DRIVE CONTROL METHOD AND CONTROL DEVICE WHICH OPERATES ACCORDING TO THE METHOD
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Accused Products
Abstract
A method and a device for controlling the drive of a vertical mill having a grinding plate rotatable about the vertical axis are disclosed. The grinding plate can be driven by an electric motor and a drivetrain with a gearbox. An actual rotational speed and a drivetrain torque with respect to the drivetrain are detected and are fed to a control device together with a specified target rotational speed. The control device generates an output signal for a target torque based on the actual rotational speed and the target rotational speed and based on the drivetrain torque such that the resulting target torque is reduced or increased in the same direction as a torque resulting from the milling process.
8 Citations
16 Claims
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1-8. -8. (canceled)
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9. A method for controlling a drive of a vertical mill performing a grinding process, with the 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,
measuring an actual rotational speed of the drivetrain and a drivetrain torque or a dynamics of the drivetrain torque, supplying the measured actual rotational speed of the drivetrain and the measured drivetrain torque or the measured dynamics of the drivetrain torque to a control device, together with a predefined target rotational speed, generating with the control device an output signal for a target torque based on the measured actual rotational speed of the drivetrain and the measured drivetrain torque or the measured dynamics of 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.
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13. A control device for controlling a drive of a vertical mill performing a grinding process, with the 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, wherein the control device comprises:
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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. - View Dependent Claims (14, 15)
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16. 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:
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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.
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Specification