Page 709 - Basic Electrical Engineering
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+ Friction and windage loss due to rotation of the rotor
2
By subtracting the no-load I R loss from the input power, the constant losses
2
can be calculated. Note that I R loss in the rotor at no load is very small.
2
Thus, we will consider only the I R loss in the stator windings.
(a) No-load test on an induction motor
(b) Blocked-rotor test on an induction motor
Figure 8.19 Circuits for no-load and blocked-rotor tests
8.16.2 Blocked-rotor Test
