Transformer Sizing for DC Supplies
Posted by
Kevin R. Walsh
on 2004-09-20 10:12:41 UTC
I know this topic has been covered ad nauseum, but I couldn;t find a
precise answer, so her goes again:
Building a DC supply. Converting my Bridgeport Series I Rigid Ram
to servos, and intend to use 3 Gecko G320 amps. The motors are
spec'ed over the 80V 20A that the Geckos can handle, so I am using
that as a baseline. I want this to be a regulated supply, so I need
a bit of headroom over the 80V, but not much. What are people
seeing for typical Amperage usage on a full size mill like this? I
know I don't need 20A x 3motors = 60A, especially given the huge
pile of capacitors I took out of the original cabinet. So, what
should I size the supply to? 80V at 60A is almost 5000VA at the
transformer! Yikes!
Second, I am building the box to be supplied by my 230VAC single
phase power. Is there not one transformer in the original box ( I
counted at least 8 of them on my floor!) that will get me to where I
need to be?
Thanks in advance, and sorry if we're all tired of this topic.
precise answer, so her goes again:
Building a DC supply. Converting my Bridgeport Series I Rigid Ram
to servos, and intend to use 3 Gecko G320 amps. The motors are
spec'ed over the 80V 20A that the Geckos can handle, so I am using
that as a baseline. I want this to be a regulated supply, so I need
a bit of headroom over the 80V, but not much. What are people
seeing for typical Amperage usage on a full size mill like this? I
know I don't need 20A x 3motors = 60A, especially given the huge
pile of capacitors I took out of the original cabinet. So, what
should I size the supply to? 80V at 60A is almost 5000VA at the
transformer! Yikes!
Second, I am building the box to be supplied by my 230VAC single
phase power. Is there not one transformer in the original box ( I
counted at least 8 of them on my floor!) that will get me to where I
need to be?
Thanks in advance, and sorry if we're all tired of this topic.