugra\u0111anske istra\u017eiva\u010de, kao i njihove kolege s oznakama. Njihov doprinos ovoj temi dali su znanstvenici<\/a><\/noindex> s Dr\u017eavnog sveu\u010dili\u0161ta Pennsylvanija. Iz magnetskih polja obli\u017enjih vodova uspjeli su dobiti elektri\u010dnu energiju snage nekoliko miliwatta, \u0161to je dovoljno, na primjer, za izravno napajanje digitalnog alarma.<\/p>\n

\"Amerikanci<\/p>\n

U \u010dlanku objavljenom u \u010dasopisu Energy & Environmental Science<\/a><\/noindex> znanstvenici su govorili o prora\u010dunima i izradi specijalnih pretvara\u010da elektromagnetskih polja u elektri\u010dnu struju. Sakuplja\u010dki element je izra\u0111en od vi\u0161eslojne tanke plo\u010de s trajnim magnetom na slobodnom kraju (drugi kraj plo\u010de je \u010dvrsto pri\u010dvr\u0161\u0107en). Sama plo\u010da sastoji se od sloja piezoelektri\u010dnog materijala i sloja magnetostrikcionog<\/a><\/noindex> materijala (Fe85B5Si10 Metglas).<\/p>\n

Magnetostrikcioni materijal je zanimljiv jer se prilikom promjene stanja magnetizacije njegova zapremina i linearne dimenzije mijenjaju. Naporno zujanje namota na grafi\u010dkim karticama obi\u010dno je rezultat magnetostrikcijskih promjena u jezgri. U izmjeni\u010dnom magnetskom polju obi\u010dnih vodova frekvencije 50 ili 60 Hz, plo\u010da od Metglas po\u010dinje vibrirati i deformirati plo\u010dicu od piezoelektrika koja je na nju zalijepljena. U povezanoj mre\u017ei plo\u010de po\u010dinje te\u0107i struja.<\/p>\n

\"Amerikanci<\/p>\n

Me\u0111utim, magnetostrikcijski materijal u paru s piezoelektrikom proizvodi samo do 16 % elektri\u010dne energije koju generira element. Glavnu proizvodnju daje oscilacija trajnog magneta u elektromagnetnom polju. Tvrdilo se da vr\u0161na napetost na elementu dose\u017ee 80 V u polju ja\u010dine 300 \u00b5T. No najvrednije je to \u0161to razvijeni element mo\u017ee prikupljati dovoljno energije za izravnu napajanje digitalnih satova u polju ja\u010dine manje od 50 \u00b5T na udaljenosti od 20 cm od elektri\u010dne instalacije.<\/p>\n

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Svoje istra\u017eivanje znanstvenici s Dr\u017eavnog sveu\u010dili\u0161ta Pennsylvanija provodili su zajedno s istra\u017eiva\u010dima sa Virginia Techa i grupom Zapovjedni\u0161tva za razvoj borbenih sposobnosti vojske SAD-a.<\/p>\n

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Izvor: 3dnews.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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