The phase relationship of the brushes to the armature windings account for current lag and the dynamics of the magnetic field in one direction over the other. Not much but enough to show output differences if the brushes are rotated manually to the sweet spot , then reversed in rotation. And you are correct on the brush curve dynamic, but the point of contact is found with less science, and more design trial reality. Great discussion, JimN
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Today's Featured Article - Women and Tractors - Tractor Engine Repair - by Teri Burkholder. One of the great things about working on a tractor engine with your other half is that you know what he is thinking of at all times and can anticipate his every move and his next thought of what he will do. With Ben, anyway, I can tell! He'll be busy working and I’m handing him tools and he says, "give me that..." and I’ve already got it in his hand or "hand me that....."and I’ve got the portable light right where he needed it placed to see. "Run in the house and get me a...."as I open th
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