JR&Son said:
Sorry cant help on the Steamer.
I have my first knock up of the Power Supply.
Cramed everything I needed into a SFX Computer Power Supply case.
It is just the Power Supply, no speed regulation for the time being.
I guess this is a proof of concept.........
Im puzzled though over the different taps on the Xformer.
I have it tapped of of the 16 volt for the time being, seriousley considering installing a switch to allow taping off the 16 OR 24 volt. That way when we have huge loads or multiple engines I would have the punch I needed.
JR&SON
`BAD IDEA' 16vac is a bit higher(but not too high) to use as the Tx secondary voltage
24v-would be around 18vdc(btw forget about using caps as filters in a dc layout- totally unneeded at all)
if the Tx amps is sufficent then boosting the voltage is unness... and if the amperage is too low then trying to compensate by boosting the volts is a really reaaallllyy bad idea
escaping smoke bad
Couple of Tech Questions:
#1 One already mentioned, Multi engines I know require higher amps, where does voltage come into play? Indirectly in the current equation Im guessing?
same voltage ie 12vdc just different amps-bit like a car taillight and a mega shooting spotlight..both 12vdc-one draws mA the other 10's of amps- put either on 240v(probably 110v where you are) and both go bang....
#2 Voltage ripple on the DC side, how much does the ripple come into play. The Tyco had no caps. I included 1 220uf on the prototype. Im assuming less is better. Does it help engine cooling? Keep in mind I do not have access to an Oscope so Im basically throwing the cap/caps at the end circut as good housekeeping
no caps required at all for dc engines.....unless....
some psu's actually used large value caps not for filtering-but as throttle/braking substitutes..
due to the delay used to bring track voltages up/down they could simulate braking and acceleration
but a pure dc loco (ie not dcc) requires zero/zip/zilch filtering to run at all
