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This document contains 8 questions related to electrical machine modeling and analysis for an M. Tech exam. The questions cover topics like generalized machine theory, derivation of voltage equations for DC compound machines, polyphase induction machines and synchronous machines using primitive diagrams. Other questions involve obtaining matrix models for DC series motors, modeling DC compound motors in state space form, modeling induction motors with circuit diagrams and state variables, deriving voltage expressions for synchronous machines, and obtaining the dynamic model of switched reluctance motors.

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39 views1 page

WWW Manaresults Co in

This document contains 8 questions related to electrical machine modeling and analysis for an M. Tech exam. The questions cover topics like generalized machine theory, derivation of voltage equations for DC compound machines, polyphase induction machines and synchronous machines using primitive diagrams. Other questions involve obtaining matrix models for DC series motors, modeling DC compound motors in state space form, modeling induction motors with circuit diagrams and state variables, deriving voltage expressions for synchronous machines, and obtaining the dynamic model of switched reluctance motors.

Uploaded by

Raja Rj
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© © All Rights Reserved
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Subject Code: G4301/R13

M. Tech – I Semester Regular/Supplementary Examinations, April, 2015


ELECTRICAL MACHINE MODELING AND ANALYSIS
(Common to PE, P&ID, PE&ED, PE&D, EM&D)
Time: 3 Hours Max Marks: 60
Answer any FIVE questions
All questions carry EQUAL marks
****
1 a). What is generalized machine theory? What are the restrictions of generalized machine
theory?
b). Draw and describe voltage equations of the i) basic two pole machine diagram and ii)
primitive machine diagrams for the following machines. D.C compound machine, poly
phase Induction machine and synchronous machine?

2 a). Starting from fundamentals obtain the matrix form of a D.C. series motor?
b). Develop machine model for a d.c. compound motor, with the help of neat schematic
diagram and primitive diagram. Arrange the final equations in state space form?

3 a). Explain the steps involved in the computation of dc motor response under steady state?
b). Discuss how the linearization techniques are applied for small perturbations in the dc
motor?

4 In the transformation between abc and stationary dq0 prove that

5 Draw the basic circuit model for a 3-phase induction motor for stator as well as rotor and
obtain voltage equations in the form of matrices in terms of stator and rotor currents?

6 Obtain the expressions for a 3-phase induction motor (Voltage and current) in state
variable form in
i) stator reference frame and ii) synchronously rotating frame.

7 From the basic equation, derive the expression for voltages in direct axis, quadrature axis,
field current and zero sequence voltage for a synchronous machine?

8 From the basic equation, Obtain the dynamic model of switched reluctance motor?

****

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