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Pozdrav,naime imam problem sa alternatorom prvi mi je izgoreo skroz,prvo sam mislio zato sto mi je cureo antifriz na neko crevo sto je blizu alternatora pa ga je izgoreo,medjutim narucio sam od coveka drugi polovan namontirao ga i posle 2 dana je opet stator izgoreo,skinem odnesem namotam novi stator danas montirano auto je bukvalno radio 15 sekundi i opet je namotaj izgoreo,Akumulator je proveren,u pitanju je Audi a7 2012 godiste.Ne znam vise sta da radim i gde da vozim.Regler i Cetkice i stator su provereni.
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negde ti mozda probija na masu,pravi veliku struju na statoru i stator izgori.
da se izmere otpornosti na zicama koje dolaze na alternator.
"lectric generators and motors are dumb, they do what is asked of them until their protective devices trip, or they burn up because they don't have a protective device....as in the case of your alternator.
Your alternator has failed twice, and is going to fail again if you don't fix it.....
If I was a betting man, I would say that you have a ground on the 12 VDC output between the output of the alternator and before the load panels (i.e. the fuses and circuit breakers). Therefore, it's unprotected.
You say the voltage drops as you come off idle....maybe that's because the alternator has the ability to produce much more current at increased RPM's, which causes voltage drop, hence the lowering voltage.
As I said, I don't think it's the alternator, I think it's a fault in the wiring.
Do this: Using a multimeter selected to the OHMS scale, disconnect the main power wire off the back of the alternator. Take a resistance reading from that wire to the casing of the alternator/ground. This should be at least 1,000 ohms (hopefully over 2,000 ohms).
If it's causing a ground loop, it will be at something in the range of 1-100 ohms, which is not good.
Have your mechanic do the resistance check of the main power lead attached to the alternator to ground.
Most likely, you have a wire that rubbed up against something too long and wore through the insulation and is making a connection to ground, overloading the alternator and causing it to fail within weeks.
If this is true, this happened first a couple months ago....then continued to happen when you replaced the alternator.
Do you know what voltage levels the alternator is putting out at idle and during increased RPM's? That would help.
Don't feel bad, most mechanics are terrible electrical troubleshooters. "
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