Seventh Semester
Branch: Electrical and Electronics Engineering
ELECTRICAL DRWES AND CONTROL (E)
Answer all questions.
Part A
Each question carries 4 marks.
1. Explain speed control methods in D.C. motor.
2. Compare fully, half controlled bridge rectifier drives.
3. Explain free wheeling with regeneration. -
4. Discuss about chopper fed drives.
5. Explain slip power recovery scheme.
6. Discuss about v/f control.
7. What is voltage source inverter? Write their applications.
8. Explain Pw-M inverter drive.
9. Explain principles of synchronous motor control.
10. Explain speed control methods in synchronous motors.
(10 x 4 = 40 marks)
Part B
Answer all questions.
Each question carries 12 marks.
11. With neat circuit diagrams and waveforms explain the operation of a single-phase half controlled rectifier control if d.c. separately excited motor. Draw the speed-torque characteristics for various values of the firing angle.
Or
12. Explain power in load and source circuits.
13. With neat circuit diagram explain the operation of 3-phase fully controlled bridge rectifier drives.
Or
14. (1) Give the principle of slip power recovery scheme.
(ii) Discuss about static Kramer’s drive.
15. Explain the following:
(i) Dual convertor, fed D.C. motor drives.
(ii) Chopper fed drives.
Or
16. Explain in detail speed control of 3-phase Induction motors and give the principle.
17. (i) What is flux weakening schemes of control.
(ii) Write applications of Induction motor drives. r
Or
18. Explain with neat diagram a current source inverter fed induction motor drives.
19. Explain in detail self controlled synchronous motor with electronic commutation.
Or
20. Explain the following:
(i) Adjustable frequency operation of synchronous motors.
(ii) Principles of synchronous motor control.
Branch: Electrical and Electronics Engineering
ELECTRICAL DRWES AND CONTROL (E)
Answer all questions.
Part A
Each question carries 4 marks.
1. Explain speed control methods in D.C. motor.
2. Compare fully, half controlled bridge rectifier drives.
3. Explain free wheeling with regeneration. -
4. Discuss about chopper fed drives.
5. Explain slip power recovery scheme.
6. Discuss about v/f control.
7. What is voltage source inverter? Write their applications.
8. Explain Pw-M inverter drive.
9. Explain principles of synchronous motor control.
10. Explain speed control methods in synchronous motors.
(10 x 4 = 40 marks)
Part B
Answer all questions.
Each question carries 12 marks.
11. With neat circuit diagrams and waveforms explain the operation of a single-phase half controlled rectifier control if d.c. separately excited motor. Draw the speed-torque characteristics for various values of the firing angle.
Or
12. Explain power in load and source circuits.
13. With neat circuit diagram explain the operation of 3-phase fully controlled bridge rectifier drives.
Or
14. (1) Give the principle of slip power recovery scheme.
(ii) Discuss about static Kramer’s drive.
15. Explain the following:
(i) Dual convertor, fed D.C. motor drives.
(ii) Chopper fed drives.
Or
16. Explain in detail speed control of 3-phase Induction motors and give the principle.
17. (i) What is flux weakening schemes of control.
(ii) Write applications of Induction motor drives. r
Or
18. Explain with neat diagram a current source inverter fed induction motor drives.
19. Explain in detail self controlled synchronous motor with electronic commutation.
Or
20. Explain the following:
(i) Adjustable frequency operation of synchronous motors.
(ii) Principles of synchronous motor control.
APRILIMAY 2009
ReplyDelete12. Explain power in load and source circuits.
Sir
would u mind sharing the explanations for this quest....?
Congrats for this venture...
but it seems to be abandoned!!