nuckolls.bob(at)aeroelect
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 Posted: Sat May 04, 2019 9:43 am Post subject: AOG question and Shipping address for the AGM battery? |
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At 10:58 AM 5/4/2019, you wrote:
| Quote: | Hi Bob,Â
I've got a dead charging system away from home but, before I ask about that, did you receive the battery I sent? |
I did and thank you so much . . . it's
being evaluated as we speak before
letting the Battery Minder do it's
pixie-dust thing . . .
| Quote: | On to my charging system... It's a typical external regulator configuration as shown on your basic drawings. I recently repaired a broken b-lead at the alternator and, with that repair, I had to replace the regulator. The ANL looked good visually but I did not test it. It tested good after repair. Â
It worked for a 5.5 hr flight flight to Boulder City Nevada. Though there was some cycling visible on the load meter. The ANL blew on next start. Cheap voltmeter measures zero ohms from alt b+ output measured at the ship side of the b+ lead (disconnected fro the rest of the ship did wiring) I haven't pulled the alternator yet.. while I haven't confirmed there is not a short on the b+ lead I think it unlikely. Do alternator diodes fail shorted? If that happens, is my new regulator toast? I was hoping to fix it today but, sigh, I'm not sure I'll find everything I need... |
Yup, that's how they fail. The only way
an ANL should pop is if you've got TWO
or more diodes shorted. The broken b-lead
deprived the regulator of information vital
to keeping alternator output under control.
The regulator would have full-fielded the
alternator causing output to rise to many,
many volts . . . in this case, more than
the diodes could take . . . hence reverse
voltage cascade and meltdown.
Your new regulator is probably just fine.
Bob . . .
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