[email protected] said: > A more modern name for a synchronous motor is a permanent magnet stepper > motor. Any PM stepper, and a couple of microfarad capacitor becomes a > synchronous motor when connected to the power line.
The old pre-digital way of generating a rotating field for a synchronous motor was a shaded pole. They worked well for low torque applications like clock motors. I saw plenty of them when I was a kid. The rotor was hidden in a package with the first layer of gears. I assume it was a permanent magnet but never took a package apart to verify that. Good pictures here: https://en.wikipedia.org/wiki/Shaded-pole_motor -- These are my opinions. I hate spam. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
