15EE41T: Transformers and Ac Motors Electrical 4th Sem Syllabus for Diploma DTE Karnataka C15 Scheme

Transformers and Ac Motors detail DTE Kar Diploma syllabus for Electrical And Electronics Engineering (EE), C15 scheme is extracted from DTE Karnataka official website and presented for diploma students. The course code (15EE41T), and for exam duration, Teaching Hr/week, Practical Hr/week, Total Marks, internal marks, theory marks, duration and credits do visit complete sem subjects post given below. The syllabus PDFs can be downloaded from official website.

For all other electrical 4th sem syllabus for diploma c15 scheme dte karnataka you can visit Electrical 4th Sem Syllabus for Diploma C15 Scheme DTE Karnataka Subjects. The detail syllabus for transformers and ac motors is as follows.

Pre-requisites:

Elements of Electrical Engineering, Electrical Circuit Theory,
DC Machines and Alternators.

Course Objectives:

To learn working principle, construction, operation and performance of Transformers, Induction Motors and Synchronous Motors.

Course Outcomes:

For complete syllabus and results, class timetable and more pls download iStudy Syllabus App. Its a light weight, easy to use, no images, no pdfs platform to make students life easier.

Unit 1 Transformers

Working principle, construction and classification-
Working principle of transformer. Classify the various types of transformers Based on construction Based on application. Explain briefly the various parts of the transformer and explain the functions of each part. Name the different insulating material used in transformer. Write the properties and uses of transformer oil. Explain the construction of core type and shell type transformers.

Emf Equation-
Derive emf equation and explain transformation ratio. Solve problem on emf equation.

Operation-
Explain the operation of a transformer onno load and on load with vector Diagrams. Solve the problem on transformer on no load.

Equivalent circuit-
Define the equivalent resistance of a transformer as refereed to primary and secondary side .Explain magnetic leakage in a transformer core. Explain leakage reactance & calculate equivalent reactance as referred to primary and secondary side. Write the formula for equivalent impedance.

1. Referred to primary.
2. Referred to secondary

Draw the equivalent circuit diagram of a transformer.

Regulation and Efficiency-
Explain the various losses in a transformer. Define voltage regulation and efficiency in the transformer. Write equation for voltage regulation and efficiency. State the condition for maximum efficiency Define all day efficiency. Solve the problems on all day efficiency. Pre-determine the Regulation and Efficiency of 1-ph transformer by conducting O.C. and S.C. tests.

Parallel operation-
Explain the necessity and conditions for parallel operation. Explain
with neat sketches parallel operation of single phase transformers with their load sharing.

Unit 2 Three- Phase transformers

Three-Phase transformers-
Explain working principle & construction of 3 phase transformers. Explain star-star, Delta-Delta, star-Delta, Delta-star, open delta and Scott connections

Cooling of transformer-
Explain the necessity of cooling of transformer. List and explain the various types of cooling of transformer. Write the meaning of AN, ON, OFA. Auto transformer-Explain briefly an auto transformer. Compare auto transformer with two winding transformer. List the application of auto transformer.

Unit 3 Induction Motors

For complete syllabus and results, class timetable and more pls download iStudy Syllabus App. Its a light weight, easy to use, no images, no pdfs platform to make students life easier.

Unit 4 Starting and Speed control of Induction Motors

Starting-
Explain the necessity of starters for 3-phase induction motors and list the various types of starters .Explain the construction and working of D.O.L. Starter, Star-Delta Starter and Auto-Transformer Starter.

Speed control-
with neat circuit diagram. Explain the speed control of 3-ph induction motor. Change of applied voltage, Change of frequency (Variable voltage and variable frequency) and Rheostat control.

Unit 5 Synchronous Motors

Working principle-
Describe the general principle of operation of synchronous motor. Compare the synchronous motor with induction motor.

Operation on load-
Explain the effect of change in excitation at constant load and V-curves Characteristics-Explain the effect of excitation on armature current & power factor. Hunting-Explain hunting and its prevention.

Starting-
Explain the methods of starting synchronous motor.

Applications-
Explain the applications of synchronous motors.

Unit-6 Single Phase Induction Motors

For complete syllabus and results, class timetable and more pls download iStudy Syllabus App. Its a light weight, easy to use, no images, no pdfs platform to make students life easier.

Reference Books:

1. Electrical Technology volume 2 -BL Theraja & A.K.Theraja S.Chand publication.
2. Principles of Electrical Machines by V.K.Mehtha.S.Chand publication.
3. Electrical machines – Theory and Practice by M.N. Bandyopadhyay PHI publication.
4. Electrical Machines by Bhattacharya. Tata McGraw Hill Co.
5. Electrical Machines – J.B.Guptha Kataria & Sons Publications.

E-Resources

1. http://www.schandgroup.com
2. http://phindia.com
3. http://ikbooks.com

Course Delivery:

The Course will be delivered through lectures, classroom interaction, animations, group discussion, exercises, assignments and Student activities.

Course Contents with Lecture Schedule:

1. Working principle of transformers. 01 Hour
2. Classification based on construction and based on application. 01 Hour
3. Various parts of the transformer and functions of each part. Different insulating material used in transformer. 01 Hour
4. Properties and uses of transformer oil. Construction of core type and shell type transformers. 01 Hour
5. Derive emf equation and explain transformation ratio (K). 01 Hour
6. problem on emf equation 01 Hour
7. problem on emf equation 01 Hour
8. Operation of a transformer on no load. Operation of a transformer on load with vector Diagrams. 01 Hour
9. Problem on transformer on no load. 01 Hour
10. Equivalent circuit of transformer 01 Hour
11. Various losses in a transformer. Voltage regulation and efficiency in the transformer. Write equation for voltage regulation and efficiency. Pre-determine the Regulation and Efficiency of 1-ph transformer by conducting O.C. and S.C. tests 01 Hour
12. State the condition for maximum efficiency. Define all day efficiency. Solve the problems on all day efficiency. 01 Hour
13. Necessity and conditions for parallel operation. 01 Hour
14. Parallel operation of single phase transformers with their load sharing. 01 Hour
15. Working principle & construction of 3 phase transformers. 01 Hour
16. Star-star, Delta-Delta, star-Delta, Delta-star, open delta and Scott connections. 01 Hour
17. Necessity of cooling of transformer and types 01 Hour
18. Explain of types cooling of transformer. 01 Hour
19. Explain of types cooling of transformer. 01 Hour
20. Briefing of an auto transformer. Compare auto transformer with two winding transformer. And application. 01 Hour
21. Working principle of induction motor. Compare with it a ransformer. 01 Hour
22. Rotating magnetic field produced by poly phase supply. 01 Hour
23. Define the terms slip, frequency of rotor current. problems 01 Hour
24. Construction of stator, squirrel cage rotor and phase wound rotor. 01 Hour
25. Derive an expression for starting torque. Explain of starting torques of squirrel cage and slip ring induction motor. 01 Hour
26. Condition for max starting torque. Effect of change in supply voltage on starting torque. 01 Hour
27. Equation for torque under running conditions. Draw torque – slip curves. 01 Hour
28. Relationship between- Full load torque and maximum torque. Starting torque and maximum torque 01 Hour
29. Equivalent circuit of an induction rotor. 01 Hour
30. Relationship between rotor power input, rotor copper loss, and Mechanical power developed and slips. 01 Hour
31. Problems on the above. 01 Hour
32. Necessity of starters and list the various types of starters . 01 Hour
33. Explain of construction and working of D.O.L. Starter 01 Hour
34. Explain of construction and working of Soft Starter. 01 Hour
35. Explain of construction and working of star-delta Starter. 01Hour
36. Speed Control of induction motor Change of applied voltage methods 01 Hour
37. Speed Control of induction motor Change of Change of poles methods 01 Hour
38. Speed Control of induction motor by Change of frequency and Rheostat control methods 01 Hour

Lesson No./ Session No. Contents Duration

39. Describe general principle of operation of synchronous motor. 01 Hour
40. Compare the synchronous motor with induction motor. 01 Hour
41. xplain the effect of change in excitation at constant load and V-curves 01 Hour
42. Explain the effect of excitation on armature current & power factor. 01 Hour
43. Effect of excitation on leading power factor. 01 Hour
44. Effect of excitation lagging and zero on power factor. 01 Hour
45. Methods of starting of synchronous motor. Hunting and its revention. Explain of applications of synchronous motors 01 Hour
46. Principle of Operation-Double revolving field theory 01 Hour
47. Resistance Split phase motor. 01 Hour
48. Capacitor Start Induction motor. 01 Hour
49. Operating principle, construction, characteristics of Single phase capacitor start capacitor run Induction Motor. 01 Hour
50. Shaded pole motor 01 Hour
51. Magnetic Levitation. 01 Hour
52. Working Principle & characteristics of Induction Generators and its applications 01 Hour

SUGGESTED STUDENT ACTIVITIES:

Each Student has to prepare and submit at least 3 pages of self hand written report (Construction details, type of windings used, Insulating materials used, cooling methods, applications etc.,) preferably by visiting a nearby Substation/ Power station/ Industry/ Factory etc., considering any one of the following topics.

1. 1-ph & 3-ph Transformers, Core type, Shell type, Step-up Transformer, Step-Down Transformer.
2. Different Cooling Methods ( any one type )
3. Transformer winding with properties of insulating materials used.
4. 1-ph and 3-ph Auto-Transformer.
5. 3-ph Induction motor- Squirrel-cage and Slip-ring type.
6. Speed control of Induction motor.
7. Types of Starters.
8. 3-ph Synchronous Motors.
9. 1-ph Induction motors and Linear Induction Motors.
10. Magnetic Levitation.
11. Induction Generators.

Model Question Paper:

(CIE)

1. Write a short note on All day efficiency of the transformer.
2. Explain the principle of operation of transformer.

OR A single phase 50 Hz transformer has 100 turns on the primary and 400 turns on the secondary winding. The net cross- sectional area of core is 250 cm2 . If the primary winding is connected to a 230 V 50Hz supply, determine

1. The EMF induced in the secondary winding
2. The maximum value of flux density in the core.
3. Explain the construction of 3 phase transformers
4. Explain Necessity of cooling of transformer and types

OR Discuss Parallel operation of single phase transformers with their load sharing.

Model Question Paper:

PART-A

1. How the iron losses are minimized?
2. Explain the working principle of transformer.
3. What are the advantages of 3-phase transformers over 1-phase transformers?
4. Arrange the connections for 3-phase transformers for the following i)Star-star ii)Delta-star
5. Explain the principle of operation of a three-phase induction motor.
6. Explain how torque is produced in the rotor of an induction motor?
7. Explain the necessity of starter in Induction motor.
8. Describe the general principle of operation of synchronous motor.
9. State applications capacitor start 1-phase IM.

PART -B

1. Derive the emf equation of single phase transformer. 5
2. A single phase 50 Hz transformer has 100 turns on the primary and 400 turns on the secondary winding. The net cross-sectional area of core is 250 cm2 . If the primary winding is connected to a 230 V 50 Hz supply, determine
3. The EMF induced in the secondary winding ii. The maximum value of flux density in the core. 5
1. Draw and explain phasor diagram of transformer on lagging load. 6
2. What are the conditions required for the parallel operation of two 1-phases Transformers. 4
1. Arrange the connections for 3-phase transformers for the following
1. Delta-delta
2. Star-delta
3. Scot-connection 6
2. Give the comparison between 3-phae and 1- phase transformers. 4
1. Explain why an induction machine is called a generalized transformer. 6
2. Explain how torque is produced in the rotor of an induction motor? 4
1. Explain with neat sketch the construction of slip ring induction motor. 6
2. Derive condition of maximum torque developed in a 3-phase induction motor. 4
1. Explain with neat sketch the construction and working of DOL starter. 6
2. Explain with neat sketch the construction and working of star delta starter. 4
1. Explain speed control of 3-phase slip ring induction motor by rheostat control .6
2. Explain the effect of change in excitation at constant load. 4
1. Explain with neat sketches the effect of excitation on armature current. 6
2. Compare Synchronous motor with Induction motor 5
1. State the characteristics of permanent magnet synchronous motor. 4
2. Explain construction, principle of operation, Single phase Capacitors start I.M. 6
1. Explain the principle of working & characteristics of linear induction motor.6
2. Explain Magnetic Levitation. 4

For detail syllabus of all other subjects of BE Electrical, C15 scheme do visit Electrical 4th Sem syllabus for C15 scheme.

Dont forget to download iStudy Syllabus App for latest syllabus and results, class timetable and more.