Re: [CAD_CAM_EDM_DRO] Re: gecko's and voltage

On Sat, 5 Jul 2003, Mariss Freimanis wrote:

> Other ramifications (read expensive) would be a linear voltage
> regulator would no longer be usable because of excessive dissipation.
> A switching type regulator and its attendant circuitry would have to
> be used.

I think this is why the Rutex drives use a split supply. It is a bit
annoying though having to have a separate supply.

> The drives are tested at 100VDC and come apart above 108VDC. It is
> not good practice to rate equipment at 100% of the component max
> ratings. We use 80% as the de-rating value for reliability.

Interesting. The Rutex drives are rated at 100V and they use IRF540N's.
Basically the same except for higher current. The instructions do say
that the motor supply voltage should never exceed 100V though.

So does that 80% derating mean that the Gecko's are safe to run with a no
load power supply voltage of 80V?

C|