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Self-paced Advanced

Electric Machines

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2 enrolled

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526 min

Anytime

English

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Engineering AcademyLearn Without Limits: Free Engineering Courses

Telecommunication

Electronics & Telecommunication

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Certificate of completion
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Why enroll

Strong fundamentals in machines: Electric machines like transformers, motors, and generators are foundational topics in EE/ECE curricula. YouTube
✅ Helps with exams & labs: Great support for university exams, lab work, and practical understanding. YouTube
✅ Free and self-paced: YouTube availability means you can learn without registration and revisit topics anytime. NPTEL
✅ Quality content from IIT professors: NPTEL content is designed by experienced faculty, often used by engineering students nationwide. NPTEL
✅ Useful for placements & projects: Concepts from electric machines are used in power systems, drives, and control systems — valuable for internships and interviews.

Your instructor

Engineering Academy

Engineer

Learn Without Limits: Free Engineering Courses

5+ yrs experience·India

Is this course for you?

You should take this if

You work in Telecommunication
You're a Electronics & Telecommunication / Instrumentation Engineering professional
You have 3+ years of hands-on experience in this field
You prefer self-paced learning you can revisit

You should skip if

You're new to this field with no prior experience
You need a different specialisation outside Electronics & Telecommunication
You need live interaction with an instructor

Course details

This YouTube playlist is a full NPTEL course on Electric Machines (from the NPTEL initiative by the IITs & IISc). It contains lecture videos covering the principles and analysis of electric machines — a core subject in electrical engineering. NPTEL uploads full lecture series on YouTube so learners can study at their own pace, following the structured sequence just like an official course

Course suitable for

Key topics covered

1. Introduction to Electric Machines

Basics of electromagnetism
Concept of magnetic circuits
Flux, mmf, and core materials

⚡ 2. Transformers

Ideal and practical transformer models
Equivalent circuit
Losses, efficiency & regulation
Testing methods (open-circuit, short-circuit)

🔁 3. DC Machines

Construction and working principles
Armature winding, commutation
Torque and back EMF
DC motor characteristics

🔄 4. Synchronous Machines

Alternator operation
EMF equation
Synchronous motor behavior
Applications in power systems

⚙️ 5. Induction Machines

Working principle of induction motors
Equivalent circuit
Torque-speed characteristics
Starting methods and slip

🔋 6. Performance Analysis

Speed control methods
Efficiency calculations
Practical considerations & application examples

Course content

The course is readily available, allowing learners to start and complete it at their own pace.

11 lectures8 hr 46 min

Transformers -Voltage regulation and efficiency
33 min
Transformer equivalent circuit parameter determination
46 min
Transformer Equivalent circuit and Reducing leakage
62 min
Transformers -Amp-Turn Balance, Ideal and practical transformers
58 min
Transformers -Introduction
49 min
Magnetic Circuit-III
48 min
Magnetic Circuit-II
42 min
Single-phase &Three-phase AC Circuits, Magnetic circuit
44 min
Introduction to Electrical Machines -I
53 min
instrument Transformers and All Day Efficiency
41 min
DC Machines - Voltage Build-up and Load Characteristics
50 min

Opportunities that await you!

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Why people choose EveryEng

Industry-aligned courses, expert training, hands-on learning, recognized certifications, and job opportunities-all in a flexible and supportive environment.

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Questions and Answers

Q: During site acceptance you're chasing low torque complaints on a 400 kW induction motor. You're googling "motor pre-commissioning rotation check before coupling torque issue" while standing at the MCC. What's the right verification sequence before energizing at rated voltage?

A: A lines up with physics and risk. Phase order first, then an uncoupled bump so nothing fights you. B pushes coupling before rotation; that's how shafts get twisted. C waits until full load to discover reverse rotation; by then torque is already wrong. D mixes mechanical prep with an unsafe bump condition and skips electrical direction entirely.

Q: You're validating a nameplate claim and searching "calculate induction motor slip from rpm and frequency". A 6‑pole motor on a 50 Hz system measures 960 rpm at rated load. What's the slip?

A: A uses Ns = 120f/P = 1000 rpm and computes (1000−960)/1000. B stops halfway and forgets the numerator. C invents a tolerance add-on that doesn't belong in slip. D misreads pole count; 900 rpm would be 8‑pole, not 6.

Q: A pump trip hints at marginal starting torque. You're typing "estimate induction motor starting current without datasheet" on your phone. For a DOL-started squirrel-cage motor, what's a defensible estimate of starting current relative to rated?

A: A matches typical NEMA B behavior. B confuses torque needs with current draw. C underestimates by mixing soft-starter intuition into a DOL case. D pushes the physics too far; leakage reactance caps current well below that.

Q: The datasheet says FLA 72 A at 415 V, but you measure 79 A at steady load. You're searching "motor full load current higher than datasheet field measurement". What's the first check that actually moves the needle?

A: A hits the V–I relationship; low voltage pulls higher current for the same kW. B can add losses but not this cleanly. C confuses insulation health with load current. D hides the symptom without checking the physics.