{"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\/ro\/blog\/news\/amerikanczy-predlozhili-sobirat-energiyu-dlya-interneta-veshhej-iz-magnitnyh-polej-blizhajshej-elektroprovodki","title":{"rendered":"Americanii au propus colectarea energiei pentru Internetul lucrurilor din c\u00e2mpurile magnetice ale celei mai apropiate re\u021bele electrice.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Tema ob\u021binerii energiei electrice din \u201eaer\u201d \u2013 din zgomot electromagnetic, vibra\u021bii, lumin\u0103, umiditate \u0219i multe altele \u2013 preocup\u0103 at\u00e2t cercet\u0103torii civili, c\u00e2t \u0219i colegii lor \u00een uniform\u0103. Contribu\u021bia sa la acest subiect a fost adus\u0103 de oamenii de \u0219tiin\u021b\u0103<\/a><\/noindex> de la Universitatea de Stat din Pennsylvania. Din c\u00e2mpurile magnetice ale cablurilor electrice din apropiere, ei au reu\u0219it s\u0103 extrag\u0103 electricitate cu o putere de c\u00e2\u021biva miliwati, suficient\u0103, de exemplu, pentru a alimenta direct un ceas digital.<\/p>\n

\"Americanii<\/p>\n

\u00cen articolul publicat \u00een revista Energy & Environmental Science<\/a><\/noindex> oamenii de \u0219tiin\u021b\u0103 au vorbit despre calcule \u0219i despre fabricarea unor convertizoare speciale ale c\u00e2mpurilor electromagnetice \u00een curent electric. Elementul de extragere este realizat sub forma unei pl\u0103ci sub\u021biri stratificate cu un magnet permanent la cap\u0103tul liber (cel\u0103lalt cap\u0103t al pl\u0103cii este fixat \u00een siguran\u021b\u0103). Placa \u00een sine este alc\u0103tuit\u0103 dintr-un strat de piezoelectric \u0219i un strat de material magnetostrictiv<\/a><\/noindex> (Fe85B5Si10 Metglas).<\/p>\n

Materialul magnetostrictiv este interesant deoarece, la schimbarea st\u0103rii de magnetizare, volumul \u0219i dimensiunile sale lineare se modific\u0103. Zgomotul enervant din bobinele pl\u0103cilor grafice este, de obicei, rezultatul modific\u0103rilor magnetostrictive din miezuri. \u00centr-un c\u00e2mp magnetic alternativ de frecven\u021b\u0103 de 50 sau 60 Hz, placa din Metglas \u00eencepe s\u0103 vibreze \u0219i s\u0103 deformeze placa de piezoelectric lipit\u0103 de ea. \u00cen re\u021beaua conectat\u0103 la pl\u0103ci, curentul \u00eencepe s\u0103 curg\u0103.<\/p>\n

\"Americanii<\/p>\n

Cu toate acestea, materialul magnetostric\u021bional, \u00eempreun\u0103 cu piezoelectricul, produce doar p\u00e2n\u0103 la 16 % din energia electric\u0103 generat\u0103 de element. Principala produc\u021bie este dat\u0103 de oscillarea unui magnet permanent \u00een c\u00e2mpul electromagnetic. Se sus\u021bine c\u0103 tensiunea de v\u00e2rf pe element ajunge la 80 V \u00een c\u00e2mp cu o for\u021b\u0103 de 300 \u00b5T. Dar cel mai valoros aspect este c\u0103 elementul dezvoltat ar putea ob\u021bine suficient\u0103 energie pentru alimentarea direct\u0103 a ceasurilor digitale \u00een c\u00e2mpuri de sub 50 \u00b5T la o distan\u021b\u0103 de 20 cm de cabluri electrice.<\/p>\n

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Cercet\u0103rile sale au fost realizate de oamenii de \u0219tiin\u021b\u0103 de la Universitatea de Stat din Pennsylvania \u00een colaborare cu cercet\u0103torii de la Virginia Tech \u0219i cu grupul Comandamentului pentru Dezvoltarea Capacit\u0103\u021bilor de Lupt\u0103 ale Armatei Statelor Unite.<\/p>\n

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

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