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Fixed speed asynchronous squirrel cage induction generators (SQIG)

Traditional stall concept with the generator directly coupled to the grid. The old stall type turbines used conventional robust asynchronous squirrel cage induction generators (SQIG).

The first generator types were single speed asynchronous generators for the stall type fixed speed turbines, followed by 2-speed generators trying to make the turbines a bit more efficient and also quiet during the silent night time.


  • Single and two speed
  • Air and water cooled
  • Cast iron and steel housing
  • State-of-the-art winding technology
  • Tailor-made to customer specifications

Technical data for fixed speed generators

Output power  55 kW to 2 MW and more 
Frame size  280 to500
Number of poles  4 / 6 
Voltages  690 V 
Frequency  50 or 60 Hz 
Cooling  air or water cooled 
Mounting type  horizontal
Standards   IEC