Dear students, if you are a student of Polytechnic Second Year Third Semester and you want to know what are the units in Electrical Machines 1, then you have reached the right place. In today’s post , we read detail about the Electrical Machines 1 Syllabus which is approved by BTEUP and this is the Electrical Machines 1 new syllabus .
Before we start the post one thing you were must know which is, Electrical Machines 1 is a common with Electrical branch. So let’s start the post and read about Electrical Machines 1 detailed syllabus.
DETAILED CONTENTS OF POLYTECHNIC THIRD SEMESTER ELECTRICAL MACHINES 1 FOR ELECTRICAL & ELECTRONICS ENGINEERING
1.) Introduction to Electrical Machines
1.1) Definition of motor and generator.
1.2) Torque development due to alignment of two fields and the concept of torque angle.
1.3) Electro-magnetically induced emf
1.4) Elementary concept of an electrical machine
1.5) Comparison of generator and motor
1.6) Generalized theory of electrical machines.
2.) DC Machines
2.1) Main constructional features, Types of armature winding
2.2) Function of the commutator for motoring and generation action.
2.3) Factors determining induced emf
2.4) Factors determining the electromagnetic torque
2.5) Various types of DC generators
2.6) Significance of back e.m.f., the relation between back emf and terminal voltage
2.7) Armature Reaction
2.8) Methods to improve commutation.
2.9) Performance and characteristics of different types of DC motors.
2.10) Speed control of dc shunt/series motors
2.11) Need of starter, three point dc shunt motor starter and 4 point starter
2.12) Electric Braking
2.13) Applications of DC motors
2.14) Faults in dc machines and their retrospective
2.15) Losses in a DC machines
2.16) Determination of losses by Swinburne’s Test
2.17) Rating and Specifications of DC machines.
3.) Single Phase Transformer
3.1) Introduction
3.2 Constructional features of a transformer and parts of transformer.
3.3 Working principle of a transformer.
3.4 EMF equation
3.5 Transformer on no-load and its phasor diagram.
3.6 Transformer – neglecting voltage drop in the windings – Ampere turn balance – its phasor diagram.
3.7 Mutual and leakage fluxes, leakage reactance.
3.8 Transformer on load, voltage drops and its phasor diagram.
3.9 Equivalent circuit diagram.
3.10 Relation between induced emf and terminal voltage, voltage regulation of a transformer- mathematical relation.
3.11 Losses in a transformer.
3.12 Open circuit and short circuit test. Calculation of efficiency, condition for maximum efficiency-maintenance of Transformer, scheduled Maintenance.
3.13 Auto transformer construction, working and applications.
3.14 Different types of transformers including dry type transformer.
3.15 Rating and Specifications of single phase transformer.
4.) Three Phase Transformer
4.1 Construction of three phase transformers and accessories of transformers such as Conservator, breather, Buchholtz Relay, Tap Changer (off load and on load) (Brief idea).
4.2 Types of three phase transformer i.e. delta-delta, delta-star, star-delta and star-star.
4.3 Star delta connections (relationship between phase and line voltage, phase and line current).
4.4 Conditions for parallel operation (only conditions are to be studied).
4.5 On load tap changer.
4.6 Difference between power and distribution transformer.
4.7 Cooling of transformer.
4.8 Rating and Specifications of three phase transformers.
LEARNING OUTCOMES
After studying Electrical Machines 1 subject, students will able to:
• Operate and maintain D.C. Generator
• Operate and maintain D.C. shunt, series and compound motors
• Execute speed control on D.C. Motors
• Select which type of D.C. motor suits a particular job
• Connect and use single phase transformer
• Operate auto transformers
• Conduct open CKT and short CKT tests on a single phase transformer
• Test polarity of windings of a three phase transformer and connect windings in various configurations
• Operate and maintain three phase transformers.
LIST OF PRACTICALS
1.) To measure the angular displacement of rotor of the three phase synchronous machine with respect to the stator on application of DC to the field winding and simultaneously to each phase-winding in sequence.
OR
Measurement of the angular displacement of the rotor of a slip-ring induction motor on application of DC to stator of motor winding in sequence and simultaneously to each phase of rotor winding.
2.) Speed control of DC shunt motor (i) Armature control method (ii) Field control method.
3.) Study of DC series motor with starter (to operate the motor on no load for a moment).
4.) Determine efficiency of DC motor by Swinburne’s Test at (i) rated capacity (ii) half full load.
5.) To perform open circuit and short circuit test for determining: (i) equivalent circuit (ii) the regulation and (iii) efficiency of a transformer from the data obtained from open circuit and short circuit test at full load.
6.) To find the efficiency and regulation of single phase transformer by actually loading it.
7.) Checking the polarity of the windings of a three phase transformer and connecting the windings in various configurations.
8.) Finding the voltage and current relationships of primary and secondary of a three phase transformer under balanced load in various configurations conditions such as-
(a) Star-star
(b) Star-delta
(c) Delta-star
(d) Delta – Delta configuring conditions.
INSTRUCTIONAL STRATEGY
Electrical machines being a core subject of electrical diploma curriculum, where a student will deal with various types of electrical machines which are employed in industry, power stations, domestic and commercial appliances etc. After studying this subject, an electrical diploma holder must be competent to repair and maintain these machines and give suggestions to improve their performance.
Special care has to be taken on conceptual understanding of concepts and principles in the subject.
For this purpose exposure to industry, work places, and utilization of various types of electrical machine for different applications may be emphasized. Explanation of practical aspects of the subject will make the students capable of performing various tests on the machines as per latest BIS specifications.
MEANS OF ASSESSMENT
− Assignments and quiz/class tests, mid-term and end-term written tests.
− Actual laboratory and practical work, model/prototype making, assembly and disassembly exercises and viva-voce.
RECOMMENDED BOOKS
1. Electrical Machines by SK Bhattacharya, Tata Mc Graw Hill, Education Pvt Ltd. New Delhi.
2. Electrical Machine by B.L. Thareja, S. Chand Publication, New Delhi.
3. Electrical Machines by SK Sahdev, Uneek Publications, Jalandhar.
4. Electrical Machines by Nagrath and Kothari, Tata Mc Graw Hill, New Delhi
5. Electrical Machines by JB Gupta, SK Kataria and Sons, New Delhi.
6. Electrical Machines by Smarajit Ghosh-Pearson Publishers, Delhi.
7. E-books/e-tools/relevant software to be used as recommended by AICTE/UBTE/NITTTR, Chandigarh.
Download Electrical Machine 1 Syllabus click here
Download Electrical and Electronics Engineering Materials (EEEM) Syllabus click here
Download Electrical and Electronic Instrument and Measurements (EEIM) Syllabus click here
Download Applied Mathematics 3 Syllabus click here
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