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Figure 16.10
Burmand with one-bladed wind turbine called “nice weather
turbine” (Let vejrs mølle) 1977 (left); one-bladed wind
turbine prototype (right) (Photos: Flemming Hagensen).
16.7
The Kramsbjerg Windmill: A Technical
Innovation
Small windmills for individual homes was the marked segment
that Jørgen Kramsbjerg Hansen went for with his 15 kW Kramsbjerg
wind turbine, which emerged in 1983-1984. Hansen was technically
knowledgeable and had during some years been developing his
construction of a three blade downwind turbine with KJ blades.
His windmill used an industrial gear with a safety factor of almost
three or far more than those of the established factories. The
windmill had a great deal of technical refinements compared to
the general standards within the business. Thus the generator was
not a traditional asynchronous engine connected to the grid.
Jørgen Hansen used a Danish Transmotor synchronous
generator normally used as a generator in smaller ships. It ofered
the advantage that it was possible to adjust the generator to
particular operational conditions by regulating the energising
current. During gales when other windmills were brought to a
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