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A 440-V, 60-Hz, 6-pole, delta-connected, three-phase induction motor has the following parameters in ohms/phase:
R1 = 0.3
X1 = 0.9
R2 = 0.6
X2 = 0.9
Rc = 150
Xm = 60
If the rotational loss is 60W, and the motor runs at 0.04 slip, determine:
a) The stator current
b) The magnetization current
c) The rotor current
d) The power input
e) The stator copper loss
f) The rotor copper loss
g) The power output
h) The shaft torque and
i) The efficiency
Use Matlab to verify the above results and determine:
a. The starting torque
b. The maximum torque
c. The slip at which the motor develops maximum torque
d. Draw the torque-speed characteristic of the motor
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pecify the value for R. What is the diode current with the load connected What is the increase resulting in the output votage when the load is disconnected What change results if the load resistance is reduced to 100ohms? To 75ohms To 50ohms
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