Rotor

—1. In a dynamo, or other machine, the part which rotates. 2. In an induction motor, the rotating part, which is usually the armature, as distinguished from the stator or fixed part. 3. In a steam turbine, a part of a machine which revolves as compared with that which remains stationary, or the stator. The term was originally applied to the revolving art of an alternating or polyphase generator, as in some dynamos the field magnets are revolved, while with others, the armature is the moving portion, and a general designation was nece ary. Since the advent of the steam turbine, the same appellation has been given to the drum or wheel, furnished with blades, which is driven by the steam.