Please note — cover year vs approval: BTEUP's own file for this curriculum prints "YEAR 2025-2026" on its cover, while carrying the approval line "UPDATED AND APPROVED BY BOARD OF TECHNICAL EDUCATION U.P. LUCKNOW IN C.D.C MEETING HELD ON 16.07.2026" on every page. It is filed in BTEUP's 2026-27 folder (folder2627), so it is treated here as the 2026-27 syllabus on the strength of that approval. The scheme it carries is identical, subject for subject and mark for mark, to the 2025-26 scheme.
Electric Machine-2 — What This Subject Is About
If Machine-1 was about DC machines and transformers, Machine-2 is about the AC machines that run the modern world: three-phase and single-phase induction motors, alternators, synchronous motors and special electric machines. It teaches you to maintain induction, synchronous and special electric machines used in different applications. This is the theory paper 4.2; its practical work is the separate lab subject 4.6 (Electric Machine- II (Lab)).
The five units are three-phase induction motors, single-phase induction motors, three-phase alternators, synchronous motors and special electric machines. Induction motors and alternators share the highest weightage at 25% each (10 periods each). It is a theory subject (L 3 – P 0), worth 100 marks and 3 credits, with 10 reference books.
Subject 4.2 (Theory) • Total 100 Marks • 3 Credits • L 3 – P 0 • 4th Semester — Electrical Engineering • Session 2026–27
About this document: This is the theory paper 4.2. Its practical work is the separate lab subject 4.6 (Electric Machine- II (Practical)).
What You Will Study
Unit – I: Three Phase Induction Motor (10 Periods, 25%)
Working principle: production of rotating magnetic field, Synchronous speed, rotor speed and slip; Locking of rotor and stator fields; Constructional details of 3 phase induction motors: Squirrel cage induction motor and Slip ring induction motor; Rotor quantities: frequency, induced emf, power factor at starting and running condition; Characteristics of torque versus slip (speed), Torques: starting, full load and maximum with relations among them; Relationship between rotor copper losses, slip and rotor input power (Power flow diagram); Starters: need and types; stator resistance, auto transformer, star delta, rotor resistance and soft starters; Speed control methods: stator voltage, pole changing, rotor resistance and VVVF; Motor selection for different applications as per the load torque-speed requirements; Cogging and Crawling.
Unit – II: Single phase induction motors (08 Periods, 18%)
Double field revolving theory, principle of making these motors self-start; Construction, working and Torque-speed characteristics: Resistance start induction run, capacitor start induction run, capacitor start capacitor run, shaded pole, repulsion type, series motor, universal motor, hysteresis motor; Motor selection for different applications as per the load torque-speed requirements.
Unit – III: Three phase Alternators (10 Periods, 25%)
Principle of working, moving and stationary armatures; Constructional details: parts and their functions, Windings: Single and Double layer; Equivalent circuit diagram, E.M.F. equation of an Alternator with numerical by considering short pitch factor and distribution factor; Necessary conditions of parallel operation of alternators; Armature reaction at various power factors and synchronous impedance; Voltage regulation: direct loading and synchronous impedance methods; Operation of synchronous machine as a motor.
Unit – IV: Synchronous Motors (08 Periods, 18%)
Principle of working, Torques: starting torque, running torque, pull in torque, pull out torque; Synchronous motor on load with constant excitation (numerical), effect of excitation at constant load (numerical); Concept of synchronous condenser; V-Curves and Inverted V-Curves; Hunting and Phase swinging; Methods of Starting of Synchronous Motor; Losses in synchronous motors and efficiency (no numerical); Applications areas.
Unit – V: Special Electric Machines (06 Periods, 14%)
Construction, working and applications: Linear Induction Motor, Synchronous Reluctance Motor, Switched Reluctance Motor, Permanent Magnet Synchronous Motors, stepper motors, AC and DC servomotors, Submersible motor.
Complete Syllabus
The full examination scheme, the complete practicals list and the reference books from the official syllabus. The unit-wise topics are in the "What You Will Study" section above.
Examination Scheme
| Code | Paper | Type | L – P | Credits | Internal | External | Total |
|---|---|---|---|---|---|---|---|
| 4.2 | Electric Machine- II | Theory | 3 – 0 | 3 | 40 | 60 (3 hrs) | 100 |
| Electric Machine- II (Theory) Total | 3 | 40 | 60 | 100 | |||
Units at a Glance
| Unit | Topic | Periods | Marks Share |
|---|---|---|---|
| I | Three Phase Induction Motor | 10 | 25% |
| II | Single phase induction motors | 08 | 18% |
| III | Three phase Alternators | 10 | 25% |
| IV | Synchronous Motors | 08 | 18% |
| V | Special Electric Machines | 06 | 14% |
Reference Books
As listed in the syllabus:
- P.S. Bimbhra, Electric Machines, Khanna Book Publishing Co., New Delhi (ISBN: 978-93-86173-294)
- Mittle, V.N. and Mittle, Arvind., Basic Electrical Engineering, McGraw Hill Education New Delhi, ISBN: 9780070593572
- Kothari, D. P. and Nagrath, I. J., Electrical Machines, McGraw Hill Education. New Delhi, ISBN: 9780070699670
- Bhattacharya, S. K., Electrical Machines, McGraw Hill Education, New Delhi, ISBN: 9789332902855
- Dr. T.D. Bisht, Pooja Yadav, Electrical Machine-II, Asian Publishers, Muzaffarnagar ISBN: 978-93-91541-98-9
- Theraja, B.L., Electrical Technology Vol-II (AC and DC machines), S.Chand and Co. Ltd., New Delhi, ISBN: 9788121924375
- Sen, S. K., Special Purpose Electrical Machines, Khanna Publishers, New Delhi, ISBN: 9788174091529
- Janardanan E. G, Special Electrical Machines, Prentice Hall India, New Delhi ISBN: 9788120348806
- Hughes E., Electrical Technology, ELBS
- Cotton H., Electrical Technology, ELBS
Frequently Asked Questions
How many marks is Electric Machine-2 worth in the 4th semester?
100 marks, 3 credits. It is a theory subject (L 3 – 0): internal 40, external 60 (3 hrs).
Which unit carries the most weightage in Electric Machine-2?
Three Phase Induction Motor, 25% (10 periods).
Is there any practical work in Electric Machine-2?
No — the official syllabus lists no practicals for this subject.
Which books should I read for Electric Machine-2?
10 reference books are listed in the official syllabus — the full list is in the Complete Syllabus section above.
How can I download the Electric Machine-2 syllabus PDF?
The PDF is free to download — use the download link in the Download section below. It is prepared by KAMALDNP Academy from the official BTEUP syllabus.
Is there a separate lab for this subject?
Yes — the practical work is the separate lab subject 4.6, Electric Machine- II (Lab): 15 practicals, of which you perform any 10. This post covers the theory paper 4.2 only.
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Download the Electric Machine-2 Syllabus PDF
Download the complete Electric Machine-2 syllabus PDF below — prepared by KAMALDNP Academy, with the full topic list and reference books.
Download the Electric Machine-2 Syllabus PDF
Source: BTEUP 2nd Year Electrical Engineering curriculum (folder2627). The file's cover prints "YEAR 2025-2026", but the approval line "UPDATED AND APPROVED BY BOARD OF TECHNICAL EDUCATION U.P. LUCKNOW IN C.D.C MEETING HELD ON 16.07.2026" appears on every page (95 times), and the file is treated here as the 2026-27 syllabus on the strength of that approval. Topic lists follow the official syllabus; short explanations are the author's own plain-English summaries, not syllabus text. Please confirm with your own polytechnic for any local changes.
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