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I am Ahmed Mahdy an electrical power engineer, researcher, and the founder of Khadija Academy. I am also an electrical bestselling instructor teaching electrical power engineering. I have helped over 80,000 students from 198 countries achieve career success with simple and easy courses in the last 8 years.​ In addition, I have a YouTube educational engineering channel called" Khadija Academy", where I regularly post videos related to electrical engineering. I have received the award for the be
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Get Started with All Access PassBuy Only This CourseAbout This Course
Who this course is for:
- Students or professionals looking to understand magnetic circuits from the ground up
- Anyone seeking a strong foundation in electrical transformers and their real-world applications
- Learners with basic electric circuit knowledge who want to advance into more complex electrical machines
What you’ll learn:
- Core concepts of magnetic circuits
- Fundamental and advanced principles of electrical transformers
- Types and configurations of transformers, including single-phase and three-phase systems
- Practical transformer components and their functions
- Real-world applications, supported by solved examples and step-by-step guidance
Requirements:
- A basic understanding of electric circuit fundamentals is recommended
- Completion of our Electric Circuits course is ideal for grasping circuit analysis more effectively
Build A Strong Foundation in Electrical Machines With This Practical Guide!
This course provides a clear, practical introduction to the essential building blocks of electrical machines, with a focus on magnetic circuits & electrical transformers. It’s designed to help you confidently transition from theoretical understanding to practical application.
Through structured lessons, hands-on examples, and problem-solving exercises, you’ll learn to analyze, design, and troubleshoot critical components used in modern electrical systems.
Magnetic Circuits
We begin with the foundations of magnetic circuits, exploring how magnetic fields behave in different materials and how circuits are designed to direct this flow efficiently.
You’ll explore:
- Permeability – how easily a material becomes magnetized
- Magnetic intensity – the force driving magnetization
- Reluctance – resistance to magnetic flux
- Phenomena like the fringing effect, where magnetic fields spread at circuit edges
- Graphical tools like magnetization curves and hysteresis loops, which help visualize material behavior and energy losses
Electrical Transformers
Next, we turn to electrical transformers, starting from the basics and moving toward advanced analysis and design.
You’ll learn to:
- Distinguish between ideal and real transformer models using phasor diagrams and EMF equations
- Understand winding polarity and how to reflect impedances between primary and secondary sides
- Perform essential transformer tests, including open-circuit and short-circuit tests to measure losses
You’ll also explore:
- Transformer types: autotransformers, three-phase transformers, and their real-world uses
- Construction methods: core-type vs. shell-type
- Three-phase connection codes (e.g., Dyn11, YNd11) and how to interpret them
- Key components: windings, insulation, and cooling systems (oil or air-based)
- Critical protection devices: Buchholz relays and tap changers for voltage regulation
Each topic is explained through step-by-step lessons and detailed solved examples, helping you apply what you learn to real engineering scenarios.
Start Now With My Courses And Build Your Engineering Skills!
Our Promise to You
By the end of this course, you will have learned about Electrical Machines For Electrical Engineering Part I.
10 Day Money Back Guarantee. If you are unsatisfied for any reason, simply contact us and we’ll give you a full refund. No questions asked.Â
Keep Learning and Head to Our Blog Posts For More Actionable Tips and Advanced Strategies!
Course Curriculum
| Section 1 - Course Content | |||
| Course Content | 00:00:00 | ||
| Section 2 - Magnetic Circuits | |||
| Magnetic Flux, Flux Density, And MMF | 00:00:00 | ||
| Magnetic Permeability, Magnetic Intensity, And Reluctance | 00:00:00 | ||
| Solved Example 1 | 00:00:00 | ||
| Solved Example 2 | 00:00:00 | ||
| Fringing Effect In Magnetic Circuits | 00:00:00 | ||
| Representation Of A Magnetic Circuit | 00:00:00 | ||
| Solved Example 3 | 00:00:00 | ||
| Solved Example 4 | 00:00:00 | ||
| Magnetization Curve And Hysteresis Loop | 00:00:00 | ||
| Solved Example 5 | 00:00:00 | ||
| Inductance And Flux Linkage | 00:00:00 | ||
| Course PDF Slides And Files | 00:00:00 | ||
| Section 3 - Basics Of Transformers | |||
| Introduction To Electrical Transformers | 00:00:00 | ||
| Construction And Operation Of A Single Phase Transformer | 00:00:00 | ||
| Ideal Transformer | 00:00:00 | ||
| Phasor Diagram Of An Ideal Transformer | 00:00:00 | ||
| E.M.F Equation Of A Transformer | 00:00:00 | ||
| Polarity Of Transformer Windings | 00:00:00 | ||
| Solved Questions | 00:00:00 | ||
| Solved Examples On Ideal Transformer | 00:00:00 | ||
| Shifting Impedances In A Transformer | 00:00:00 | ||
| Example On Shifting Impedances | 00:00:00 | ||
| Transformer Losses | 00:00:00 | ||
| Practical Transformer And Exact Equivalent Circuit | 00:00:00 | ||
| Approximate Equivalent Circuit | 00:00:00 | ||
| Phasor Diagram Of A Practical Transformer At No Load | 00:00:00 | ||
| Phasor Diagram Of A Practical Transformer At Inductive Load | 00:00:00 | ||
| Solved Example 1 On Practical Transformers | 00:00:00 | ||
| Solved Example 2 On Practical Transformers | 00:00:00 | ||
| Solved Example 3 On Practical Transformers | 00:00:00 | ||
| Solved Example 4 On Practical Transformers | 00:00:00 | ||
| Transformer Voltage Regulation | 00:00:00 | ||
| Transformer Efficiency | 00:00:00 | ||
| Notes About Transformers | 00:00:00 | ||
| Solved Example On Transformer Efficiency | 00:00:00 | ||
| Open Circuit Test | 00:00:00 | ||
| Short Circuit Test | 00:00:00 | ||
| Solved Example On Transformer Parameters | 00:00:00 | ||
| Autotransformer | 00:00:00 | ||
| Solved Example 1 On Autotransformer | 00:00:00 | ||
| Solved Example 2 On Autotransformer | 00:00:00 | ||
| Solved Example 3 On Autotransformer | 00:00:00 | ||
| Core Type Transformers | 00:00:00 | ||
| Shell Type Transformers | 00:00:00 | ||
| Comparison Between Shell And Core Type Transformers | 00:00:00 | ||
| Transformers | 00:00:00 | ||
| Section 4 - Three-Phase Transformers | |||
| Three-Phase Electrical System | 00:00:00 | ||
| Three-Phase Core And Shell Type Transformers | 00:00:00 | ||
| Three-Phase Or Single-Phase Transformers | 00:00:00 | ||
| Three-Phase Transformers Connections | 00:00:00 | ||
| Solved Example 1 On Three-Phase Transformers | 00:00:00 | ||
| Solved Example 2 On Three-Phase Transformers | 00:00:00 | ||
| Vector Group And Nameplate Of A Three-Phase Transformer | 00:00:00 | ||
| Drawing Connection Of Dyn11 Of A Three-Phase Transformer | 00:00:00 | ||
| Drawing Connection Of YNd11 Of A Three-Phase Transformer | 00:00:00 | ||
| Drawing Connection Of Dyn1 Of A Three-Phase Transformer | 00:00:00 | ||
| K-Factor Of A Transformer | 00:00:00 | ||
| Per-Unit Impedance Of A Transformer | 00:00:00 | ||
| Section 5 - Components Of Three-Phase Transformers | |||
| Construction Of Three-Phase Transformer | 00:00:00 | ||
| Iron Core Of The Transformer | 00:00:00 | ||
| Eddy Losses And Saturation Phenomena | 00:00:00 | ||
| Windings Of The Transformer | 00:00:00 | ||
| Types Of Transformer Windings | 00:00:00 | ||
| Insulating Materials In Transformer | 00:00:00 | ||
| Bushings Of The Transformer | 00:00:00 | ||
| Arching Horn And Surge Arrester | 00:00:00 | ||
| Dry And Hermetic Transformers | 00:00:00 | ||
| Cooling Fins And Tubes | 00:00:00 | ||
| Conservator Transformer | 00:00:00 | ||
| Oil Level Gauge And Dehydrating Breather | 00:00:00 | ||
| Buchholz Relay | 00:00:00 | ||
| Methods Of Cooling | 00:00:00 | ||
| Tap Changer In Electrical Transformers | 00:00:00 | ||
| Explosion Vent | 00:00:00 | ||
| Temperature Monitoring And Control Box | 00:00:00 | ||
| Power And Distribution Transformers | 00:00:00 | ||
| Assembly Of A Three-Phase Transformer | 00:00:00 | ||
About This Course
Who this course is for:
- Students or professionals looking to understand magnetic circuits from the ground up
- Anyone seeking a strong foundation in electrical transformers and their real-world applications
- Learners with basic electric circuit knowledge who want to advance into more complex electrical machines
What you’ll learn:
- Core concepts of magnetic circuits
- Fundamental and advanced principles of electrical transformers
- Types and configurations of transformers, including single-phase and three-phase systems
- Practical transformer components and their functions
- Real-world applications, supported by solved examples and step-by-step guidance
Requirements:
- A basic understanding of electric circuit fundamentals is recommended
- Completion of our Electric Circuits course is ideal for grasping circuit analysis more effectively
Build A Strong Foundation in Electrical Machines With This Practical Guide!
This course provides a clear, practical introduction to the essential building blocks of electrical machines, with a focus on magnetic circuits & electrical transformers. It’s designed to help you confidently transition from theoretical understanding to practical application.
Through structured lessons, hands-on examples, and problem-solving exercises, you’ll learn to analyze, design, and troubleshoot critical components used in modern electrical systems.
Magnetic Circuits
We begin with the foundations of magnetic circuits, exploring how magnetic fields behave in different materials and how circuits are designed to direct this flow efficiently.
You’ll explore:
- Permeability – how easily a material becomes magnetized
- Magnetic intensity – the force driving magnetization
- Reluctance – resistance to magnetic flux
- Phenomena like the fringing effect, where magnetic fields spread at circuit edges
- Graphical tools like magnetization curves and hysteresis loops, which help visualize material behavior and energy losses
Electrical Transformers
Next, we turn to electrical transformers, starting from the basics and moving toward advanced analysis and design.
You’ll learn to:
- Distinguish between ideal and real transformer models using phasor diagrams and EMF equations
- Understand winding polarity and how to reflect impedances between primary and secondary sides
- Perform essential transformer tests, including open-circuit and short-circuit tests to measure losses
You’ll also explore:
- Transformer types: autotransformers, three-phase transformers, and their real-world uses
- Construction methods: core-type vs. shell-type
- Three-phase connection codes (e.g., Dyn11, YNd11) and how to interpret them
- Key components: windings, insulation, and cooling systems (oil or air-based)
- Critical protection devices: Buchholz relays and tap changers for voltage regulation
Each topic is explained through step-by-step lessons and detailed solved examples, helping you apply what you learn to real engineering scenarios.
Start Now With My Courses And Build Your Engineering Skills!
Our Promise to You
By the end of this course, you will have learned about Electrical Machines For Electrical Engineering Part I.
10 Day Money Back Guarantee. If you are unsatisfied for any reason, simply contact us and we’ll give you a full refund. No questions asked.Â
Keep Learning and Head to Our Blog Posts For More Actionable Tips and Advanced Strategies!
Course Curriculum
| Section 1 - Course Content | |||
| Course Content | 00:00:00 | ||
| Section 2 - Magnetic Circuits | |||
| Magnetic Flux, Flux Density, And MMF | 00:00:00 | ||
| Magnetic Permeability, Magnetic Intensity, And Reluctance | 00:00:00 | ||
| Solved Example 1 | 00:00:00 | ||
| Solved Example 2 | 00:00:00 | ||
| Fringing Effect In Magnetic Circuits | 00:00:00 | ||
| Representation Of A Magnetic Circuit | 00:00:00 | ||
| Solved Example 3 | 00:00:00 | ||
| Solved Example 4 | 00:00:00 | ||
| Magnetization Curve And Hysteresis Loop | 00:00:00 | ||
| Solved Example 5 | 00:00:00 | ||
| Inductance And Flux Linkage | 00:00:00 | ||
| Course PDF Slides And Files | 00:00:00 | ||
| Section 3 - Basics Of Transformers | |||
| Introduction To Electrical Transformers | 00:00:00 | ||
| Construction And Operation Of A Single Phase Transformer | 00:00:00 | ||
| Ideal Transformer | 00:00:00 | ||
| Phasor Diagram Of An Ideal Transformer | 00:00:00 | ||
| E.M.F Equation Of A Transformer | 00:00:00 | ||
| Polarity Of Transformer Windings | 00:00:00 | ||
| Solved Questions | 00:00:00 | ||
| Solved Examples On Ideal Transformer | 00:00:00 | ||
| Shifting Impedances In A Transformer | 00:00:00 | ||
| Example On Shifting Impedances | 00:00:00 | ||
| Transformer Losses | 00:00:00 | ||
| Practical Transformer And Exact Equivalent Circuit | 00:00:00 | ||
| Approximate Equivalent Circuit | 00:00:00 | ||
| Phasor Diagram Of A Practical Transformer At No Load | 00:00:00 | ||
| Phasor Diagram Of A Practical Transformer At Inductive Load | 00:00:00 | ||
| Solved Example 1 On Practical Transformers | 00:00:00 | ||
| Solved Example 2 On Practical Transformers | 00:00:00 | ||
| Solved Example 3 On Practical Transformers | 00:00:00 | ||
| Solved Example 4 On Practical Transformers | 00:00:00 | ||
| Transformer Voltage Regulation | 00:00:00 | ||
| Transformer Efficiency | 00:00:00 | ||
| Notes About Transformers | 00:00:00 | ||
| Solved Example On Transformer Efficiency | 00:00:00 | ||
| Open Circuit Test | 00:00:00 | ||
| Short Circuit Test | 00:00:00 | ||
| Solved Example On Transformer Parameters | 00:00:00 | ||
| Autotransformer | 00:00:00 | ||
| Solved Example 1 On Autotransformer | 00:00:00 | ||
| Solved Example 2 On Autotransformer | 00:00:00 | ||
| Solved Example 3 On Autotransformer | 00:00:00 | ||
| Core Type Transformers | 00:00:00 | ||
| Shell Type Transformers | 00:00:00 | ||
| Comparison Between Shell And Core Type Transformers | 00:00:00 | ||
| Transformers | 00:00:00 | ||
| Section 4 - Three-Phase Transformers | |||
| Three-Phase Electrical System | 00:00:00 | ||
| Three-Phase Core And Shell Type Transformers | 00:00:00 | ||
| Three-Phase Or Single-Phase Transformers | 00:00:00 | ||
| Three-Phase Transformers Connections | 00:00:00 | ||
| Solved Example 1 On Three-Phase Transformers | 00:00:00 | ||
| Solved Example 2 On Three-Phase Transformers | 00:00:00 | ||
| Vector Group And Nameplate Of A Three-Phase Transformer | 00:00:00 | ||
| Drawing Connection Of Dyn11 Of A Three-Phase Transformer | 00:00:00 | ||
| Drawing Connection Of YNd11 Of A Three-Phase Transformer | 00:00:00 | ||
| Drawing Connection Of Dyn1 Of A Three-Phase Transformer | 00:00:00 | ||
| K-Factor Of A Transformer | 00:00:00 | ||
| Per-Unit Impedance Of A Transformer | 00:00:00 | ||
| Section 5 - Components Of Three-Phase Transformers | |||
| Construction Of Three-Phase Transformer | 00:00:00 | ||
| Iron Core Of The Transformer | 00:00:00 | ||
| Eddy Losses And Saturation Phenomena | 00:00:00 | ||
| Windings Of The Transformer | 00:00:00 | ||
| Types Of Transformer Windings | 00:00:00 | ||
| Insulating Materials In Transformer | 00:00:00 | ||
| Bushings Of The Transformer | 00:00:00 | ||
| Arching Horn And Surge Arrester | 00:00:00 | ||
| Dry And Hermetic Transformers | 00:00:00 | ||
| Cooling Fins And Tubes | 00:00:00 | ||
| Conservator Transformer | 00:00:00 | ||
| Oil Level Gauge And Dehydrating Breather | 00:00:00 | ||
| Buchholz Relay | 00:00:00 | ||
| Methods Of Cooling | 00:00:00 | ||
| Tap Changer In Electrical Transformers | 00:00:00 | ||
| Explosion Vent | 00:00:00 | ||
| Temperature Monitoring And Control Box | 00:00:00 | ||
| Power And Distribution Transformers | 00:00:00 | ||
| Assembly Of A Three-Phase Transformer | 00:00:00 | ||
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