model lab qp

1. MODEL EXAMINATION (2015-16 ODD SEM)
EE 6512 Electrical Machines Laboratory II
Time: 3 Hours Maximum Marks: 100
1. Conduct necessary tests on a three phase alternator and hence predetermine the power
factor at which the regulation is zero. Use synchronous impedance method.
2. By conducting suitable tests on a three phase alternator, predetermine the regulation at
unity p.f. using POTIER and ASA method.
3. Determine the direct axis and quadrature axis synchronous reactances of a three phase
salient pole alternator by conducting suitable experiment. Also predetermine the voltage
regulation at 0, 0.2, 0.4, 0.6, 0.8, unity power factor leading.
4. Determine the negative and zero sequence impedances of an alternator by conducting
suitable experiment.
5. Plot the V curves and inverted V curves when synchronous machine is at no load and
constant power by conducting suitable experiment.
6. By suitable experiment, properly synchronize a three phase synchronous motor to the
supply mains using lamp method. Also plot the armature current and power factor against
the field current.
7. By conducting suitable test on the given three phase induction motor, determine the
torque & efficiency at 3/4th full load.
8. By conducting suitable test on the given three phase induction motor, determine the
torque & efficiency at 3/4th full load.
9. Determine the equivalent circuit parameters of a three phase induction motor by
performing no load test and blocked rotor test. Also predetermine its performance
parameters from the circle diagram for full load condition.
10. Predetermine the performance parameters of a three phase induction motor from the
circle diagram for half load condition by performing no load test and blocked rotor test.
11. Determine the iron loss and mechanical loss of a three phase induction motor by
conducting suitable experiment.
12. Separate the no load losses of a three phase induction motor in to its constituent parts by
conducting suitable experiment.
13. By conducting suitable test on the given single phase induction motor, determine the
torque, slip&efficiency at 3/4th full load.
14. Determine the equivalent circuit parameters of a single phase induction motor by
performing no load test and blocked rotor test. Also predetermine its operating
parameters from the equivalent circuit at rated speed.
15. Predetermine the operating parameters of a single phase induction motor from the
equivalent circuit at rated speed by performing suitable experiment.