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Re: (ET) E15 alltrax death



At 09:02 AM 12/4/2007 -0500, David Roden wrote:
On 4 Dec 2007 at 7:42, Konstanty, Walter (GE Indust, ConsInd) wrote:

> The motor can't generate a spike as
> it's a resistive element.

What kind of motor is pure resistance?  All the motors with which I'm
acquainted, being electromagnetic devices, have some amount of inductance.
Some types have more than others, of course.

That said, my gut reaction is that the PTO contactor is the likely culprit,
mainly because I've seen HUGE spikes from contactors without suppression
diodes.

That seems likely to me as well.


> if the voltage drops low enough it might "shut off" the Alltrax SCR's.

I'm pretty sure the Alltrax is a MOSFET design.

I'd be surprised if it wasn't. I don't think SCR's have been used in new designs for 15 to 20 years.

Robert

Another sign of the end of civilization, our technical magazines are getting chatty
From an EETimes product descriptions 2006/08/09
".... systems that can sample gobs of inputs simultaneously"
Now just what is the technical definition for gobs again?
http://www.aeolusdevelopment.com/