Table 1: Design data for Söderfors turbine and generator.

Turbine

Height 3.5 m
Radius 3.0 m
No. of blades 5

Generator

Stator outer radius 1800 mm
Stator inner radius 1635 mm
Air gap 7 mm
No. of poles 112
Magnet thickness 10 mm
Design power 7.5 kW
Design speed 15 rpm
Design line-to-line voltage (rms) 138 V