worldwide | china PC Control 02 | 2013 The 1.5 MW wind turbine from Zhejiang Windey has a classic design: a three-blade up- wind rotor with horizontal main shaft and three-point bearing. The drive train consists of a three-stage planetary gear and a double-fed induction generator. As an actuator for power or speed control, the plant has an independent pitch system that also encom- passes the servo drives for the blade adjustment. The plan

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