When powering AC motors, the electrical supply can be at full power to run at full speed or at variable power to run at variable speed. Applications with varying loads benefit from the variable speed ...

In 1960, the large-angle type PM step motor was the most used step motor. This two-phase, bifilar wound PM step motor (top) advanced 45° mechanical with each pulse from the drive, while by 1962 PM ...

Blind calculation of horsepower for positioning motors can yield values that seem nonsensical to the uninitiated. It's common to see manufacturers of ac motors publish horsepower ratings for their ...