From: "JACK L. URETSKY (C) 1996; HEP DIV., ARGONNE NATIONAL LAB, ARGONNE, IL 60439" <JLU@hep.anl.gov>
Date: Mon, 20 May 1996 11:58:54 -0500 (CDT)
Hi Alex-
I think that you are ignoring "leakage inductance", which turns
out to be the culprit in this case.
At any rate, the circuit can be analyzed in the frequency domain
(steady state in the time domain).
Thanks for the Variac tip.
Regards,
Jack
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There are several comments which can be made about the dimmer controlled
power supply. some of the following comments are dependant on the exact
nature of the filter and load on the power supply.
-
The first thing to note is that the trandformer is unlikely to
present an inductive load to the dimmer. If the load on the transformer
is resistive, the transformer input impedance is resistive also.
-
The dimmer generates steep sided waveforms by cutting the input 60 HZ
wave to zero at an adjustable time after a zero crossing. That way
the power to an incadesent light bulb is reduced BUT when that
steep wave form hits the transformer a very high voltage is output.
-
A veriac autoformer could be used instead of the dimmer. 100w
autoformers are often available on the surplus market.
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