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

27. May 2024


A joint presence with a strong, innovative range of products for high-performance electrotechnical applications in drives, automation and testing technology…

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Magnetic core technology
2. May 2024

TRAMAG Transformatorenfabrik is a new member of REDUR

We are pleased to announce that with REDUR GmbH & Co. KG we found an excellent buyer for TRAMAG Transformatorenfabrik GmbH & Co. KG as of 2 May 2024 and we are proud to be a new member of REDUR and the Phoenix Mecano family.

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Magnetic core technology
22. January 2024

TRAMAG is alive, operations continue unabated at full power!

TRAMAG is alive, operations continue unabated at full power! “The trick is to get up once more than you are knocked down.” (Winston Churchill) All hands on deck, the TRAMAG […]

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Magnetic core technology
20. December 2023

Christmas & New Year Greetings

The TRAMAG Team would like to thank its customers, business partners and friends for the trust they have placed in us and for their cooperation in partnership over the past year. 2023, another year full of business challenges, but also a year of suffering and misfortune for many people in regions near and far around the world.

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Magnetic core technology
18. December 2023

Quality is when your QMB goes “High-Five-S” with you

We know where quality must ultimately be demonstrated and proven: In the product, in the customer’s application. But where does quality begin? On the one hand in technical development and on the other hand in the organization of workplaces in production. Employees who keep their workstations tidy maintain an overview, have access to the right tools at all times and can work on the product efficiently and with quality assurance.

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Magnetic core technology

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