Re: stepper driver help

The reality is probably somewhere between those two extremes. Most of the
power dissipation in a FET switching system occurs during switching, for the
few nanoseconds when the FET is operating in the linear region of its
transfer curve.
--
Phil Mattison
http://www.ohmikron.com/
Motors::Drivers::Controllers::Software

----- Original Message -----
From: John Dammeyer <johnd@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, September 27, 2007 5:40 PM
Subject: RE: [CAD_CAM_EDM_DRO] Re: stepper driver help


> Hi Steve,
>
> Nice to know people actually read what I write and catch the big
> mistakes. Thanks. Silly me.
>
> John Dammeyer
>
>
> > >with 50W dissipation. Smell that magic smoke!
> > >
> > >
> > Even better, it would be 2500W! :)
> > 50V across a 1-ohm load gives 50A, and 50V * 50A = 2500W. (P=V^2 / R)
> > In practice, the magic smoke would prevent this much dissipation well
> > before that was reached.
> >
> > - Steve
> >
>
>
>
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