Synchronous Motor DefinitionSynchronous motors are defined as constant speed motors that run at the synchronous speed of the supply. They are typically used for constant speed operations and to improve the power factor under no load conditions. Synchronous motors also have fewer losses compared to induction motors of the same rating.The speed of a synchronous motor is given byWhere, f = supply frequency and p = number of poles.The synchronous speed depends on the supply frequency and the number