Chapter 17: Synchronous Motor - ppt download: Electro Mechanical System Introduction The synchronous generators can operate either as generators or as motors. When operating as motors (by connecting them to a 3-phase source), they are called synchronous motors. Synchronous motors run in synchronism with the revolving field. The speed of rotation is tied to the frequency of the source. The motor speed stays constant, irrespective of the load or voltage of the 3-phase line. Synchronous motors are used not so much because they run at constant speed. They possess some unique electrical properties. Synchronous motors are rated between 150 kW (200 hp) & 15 MW ( hp) and turn at speeds ranging from 150 to 1800 r/min. These machines are mainly used in heavy industry Lecture 34 Electro Mechanical System
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