Wind turbine drive control device and control method of wind turbine drive device

A wind turbine drive control device for controlling a plurality of drive devices each including a brake unit, a drive unit, and a transmission unit, the brake unit being configured to generate a braking force for stopping a second structure relative to a first structure, both the first and second structures being included in a wind power generation device, the drive unit being configured to generate a drive force for moving the second structure relative to the first structure, the transmission unit being configured to transmit the braking force and the drive force to the first structure, the wind turbine drive control device comprising:

• an obtaining unit for obtaining information based on a force acting on a fastener fixing the plurality of drive devices to the second structure;
• and
• a control unit configured to switch between a drive period in which the second structure is moved relative to the first structure and a stop period in which the second structure is stopped relative to the first structure, the control unit being further configured to control the plurality of drive devices so as to cause a force generated by at least one of the plurality of drive devices to be reduced or zero based on the information obtained by the obtaining unit during the stop period.

A control method of a wind turbine drive device, for controlling a drive device for moving two structures included in a wind power generation device relative to each other, the control method comprising:

• obtaining information related to a load occurring between the drive device and one of the two structures that receives a force generated by the drive device;
• and
• controlling the drive device so as to cause a force generated by the drive device to be reduced or zero based on the information related to the load during a stop period in which the two structures are stopped relative to each other.