Table 1: Data for a 200 kW H-rotor with direct drive.

Radius ( ) 13 m
Blade area ( ) 58 m2
Shaft torsional stiffness ( ) 3·106 Nm
Turbine moment of inertia ( ) 3·105 kg m2
Generator moment of inertia ( ) 2.4·103 kg m2
Inner resistance of generator ( ) 0.065 Ω
Noload voltage per angular velocity ( ) 140 Vs