| 摘要 |
The invention discloses a pitch control system for a wind turbine and a method, comprising a main controller, a secondary controller, a motor and a pitch gearbox, wherein 5 the main controller is connected with a plurality of the secondary controllers through a communication bus; each blade corresponds to one controller and at least two motors, and one pitch gearbox is driven by each motor. The main controller is used for calculating a pitch expected 10 value according to wind speed as well as power and rotation speed of a generator; and the motor is driven by the secondary controller according to the pitch expected value, so as to drive the pitch gearbox and hence drive the blades to vary a pitch angle. 30935191 (GHMatters) P89401.AU 23/01/12 Main Controller Secondary Secondary Secondary Controller] Controller2 Controller3 Motor I Motor 2 Motor 3 Figure 1 Main , Controller Secondr Secondary Secondary Contr Controller2 Controller3 Motor_ I Motorl_2 Motor2_I Motor2 2 Motor3_I Motor3 2 Figure 2 3093519_1 (GHMatters) P89401.AU 23/01/12 |
