Re: [St] [ST]alternator troubles: follow up

[JES_VFR <jes_vfr@xxxxxxxxxxx>]

At 03:05 AM 5/14/2008, you wrote:

> All,
>
> Here is the follow up for now:
>
> One of the three  stator coil is fried.  That explain why the coils 
> are now connected
> to the ground. It is a triangle arrangement by the way. The 
> insulation has  melted on
> one core of this coil. I have two options: rewire or buy a new one.
>
> I now have to double check the regulator/rectifier. I will simulate 
> the stator w/ a transformer
> w/ a big condenser + power resistor as the load. A bulb could also be ok.
> Now I have to figure out how a bad rectifier could have fried one 
> coil. In fact as
> only one coil is out, I can only suspect one or two diodes of the 
> rectifier. I can't imagine the price
> of stator+regulator/rectifier. My bike was bought new in August 2002 
> that is 5 years and half.
> Re-wirering is probably  the best option but painful. Plus the core 
> insulator is  melted.  Epoxy
> + thin glass fiber (50 gr/m2) can probably fix that.
>
> The bike will stay a long time in the garage I think.
>
> Fred

Fred, any dc motor shop can probably rewind your stator in a pinch.
On the regulator issue I would not touch it, just replace it.
And here is why, all the diodes have been stressed and abused at this 
point. Just because only one has failed does not mean that the others 
are not going to cascade fail in another week or so.
Just replace the R&R and either get a new stator or get it rewound by 
someone that knows DC motors.



JohnS
A Dragon Ascending
"Forging my body in the Fires of my Will"

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