Tanta University Faculty of EngineeringElectrical Power and Machines Engineering Department EPM3215 Electrical Machines (3) Dr. Said M. Allam

Example (1)- final exam 2010

A three-phase, 15 hp, 440-V, 60 Hz, 2-poles, Y-connected

induction motor. The friction and windage loss is 300 W and the

stator resistance between any two line terminals is 0.5 . It is

subjected to no-load and blocked rotor tests at the rated frequency.

The following data are obtained:

No-load test: 440 V, 6 A, 1200 W

Blocked-rotor test: 35 V, 16 A, 750 W

Find the parameters of the equivalent circuit and the full load efficiency.