Active pitch-controlled wind turbine

Abstract

The invention designs an active pitch-controlled wind turbine which is mainly composed of a hub, a generator, an engine room, fan blades, a wind meter, a rotary support bearing and a flange base, wherein, the front end of the generator is connected with the hub, and the back end thereof is connected with the engine room; the wind meter is arranged at the upper part of the engine room, the engine room is connected on the flange base through the rotary support bearing, the fan blades are connected on a pitch-controlled mechanism through a fan blade connecting shaft, a reciprocating pull rod at the tail part of the pitch-controlled mechanism is connected with a pitch-controlled driving rack, the pitch-controlled driving rack is connected with a ball screw-nut mechanism, the ball screw-nut mechanism is matched and connected with sliding slide tracks at the two sides thereof, and a ball screw is matched and connected with a stepping motor through a coupling; a signal output line is arranged on the wind meter to be connected with a controller, and the controller is electrically connected with the stepping motor. A wind velocity signal obtained by measuring the wind velocity through the wind meter is sent to the controller, and the controller calculates the parameters for pitch control, the sliding distance parameters of the reciprocating pull rod, the turns of the rotation of the stepping motor and the direction thereof according to the wind velocity signal and then sends a command to the stepping motor, thereby controlling the fan blades to realize the pitch control.

Description

technical field [0001] The invention relates to a wind power generator, in particular to an active pitch wind power generator. Background technique [0002] Existing wind turbines generally use speed-limiting mechanisms such as yaw, and the pitch technology has shown greater advantages compared with this technology. The existing active pitch wind turbines have a relatively simple structure, and the pitch angle is not accurate enough. , Compared with different wind speeds, the pitch response speed is slow and other shortcomings. Contents of the invention [0003] The object of the present invention is to provide an active pitch wind generator with precise pitch angle, rapid pitch response to wind speed changes and uniform generator output power in order to solve the above technical deficiencies. [0004] In order to achieve the above object, the active variable pitch wind power generator designed by the present invention is mainly composed of a hub, a generator, a cabin, a...

AI Technical Summary

Problems solved by technology

[0002] Existing wind turbines generally use speed-limiting mechanisms such as yaw, and the pitch technology has shown greater advantages compared with this technology. The existing active pitch wind turbines have a relatively simple structure, and the pitch angle is not accurate enough. , relative to different wind speeds, the pitch response speed is slow and other disadvantages

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