Re: (ET) E15 Alltrax died

[Robert Adsett <subscriptions aeolusdevelopment com>]

At 06:34 PM 12/3/2007 -0500, Tom G wrote:
> Correct me if I am wrong but going by memory.
> #1 the blower is a series motor not PM.

If that's the case braking effectively won't be possible with a simple 
shorting contactor.

> #2 Is it not hooked up via a contactor

It must be.  I suppose you could just plug and unplug it but otherwise you 
need a contactor and/or a controller.

> so I guess it is possible for a spike to develop from the contactor when 
> shut off.
> I would check with Alltrax to verify proper hookup and weather a spike 
> from that contactor is enough to cause a problem.

It will be.  If not, they are the only controller manufacturer not to have 
an issue with suppression.  It may, however, take many multiple hits before 
a problem is seen.

Robert

http://www.aeolusdevelopment.com/

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