Originally posted by JohnStone
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Now that you mentioned it, I realized that I was measuring timing angles relative to the centerline of the brush. On this motor the commutator element and the brush encompasses an angle of approximately 24-deg and that's my error right there. If I look at it this way:
(The enrgizing takes place exactly in that moment when brush and commutator sement touch first time)
Thanks for showing me how to look at it!!!
@UFO,
Yes it runs slower now ~4,000rpm @ 14v input. I'm sure it will run faster at 24v but I don't see the need to go to higher speeds right now. It used to run at >10,000rpm with 7v input but it started to melt some of the brush holders so I decided to rewind with smaller wire & more turns.
Lester
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