GE hopes to use superconducting technology inspired by MRI machines to circumvent this problem by eliminating the need for the gearbox. The keys to making the removal of the gearbox economically viable are to reduce the size and weight of the generator, while also reducing speed and increasing torque. The high magnetic fields used in GE’s superconducting technology can go a long way towards decreasing the weight of the generator, as well as reducing the amount of heavy iron used in the construction of the generator.
The design of this new machine will use a new type of architecture, while still relying on the proven cryogenic cooling technology, making the new machine much more reliable than the old. The new superconducting machine aims to have twice the torque density and to also reduce the dependence on the rare earth materials that are utilized in most permanent magnet machines for wind.
With these new machines, GE hopes to provide a larger power level, coupled with an improved energy conversion efficiency, that will help to reduce the cost of energy produced by wind turbines. If this works, perhaps wind-generated power could become a more widespread method of electricity-generation worldwide.
SOURCE: GE
