Code No: RR410208

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Set No. 2

1. Give an Example for mathematical formulation of the problem.

in

IV B.Tech I Semester Examinations,MAY 2011 COMPUTER AIDED DESIGN OF ELECTRICAL MACHINES Electrical And Electronics Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? [16]

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2. (a) Write the equations for Maximum Output of a 3-Phase Induction-Motor? Write computer program in “C” for determining the same.

(b) If frequency is 50 Hz, what are the combinations of no of poles & speeds in a 3-Phase Induction-Motor? Write a computer program in “C for printing those combinations.

or

3. How do you determine the Open circuit characteristic of a 3-Phase, non-salient pole Alternator? [16] 4. (a) Derive the output equation for the armature design of a DC machine & Explain how values of “D” & “L” are determined.

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(b) Explain how Commutator & brushes of a DC machine are designed?

[8+8]

5. How do you design magnetic circuit of a Shell type Power Transformer. Explain it clearly. [16]

6. Explain how Tank for Core Type Power Transformer is designed. Write a computer algorithm for the same. [16] 7. Explain the important variables involved in design of a 3-Phase Slip-ring InductionMotor & indicate their permissible values. How do they affect optimal design?[16]

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8. Explain the important variables involved in design of a 3-Phase Salient-pole Alternator & Indicate their permissible values. How do they affect the optimal design? [16]

1

Code No: RR410208

RR

Set No. 4

in

IV B.Tech I Semester Examinations,MAY 2011 COMPUTER AIDED DESIGN OF ELECTRICAL MACHINES Electrical And Electronics Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. How do you determine the Open circuit characteristic of a 3-Phase, non-salient pole Alternator? [16]

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2. Explain the important variables involved in design of a 3-Phase Slip-ring InductionMotor & indicate their permissible values. How do they affect optimal design?[16] 3. Give an Example for mathematical formulation of the problem.

[16]

or

4. (a) Write the equations for Maximum Output of a 3-Phase Induction-Motor? Write computer program in “C” for determining the same.

(b) If frequency is 50 Hz, what are the combinations of no of poles & speeds in a 3-Phase Induction-Motor? Write a computer program in “C for printing those combinations.

uW

5. How do you design magnetic circuit of a Shell type Power Transformer. Explain it clearly. [16] 6. Explain the important variables involved in design of a 3-Phase Salient-pole Alternator & Indicate their permissible values. How do they affect the optimal design? [16] 7. Explain how Tank for Core Type Power Transformer is designed. Write a computer algorithm for the same. [16]

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8. (a) Derive the output equation for the armature design of a DC machine & Explain how values of “D” & “L” are determined. (b) Explain how Commutator & brushes of a DC machine are designed?

Aj

?????

2

[8+8]

Code No: RR410208

RR

Set No. 1

in

IV B.Tech I Semester Examinations,MAY 2011 COMPUTER AIDED DESIGN OF ELECTRICAL MACHINES Electrical And Electronics Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. Explain the important variables involved in design of a 3-Phase Slip-ring InductionMotor & indicate their permissible values. How do they affect optimal design? [16]

ld .

2. Explain the important variables involved in design of a 3-Phase Salient-pole Alternator & Indicate their permissible values. How do they affect the optimal design?[16] 3. Explain how Tank for Core Type Power Transformer is designed. Write a computer algorithm for the same. [16]

or

4. (a) Derive the output equation for the armature design of a DC machine & Explain how values of “D” & “L” are determined.

(b) Explain how Commutator & brushes of a DC machine are designed?

[8+8]

5. Give an Example for mathematical formulation of the problem.

[16]

uW

6. (a) Write the equations for Maximum Output of a 3-Phase Induction-Motor? Write computer program in “C” for determining the same. (b) If frequency is 50 Hz, what are the combinations of no of poles & speeds in a 3-Phase Induction-Motor? Write a computer program in “C for printing those combinations. 7. How do you determine the Open circuit characteristic of a 3-Phase, non-salient pole Alternator? [16]

?????

Aj

nt

8. How do you design magnetic circuit of a Shell type Power Transformer. Explain it clearly. [16]

3

Code No: RR410208

RR

Set No. 3

1. Give an Example for mathematical formulation of the problem.

in

IV B.Tech I Semester Examinations,MAY 2011 COMPUTER AIDED DESIGN OF ELECTRICAL MACHINES Electrical And Electronics Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? [16]

ld .

2. Explain how Tank for Core Type Power Transformer is designed. Write a computer algorithm for the same. [16]

3. How do you determine the Open circuit characteristic of a 3-Phase, non-salient pole Alternator? [16]

or

4. (a) Derive the output equation for the armature design of a DC machine & Explain how values of “D” & “L” are determined.

(b) Explain how Commutator & brushes of a DC machine are designed?

[8+8]

5. How do you design magnetic circuit of a Shell type Power Transformer. Explain it clearly. [16]

uW

6. Explain the important variables involved in design of a 3-Phase Salient-pole Alternator & Indicate their permissible values. How do they affect the optimal design? [16] 7. Explain the important variables involved in design of a 3-Phase Slip-ring InductionMotor & indicate their permissible values. How do they affect optimal design? [16] 8. (a) Write the equations for Maximum Output of a 3-Phase Induction-Motor? Write computer program in “C” for determining the same.

?????

Aj

nt

(b) If frequency is 50 Hz, what are the combinations of no of poles & speeds in a 3-Phase Induction-Motor? Write a computer program in “C for printing those combinations.

4