3EE10 ELECTRICAL MACHINES LAB-I

1  Speed control of D.C. shunt motor by (a) Field current control method & plot the curve for speed

vs field current. (b) Armature voltage control method & plot the curve for speed vs armature

voltage.

2  Speed control of a D.C. Motor by Ward Leonard method and to plot the curve for speed vs

applied armature voltage.

3  To determine the efficiency of D.C. Shunt motor by loss summation (Swinburne’s) method.

4  To determine the efficiency of two identical D.C. Machine by Hopkinson’s regenerative test.

5  To perform O.C. and S.C. test on a 1-phase transformer and to determine the parameters of its

equivalent circuit its voltage regulation and efficiency.

6  To perform back-to-back test on two identical 1-phase transformers and find their efficiency &

parameters of the equivalent circuit.

7  To perform parallel operation of two 1-phase transformers and determine their load sharing.

8  To determine the efficiency and voltage regulation of a single-phase transformer by direct

loading.

9  To perform OC & SC test on a 3-phase transformer & find its efficiency and parameters of its

equivalent circuit.

10  To perform parallel operation of two 3-phase transformers and determine their load sharing.

11  To study the performance of 3-phase transformer for its various connections, i.e. star/star

star/delta delta/star and delta/delta and find the magnitude of 3