slip ring motor have high starting torque compare to squirrel cage motor and have good speed control also have high over loading capacity, smooth acceleration under heavy loads.
interpoles is widely use to improve commutation place between main poles fitted to yoke functions: to neutralize armature mmf in commutating zone to produce some flux in commutating zone
all day efficiency is ratio of energy output to the energy input taken over 24 hour period. design distribution transformer for max. efficiency occurring at the avarage output power. performance of distribution transformer represent by all day efficiency.
EXAMIANS