Method and device for controlling a rotational speed of a drive
AssigneeSiemens Aktiengesellschaft
InventorAndreas Kube
Life of this patent
Estimating the term…
Abstract
In a method and a corresponding device for controlling a rotational speed of a drive driving a shaft, the rotational speed is controlled by a control device which is supplied with a control deviation calculated based on a desired value and an actual value for the rotational speed. The actual value for the rotational speed of the shaft is measured on the shaft with a first sensor and at least one additional sensor and the actual value is calculated from a weighted average of the individual measured values for the rotational speed obtained from the first and the at least one additional sensor.
Claims11
A method for controlling a rotational speed of a heavy-duty drive driving a rotating shaft, comprising:
- measuring on the rotating shaft with at least two sensors, including a first sensor and at least one additional sensor spaced from one another along an outer circumference of the rotating shaft, an actual value of an angle of rotation of the rotating shaft or a time derivative thereof;
- forming an actual value of the rotational speed of the rotating shaft based on a weighted average of individual measured values obtained from the first sensor and the at least one additional sensor;
- calculating a control deviation of the rotational speed of the rotating shaft from a predetermined desired value for the rotational speed of the shaft and the actual value for the rotational speed of the shaft based on the weighted average of the individual measured values obtained from the first sensor and the at least one additional sensor;
- and
- supplying the calculated control deviation to a control device configured to control the rotational speed of the rotating shaft.
A device for controlling a rotational speed of a heavy-duty drive driving a rotating shaft, comprising:
- at least two sensors including a first sensor and at least one additional sensor assigned to the shaft so that they are spaced from one another along an outer circumference of the rotating shaft, each sensor configured to measure an angle of rotation of the rotating shaft or a time derivative thereof, and
- a control device configured to form an actual value of the rotational speed of the rotating shaft based on a weighted average of individual measured values obtained from the first sensor and the at least one additional sensor, to calculate a control deviation of the rotational speed of the rotating shaft from a predetermined desired value for the rotational speed of the rotating shaft and the actual value for the rotational speed of the rotating shaft based on the weighted average of the individual measured values obtained from the first sensor and the at least one additional sensor;
- and
- to control the rotational speed of the rotating shaft based on the calculated control deviation.
A method for compensating for faults in a measurement of a rotational speed of a rotating shaft of a heavy-duty drive with at least two sensors including a first sensor and at least one additional sensor assigned to the rotating shaft so that they are spaced from one another along an outer circumference of the rotating shaft, the method comprising forming a measured value for the rotational speed of the rotating shaft based on a weighted average from individual measured values obtained from the first sensor and the at least one additional sensor.
A device for compensating for faults in a measurement of a rotational speed of a rotating shaft of a heavy-duty drive with at least two sensors including a first sensor and at least one additional sensor assigned to the rotating shaft so that they are spaced from one another along an outer circumference of the rotating shaft and located substantially opposite to one another, the device configured to form a measured value for the rotational speed of the rotating shaft based on a weighted average from individual measured values obtained from the first sensor and the at least one additional sensor.
Dependencies are inferred from the claim text.