Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!ames!ucsd!ucsdhub!esosun!seismo!uunet!amara!khai From: khai@amara.uunet (Sao Khai Mong) Newsgroups: sci.electronics Subject: Re: Free power from 'whispering wires' ?? Message-ID:Date: 7 Jul 88 06:59:29 GMT References: <3170@tekgen.BV.TEK.COM> Sender: khai@amara.UUCP Organization: Applied Dynamics International, Inc. Lines: 42 In-reply-to: steves@tekgen.BV.TEK.COM's message of 1 Jul 88 20:09:51 GMT In article <3170@tekgen.BV.TEK.COM> steves@tekgen.BV.TEK.COM (Steve Shellans) writes: > If it's a DC transmission line, you would have to rotate the inductor > thru the field. Couldn't this be accomplished by a motor that ran > off (some) of the power that you were extracting? Of course, it > would have to be started by hand. No, you can't from a DC line. The juice you get out of the inductor will be your mechanical energy input. You are talking about perpertual motion here. Before you get to a DC xmission line, might try your theory by using a permanent magnet first! > 1. Are the transmission wires far enough apart that you could get the > magnetic field from one of them without being cancelled out by > the other(s)? Alternatively, how could the device be shielded > so that it 'saw' only one wire? You could use some iron or steel plates in some configuration, in theory. > > 2. Does anyone know how to do the calculations to see how much power > you could get as a function of voltage and current thru the > transmission line, distance from the line(s), and size of the > inductor? Very little energy can be obtained for practical purposes. Cost/kw will be enormous. I have heard that you can light up flourescent lights under HT AC wires, but they light up due to the electric field, not the magnetic field. > 4. What percentage of the high-voltage lines that one sees in the > countryside are AC and what percentage are DC? Almost all are AC. I think that there are probably fewer than ten DC links in the US, and probably not more than twenty in the world. -- --------------------+------------------------------------------------------- ...uunet!amara!khai | Applied Dynamics International, 3800 Stone School Road khai@amara.uucp | Ann Arbor, Michigan 48105, U.S.A (313) 973-1300 --------------------+-------------------------------------------------------