Hi all,
I am working on a 20" box fan motor conversion.
With 6 coils, wired 3 opposite pairs in series, rectified seperately for testing.
Two pairs work just fine.
One pair does not.
I figured I had one coil backwards in that pair. No problem.
Changed it. Still didn't work. Changed it again. Still didn't work.
All 6 coils test 9 ohms. Each series pair tests 18 ohms.
The 2 that work each make 30V AC open, 1.1A AC shorted, 0.6A DC into a 1.2AH gel battery at 12.6V, maybe ~800RPMs.
The one that does not work makes 0.8V AC open. Didn't bother testing any amps.
I figure the connections are good, because the ohms are the same as the others.
If the ohms are the same, the open voltage should be the same.
The 3 pairs of coils are not shorted to each other, or the laminations.
I can see how a bad connection can show up with the amps, but not with open volts if the ohms are the same as the coil pairs that do work.
I'm more than a little frustrated on this one.
Any ideas what I am missing?
G-