Electric Starter Generator (SGU)
Starter and generator function are combined in this system and optimized for safety and long time between overhauls (>5000hrs). Rated starter performance is 20kW/30Nm and the machine weighs approximately 7 kg.
A unique safety feature is to withstand internal and external shorts without overheating. A mechanical disconnect system, which allows the machine to be put to a stand still in case of bearing failure is optional.
Compared to Air Turbine Starters and DC Electrical Starters, Inverter Driven Starters can be controlled more accurately. This allows actively suppressing torsion oscillations producing smoother torque profiles.