Re: [CAD_CAM_EDM_DRO] gecko 320 filter capacitor values

What type of power source are you hooking this up to? A 60Hz transformer?

38A is phenomenally high. I doubt this is actually going to be in you
design criteria, because it would be crazy high. Basically, you'd need
to first figure out the maximum load the servo would actually USE based
on the desired acceleration and table mass.

Danny

> -----Original Message-----
> From: CAD_CAM_EDM_DRO@yahoogroups.com [mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of dcassyc1
> Sent: Thursday, February 26, 2009 12:05 AM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: [CAD_CAM_EDM_DRO] gecko 320 filter capacitor values
>
> Hi all,
> I'm looking for advice on sizing power supply filter capacitors for Gecko 320
> servo drives, used to power 2 separate servo applications.
> First application is for 1 servo motor rated with these specs:
> terminal voltage: 72 VDC continuous current: 8.5A peak current: 38A. How
> large should the filter capacitor be? Would a 100VDC rating be sufficient for
> this 72 volt supply? How many MFD?
> Second application is for 2 motors with these ratings:
> terminal voltage 60 VDC continuous current 3.5A peak current 20A. Would a
> 75 VDC capacitor be sufficient for this 60 VDC supply? How many MFD?
> Is there a formula that is available to calculate the mfd value?
> Is there a recommended maximum ripple voltage?
> cheers,
> Denis
>