II SHIFT POLYTECHNIC 

M.TECH I Year MID  –I Examinations Jan-2015, Date: 19-01-2015 AN

BRANCH/Year: PE / I Year TIME: 1 HOUR 

SUB: MACHINE MODELLING ANALYSIS MARKS: 40 M

I)  Answer all questions. Each questions carries equal marks. 4*4=16 M

1)  What is Generalized Machine Theory? What are the restrictions of Generalized Machine Theory?

2)  Obtain mathematical modelling in matrix form for a given differentially compound motor.

3)  Derive the mathematical expressions for voltage and force/torque from the fundamental principles for solenoid

with fixed armature

4)  Obtain Transfer Function of a separately excited dc motor.

II)  Answer Any 3 questions. Each questions carries equal marks. 3*8=24M 

5)  Discuss in detail about phase transformation and active transformation.

6)  Obtain basic two pole DC machine by Kron’s primitive method and find out voltage and current relations and

torque equation.

7)  A) Obtain mathematical modelling transfer function of DC shunt motor by considering armature inductance and

load torque T

B) Derive the mathematical model of cumulative compound motor in transfer function form.

8) Obtain identical transformations for currents and voltages from linear transformation (a,b,c) to phase

Transformation (α,β,0) of AC motor.

1)  A) Obtain mathematical modelling transfer function of DC series motor by considering armature inductance and

load torque T

B) Derive the mathematical model of DC series motor in state variable form.