Drive control method and control device which operates according to the method

A control device for controlling a drive of a vertical mill performing a grinding process, with the vertical mill having a grinding plate rotatable about a vertical axis and drivable by at least one electric motor and a drivetrain comprising at least one gearbox, wherein the control device comprises:

• an input configured to receive a measured actual rotational speed of the drivetrain and a measured drivetrain torque of the drivetrain torque, and to receive a predefined target rotational speed, and
• an output supplying an output signal for a target torque based on the measured actual rotational speed of the drivetrain and based on the target rotational speed as well as on the drivetrain torque in such a manner that the resulting target torque is reduced or increased in an identical direction as a torque resulting from the grinding process.

A vertical mill having a grinding plate rotatable about a vertical axis and drivable by at least one electric motor and a drivetrain comprising at least one gearbox and performing a grinding process, the vertical mill comprising a control device for controlling the drivetrain of the vertical mill, the control device comprising:

• an input configured to receive a measured actual rotational speed of the drivetrain and a measured drivetrain torque of the drivetrain torque, and to receive a predefined target rotational speed, and
• an output supplying an output signal for a target torque based on the measured actual rotational speed of the drivetrain and based on the target rotational speed as well as on the drivetrain torque in such a manner that the resulting target torque is reduced or increased in an identical direction as a torque resulting from the grinding process.