Capacitor sizing question

Hi all,

I'm a little on the fence here and hope someone can offer some
guidance.


With a 40 volt transformer and a bridge rectifier I should be getting
38.8 volts before the cap. After the filter cap, the voltage would
be 54.8 volts.

For the motors, the calculation says 8,000uF so with a cap of 5,600uF
at 63 volts I can parallel two of them and get more than enough
capacatance, but am I cutting the voltage too close ?

I'll be using Gecko's with a 470uF-100v on each Gecko.

Typically the rule of thumb is 20% over for caps and this is only 10%
over.

This is for a plasma table and hopefully high rapids as the norm for
cutting.

Any recomendations for the caps ? am I being greedy for trying to
use a $1.50 capacitor (on sale) or should I get a much larger voltage
capacitor ?

Dave