Converter In-Rush Thermistors etc, UPDATE -4
UPDATE on 17 Nov, Update 2 on 22 Nov, Update 3 on 16 Jan 14, Update 4 on 19 Oct 14. --------------- In a recent thread there was mention of how you can wreck your gizmo (in my case a converter) ...
Forum Discussion
In the lesson example they use a 2000VA transformer. My converter is PF corrected. I have seen two different specs for its 120v input required, but it is supposed to work on a 15a circuit so pretend it is 1800VA.
On page 7/10 in the lesson they do a calculation for Isteady, but I keep getting 25.7a in their example where they get 30 something. Is their calculation wrong?
anyway, using their method, 1.8/1.0(it is PF corrected) x 100v (I don't know why they use 90v for a minimum) I get 18a for Isteady.
Not sure how that fits with the supposed 13a draw of the converter in its spec. 18 is over 15 so that would pop the 15a circuit breaker?
I have a 20a thermistor in there now and it runs the converter ok steady state, whatever is really supposed to be going on.
They do R based on the transformer spec, no mention of the 2300uf worth of capacitors, so that is different from on here where guys use the capacitor value to get minimum R. Can I pretend I have the same transformer they used with 2000VA if mine is indeed around 1800? That would put R between 1 and 2 like theirs?
I am also pretending their input schematic is the same as my converter's for diodes etc and my 2400uf is close to their 2300uf.
On page 7/10 in the lesson they do a calculation for Isteady, but I keep getting 25.7a in their example where they get 30 something. Is their calculation wrong?
anyway, using their method, 1.8/1.0(it is PF corrected) x 100v (I don't know why they use 90v for a minimum) I get 18a for Isteady.
Not sure how that fits with the supposed 13a draw of the converter in its spec. 18 is over 15 so that would pop the 15a circuit breaker?
I have a 20a thermistor in there now and it runs the converter ok steady state, whatever is really supposed to be going on.
They do R based on the transformer spec, no mention of the 2300uf worth of capacitors, so that is different from on here where guys use the capacitor value to get minimum R. Can I pretend I have the same transformer they used with 2000VA if mine is indeed around 1800? That would put R between 1 and 2 like theirs?
I am also pretending their input schematic is the same as my converter's for diodes etc and my 2400uf is close to their 2300uf.
