Case 14848

Improvements in Horizontal-Axis Wind Turbines


Horizontal-axis wind turbine, nacelle, gear transmission


Wind energy turbine design


Conventional horizontal-axis wind turbines require a geared transmission, which tends to be large, heavy, prone to failure, and leads to losses.


The invention describes two concepts to address the need to avoid the need for gear transmission.

  • Mount a circular shroud around the turbine-blade tips, carrying permanent magnets or iron laminations or possibly conductors. These would pass close to a short stator carried on the main turbine pillar that would generate the electric power.
  • Have a single permanent magnet or high-permeability-iron stack at the end of each blade of a wind turbine. A “stator” would extend in an arc of 60 degrees (for a three-bladed rotor) on two sides of the main turbine column, creating a continuous torque on the turbine rotor and generating electric power.
  • Advantages:
    • Make nacelle lighter and smaller by removing gear transmission and moving generator to a location on the main support, near ground level
    • Greater reliability because step-up gear transmission is the main cause of turbine downtime
    • Easier to service
    • Lower installtion costs
    • Increased efficiency by eliminating gear losses


    Intellectual Property:

    US Patent Application Number 13/545027, filed on July 10, 2012

    PCT Patent Application Number PCT/US2012/046362, filed on July 12, 2012



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    Last revised: April 30, 2013

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