| 摘要 |
The present invention relates to a system for electric pitch control primary for wind turbine blades, which system comprises at least one first electric motor, which motor is electrically coupled to a first electronic control device, which electronic control device controls the operation of the motor, which motor is through a clutch driving a gear mechanism, which gear mechanism has a tooth wheel that drives a tooth ring, which tooth ring is mechanical fixed to the root of a wind turbine blade for performing pitch regulation. It is an object of the pending patent application to improve the reliability of an electric pitch control system. This can be achieved in that the system comprises at least one second motor, which second motor is electric coupled to a second electronic control device, which second electronic control device is coupled to the power grid, which second electronic control device controls the operation of the second motor, which second motor comprises a shaft, which shaft is through a second clutch driving a second gear mechanism, which second gear mechanism comprises at least one second tooth wheel, which second tooth wheel drives the tooth ring. |
