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Self-paced Beginner

Transformers

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1 enrolled

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FREE

257 min

Anytime

English

189 views

Engineering AcademyLearn Without Limits: Free Engineering Courses

Electrical Engineering

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Why enroll

Participants join this course to gain a clear and strong understanding of transformer fundamentals in simple language. It helps them understand working principles, losses, and tests, which are very important for exams and interviews. The course also improves problem-solving skills and practical knowledge used in real electrical systems.

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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 Automotive
You're a Electrical Engineering professional
You want to build skills in Engineering & Design, Project Management
You prefer self-paced learning you can revisit

You should skip if

You need a different specialisation outside Electrical Engineering
You need live interaction with an instructor

Course details

This Transformer course is designed to help learners clearly understand the fundamentals and working of transformers in a simple and easy way. It starts with an introduction and explains the basic working principle and EMF generation in transformers. The course covers construction details and different types of transformers used in practice. Learners will understand the EMF equation, ideal transformer concept, and voltage transformation ratio step by step. The behavior of transformers under load conditions is explained with winding resistance and leakage flux effects. The course gives clear knowledge of the transformer equivalent circuit for performance analysis. All types of losses such as copper, iron, stray, and dielectric losses are explained in detail. Special focus is given to iron losses, hysteresis loss, and numerical problems. Important transformer tests like open-circuit and short-circuit tests are explained with examples. Finally, the course explains transformer rating and practical performance, making it very useful for exams and real-world applications.

Source: Education 4u (Youtube Channel)

Course suitable for

Key topics covered

Basic concept of transformers
Importance and applications

Principle of mutual induction
Energy transfer mechanism
EMF generation concept
Types of induced EMF

Core construction
Winding arrangement
Insulation and cooling

Based on construction
Based on application
Based on cooling

Derivation of EMF equation
Significance of EMF equation

Definition of ideal transformer
Assumptions and characteristics

Definition of transformation ratio
Relation between voltage, current, and turns

Load conditions
Effect of load on voltage and current

Effect of winding resistance
Copper losses and voltage drop

Leakage flux concept
Impact on performance

Approximate equivalent circuit
Exact equivalent circuit

Types of losses
Effect on efficiency

Causes of copper losses
Dependence on load

Core losses
Factors affecting iron losses

Causes of stray losses
Relation to copper and iron losses

Insulation losses
Factors influencing dielectric loss

Effect of voltage and frequency
Practical significance

Hysteresis phenomenon
Numerical problems

Flux control concept
Loss behavior

Purpose of transformer testing
Types of tests

Procedure
Determination of iron losses

Procedure
Determination of copper losses

Problem-solving methods
Interpretation of results

kVA rating concept
Factors affecting transformer rating

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Course content

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

25 lectures4 hr 17 min

Transformers introduction | Machines | Lec-01
7 min
Transformers Working principle | Machines | Lec - 02
9 min
Statically induced EMF in Transformer | Types | Machines | Lec-03
11 min
Transformer Construction | Machines | Lec-04
11 min
Types of Transformers | Machines | Lec-05
9 min
Transformer EMF equation | Machines | Lec - 06
16 min
Ideal Transformer | Introduction | Machines | Lec - 07
6 min
Voltage transformation Ratio (K) | Transformers | Machines | Lec - 08
8 min
Transformer Under load | Transformers | Lec - 10
12 min
Transformer Operation with Winding resistance | Transformers | Lec - 11
14 min
Transformer Operation with Leakage flux | Transformers | Lec - 12
13 min
Transformer Equivalent Circuit | Transformers | Lec - 13
21 min
Losses in Transformer | Types | Transformers | Lec - 14
6 min
Copper losses in Transformer | Transformers | Lec - 15
13 min
Iron losses in Transformer | Transformers | Lec - 16
11 min
Stray load losses in Transformer | Copper & Iron | Transformers | Lec - 17
11 min
Dielectric losses in Transformer | Copper & Iron | Transformers | Lec - 18
9 min
Iron losses | V/ f constant | Transformers | Lec - 19
5 min
Hysteresis loss | Numerical | Transformers | Lec - 20
5 min
Iron losses | Constant flux | Transformers | Lec - 21
7 min
Transformers tests | Transformers | Lec - 22
10 min
Open Circuit Test | Transformers | Transformers | Lec - 23
14 min
Short Circuit Test On Transformers | Transformers | Lec - 24
13 min
Short Circuit Test | Examples | Transformers | Transformers | Lec - 25
8 min
Transformers Rating | Transformers | Lec - 26
8 min

Opportunities that await you!

Skills & tools you'll gain

Engineering & Design

Project Management

Research & Developmnet

Career opportunities

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Questions and Answers

Q: You're reviewing a GA drawing during a design freeze and searching 'transformer nameplate vector group Dyn11 meaning for vehicle charger homologation'. The drawing shows a three‑phase transformer symbol with delta on the HV side, star with neutral on the LV side, and a clock notation of 11. The test lab flags an earthing concern. What does Dyn11 actually imply for the LV neutral in this configuration?

A: The −30° phase shift is the trap here. Dyn11 means delta HV, star LV with neutral brought out, LV lagging HV by 30°. Delta on the primary blocks upstream zero‑sequence, but it doesn't delete the LV neutral. Earthing is a system decision, not forbidden by the vector group itself.

Q: An under‑hood auxiliary transformer is specified for a coastal market. You're googling 'transformer core corrosion mechanism high humidity automotive environment'. Ambient is 95% RH, intermittent salt spray, operating at 90°C hot‑spot. What degradation mechanism dominates for the laminated core over life?

A: 95% RH plus chloride is the boundary. Lamination edges lose coating first, so atmospheric corrosion dominates. Hydrogen embrittlement and SCC sound plausible but don't line up with silicon steel in this temperature and stress range.

Q: Final homologation fails because temperature rise is 3% over limit. You're searching 'IEC 60076 superseded standard temperature rise acceptance contract reference'. The contract cites IEC 60076‑2:2011, but the lab tested to the 2020 revision with lower allowable rise. What governs acceptance?

A: The 3% overrun hurts, but the real threshold is contractual reference. Without a dynamic clause, the cited edition is binding. IEC doesn't retroactively invalidate older editions unless regulators say so.

Q: During SAT you're checking polarity and phase rotation and googling 'transformer field polarity check before energization vehicle plant'. The LV is 400 V, HV 11 kV equivalent via test set. What’s the correct acceptance criterion before first energization?

A: Vector group is the gate. Before energization, low‑voltage injection confirms polarity and phase without stressing insulation. Ratio and IR matter, but wrong rotation can brick downstream equipment instantly.