Kurukshetra University 2009 B.Tech Electronics and Communications Engineering Electromechanical energy conversion - Question Paper

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EMEC
PAPER:ELE-201(E)

Roll No.

BT-3/D09

ELECTROMECHANICAL ENERGY COM VERSION Paper: ELE-20l(E)

Roll No.

[Maximum Marks : 100

Time ; Three Hours]

Note : Attempt five questions, selecting at least one question from each unit. All questions cany equal marks.

LJNIT-I

1. Discuss the magnetic materials generally used in electrical machines. With Lhe help of diagrams, discuss the constructional details ol' a single phase transformer. Develop its e.m.f. equation.

2. Discuss various tests required to de<erminc the equivalent circuit parameters of a transformer. .

LNIT-II

3. (a) Develop the expression for energy and force in a singly

excited magnetic Held system.

(b) With the help of neat diagram, explain the procedure to determine the magnetic characteristics of a d.c shunt machine,

4. Develop the expression for generated e.m.f. in a d.c* generator. Explain the c.m.f. build-up in a d,c. shunt gene tor

UNrr-m

5. Develop the expression lor torque for a three-phase induction motor. Draw and explain its (orque-stip chaructcri slits.

Ua

6, Explain tlic ways to control [he speed of three-phase induction motors.

UNIT-IV

7. Dime volcage regulation tor an alternator. Give its importance. List the various method?; and discuss the m.m.f method fo determine voltage regulation,

8- Discuss V-curvcs and starling of synchronous motors.

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