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Closed-loop motor driver compensation

A capacitor and resistor technology, applied in the field of compensation network, can solve problems such as phase lead

Active Publication Date: 2014-12-24
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

[0020] 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.

[0021] still ...

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PUM

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Abstract

The invention relates to closed-loop motor driver compensation. A control loop circuit for use in a closed-loop control system that controls a system such as a linear motor is presented. The control loop circuit includes a lead-lag compensator that features a lead compensation network configured to reduce output noise without substantially changing the effect of the lead compensation in the control system's frequency response.

Description

[0001] This application is a divisional application of the patent application 200980146623.7 with the filing date of September 23, 2009, and the title of the invention is "Closed-loop Motor Driver Compensation". technical field [0002] The present invention generally relates to compensation networks in closed loop control systems. Background technique [0003] 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 m...

Claims

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Application Information

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