Re: Re: 6v generator to 12v generator

Posted by Dave on January 24, 2003 at 07:38:27 from (138.29.36.228):

In Reply to: Re: 6v generator to 12v generator posted by Bob M on January 23, 2003 at 19:10:31:

Bob: Good point on doubling the field current, but I have a couple engineer-to-engineer questions.

First, what is the 'weak link' in the generator? I know (now) that my 6-volt gen is running double current in the field windings, but I am also running only half current in my armature (this was the reason I considered it safe and went ahead and did it). Shouldn't this help me out? I guess it would be best to run both sets of winding below their design amperage, but I was wondering how sensitive the field actually is to over-current, especially when my armature is only making one-quarter the heat than it would if run at 6 volts. Also, the exterior field windings seem more likely to shed the extra heat. I agree this is not optimal but was also wondering how different the 12-volt field windings are from the 6-volt (wire guage, number of turns, etc).

Also, do you know what the typical rated field current is for these type generators? I guess I could go out and measure the ohms of the field and divide it into 6 (or 12), but that would not tell me what my field is rated to take. I guess I should be somewhat cautious since I think my generator is oiginal and the insulation isn't the greatest. But I was just wondering how cautious I should be. For the wndings, I would take it that the field would be the 'safer' of the two to run over-current (no brushes, etc.) I was just curious if you knew how much.

Thanks for your insightful, technical remarks. I learned something!

Dave

Follow Ups:

• Re: Re: Re: 6v generator to 12v generator Bob M 11:40:11 01/24/03 (0)

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