Hi folks, I've been a member for a while, but never posted a question, so I apologize in advance if I'm doing this wrong. I am an auto mechanic, so I don't mess around with bikes much. I have a customer's Suzuki that does not charge and I believe it must be the stator, because the three traces from the stator show 3 completely different voltage levels. Anybody have a known good waveform or any ideas before I throw a stator at it?

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Hash Cash, interesting as with out a diode you would have AC, but I am not familiar with this but wonder why we have 3 signals anyway.

Would be interested to see what you have with the rectifier hooked up.  Asume there is nothing as you said it does not charge, but would like to see it.

Would be nice if somebody else would chim in here, I only run smaller bikes KLR 650 which only have one signal coming out for charging  DC, and interesting enough the signal for coil is not rectified and is 120 volt AC, (not a misprint).

Possible the 3 signals perform different functions such as 5 volt Ref ect, (just talking here) and might not be bad as they are clean.

I would be inclined to call a Suzuki shop and get a view on this before pulling the trigger on stator unless they are cheap.

StitchB

Some motorcycles do indeed have a single phase stators. In this case its a three phase. All three phases should look identical to channel A. Looks like the other two phases have their windings shorted. Typical 3 phase winding

Wookie, thanks for your reply. It was very helpful. Another reason I thought the three traces should be the same is that all three wires going to the rectifier are identical. Three wires that they connect to on the rectifier are also identical. So that makes 6 different ways it could be hooked up. I would think if they were supposed to be hooked up a certain way, they would have color coded the wires differently.
Hash Cash

Hash Cash I took a quick look and one seems out of phase two seem low. I'll see if I can look into gettin a capture to help. No promises though.

Have a good day!

Spence

Spence wrote on Jun 25^th, 2016 at 8:06am:

Hash Cash I took a quick look and one seems out of phase two seem low. I'll see if I can look into gettin a capture to help. No promises though. Have a good day!

Spence, thanks for the input and did not see the sync thing, ( >:(hate it when that happens) but I can deal with it.

Just came off of a 1,000 mile ride, 50% in the dirt, nothing broke including bodies, does not get any better, chow.

Larry

Spence wrote on Jun 25^th, 2016 at 8:06am:

Hash Cash I took a quick look and one seems out of phase two seem low. I'll see if I can look into gettin a capture to help. No promises though. Have a good day!

Spence, thanks for the input and did not see the sync thing, ( >:(hate it when that happens) but I can deal with it.

Just came off of a 1,000 mile ride, 50% in the dirt, nothing broke including bodies, does not get any better, chow.

Larry[quote author=6F445be so but in 3 phase power we also have a wild leg (in comercial bldg) , not being an electrician this is obviously not  building power, but again would like to know the strategy as would assume could have different output depending on the wingdings, and what was their intent in the end, always trying to learn here.

Stitch

Wookie is right here. It would seem that 2 of the phases or windings are shorted.

Another way to test/confirm this would be to just use a meter and put it on the ohms setting and test each leg of the stator to ground. In other words, put one lead on one wire of the stator (with it mounted in the bike for chassis ground) and the other lead of the meter to chassis ground...if you show 0-2 ohms, you know you have a bad stator. None of the stator legs should be grounded otherwise any power generated would go right to ground instead of to the regulator.