Alternator

[Ewetea]

I recently had problems with a flat battery and traced it to abnormal readings across the alternator windings. I took the generator cover off and removed the stator. The joints between the stator windings and the three leads going to the rectifier were destroyed, presumably as a result of a flashover. I checked the windings and found that there was continuity, showing that it was still functional. However, the continuity did not occur across the wires as I would have expected. There are three pairs of wires, which I numbered as: (1,2) (3,4) (5,6). Continuity occurred between: 2-3, 4-5, 6-1. This suggests to me that the windings are connected in a "delta" formation. But the diagram in the manual indicates a star formation. Thus I would expect a tail from each pair to be connected together, with the other tails being linked to the three output wires to the rectifier. I would be obliged if any electrical bods out there could comment on this situation.

[banner001]

Firstly, have you determined that the alternator is outputting the correct amount of AC volts between the three output wires?

Should be 45V AC at 4k rpm across the three wires.

[Ewetea]

Thanks for the reply. I intend to replace it with a decent alternator so that I only install it and fill the engine with oil once to achieve a result. I was just curious at the apparent discrepancy between the manual and the item with regard to the connections of the windings.

[banner001]

ive never had a brand new reg/rec so i cant comment, but the two i have here all work perfectly fine despite the resistance readings being different from those in the manual.

its not worth the hastle trying to repair a reg/rec, check to see if the alternator is working correctly, if it is, then change the reg/rec, if with a new reg/rec the battery still wont charge (happened on tinks bike) then the wiring is at fault.