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Re: Can Generator be 6V OR 12V
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Posted by Indiana Jones on December 12, 2001 at 11:58:00 from (63.146.82.136):
In Reply to: Can Generator be 6V OR 12V posted by John on December 12, 2001 at 09:59:13:
A generator has 2 separate windings. The field and the armature. Think of the field as the input and armature as the output. The field on a 6 volt generator has about 2 ohms resistance. A 6 volt generator can be rewound for 12 volts. When that is done only the field winding is rewound. It is rewound with a smaller gauge wire resulting in more feet of wire and more resistance. The resistance on a rewound field should be about 4 ohms. In both cases the current flow will be about 3 amps. But getting back to your question - your generator probably has 2 wires. Unhook both. Use a volt-ohm meter and measure the resistance between the 2 posts on the generator. If you get around 2 ohms it is still wired for 6 volts. If you get around 4 ohms it has been rewired for 12 volts. If you decide to use the trial and error method, be sure to start out with a 6 volt battery. Hook up the Arm lead but leave the Field lead unhooked. Ground the field lead. If you get 7 volts or so output you have a 6 volt system. If your generator was rewired for 12 volts you should show 6 volts or less output with a 6 volt battery. In other words it will never charge up a 6 volt battery. If you hook up a 12 volt battery to a 6 volt generator it will probably be like the time your wife told you to take the baked beans out of the oven at 5 pm but you didn't remember till around 9 pm...
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