A 3 phase 6 pole star connected induction machine operates from a 120 V (phase voltage) and 50 Hz supply. Given the equivalent circuit parameters shown in Table Q4, and assuming the friction and windage loss is negligible, calculate the following parameters when operating at 1200 rpm: i. The slip (%). ii. The mechanical power (W). iii. The torque (Nm). iv. The efficiency (%). V. The no load current (A).
A 3 phase 6 pole star connected induction machine operates from a 120 V (phase voltage) and 50 Hz supply. Given the equivalent circuit parameters shown in Table Q4, and assuming the friction and windage loss is negligible, calculate the following parameters when operating at 1200 rpm: i. The slip (%). ii. The mechanical power (W). iii. The torque (Nm). iv. The efficiency (%). V. The no load current (A).
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Transcribed Image Text:c) A 3 phase 6 pole star connected induction machine operates from a 120 V (phase
voltage) and 50 Hz supply. Given the equivalent circuit parameters shown in Table Q4,
and assuming the friction and windage loss is negligible, calculate the following
parameters when operating at 1200 rpm:
i. The slip (%).
ii. The mechanical power (W).
iii. The torque (Nm).
iv. The efficiency (%).
v. The no load current (A).
d) Determine the following parameters for the motor in Q4c at start-up (zero speed):
The motor phase current (A).
11. The power factor.
iii. The input supply power (W).
1.
Parameter Value
Units
XM
85
R.
250
R.
250
Ω
Xeg
R,
200
Table Q4
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