Chapter 05: Understanding Air Gaps and Energy Storage

Everything you need to know about professional magnetic component design. Beginner → Advanced 15 Chapters 100+ Illustrations Engineering Design Examples Interactive Calculators Free Previous Chapter Next Chapter Introduction One of the most surprising concepts in magnetic design is that engineers intentionally make magnetic cores less efficient. At first glance, this seems counterintuitive. Previous chapters explained … Read more

Chapter 04: Understanding Magnetic Core Materials

Everything you need to know about professional magnetic component design. Beginner → Advanced 15 Chapters 100+ Illustrations Engineering Design Examples Interactive Calculators Free Previous Chapter Next Chapter Introduction The magnetic core is one of the most important components in any inductor or transformer. While the winding creates the magnetic field, the core material determines how … Read more

Chapter 03: Understanding Magnetic Flux and Flux Density

Everything you need to know about professional magnetic component design. Beginner → Advanced 15 Chapters 100+ Illustrations Engineering Design Examples Interactive Calculators Free Previous Chapter Next Chapter Introduction Every magnetic component relies on magnetic flux to transfer and store energy. Whether designing an inductor, transformer, motor, or electromagnet, the behavior of the magnetic flux within … Read more

Chapter 02: Understanding Inductance

Everything you need to know about professional magnetic component design. Beginner → Advanced 15 Chapters 100+ Illustrations Engineering Design Examples Interactive Calculators Free Previous Chapter Next Chapter Introduction Inductance is one of the most important concepts in electrical engineering. Every inductor, transformer, motor winding, and magnetic component relies on inductance to store energy and control … Read more

Chapter 01: Introduction to Inductors

Everything you need to know about professional magnetic component design. Beginner → Advanced 15 Chapters 100+ Illustrations Engineering Design Examples Interactive Calculators Free Previous Chapter Next Chapter What Is an Inductor? An inductor is one of the three fundamental passive electronic components, alongside resistors and capacitors. Unlike resistors, which dissipate energy as heat, or capacitors, … Read more

Understanding AL Values in Magnetic Cores

Understanding AL Values in Magnetic Cores If you’ve ever looked at a ferrite core datasheet, you’ve probably seen a specification called the AL value. For many engineers, especially those new to magnetic design, this number can be confusing. Is it an inductance? Does it change with current? Why does it decrease when an air gap … Read more

Industrial 24V to 5V Buck Converter Inductor Design Example

One of the most common power conversion tasks in industrial electronics is converting a 24V DC control voltage into a regulated 5V supply. This type of converter can be found in: Although the converter itself may appear simple, selecting the proper inductor requires balancing ripple current, saturation margin, thermal performance, manufacturability, and cost. In this … Read more

How to Select the Right Magnetic Core Size

One of the most common questions in magnetic component design is: “How big should the core be?” Selecting the correct core size is one of the most important decisions engineers make when designing inductors and transformers. A core that is too small may: A core that is too large may: This guide explains how engineers … Read more

How to Calculate Inductor Energy Storage

One of the most important concepts in magnetic design is energy storage. Whether designing a buck converter, boost converter, flyback transformer, solar MPPT system, or EV power supply, engineers must understand how much energy a magnetic component can safely store. In fact, energy storage is often the parameter that ultimately determines core size, air gap … Read more

EV Onboard Charger Flyback Transformer Design Example (400VDC to 12V)

Modern electric vehicles contain dozens of low-voltage systems that must operate regardless of the traction battery voltage. Control modules, battery management systems, contactors, sensors, cooling systems, and communications networks often require isolated low-voltage power supplies. One of the most common methods of generating this auxiliary power is a flyback converter. At the heart of the … Read more