Case 14848

Improvements in Horizontal-Axis Wind Turbines

Keywords:

Horizontal-axis wind turbine, nacelle, gear transmission

Applications:

Wind energy turbine design

Problem:

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

Technology:

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

    Inventors:

    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

    Publications:

    N/A

    Images:
    wind montagewind device

    Last revised: April 30, 2013

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