{"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\/da\/blog\/news\/amerikanczy-predlozhili-sobirat-energiyu-dlya-interneta-veshhej-iz-magnitnyh-polej-blizhajshej-elektroprovodki","title":{"rendered":"Amerikanere har foresl\u00e5et at indsamle energi til Internet of Things fra magnetiske felter fra n\u00e6rliggende elektriske ledninger","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Emnet om at udvinde elektricitet fra «luften» - fra elektromagnetisk st\u00f8j, vibrationer, lys, fugtighed og meget mere - interesserer b\u00e5de civile forskere og deres kolleger i uniform. Deres bidrag til dette emne blev givet af forskere<\/a><\/noindex> fra Pennsylvania State University. Fra de magnetiske felter fra n\u00e6rliggende elektriske ledninger kunne de udvinde elektricitet med en kapacitet p\u00e5 flere milliwatt, hvilket er tilstr\u00e6kkeligt til eksempelvis at drive et digitalt v\u00e6kkeur direkte.<\/p>\n

\"Amerikanere<\/p>\n

I en artikel offentliggjort i Energy & Environmental Science<\/a><\/noindex> berettede forskerne om beregningerne og fabrikationen af specielle omformere af elektromagnetiske felter til elektrisk str\u00f8m. Det udvundne element er udf\u00f8rt som et multilags tyndt plade med en permanent magnet i den frie ende (den anden ende af pladen er sikkert fastgjort). Selve pladen best\u00e5r af et lag piezoelektrisk materiale og et lag af magnetostriktivt<\/a><\/noindex> materiale (Fe85B5Si10 Metglas).<\/p>\n

Det magnetostriktive materiale er interessant, fordi dets volumen og line\u00e6re dimensioner \u00e6ndres, n\u00e5r dets magnetiseringstilstand \u00e6ndres. Den irriterende summen fra spolerne i grafikkort er typisk magnetostriktive forandringer i kernerne. I et vekslende magnetfelt fra almindelige elektriske ledninger med en frekvens p\u00e5 50 eller 60 Hz begynder pladen af Metglas at vibrere og deformere det piezoelektriske lag, der er limet til den. Der begynder at flyde str\u00f8m i netv\u00e6rket, der er tilsluttet pladerne.<\/p>\n

\"Amerikanere<\/p>\n

Men magnetostriktive materialer i kombination med piezoelektrik genererer kun op til 16 % af den elektricitet, der produceres af elementet. Den prim\u00e6re produktion leveres af oscillationen fra en permanent magnet i et elektromagnetisk felt. Det h\u00e6vdes, at den maksimale sp\u00e6nding p\u00e5 elementet n\u00e5r 80 V i et felt med en styrke p\u00e5 300 \u00b5T. Men det mest v\u00e6rdifulde er, at det udviklede element kunne udvinde tilstr\u00e6kkelig energi til at drive digitale ure direkte i et felt p\u00e5 mindre end 50 \u00b5T fra en afstand af 20 cm fra elektrisk ledning.<\/p>\n

<\/center><\/p>\n

Forskningen blev udf\u00f8rt af forskere fra Pennsylvania State University sammen med forskere fra Virginia Tech og en gruppe fra det amerikanske h\u00e6rens enhed for udvikling af kampkapaciteter.<\/p>\n

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

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