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[a-w-h] Re: A/C vs D/C for 1-mile run
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[a-w-h] Re: A/C vs D/C for 1-mile run
by David MacClement
26 February 2000 09:56 UTC
>>Isn't there some advantage in A/C
>
At 08:21 26/02/00 +0000, Hugh (on his travels to CAT in Wales for the
windpower course this weekend) wrote:
>Losses in wires depend on the square of the current. For a certain average
>current you will get the lowest square if it is constant i.e. DC. AC at
>the same voltage will have a slightly higher square, so slightly higher
>losses because it varies.
>
** For (arithmetic) average, yes; but "AC at the same voltage will have a
slightly higher square" can't be so, since that voltage is the RMS voltage
(root mean Square), in order to get the same heating effect.
David.
(David MacClement) d1v9d@bigfoot.com
www.geocities.com/Athens/Delphi/3142/Pg1-AD11.html
or better: http://www.emucities.com.au/member/davd/
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