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Closed-loop control method and closed-loop control device with multi-channel feedback

A technology of closed-loop control and controller, which is applied in the field of closed-loop control of inductive loads and closed-loop control devices

Active Publication Date: 2010-06-16
BECKHOFF AUTOMATION GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this measurement method depends on the existence and knowledge of a specific harmonic-free time point for the control variable, which makes it very sensitive to disturbances

Method used

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  • Closed-loop control method and closed-loop control device with multi-channel feedback
  • Closed-loop control method and closed-loop control device with multi-channel feedback
  • Closed-loop control method and closed-loop control device with multi-channel feedback

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Embodiment Construction

[0031] In the following, the invention will be explained in more detail in connection with the electric motor. However, the present invention is also applicable to other controllers.

[0032] figure 1 The closing train of a typical current control device is shown. Here, the current i of the load, especially the current of an inductive load (such as a motor), is controlled as the control variable x. The closed-loop control system 1 comprises a plurality of components interacting with each other, which form a closed control loop. Current x soll The set value of the current control device 1 as the command variable w, the current x soll This is provided, for example, by the superordinate speed control loop 2 . A comparison component 20 forming the input area of ​​the closed-loop control system 1 compares the current x soll The setting value of and the current x of the current x flowing through the motor coil ist the actual value of . The current x ist The actual value of ...

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PUM

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Abstract

A closed-loop control method with multi-channel feedback is described, in which a feedback variable r1, which is determined by sampling a closed-loop control variable x with a sampling frequency fA, and a further feedback variable r2, which is determined by averaging the closed-loop control variable x over a time period Ts, are each separately compared with a guide variable w. Each of the control errors e1, e1, which are determined in the process is fed to a separate controller 31, 32 which respectively forms therefrom an individual closed-loop control output variable m1, m2. Finally, a closed-loop control output variable m, formed from the individual closed-loop control output variables m1, m2, is used to adjust the closed-loop control variable x so that the closed-loop control variable x follows the guide variable w.

Description

technical field [0001] The present invention relates to a closed-loop control method, in particular to a closed-loop control method for an inductive load such as a servo motor. The closed-loop control method is characterized respectively by a two-channel or multi-channel evaluation of control variables with which a fast and accurate closed-loop control can be implemented. The closed-loop control is preferably implemented by pulse width modulation, which simultaneously includes high spurious signal suppression and high bandwidth. The invention also relates to corresponding closed-loop control devices with two-channel feedback or multi-channel feedback, respectively. Background technique [0002] Many technical procedures require the maintenance of control variables at set values ​​predetermined by command variables. For this purpose, a closed-loop control system is used, in which the controlled variable is continuously measured and compared with the command variable, from w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B11/28G05B11/42G05B21/02G05F1/70
CPCG05B11/28G05B11/42G05B21/02
Inventor 珍丝·翁诺·克拉
Owner BECKHOFF AUTOMATION GMBH