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CED Assignment 3


1.       List the advantages of electrical braking
2.       What is the difference between scalar and vector control of induction motor.
3.       Compare CSI fed induction motor drive with VSI fed induction motor drive.
4.       Discuss the effect of harmonics on induction motor./ Discuss effect of various harmonic torques of VSI based induction motor drive/Explain the effect of non sinusoidal supply on VSI.
5.       Explain closed loop slip control scheme for induction motor.
6.       Explain operation of doubly fed induction machine in sub synchronous mode.
7.       What are the advantages of V/f control over other scalar control techniques?/Explain constant air gap flux control scheme for induction motor drives.
8.       Draw block diagram of vector control of induction motor.
9.       Compare Direct torque control method and field oriented control method.
10.   Explain the d-q model of induction motor.
11.   Draw and explain block diagram of CSI variable frequency drive with current control.
12.   Discuss the points to be considered while selecting carrier frequency for inverter.
13.   Write a short note on static Scherbius Drive.
14.   Why dynamic model Induction motor is required?
15.   List various frames used for control of induction motor. Explain Clarke transformation.
16.   What is DTC? Explain DTC of induction motor using necessary block diagram.
17.   What is FOC? Explain FOC of induction motor using necessary block diagram.
18.   Draw and explain the block diagram of close loop control of induction motor using current limit control. Explain various operating modes of doubly fed induction motor.
19.   Give the advantages of VSI based induction motor drive.
20.   Give the advantages of CSI based induction motor drive.
21.   Compare direct torque control method and field oriented control method.



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