JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
EE407ES: ELECTRICAL MACHINES LAB – II
B.Tech II Year II Semester (R16)
Prerequisite
Electrical Machines – I & Electrical Machines - II
Course Objectives:
To understand the operation of synchronous machines
To understand the analysis of power angle curve of a synchronous machine
To understand the equivalent circuit of a single phase transformer and single phase induction motor
To understand the circle diagram of an induction motor by conducting a blocked rotor test.
Course Outcomes
After the completion of this laboratory course, the student will be able
Assess the performance of different machines using different testing methods
To convert the Phase from three phase to two phase and vice versa
Compensate the changes in terminal voltages of synchronous generator after estimating the change by different methods
Control the active and reactive power flows in synchronous machines
Start different machines and control the speed and power factor The following experiments are required to be conducted as compulsory experiments
1. O.C. & S.C. Tests on Single phase Transformer
2. Sumpner’s test on a pair of single phase transformers
3. No-load & Blocked rotor tests on three phase Induction motor
4. Regulation of a three –phase alternator by synchronous impedance &m.m.f. methods
5. V and Inverted V curves of a three—phase synchronous motor.
6. Equivalent Circuit of a single phase induction motor
7. Determination of Xd and Xq of a salient pole synchronous machine
8. Load test on three phase Induction Motor In addition to the above experiments, at least any two of the following experiments are required to be conducted from the following list
1. Separation of core losses of a single phase transformer
2. Efficiency of a three-phase alternator
3. Parallel operation of Single phase Transformers
4. Regulation of three-phase alternator by Z.P.F. and A.S.A methods
5. Heat run test on a bank of 3 Nos. of single phase Delta connected transformers
6. Measurement of sequence impedance of a three-phase alternator.