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Answer :

The efficiency of a properly designed synchronous motor will usually fall in range 85 to 95%.

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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.