Re: [CAD_CAM_EDM_DRO] Sizing a power supply

In a message dated 6/12/00 8:25:37 PM Hawaiian Standard Time,
jmelson@... writes:

<< So, 160,000 uF would be a good capacitance for a 10 A
power supply.

Jon >>


Jon E.,
I am running three Applied Motion Products 7080 drives in 1/2 step mode.
I have them connected to an old Northern Telecom 48 volt 40 amp supply. I am
now happy with this setup and was amazed at the improvement in performanace
of the motors when I went from 3-36 volt 10 amps PS's. Since my drives are
rated at 7 amps at 80 volts, I'm interested in building a higher voltage PS
like Jon A. I was thinking of using a 2? KVA buck/boost transformer. I'd
connect 120 volts to the "240 in" terminals. The "120" out would have
approximately 60 volts out. Run this through a large bridge rectifier and on
to large filter caps with bleed resistors. Would this be a workable design?
I'm not real sure what the resultant output voltage would be. I thought it
was somthing like 60 times the square root of 2? I think one could vary the
output voltage slightly if the transformer has 208,220,240 and 277V inputs
taps. An electrical designer I ain't.

Peter
THRD, Inc.