In Reply to: Re: Whatever happend to center tapped chokes?? posted by fatbottle on June 18, 2002 at 02:34:32:
it would work, but don't expect to put more than 115vac across the primary--more than that (i'd say around 130) will saturate the core.
you could test the max input voltage with a variac and a current meter... with just the primary across the line, slowly increase the input voltage. the large reactance of the winding @ the line frequency will prevent much current from flowing. as you continue to advance the input voltage with the variac, when the current drawn from the line increases greatly you know you have reached the point of saturation, and that represents the max primary voltage that will be tolerated.
What I don't understand is the voltage part. Is it not current that determines saturation. Or is it the combination of the 2..
its a combination of the two.
its AC voltage and DC current that causes the core to saturate.
the more DC current the less room you have for AC voltage.
On mains, which is more or less unlimited currentwice, a 30% voltage overload would make the flux to "break down" and one has a current rush...
A 2*110V 50Hz will have a larger margin than a 2*110V 60Hz, and a 0/230/480-50Hz would make it :-)
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