| Course Code | PCEEL507 | CIE Marks | 50 |
| Teaching Hours/Week (L: T:P: R) | 0:0:3:0 |
ESE Marks |
50 |
| Credits | 2 | Exam Hours | 2 Hrs. 30 Min. |
| Prerequisites (if any) | PCEET402 | Course Type | Lab |
Course Objectives:
- Provide practical experience in operation and testing of synchronous and induction machines
| Expt. No. | Experiments |
| PART A – INDUCTION MACHINES | |
|
1 |
Load test on a 3-phase squirrel-cage induction motor (CO1) Objectives:
a) Start the motor using star-delta starter / auto-transformer starter b) Determine the performance characteristics |
|
2 |
Load test on a 3-phase slip-ring induction motor (CO1)
Objectives: a) Start the motor using rotor resistance starter / auto-transformer starter b) Determine the performance characteristics |
|
3 |
No-load and blocked-rotor tests on a 3-phase squirrel-cage induction motor (CO1)
Objectives: a) Determine the equivalent circuit parameters b) Predetermine its performance at rated speed from equivalent circuit c) Predetermine its performance on full-load from circle diagram |
|
4 |
No-load and blocked-rotor tests on 3-phase pole-changing induction motor (CO1)
Objectives: a) Conduct no-load and blocked-rotor tests in two different pole configurations (example 4 pole and 8 pole) b) Predetermine its performance on full-load from circle diagrams in both cases |
| OR | |
| Load test on 3-phase pole-changing induction motor (CO1)
Objectives: a) Conduct load tests in two different pole configurations (example 4 pole and 8 pole) b) Determine the performance characteristics |
|
|
5 |
Variation of starting torque with rotor resistance in 3-phase slip-ring induction motor (CO1)
Objectives: a) Plot the variation of starting torque against rotor resistance b) Determine the external rotor resistance for which maximum starting torque is obtained |
|
6 |
Brake test on 1-phase induction motor (CO6)
Objectives: Plot the performance characteristics |
|
7 |
No-load and blocked-rotor tests on 1-phase induction motor (CO6)
Objectives: a) Determine the equivalent circuit b) Predetermine the efficiency on full-load from equivalent circuit |
|
8 |
3-phase induction machine working as motor and generator (CO2)
Objectives: Determine the performance of 3-phase induction machine working as motor and generator |
|
9 |
Speed control of 3-phase squirrel-cage induction motor using V/f technique (CO3)
Objectives: Perform the speed control of a 3-phase squirrel-cage induction motor by varying supply voltage and frequency |
| PART B –SYNCHRONOUS MACHINES | |
|
10 |
Voltage regulation of 3-phase synchronous generator by EMF and MMF method (CO4)
Objectives: a) Conduct OC and SC tests. b) Predetermine the full-load voltage regulation at different power factors. |
|
11 |
Voltage regulation of 3-phase synchronous generator by direct loading (CO4)
Objectives: a) Determine the voltage regulation at full-load or half full-load at any power factor. b) Compare the voltage regulation with emf method. |
|
12 |
Voltage regulation of 3-phase synchronous generator by Potier method (CO4)
Objectives: a) Conduct OC, SC and ZPFC tests. b) Predetermine the full-load voltage regulation at different power factors. |
|
13 |
V curves and Inverted V curves of synchronous machines (CO5)
Objectives: a) Synchronise the 3-phase alternator using dark lamp or bright lamp method b) Plot the V curves and inverted V curves of synchronous motor on no-load and half/full load. c) Plot the V curves and inverted V curves of synchronous generator on half/full load. |
|
14 |
Slip teston 3-phase salient-pole synchronous machines (CO4)
Objectives: a) Determine direct-axis and quadrature-axis synchronous reactances b) Predetermine the full-load voltage regulation at different power factors c) Predetermine the excitation and reluctance power with 120% excitation voltage and hence plot the power angle characteristics |
| NOTE: A minimum of TWELVE experiments are mandatory out of the fourteen listed. | |
Course Assessment Method (CIE: 50 marks, ESE: 50 marks)
Continuous Internal Evaluation Marks (CIE):
|
Attendance |
Preparation/Pre-Lab Work experiments, Viva and Timely
completion of Lab Reports / Record (Continuous Assessment) |
Internal Examination |
Total |
| 5 | 25 | 20 | 50 |
End Semester Examination Marks (ESE):
| Procedure/ Preparatory work/Design/
Algorithm |
Conduct of experiment/ Execution of work/ troubleshooting/ Programming | Result with valid inference/ Quality of
Output |
Viva voce |
Record |
Total |
| 10 | 15 | 10 | 10 | 5 | 50 |
- Submission of Record: Students shall be allowed for the end semester examination only upon submitting the duly certified record.
- Endorsement by External Examiner: The external examiner shall endorse the record
Course Outcomes (COs)
At the end of the course students should be able to:
| Course Outcome | Bloom’s Knowledge Level (KL) | |
| CO1 | Analyze the performance of 3-phase squirrel cage and slip ring
induction motor at different loads. |
K3 |
| CO2 | Analyze the performance of line excited induction machine working
in motoring and generating modes |
K3 |
| CO3 | Apply V/f control techniques for the speed control of 3-phase
induction motors |
K3 |
| CO4 | Determine the voltage regulation of 3-phase cylindrical rotor type and
salient pole type synchronous generators |
K3 |
| CO5 | Construct V and inverter V curves of synchronous machines at
constant load. |
K3 |
| CO6 | Compute the efficiency of single-phase induction motor at a specified
load. |
K3 |
Note: K1- Remember, K2- Understand, K3- Apply, K4- Analyse, K5- Evaluate, K6- Create
CO- PO Mapping (Mapping of Course Outcomes with Program Outcomes)
| PO1 | PO2 | PO3 | PO4 | PO5 | PO6 | PO7 | PO8 | PO9 | PO10 | PO11 | PO12 | |
| CO1 | 3 | 2 | 2 | 3 | 2 | 3 | ||||||
| CO2 | 3 | 2 | 2 | 3 | 2 | 3 | ||||||
| CO3 | 3 | 2 | 2 | 3 | 2 | 3 | ||||||
| CO4 | 3 | 2 | 2 | 3 | 2 | 3 | ||||||
| CO5 | 3 | 2 | 2 | 3 | 2 | 3 | ||||||
| CO6 | 3 | 2 | 2 | 3 | 2 | 3 |
1: Slight (Low), 2: Moderate (Medium), 3: Substantial (High), -: No Correlation
| Reference Books | ||||
| Sl. No | Title of the Book | Name of the Author/s | Name of the
Publisher |
Edition and
Year |
| 1 | Electrical
Machinery |
P.S. Bimbhra | Khanna Publishers | 7th edition 2021 |
| 2 | Electric Machines | D P Kothari & I J
Nagrath |
Tata McGraw Hill | 5th edition 2017 |
Continuous Assessment (25 Marks)
- Preparation and Pre-Lab Work (7 Marks)
- Pre-Lab Assignments: Assessment of pre-lab assignments or quizzes that test understanding of the upcoming experiment.
- Understanding of Theory: Evaluation based on students’ preparation and understanding of the theoretical background related to the experiments.
- Conduct of Experiments (7 Marks)
- Procedure and Execution: Adherence to correct procedures, accurate execution of experiments, and following safety protocols.
- Skill Proficiency: Proficiency in handling equipment, accuracy in observations, and troubleshooting skills during the experiments.
- Teamwork: Collaboration and participation in group
- Lab Reports and Record Keeping (6 Marks)
- Quality of Reports: Clarity, completeness and accuracy of lab Proper documentation of experiments, data analysis and conclusions.
- Timely Submission: Adhering to deadlines for submitting lab reports/rough record and maintaining a well-organized fair record.
- Viva Voce (5 Marks)
- Oral Examination: Ability to explain the experiment, results and underlying principles during a viva voce session.
Final Marks Averaging: The final marks for preparation, conduct of experiments, viva, and record are the average of all the specified experiments in the syllabus.
Evaluation Pattern for End Semester Examination (50 Marks)
- Procedure/Preliminary Work/Design/Algorithm (10 Marks)
- Procedure Understanding and Description: Clarity in explaining the procedure and understanding each step involved.
- Preliminary Work and Planning: Thoroughness in planning and organizing materials/equipment.
- Algorithm Development: Correctness and efficiency of the algorithm related to the
- Creativity and logic in algorithm or experimental
- Conduct of Experiment/Execution of Work/Programming (15 Marks)
- Setup and Execution: Proper setup and accurate execution of the experiment or programming
- Result with Valid Inference/Quality of Output (10 Marks)
- Accuracy of Results: Precision and correctness of the obtained
- Analysis and Interpretation: Validity of inferences drawn from the experiment or quality of program output.
- Viva Voce (10 Marks)
- Ability to explain the experiment, procedure results and answer related questions
- Proficiency in answering questions related to theoretical and practical aspects of the
- Record (5 Marks)
- Completeness, clarity, and accuracy of the lab record submitted
Curriculum
- 2 Sections
- 12 Lessons
- 10 Weeks
- Cycle 1This cycle consists of seven experiments7
- 1.1Experiment No: 1 Load test on a three phase Slip Ring Induction Motor30 Minutes
- 1.2Experiment No: 2 Starting of Three Phase Induction Motor using Star – Delta Starter
- 1.3Experiment No.3 Load Test on a Single Phase Induction Motor
- 1.4Experiment No. 4 Regulation of Three Phase Alternator by Direct Loading
- 1.5Experiment No. 5 Regulation of Three Phase Alternator by EMF and MMF Methods
- 1.6Experiment No. 6 Regulation of Three Phase Alternator by Potier Method
- 1.7Experiment No. 7 Slip Test on a three phase Salient Pole Alternator
- Cycle 2This cycle contains five experiments5
- 2.1Experiment No.8 No-load and blocked rotor tests on a three phase Squirrel Cage Induction Motor
- 2.2Experiment No. 9 Performance characteristics of a Pole Changing Induction Motor
- 2.3Experiment No. 10 No-Load and Blocked Rotor Tests on a single-phase Induction Motor
- 2.4Experimrnt No.11 Variation of starting torque with rotor resistance in Slip-Ring Induction Motors
- 2.5Experiment No.12 V and inverted V curves of a Synchronous Motor
