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Re: (ET) E15 Alltrax died



Tom G wrote:
Correct me if I am wrong but going by memory.
#1 the blower is a series motor not PM.

Correct. Though I do believe it has a small compound winding in there to keep it from spinning to infinity if the chain skips. I know this to be the case because I also have a tiller which has the same motor. When the belt slips it spins but does not self-destruct.

#2 Is it not hooked up via a contactor so I guess it is possible for a spike to develop from the contactor when shut off.

Not correct. It uses the big mower contactor. However there is no brake due to the lack of it being a PM motor.

And yes, it throws a voltage surge when shut down. I can see
I would check with Alltrax to verify proper hookup and wea;'ther a spike from that contactor is enough to cause a problem.


At 01:08 PM 12/3/2007, you wrote:
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To all you guys running with the Alltrax controller. The first time I went to blow snow with my new (to me) rebuilt snow thrower my Alltrax died. After two years of mowing an acre a week it seems odd that it happens the first time I ran the blower. Everything still functions on the tractor but there is no life on the Alltrax LED and no signal to close the main contactor. I swapped the Alltrax and everything is wonderful, but I do not want to smoke another. Question is, does the snow thrower generate a voltage spike when shutdown? The power cord only has 2 wires hooked up to the drive, should the third be used ala the mower drive?
Should there be a clamping diode in use?
Thanks to whoever knows. John Jeno
E-15 (2)
E-scrap (3)
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