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AC Stepper Motor Drive
What goes with AC stepper drive, a stepper AC motor?

I have a chinese Stepper drive DM860H which has a AC power supply from 20-60VAC. How is it possible? my question is is there any AC stepper Motors?

It's a while since I've dealt with servo control. You can have AC Servomotors but only seen DC Stepper Drives.

I recall an ABB system with phase locked AC motors - slave motor phase locked to a master but the slave could not rotate stepwise.