ELEC312
Prof. L. Ben-Brahim
Fall 2022
Course-Project
The following test results are obtained from a 3φ, 100hp, 460V, eight-pole, star-connected squirrelcage induction machine.
 No-load test: 460 V, 60 Hz, 40 A, 4.2 kW
 Blocked-rotor test: 100 V, 60 Hz, 140 A, 8.0 kW
 Average dc resistance between two stator terminals is 0.152 Ω.
Develop a MATLAB program that does the followings:
Part #1:
[10]
(a) Determine the parameters of the IEEE T-Type equivalent circuit and the total rotational
loss.
(b) Draw the equivalent circuit
Part #2: Calculation of the performance of the motor
[20]
When the motor is connected to a 3, 460 V, 60 Hz supply and runs at 873 rpm, determine
(a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)
(i)
(j)
Input current
Power factor
Input power
Air gap power
Rotor copper loss
Mechanical power developed
Developed Torque
Output power
Output Torque
Efficiency of the motor
Part #3 Torque-Speed Characteristics
[40]
(a) Plot the torque-vs-speed characteristics for the following terminal voltages: [260V, 360V,
460V] when the supply frequency is kept constant at 50Hz. Display the maximum torque
values.
(b) Plot the torque-vs-speed characteristics for the following supply frequencies: [30Hz,
40Hz, 50Hz, 60Hz] when the voltage is kept constant at 460V. Display the maximum
torque values.
(c) Plot the torque-vs-speed characteristics for constant ratio of 460V/60Hz between the
supply voltages and frequencies: for frequencies (30Hz, 40Hz, 50Hz, 60Hz). Display the
maximum torque values.
(d) Conclude.
Part #4 Performance using the IEEE Γ-type equivalent circuit
[25]
Using the parameters found in Part#1, repeat Part #2 using the IEEE Γ-type equivalent
circuit, compare the results and comment.
Report: neat, typed, and free of spelling & grammar mistakes, clear & informative figures,…etc
[05]
Note: This is a group project. Each group should not exceed 3 students. The report should be typed and printed using a
Word Processing program. Don’t forget to use the standard Homework Assignment Cover Page. Please provide word
document as well as the Matlab script. Submit your Homework Assignment on Black Board. Late submissions will not
be accepted.