Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!rutgers!umn-d-ub!umn-cs!ns!logajan From: logajan@ns.ns.com (John Logajan x3118) Newsgroups: sci.electronics Subject: Re: Free power from 'whispering wires' ?? Summary: Tapping energy from power lines is un-economical. Keywords: power transmission Message-ID: <320@ns.ns.com> Date: 6 Jul 88 21:44:54 GMT References: <3170@tekgen.BV.TEK.COM> Organization: Network Systems Corp. Mpls MN Lines: 15 In article <3170@tekgen.BV.TEK.COM>, steves@tekgen.BV.TEK.COM (Steve Shellans) writes: > Would it be possible to tap part of the energy from those high voltage > power transmission lines? It is possible to place an inductor near any AC source and tap some of the energy present. The problem is that the field density is very low and the coupling (distance etc) is not good. So you really can't get much power out of such a scheme. To draw power from a DC field by 'rotating' your inductor would require that you put in as much (more actually) power as you get out. Your just using a permenant magnet type field. Again the fields around DC lines are very weak. Also I believe there are a lot more AC lines than DC, but I am not sure about that. - John M. Logajan @ Network Systems; 7600 Boone Ave; Brooklyn Park, MN 55428 - - {...amdahl!ems, ...uunet!rosevax, ...rutgers!dayton} !umn-cs!ns!logajan -