one wire alternator

I would suggest that is how the 1 wire alternators do it (internally). Sure it will work but I'm thinking it isn't the best charging solution for our low rpm motors.
 
Yes, and unless the sensing wire connection to the battery is switched, there is a small but constant ~100 mA drain. About 2Ahr a day. Not much but could result in a flat battery if not driven much.
 
where would you put a switch for the exciter wire. in my car there is a toggle on the left side of the dash that i think is normally for dash lights but it goes from one side of the ignition switch to the other. dont exactly know what that would do any help
 
Doesn't someone sell a simple wiring harness with a diode in it that prevents the discharging problem?

I think I used one in a '36 I had years ago that was 12 volts with an alternator.

Edit : I just checked, and they were made for use on the later internally regulated alternators; it says they are "not needed" on the one-wire models.
 
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Both exciter & sensing terminals are switched by the ignition switch on my 3-wire. Dioding the sensing terminal would prevent it from sensing properly.



A 1-wire essentially has the exciter terminal disconnected and its sensing terminal directly connected to its main output terminal. Hence the small current drain. So it's super-easy to convert a 3-wire to a 1-wire simply by running a small wire from the sensing terminal directly to the main output terminal,
 
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