One issue in relation to wind
turbines is transfer of electrical power from a moving turbine nacelle to a
stationary turbine tower. This involves high currents though cables with large
Sliding electrical contacts, capable
of transferring high currents with low losses are an interesting possibility
that could allow for more flexibility with regard to wind turbine design.
The subject of study is the
electrical properties of various contact configurations and contact materials
in powder- or liquid form, e.g. graphite powder or a liquid metal with low
melting point. The project will focus on laboratory testing, supported by
analytical calculations and possibly finite element simulations. The project
may include the following elements:
· A literature study within the
subject of electrical contact properties and collection of material data.
· Construction of a test set-up for
testing of electrical contact properties in collaboration with supervisors and
people from the CEE workshop. Electrical, thermal and mechanical aspects must
· Outlining a test plan that covers
variation of parameters such as; contact material, pressure, current density
· Testing as well as evaluation and
interpretation of test results.
· Comparing test results against
calculations and presentation of the results.
· Based on the acquired experience;
coming up with ideas for conceptual design of a three-phase sliding
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