Drive control method and drive system operating according to said method
AssigneeSiemens Aktiengesellschaft
InventorAndreas Kube
Life of this patent
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Abstract
A method for drive control of a vertical roller mill having a grinding table rotatable about a vertical axis includes driving the grinding table with a drive train comprising an electric motor and a gearbox with a rotation speed; monitoring a profile of a measured value derived from vibration-relevant measured values to detect a predefined pattern in the profile; and when the predefined pattern is detected, automatically increasing or reducing the rotation speed of the grinding table by a predefined adjustment value. A corresponding drive system operating according to the method is also disclosed.
Claims14
A method for drive control of a vertical roller mill having a grinding table rotatable about a vertical axis, comprising:
- driving the grinding table with a drive train comprising an electric motor and a gearbox with a rotation speed;
- monitoring a measured value profile of derived from measured values to detect a predefined pattern in the measured value profile;
- and
- when the predefined pattern is detected, automatically increasing or reducing the rotation speed of the grinding table by a predefined adjustment value.
A drive system for a vertical roller mill having a grinding table rotatable about a vertical axis, the drive system comprising:
- an electric motor driving the grinding table,
- a frequency converter feeding the electric motor,
- a gearbox arranged between the electric motor and the grinding table, and
- a controller controlling the frequency converter and comprising a pattern recognition device, wherein the pattern recognition device is configured to monitor a measured value profile derived from measured values to detect a predefined pattern in the measured value profile, and wherein the controller is configured to automatically increase or reduce the rotation speed of the grinding table by a predefined adjustment value when the predefined pattern is detected.
A computer program having program code embodied on a non-transitory storage medium and configured to cause a controller of a drive system for a vertical roller mill having a grinding table and a drive train comprising an electric motor and a gearbox, when loaded into a memory of the controller and executed by the controller, to
- drive the grinding table with a rotation speed;
- monitor a measured value profile derived from measured values to detect a predefined pattern in the measured value profile;
- and
- when the predefined pattern is detected, automatically increase or reduce the rotation speed of the grinding table by a predefined adjustment value.
A non-transitory digital storage medium having computer-readable program code which, when loaded into a memory of a programmable controller for a drive system for a vertical roller mill having a grinding table and a drive train comprising an electric motor and a gearbox and executed by the controller, causes the controller to
- drive the grinding table with a rotation speed;
- monitor a measured value profile derived from measured values to detect a predefined pattern in the measured value profile;
- and
- when the predefined pattern is detected, automatically increase or reduce the rotation speed of the grinding table by a predefined adjustment value.
A controller of a drive system of a vertical roller mill having a grinding table and a drive train comprising an electric motor and a gearbox, the controller comprising:
- a processing unit configured to execute program code which, when loaded into a memory of the processing unit and executed by the processing unit, causes the controller to
- drive the grinding table with a rotation speed;
- monitor a measured value profile derived from measured values to detect a predefined pattern in the measured value profile;
- and
- when the predefined pattern is detected, automatically increase or reduce the rotation speed of the grinding table by a predefined adjustment value.
Dependencies are inferred from the claim text.