Re: [CAD_CAM_EDM_DRO] gecko 320 filter capacitor values

HI Danny,
it's 38Amps peak current, not steady state. I suppose it will only peak for
short times when doing rapid traverse. Yes, it's connected to 60 cycle toroid,
through a bridge.
cheers,
Denis

On Wednesday 04 March 2009 17:20:06 Danny Miller wrote:
> 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