" MOTCO " make Synchronous Motors are constant speed machines i.e running at its synchronous speed.
Synchronous motors are capable of being operated under a wide range of power factors, both lagging and leading. Hence, it can be used for power factor correction purposes, in addition to supplying torque to driven loads.
DC motors requires a basic understanding of the design and operating characteristics of the various types available: the series motor, the shunt motor, and the compound motor. Each type has unique operating characteristics and applications.