Wind power electric drive trains from The Switch

Individually tailored permanent magnet generators and full-power converter packages meeting the needs of today's wind turbine applications. Each solution is designed and built to withstand harsh conditions.

Permanent magnet (PM) generators

The Switch designs and manufactures permanent magnet (PM) generators for megawatt-class wind turbines.

  • Reliability extends lifetime
  • Fully tailored according to application
  • Higher efficiency for higher yields
  • Fastest in the market

Medium-speed PMG Low-speed PMG


Traditionally geared PMG 1000 - 2000 rpm
When a wind turbine is traditionally geared, generator speed is typically from 1000 to 2000 rpm at rated point. At this speed the generator is quite small and light. Drawback is that system needs a high speed gearbox, which is a risk for reliability in higher powers.

Semi-geared PMG 100 - 500 rpm
A system is called semi-geared if the generator speed is from 100 to 500 rpm. This means that there is a low-speed gearbox and medium speed generator in drive train. This concept was developed to avoid high state gear and improve the mechanical reliability. Drawback is unique generator and quite high integration level. The Switch has solved this by offering a fast design period, prototyping and mass production ramp-up.Gearless PMG 14 - 20rpm

A modern wind turbine is often gearless - the generator is directly driven and the hub is connected directly to the generator shaft. This is a solution when ultimate reliability is needed. The only drawback of this system is that the generator has a large diameter and is heavy. Size means high integration in to turbine but also fewer components and simplicity. Total weight of the nacelle is not very high, since there is no gearbox.

Full-power converters

Customized power electronics
The Switch's customized power electronics are the ultimate solution to any distributed power issue. These products are electrically and mechanically designed to provide the functionality to meet any conceivable need. The customized product platform delivers seamless interoperability with the other hardware and software systems of the application.

  • Customized
  • Technology
  • Robust
  • Modular
  • High system efficiency

Wind Cluster - Aahavevej 69 DK-8600 Silkeborg - - Phone: 70 20 22 56 - Mobile: 40 35 10 33 - CVR #

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