Editing Synchronous motor (section)

===Other===
Synchronous motors are especially useful in applications requiring precise speed or position control:
* Speed is independent of the load over the operating range of the motor.
* Speed and position may be accurately controlled using open loop controls (e.g. [[stepper motors]]).
* Low-power applications include positioning machines, where high precision is required, and [[robot]] actuators.
* They will hold their position when a DC current is applied to both the stator and the rotor windings.
* A clock driven by a synchronous motor is in principle as accurate as the line frequency of its power source. (Although small frequency drifts will occur over any given several hours, grid operators actively adjust line frequency in later periods to compensate, thereby keeping motor-driven clocks accurate; see ''{{section link|Utility frequency|Stability}}''.)
* [[Phonograph#Turntable technology|Record player turntables]]
* Increased efficiency<!--relative to what?--> in low-speed applications (e.g. [[ball mill]]s).