Wind technology

Kohsel have been a leading supplier of grid chokes and auxiliary transformers to the wind technology industry for more than 20 years.

We are part of the global movement towards renewable energy. Our transformer, reactors and filters are used by customers developing the next generation of wind turbines.

The excellent field reliability and high efficiency of Kohsel products have resulted in a long and impressive list of references.

Today more than 1 million wind turbines around the world are equipped with Kohsel transformers, chokes, and filters. We can benefit from many years of experience to find the optimum solution in terms of efficiency, cost, compact design and maximum output.

Kohsel provides rapid and expert development support for inductive components within wind turbines based on many years of experience within this field.

We are a APQP4Wind Company Member and we have incorporated the APQP4Wind manual into our ISO 9001 Quality system.


There are several reasons to use wind power technology:

  • Produces green energy
  • Reduces CO2 emissions
  • Reduces use of fossil fuels (coal, oil, natural gas)

Grid choke

Grid chokes from Kohsel are used in both onshore and offshore installations. The choke ensures that the alternating current fed into the grid exhibits a sinusoidal waveform.

Auxiliary transformer

The auxiliary transformers provide the auxiliary power supply for installations inside the wind turbine.

APQP4Wind Company Member

As the first transformer manufacturer in the world, Kohsel is now a APQP4Wind Company Member. We have completed and passed the examination of the APQP4Wind training. In parallel with the APQP4Wind training, Kohsel have incorporated the APQP4Wind manual into our ISO 9001 Quality system.

Every day, we strive to unleash the full potential in inductive design. Through our proven process, dedicated engineering and close collaboration, we detect untapped savings and optimization potential throughout your entire value chain.