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SCR controlled bilge pump
Lynn Coffelt wrote:
Actually, most (maybe all) DC, conventionally commutated motors have brushes wide enough, and commutator segment spacing narrow enough that that they work, as some say, "make before break". Otherwise, there would be many rotor positions where the motor would not start. (we all have experienced that with burned commutators, no?) Good point. I think the earliest of the DC motors were electrically noisy, to the point that early stereos had trouble. Doing it the way you say would reduce the RFI. |
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