Patent ID: 9033662
Filing Date: 2015-05-19
Classification: F03D,F05B,Y02E

Abstract:
1. A horizontal axis wind turbine apparatus comprising: a main turbine unit supporting a horizontal axis turbine rotatably around a horizontal axis, wherein the horizontal axis turbine has a plurality of blades and rotates around the horizontal axis by receiving wind; a tower supporting the main turbine unit pivotably in the horizontal direction, and allowing the main turbine unit to pivot in accordance with a direction of wind received by the blades; a pivoting position detector provided either on the main turbine unit side or on the tower side, for detecting a position of the main turbine unit in its pivoting direction; a blade rotation angle detector provided on the main turbine unit, for detecting a rotation angle of each of the blades in the rotational direction of the horizontal axis turbine; a blade pitch angle changing mechanism provided on the main turbine unit, for changing a pitch angle of each of the blades independently in a direction that increases the pitch angle or in a direction that decreases the pitch angle; and a pitch angle controller for controlling the blade pitch angle changing mechanism, wherein the pitch angle controller is adapted to calculate a pivoting speed of the main turbine unit based on a detected result of the pivoting position detector, and to control the blade pitch angle changing mechanism based on the pivoting speed of the main turbine unit and the rotation angle of each blade detected by the blade rotation angle detector, so as to continuously adjust the pitch angle of each blade while the horizontal axis turbine is rotating; wherein the pitch angle of each blade is adjusted according to a change direction of the position of the main turbine unit so that the pitch angles of blades that move to the upwind side are controlled to a fine side and the pitch angles of blades that move toward the downwind side are controlled to a feather side.