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Closed-loop motor driver compensation

A driver, closed-loop control circuit technology, applied in the field of compensation network, can solve problems such as phase lead

Active Publication Date: 2014-08-27
ALLEGRO MICROSYSTEMS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A pole causes a decrease in gain magnitude with frequency and a 90 degree phase lag, while a zero causes an increase in gain magnitude with frequency and a 90 degree phase lead

Method used

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  • Closed-loop motor driver compensation
  • Closed-loop motor driver compensation
  • Closed-loop motor driver compensation

Examples

Experimental program
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Embodiment Construction

[0019] refer to figure 1 , a closed loop control system ("system") 10 is shown. System 10 includes an input source 12 , a controlled system 14 , and a control loop circuit (“circuitry”) 16 coupled between input source 12 and controlled system 14 . Circuitry 16 receives feedback information from controlled system 14 as well as input from input source 12 via feedback path 18 . Circuitry 16 generates error information based on received feedback and input information and provides the error information to forward path 22 between circuit 16 and controlled system 14 . It should be understood that the feedback path may be implemented, for example, to include sensor 23 and / or other feedback path elements. Likewise, forward path 22 may be implemented to include forward path elements (eg, driver circuits) that may be appropriate for the system being controlled. will be referred to later Figure 7 and Figure 9 Exemplary systems including such elements are described.

[0020] still ...

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PUM

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Abstract

The present invention provides a control loop circuit for use in a closed loop control system for controlling a system such as a linear motor. The control loop circuit includes a lead-lag compensator characterized by a lead compensation network configured to reduce output without substantially changing the effect of lead compensation in the frequency response of the control system noise.

Description

technical field [0001] The present invention generally relates to compensation networks in closed loop control systems. Background technique [0002] Closed-loop (feedback) control is usually used in control systems. The frequency response of a closed-loop control system can be characterized by the presence of "poles" and "zeros" derived from the transfer function describing the system. A closed-loop control system can be represented graphically by plotting the positions of poles and zeros on the complex s-plane. The frequency response can be represented graphically in terms of gain and phase components as a function of frequency. A pole results in a decrease in gain magnitude with frequency and a 90 degree phase lag, while a zero results in an increase in gain magnitude with frequency and a 90 degree phase lead. Typically, a compensation network is added to the feedback loop or path of a closed-loop control system for stability. The exact location of the poles and zeros...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B11/01
CPCG05B11/011
Inventor M·G·沃德D·J·哈斯
Owner ALLEGRO MICROSYSTEMS INC