XPost: sci.electronics.design, sci.electronics.equipment, sci.electronics.misc
XPost: sci.electronics.repair
From: martin_rid@verizon.net
On Mon, 16 Feb 2015 06:01:09 -0800, Sparky wrote:
>Last year the alternator on my Toyota cooked the stator windings. I didnıt
>look any further and replaced it with a rebuilt alternator & regulator from
>the local parts supplier.
>
>Now (7 or 8 months later) the replacement has failed in the same mode. Iım
>suspicious. Also confused:
>
>If a diode opens there wouldnıt be an increased load on the stator windings.
>If a diode shorts, there also wouldnıt be any increase, just a decrease in DC
>output voltage.
>
>If the alternator output is shorted, since itıs connected directly to the
>battery (+) terminal, this would result in smoke and fire, at least a burnt
>fusible link. None of this has occurred. (Well, the windings are discolored
>and the smell is what clued me in to these problems.) When I put in a
>replacement alternator Iım quite confident everything will look just fine.
>Until next time.
>
>What could cause these symptoms? Twice?
>
>Thanks!
Does the alternator use Avalanche Diodes? A bad battery wiring
connection will cause a diode to short. I'd check the terminals and
crimps.
BTW I had this problem with the double GM battery lugs, they used a
lead spacer that shrunk when it thermal cycled.
\Cheers
--- SoupGate-Win32 v1.05
* Origin: you cannot sedate... all the things you hate (1:229/2)
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