machines 3 -tests
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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.