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Facts Worth Knowing About Frequency Converters

Danfoss has been manufacturing and supplying VLT® frequency converters (adjustable frequency drives) for AC motors since 1968. 

Facts Worth Knowing About Frequency Converters gives a simple introduction to the work and build-up of a frequency converter and the AC motors connected to it.

The basic elements are described in four main sections:
  • AC Motors
  • Frequency converters
  • Frequency converters and motors
  • Protetion and safety when using frequency converters
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40 Years of Progress

1969 was the year Danfoss put VLT® 5 on the market.
Some drives from the first series still control motor speed in their applications, proving VLT® reliability.

Customer driven development has ever since assured the reliability, innovation and flexibility that make VLT® the strongest brand in the global drives market and made Danfoss Drives a leading provider of frequency converters globally.

The 40th anniversary year, 2008, illustrates the progress, as the product range is completed to cover the entire low voltage market with series from 0.18 kW to 1.2 MW.