High-precision motor driving closed-loop control system based on interference suppression circuit

Abstract

The invention discloses a high-precision motor driving closed-loop control system based on an interference suppression circuit. The system is mainly composed of a position regulator, a current regulator connected with the position regulator, a driving circuit connected with the current regulator, a motor connected with the driving circuit, and the like. A grating ruler detects the position pulse of the workbench and feeds the position pulse back to the position regulator, and the position regulator regulates the output number of pulses and frequency in real time according to the detected actual displacement state to make the stepper motor stabilized in a normal running state and to make the actual position and the instruction position consistent so as to locate a workbench accurately. The system is equipped with an interference suppression circuit which can suppress interference signals doped in digital pulse signals fed back by the grating ruler, so that the position regulator can receive more accurate feedback signals and better control the motor, and the workbench can reach a set position accurately.

Description

Technical field [0001] The invention relates to a motor control system, in particular to a high-precision motor drive closed-loop control system based on an interference suppression circuit. Background technique [0002] At present, stepping motors are generally used for drive control when controlling the workbench. One of the main advantages of the stepper motor is that it can guarantee certain control accuracy in the open loop system, but the open loop system also has some shortcomings: for example, it is impossible to know whether the stepper motor is in the constant speed phase of the point movement and the start speed phase. Out-of-step, whether it is over-step at the end of stepping, and the speed change caused by load changes, especially when the load torque is large and there is an impact phenomenon, the out-of-step and lost step are very prominent, which affects the work movement The displacement accuracy of the stage. How to realize the accurate positioning of the wor...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defect that the traditional motor open-loop control system cannot accurately control the motor, thereby affecting the positioning accuracy of the workbench, and to provide a high-precision motor-driven closed-loop control system based on an interference suppression circuit

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