Double-fed Induction Generators (DFIGs) are advanced asynchronous electrical machines widely used in renewable energy, especially wind power, converting mechanical energy into stable electrical energy[

Constructed as wound-rotor slip ring machines, DFIGs have stator windings directly connected to the power grid, while rotor windings link to a bidirectional AC-DC-AC converter via slip rings and brushes[2[7

A core advantage is their cost-efficiency: the partial-rated converter reduces equipment costs compared to full-converter systems[3

DFIGs feature a robust design with rigid rotors for high overspeed withstand, insulation systems to resist converter voltage peaks, and low-maintenance slip ring configurations[2

Common applications primarily include wind turbines, both onshore and offshore, as well as variable-speed pumped-storage hydropower plants[

BENEFITS

• Use in on- and offshore turbines
• Compatible with directives regulating the connection to the grid network
• Custom-designed to turbine and converter requirements
• Cost-optimized system configuration with adaptation by the converter
• Available as versions 50 Hz, 60 Hz or combined 50/60 Hz
• Simple connection to the grid network and frequency regulation with full-converter solution
• Flexibility thanks to cooling options: open cooling IP34, air-/air- or air-/water-cooling

Generators specifications