Patent application number | Description | Published |
20110142631 | WIND TURBINE GENERATOR - Provided is a wind turbine generator including an electric pitch-control device that efficiently utilizes the entire circumferential teeth of a ring gear of a wind turbine blade so as to eliminate the need for work at high elevation using a crane or the like even when the teeth of the ring gear are partly broken. A wind turbine generator having an electric pitch-control device that performs pitch-angle control by using a motor to drive a pinion gear that meshes with a ring gear of a wind turbine blade includes a plurality of pinion-driving-mechanism securing supporters or a fixing/releasing switching part as a meshing-region changing mechanism that changes a pitch-angle-control meshing region of the ring gear that meshes with the pinion gear during the pitch-angle control. | 06-16-2011 |
20120114487 | WIND TURBINE GENERATOR - Provided is a wind turbine generator including an electric pitch-control device that efficiently utilizes the entire circumferential teeth of a ring gear of a wind turbine blade so as to eliminate the need for work at high elevation using a crane or the like even when the teeth of the ring gear are partly broken. A wind turbine generator having an electric pitch-control device that performs pitch-angle control by using a motor to drive a pinion gear that meshes with a ring gear of a wind turbine blade includes a plurality of pinion-driving-mechanism securing supporters or a fixing/releasing switching part as a meshing-region changing mechanism that changes a pitch-angle-control meshing region of the ring gear that meshes with the pinion gear during the pitch-angle control. | 05-10-2012 |