Researchers from Sandia National Laboratories reported successful testing of Twistact technology to replace expensive
The developed device uses a new approachto the transmission of electrical current between a fixed frame and a rotating frame, or between two rotating assemblies having different speeds or directions of rotation, which is ideal for wind turbine applications.
Diagram of the Twistact device. Image: Sandia National Laboratories
Researchers explain that most largeModern wind generators use rare earth magnets to convert energy into electricity. These materials have a high upfront cost, and any disruption in supply chains drives up the cost of energy production.
Twistact is a purerolling contact to transfer electrical current along an ultra-low resistance path. The technology is proving useful in reducing costs, improving sustainability and reducing maintenance costs due to reduced wear. Laboratory experiments have shown that a new installation can operate without replacement for 30 years (the entire life of the wind farm).
A two-channel Twistact device for a multi-megawatt direct drive wind turbine. Image: Sandia National Laboratories
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