Magnetic core technology made by TRAMAG

– What you can rely on

Insights into the transformer and choke production of a leading specialist


Advantages of in-house core production

Due to our own production of magnetic cores from electrical sheets, we can flexibly respond to customer requests in the given installation space and thus make transformers and chokes deeper, higher or wider, for example. This depends on the installation space the customer has available in his system. In addition, by cutting electrical sheet and laying the cores in-house, we shorten the throughput times and thus also the delivery times, as we are not dependent on upstream suppliers. TRAMAG keeps an extensive e-sheet coil stock of a wide variety of types in order to be able to react quickly to the most diverse requirements.

Technical data of the electric sheet processing

For the production of magnetic cores for transformers and chokes

  • Sheet widths from 20 – 200mm possible
  • Tolerance 0.02 mm
  • Cutting speed max. 285 m/min


A cleanly laid core has fewer losses and thus a higher efficiency.

Many years of experience in the production of magnetic cores

The delivered electric sheet coils are first checked for core magnetisation losses. Then the programming is adjusted to various factors using the cutting plan. These include length, width, sheet quality, number of holes and hole size. The entire process is constantly monitored using calibrated measuring equipment. The sheet metal core is assembled according to drawing specifications (sheet metal quality, layer height, window length FL, window height FH), which are checked precisely. Finally, the braces are mounted and the finished magnetic core is set up to accommodate the coils.

The better a core has been aligned, the lower the no-load current, which in turn results in higher efficiency!

Would you like to find out more about our customised products?

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Always up to date in transformer technology

6. December 2023

“Quality is when the Customer comes back and not the Product”

The most technically innovative or economically attractive product in an application is worth nothing if the quality is not right. Not only would the failure of the product itself have to be lamented, but possibly also further damage to the entire application.

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Magnetic core technology
22. November 2023

TRAMAG Interview with Easy Engineering Magazin

In a recent interview with Easy Engineering magazine, Jan Reinecke, member of TRAMAG’s management board, presents TRAMAG’s business activities and innovative products and provides current and exciting insights into relevant market trends.

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Magnetic core technology
8. November 2023

TRAMAG at SPS 2023 in Nuremberg from 14 to 16 November

We are looking forward to your visit at our booth 523 in hall 4. We, TRAMAG employees from technology and sales, welcome you there and are curious how and with what we can help you. Of course, we will once again be exhibiting innovative TRAMAG product solutions on our stand area, which represent an interesting cross-section of our current range for relevant applications in the drives and automation industry.

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Magnetic core technology
18. October 2023

TRAMAG at the SPS 2023

The SPS trade fair is undisputedly the annual highlight, the showcase, of the industrial automation and drive sector with over 40,000 visitors expected.

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Magnetic core technology
27. September 2023

100-year TRAMAG Company History on the Franconian Sea

We celebrated TRAMAG’s 100th birthday on the Franconian Sea like a centennial event … the TRAMAG century. The festive mood of a good-humoured company on the MS Brombachsee, accompanied by a Mediterranean-like summer evening, romantic sunset and shining starry sky made this small cruise an unforgettable event.

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Magnetic core technology

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