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chris2010

Winch motor

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What would cause this motor to self destruct ?

12v system.

Pulling a Landy up at slope,

Motor slowed up and stopped

A winch I bought of someone apparently it was a good one.

Husky 8 winch

post-86806-0-54450000-1420498850_thumb.jpg

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i cant see from the picture (im blind) but have some of the contacts come off the commutator?

this would most definately cause it to stop working and more than likely jam it up too

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Yes they have I can see what's jammed it,

But what causes this ? Guy I bought it of said it was a good motor,

Winch always struggled. Used it about twice, never stalled the motor .

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If you don't get an answer tonight I will forward the picture to the DC motor specialist I use at work in the morning.

We use lots of big (>200KW) DC motors but I've never seen a commutator fail like that.

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Exploding com is traditionally from over speeding. Maybe it had a brake fail at some time, starting a crack? Never seen it on a winch motor, so the fault could be specific to that motor? I'd say you were unlucky on that one.

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it could always be down to poor workmanship of the original motor, especially if its not done that much work and always been slow

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This is the highly technical response from my DC motor specialist :ph34r:

"Looks to me like carp down the slots which would eventually short bar to bar, a good rake out now and again needed"

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Exploding com is traditionally from over speeding. Maybe it had a brake fail at some time, starting a crack? Never seen it on a winch motor, so the fault could be specific to that motor? I'd say you were unlucky on that one.

Husky is on a worm and wheel, no brake to fail.

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Sounds fair. Dodgy commutator then.

I'll retract the crack theory as well. I know things have a crack start leading to disaster, but I think a com would just pop if there was any weakness from speed.

Even heat seems out. One wire looks darker, but the RH is nice shiny copper.

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I've blown a few motors competing. There's 2 reasons really. Over reving, which isn't going to happen on a husky! The other is heat! Working hard & long will make things hot, as will a battery that's a bit tired or flat. Motors don't like working with low volts.

Cheap motors, even warn xp's use soldered comutators, the solder melts, end of motor.

One main reason most challenge competitors use bow motors is that the coms are copper braised.

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I've blown a few motors competing. There's 2 reasons really. Over reving, which isn't going to happen on a husky! The other is heat! Working hard & long will make things hot, as will a battery that's a bit tired or flat. Motors don't like working with low volts.

Cheap motors, even warn xp's use soldered comutators, the solder melts, end of motor.

One main reason most challenge competitors use bow motors is that the coms are copper braised.

^^^ what he said, overloaded i think

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