ELECTROMECHANICAL ENERGY
CONVERSION-I (EMEC-I)
2012
Uttarkhand Tech. university
utu previous year question papers
Total marks :100
SECTION A
Q1:- Attempt any two of the following :
- Define energy and co-energy. What is significance of co-energy? Show that the field energy in a linear magnetic system is given by Wf = 1/2Li2 = 1/2 Ψi = (1/2L)Ψ2.
- Derive an expression for the torque in the doubly excited system having salient pole type of stator as well as well as rotor. State the assumption made.
- For an electromagnetic system, show that the mechanical work done is equal to the area enclosed between two magnetization curve at open and closed position of the armature and Ψ-I locus during the armature movement.
