Environmental Engineering Reference
In-Depth Information
Developer of the wind turbine, Werner Kastrup Pedersen
observed from his earth excavators that the hydraulic tubes got very
hot due to friction heat in the hydraulic system. He concluded that
a windmill would be able to agitate the oil in a heat brake designed
for the purpose. But this idea was abandoned, and instead he
began to make power-producing windmills with variable pitch
blades and a 58-pole synchronous generator from Transmotor.
And this was certainly a real innovation. Now it would be possible
to do without the gearbox which has caused so many problems for
the windmills. If the Odder people had continued along this track,
then, we in Denmark might have had ring generator wind turbines
on the market ten years before Enercon in Germany, who introduced
the multi-pole generator wind turbine in 1993 and since then
has been among the leading and biggest players in the world.
In Odder, however, they had problems with adjusting the
pitching of the blades to ensure the necessary constant speed of the
rotor and this made them drop the multi-pole generator principle.
Subsequently it has become evident that the speed of rotation
should be regulated electronically and not mechanically in the way
they tried to do it on the Odder windmill.
But there was a stage in between: In the “1983 Nordisk
Vindmøllekatalog” (Nordic Windmill Catalogue) the Odder windmill
is seen with two blades of their own making but with a Hansen
gearbox and a generator from the DDR.
Figure 16.12
Odder windmills: 2-bladed (left); 3-bladed version (middle,
right) (Photos: Flemming Hagensen).
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