The efficiency of a properly designed synchronous motor will usually fall in range 85 to 95%.
Description : Which motor have more efficiency, synchronous motor or induction motor?
Answer : Synchronous motor has more efficiency.
Answer : Generators for peak load plants are usually designed for maximum efficiency at 50 to 75 percent full load.
Answer : The braking retardation is usually in the range 10 to 15 km phps.
Answer : D.C. generators are normally designed for maximum efficiency around full-load.
Answer : If the synchronous motor, properly synchronised to the supply is running on no load and is having negligible loss then the stator current will be zero.