Skip to content
HF Energy

The same family since 1992

You get equipment built to your requirements by a company Conny Küller founded in 1992, after being in the business since 1956. Today Tomas Küller is managing director.

Hand-bent copper tube inductors of different shapes on a workbench, with a brazing torch and a tube bender

From Philips in 1956 to Vårgatan today

HF Teknik AB was started 1992 by Conny Küller. HF Teknik AB moved from Spånga, Stockholm to Norrtälje. That is where we are today. Conny Küller has been in the business since 1956. He started his career in Philips 1956.

In 2010 HF Teknik AB changed name to HF Energy AB, the new company's president is Tomas Küller, Conny is still in the company as board chairman.

HF Energy AB develop and produce high and middle frequency equipment for hardening, soldering and hot forging for different applications. We develop and produce equipment for our customers based on their specific requirements and demands. The conditions vary from one customer to another, and it takes a great deal of flexibility and creativity to find the best solution for each application. Our machines can be freestanding or part of an integrated production line.

The staff members have long experience of high frequency heating of very thin materials like tooth hardening of saw blades and edge hardening of punch knives. HF Energy AB develop and produce inductors and quenching equipment for different applications.

The Philips years

Conny Küller started his career at Philips. The photos are from the test rooms and workshops where the generators were built.

  1. Sepia photo of a Philips test room with the sign Provrum, livsfarlig spänning (test room, lethal voltage), where men in white coats work at generator cabinets

    The test room

    The generators were run under voltage in the test room before they left the building.

  2. Sepia photo of a Philips workshop where men in white coats build and wire generator cabinets, a pillar drill in the foreground

    The workshop

    The cabinets were built and wired by hand, one at a time.

  3. Colour photo from Svenska AB Philips where men in white and grey coats assemble and test generators with electron valves

    Svenska AB Philips

    Valve generators being assembled and tested at Svenska AB Philips.

References

Our generators are used by a number of different companies all round the world.

  • Lenox
  • Tarkett
  • Fiskars
  • Setra
  • Sandvik
  • Bahco
  • Stanley
  • Scania
  • Volvo

Describe your job

Tell us what is to be heated, how large the parts are and how many you run, and Krister Küller will take it to the workshop in Norrtälje.

To the contact page

© 2026 HF Energy AB · Organization number 556786-4698 Privacy policy