Re: [CAD_CAM_EDM_DRO] Re: Synchronous vs stepper

Mariss Freimanis wrote:

>
> Hi, A 200 step motor (1.8 deg) can be run directly from a 50 or 60 Hz
> supply. What is needed is a capacitor in series with one winding to
> phase shift the AC 90 deg relative to the other winding. At 50 Hz
> this gives 60 RPM and at 60 Hz it gives 72 RPM. Step motors intended
> for 115 VAC operation have a high inductance to limit phase current
> to the correct value at 50 / 60 Hz.

60 cycle 115 VAC produces high inductance in the windings of a motor.

John Grant