From: "Harry Dellamano"
Subject: Re: A brief stroll over the Steinmetz Bridge
Date: Sun, 1 Dec 2002 15:26:06 -0800
Organization: Posted via Supernews, http://www.supernews.com
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"analog" wrote in message
> This curious and elegant circuit is supposedly attributed to Charles
> Proteus Steinmetz, the little dynamo of a man who pioneered the study
> of ac circuits at the beginning of the twentieth century. (Looked but
> couldn't find any references to it on the web.)
> | L | || C |
> | ,-*-. |
> | ( Vac ) |
> | `-.-` |
> | C || | L |
> | || |
> | |
> | R |
> Note that the L and C pairs are of equal value and that the voltage
> source operates at a fixed frequency (the line frequency, for example).
> Magnetically coupling the L pair will have no effect on circuit action.
> Now if the capacitors and inductors are chosen such that they are
> resonant at the frequency of the ideal ac voltage source then the
> Steinmetz bridge circuit converts it to an ideal ac current source of
> V/sqrt(L/C) at the load. A short circuit at the output presents the
> input with an open circuit (think about it, the Ls and Cs are now in
> parallel). If the load is removed and the output circuit goes open,
> input current and output voltage will rise until something arcs over.
> Very handy for driving carbon arc lamps, I suppose.
> Notice that since the Steinmetz bridge is completely symmetrical, the
> input and output corners of the bridge are interchangeable. In fact,
> this circuit not only converts ideal source types, it functions as a
> general impedance to admittance converter (but, alas, only at its
> single resonant frequency).
> Almost as much fun as the X converter, eh? -- analog
Analog, you are killing me! I am still scratching my head over the
X-Converter. It's been only seven days since it's submittal, we need more
regards, keep up the very interesting stuff