This project describes MATLAB/Simulink implementation of three induction motor tests, namely DC, No-Load, and Blocked-Rotor tests which are performed to identify equivalent circuit parameters of an Induction Machine. These simulation models are developed to support and enhance electric machinery education at the undergraduate level.

1. TITLE
INDUCTION MOTOR TESTS
USING MATLAB/SIMULINK
Term Paper Presentation
EE – 5133
Dynamics of Power System and
Apparatus

2. Presented by:
Girish Gupta
Roll no. 15082023
Power System
M. Tech
Vivek Kumar
Roll no. 15082020
Power System
M. Tech
Presented to
Dr. M K Verma,
Associate Professor,
Department of Electrical Engineering,
IIT-BHU

3. CONTENTS
Objectives
DC Test of Induction Machine
No Load Test of Induction Machine
Blocked Rotor Test of Induction Machine
Conclusion

4. OBJECTIVE
Development of following simulation model of induction
motor test using Matlab/Simulink:-
1. DC Test
2. No Load Test
3. Blocked Rotor Test
To perform the above three tests using Simulink on a given
induction motor model and compare the results with the
parameters of the given induction motor.

5. EQUIVALENT CIRCUIT OF INDUCTION MOTOR
• R1 - Stator Resistance
• R2 - Rotor Resistance
• X1 - Stator leakage reactance
• X2 - Rotor leakage reactance
• XM - Magnetizing reactance
• Rc - Core Loss Resistance
• S= slip

6. 1. DC TEST
 The dc test is performed to compute the stator winding resistance R1.
 A dc voltage is applied to the stator windings of an induction motor.
 The resulting current flowing through the stator windings is a dc
current; thus, no voltage is induced in the rotor circuit, and the
motor reactance is zero.
 The stator resistance is the only circuit parameter limiting current
flow.

7. EXPERIMENTAL SET UP OF DC TEST

8. SIMULINK IMPLEMENTATION OF DC TEST

9. CALCULATIONS OF DC TEST PARAMETERS
• VDC = Voltmeter Reading
• IDC = Ammeter Reading
• R1 = Stator Resistance

10. ACTUAL PARAMETERS OF THE IM TAKEN IN SIMULATION

11. RESULTS OF THE DC TEST WITH ERRORS

12.  The no-load test on an induction motor is conducted to measure
the rotational losses of the motor and to determine some of its
equivalent circuit parameters.
 In this test, a rated, balanced ac voltage at a rated frequency is
applied to the stator while it is running at no load.
 During this input power, voltage, and phase currents are measured
at the no-load condition.
 For the simulation of no load, Mechanical Load torque is set to
zero in the simulation
1. NO LOAD TEST

13. EXPERIMENTAL SET UP OF NO LOAD TEST

14. SIMULINK IMPLEMENTATION OF NO LOAD TEST

15. CALCULATIONS OF NO LOAD TEST PARAMETERS
• V = Voltmeter Reading per phase
• Iφ = Ammeter Reading per phase
• P = Real Power per phase
• Qa= Reactive Power per phase
• ZNL = No load Impedance

16. ACTUAL PARAMETERS OF THE IM TAKEN IN SIMULATION

17. RESULTS OF THE NO LOAD TEST WITH ERRORS

18.  In this test, the rotor of the induction motor is blocked.
 A reduced voltage is applied to the stator terminals so that the
rated current flows through the stator windings.
 The input power, voltage and current are measured.
 The experimental setup of the blocked-rotor test is not shown
here since it is similar to that of the no-load test.
 In the Simulink model, to get the blocked rotor, the inertia of the
given induction machine is taken very high so as to keep the rotor
speed to zero.
3. BLOCKED ROTOR TEST

19. SIMULINK IMPLEMENTATION OF BLOCKED ROTOR TEST

20. ACTUAL PARAMETERS OF THE IM TAKEN IN SIMULATION

21. CALCULATIONS OF BLOCKED ROTOR TEST PARAMETERS
• Va = Voltmeter Reading per phase
• Iφ = Ammeter Reading per phase
• P = Real Power per phase
• Qa= Reactive Power per phase
• Zbr = Blocked rotor Impedance = Rbr + Xbr
• X1’ - Stator leakage reactance
• X2’ - Rotor leakage reactance

22. RESULTS OF THE BLOCKED ROTOR TEST WITH ERRORS

23. CONCLUSION
 In this paper, MATLAB simulation models of induction motor
tests are performed to obtain parameters of the per-phase
equivalent circuit of three-phase induction motors.
 Each Simulink/PSB model is explained in detail and compared
with the corresponding experimental setup.
 Circuit parameters obtained from simulation results are
compared with those obtained from hardware experiments.
 The error studies show that MATLAB paired with Simulink/PSB
is a good simulation tool to model induction motor tests and to
evaluate steady-state characteristics of the induction motor.

24. Thank You.