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Old 18th January 2005, 12:23 AM   #11
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Is the only effect of the circulation of eddy currents flux modulation? Or is some other product of the eddy currents that causes distortion?
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Old 18th January 2005, 09:05 PM   #12
Bill F. is offline Bill F.  United States
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Hysteresis, too, if the eddy currents are flowing in ferromagnetic material.

lamination is certainly a positive thing to do if you have to put ferromagnetic material with low resistivity in the gap. However I don't believe it treats the whole problem.

In a moving VC motor, you've got two things happening: the VC field is being dragged axially through the gap creating eddy currents reciprocal to its motion (for which stacked laminations are an ounce of prevention), but you've also got circumferential currents forming in response to the current cycling in the VC.
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