Re: Power supply for Servos - Energy dump and such

>
> As Mariss has documented over and over, they do not come apart at
> less. once you move above the 7amps, 80 volts you start exchanging
> speed and power for unit life. I think at 118 volts you get
> bragging rights of the most power for the better part of a minute.
>

I didn't mean to insinuate that you should run the drives at 100
volts. I was just trying to point out that this is the rating of
the components in the drive. And as you said, you should apply
derating from there for drive life.

Wally


--- In CAD_CAM_EDM_DRO@yahoogroups.com, "turbulatordude"
<dave_mucha@y...> wrote:

>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "cnc_4_me" <cnc4me@g...>
> wrote:
> >
> > >I'm building another control and I'm going to use a 1000va at 62
> > volts. The DC will be >88 volts and the Geckos should handle it.
> > Marris said they actually come apart at 118 >volts and 30 amps
> > >
> > > Ron
> >
> >
> > Stop the presses. Be careful there. Yes Mariss did say the

drives

> > will come apart at 118 volts. But he didn't mean they could run
> > there. Fact is, most of the high voltage components in gecko
> drives
> > are rated for 100Vdc. The caps, and fets are 100Vdc parts.
> >
> > Wally
> >
>
> If you can read between the lines, Gecko's servo drivers are 100
> volt, 10 amp units with a 70 de-rating for cuttent and a 20%

derating

> for voltage.
>
> As Mariss has documented over and over, they do not come apart at
> less. once you move above the 7amps, 80 volts you start exchanging
> speed and power for unit life. I think at 118 volts you get
> bragging rights of the most power for the better part of a minute.
>
> But, if you read the recent post about servo's and how to size them
> using power for the machine, Mariss points out that most of us run
> much more voltage than we either need or use and wind up with hot
> motors for no logical reason.
>
> If you really need to get that power, considder bigger motors.
>
> Dave