MK Magnetics, Inc.’s focus has always been simple: engineer magnetic cores that work where it matters most. Whether that means running day after day in a utility system, delivering clean signals in a hospital scanner, or keeping up with extreme pulsed energy demands in defense projects, our products are built to handle the pressure.

If you take a look across our product line, you’ll notice something in common, each one is built with the same attention to material science, precision winding, and application-driven design. From our long-standing portfolio of tape-wound cores to our new families of high flux density cores, high permeability cores, and pulse charging cores, every solution we build has a clear purpose: giving engineers reliable tools they can count on.

The Foundation: Tape-Wound Cores

Much of what we do starts with tape. By winding ultra-thin strips of magnetic alloy into a toroidal or rectangular form, we can create highly uniform magnetic paths. This process, called tape-winding, is one of the reasons our cores perform consistently across so many industries.

A tape-wound core might look simple from the outside, but the process behind it is anything but. It involves:

• Slitting: Cutting the strip of alloy to exact width tolerances.
• Winding: Layering the strip into a specific geometry.
• Annealing: Heat treating to optimize grain structure for magnetic performance.
• Cutting/Gapping: Creating custom shapes or introducing air gaps when needed.
• Insulating/Coating: Protecting the core against breakdown or environmental wear.
• Testing: Verifying every core to make sure it behaves exactly as it should under real-world loads.

The advantage of this method is flexibility. We can work with a wide range of alloys, nanocrystalline, amorphous, silicon steel, nickel, cobalt, depending on what your project demands.

Need compactness? High saturation? Low loss? The right combination of material and winding design makes that possible.

High Flux Density Cores

When systems push higher power levels, you can’t afford for a core to saturate early. That’s where our high flux density cores step in.

These cores are built using alloys with saturation points far beyond what ferrites can handle. In practice, that means you can get the same performance out of a smaller component, or run higher currents without distortion.

Why engineers choose high flux density cores:

• They’re compact but powerful.
• They hold steady under DC or AC bias.
• They help cut down energy losses in switching regulators or converters.
• They operate across a broad temperature range without drifting out of spec.

You’ll often find these cores in:

• Power transformers where efficiency is everything.
• Flyback circuits that demand compact but resilient designs.
• Magnetic amplifiers and similar control systems.
• High-current inductors in modern power electronics.

In simple terms: if you want strong magnetic performance without adding unnecessary bulk, high flux density cores are often the go-to choice.

High Permeability Cores

On the other side of the spectrum are applications where sensitivity and efficiency outweigh brute strength. That’s the purpose of our high permeability cores.

High permeability means the material doesn’t take much effort to magnetize, so less current is wasted in the process. The result is better efficiency, lower heat, and high responsiveness to changing magnetic fields.

Key advantages include:

• Low core loss even in high-frequency conditions.
• Fast responsiveness to dynamic magnetic environments.
• Compactness, since systems don’t need oversized parts to compensate for losses.
• Thermal stability, especially in nanocrystalline formulations.

Typical uses:

• Filters (EMI/RFI): Where noise reduction is critical.
• Medical Imaging Systems: Accuracy depends on magnetic precision.
• Signal Converters: Maintaining clean signals with minimal distortion.
• EV Charging Stations: Where efficiency translates directly into faster charging and lower energy waste.

Our team has seen high permeability cores really shine in cases where designers are chasing every last bit of efficiency, think next-gen renewable energy inverters or sensitive telecom infrastructure.

Pulse Charging Cores

Then there are environments where nothing about the conditions is “normal.” Pulse systems fall into that category.

When you need to store energy and release it in a sharp burst (over and over again) the magnetic core becomes the deciding factor in whether the system runs reliably. Our pulse charging cores are designed specifically for this challenge.

Common applications include:

• MRI and CT machines in hospitals.
• Radar and directed energy systems in aerospace and defense.
• Particle accelerators in research labs.
• Fusion research projects testing new ways to generate power.

What sets them apart:

• They’re engineered for extreme waveforms.
• They can endure repetitive pulsing without breaking down.
• Each one is custom-built to handle the voltage, frequency, and energy storage requirements of the project.

In systems like MRI, precision is everything. A single mistimed pulse can throw off an entire image. That’s why engineers rely on pulse charging cores that deliver consistently, cycle after cycle, without unexpected shifts in performance.

Case Example: Medical Imaging

It’s easier to see the value when you picture a real-world system. Take MRI scanners, for example.

To generate images, the machine uses timed bursts of magnetic energy to align hydrogen atoms in the body. If those pulses aren’t perfectly controlled, the images won’t be reliable. That means the difference between a doctor getting clear diagnostic data—or not.

Our pulse charging cores have been built into MRI systems for years. Their stability under pulsed conditions helps reduce heat, improve timing accuracy, and ultimately contribute to patient safety.

This is one of those cases where a component most people never see plays a huge role in everyday technology.

Material Choices That Matter

One of the things we emphasize with customers is that there’s no universal “best” material. It always comes down to the application.

• Nanocrystalline: High permeability, low loss, and excellent for both efficiency and high-frequency designs.
• Amorphous Alloys: Strong all-around performance at high frequencies.
• Silicon Steel: Cost-effective and reliable for many standard transformers.
• Nickel and Cobalt Alloys: Preferred for very specific, high-frequency or precision applications.

By offering such a range, we give engineers the ability to fine-tune designs rather than compromise.

How We Build for Reliability

All of this is backed by a manufacturing process that’s as controlled as it is flexible. We’re certified to ISO 9001:2015 and comply with RoHS, REACH, ITAR, DFARS, Mil-Spec, ANSI/ASTM, and EIA RS-217 standards.

We don’t just make cores, we test them as well. Every batch is validated for inductance, permeability, loss, and saturation. That kind of detail is why our parts make it into critical systems across defense, aerospace, medical, and energy markets where downtime isn’t an option.

Industries That Count on Our Cores

Our cores, from high flux density to high permeability and pulse charging types, are used by engineers in:

• Medical imaging and therapeutic equipment.
• Energy research facilities, including pulsed and fusion projects.
• Aerospace and defense systems require compact, rugged parts.
• Electric vehicles and renewable energy power electronics.
• Telecommunications and computing equipment.

Each market brings different needs, some push size constraints, others care most about efficiency, while some demand extreme durability. The common thread: all of them need cores they can trust.

Looking Forward

The trend in almost every industry is toward smaller, faster, and more efficient systems. As power electronics evolve, the role of advanced magnetic materials grows more important.

Nanocrystalline and amorphous materials are already proving they can outperform legacy options, while pulse applications continue to expand into areas like medical tech and energy research.

Our commitment is to stay in step with that evolution. That means investing in new alloys, refining manufacturing processes, and working directly with customers to solve the kinds of challenges that can’t be met with an off-the-shelf core.

Partner with MK Magnetics

Choosing between a high flux density core, a high permeability core, or a pulse charging core depends on your design goals. Our team works closely with engineers to make sure every core matches the application, not just in theory, but in real-world operation.

If your project demands precision, efficiency, or resilience under extreme conditions, you don’t need to compromise. We’ll help you design with the right materials, geometry, and finishing for the outcome you want.

Contact us today to discuss how MK Magnetics can support your next project with cores designed for performance and reliability.