Motor closed-loop control system based on driving circuit

Abstract

The invention discloses a motor closed-loop control system based on a driving circuit, which is characterized by mainly comprising 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, a working table connected with the motor, a grating ruler serially connected between the working table and the position regulator and a current acquisition circuit serially connected between the motor and the current regulator. A position pulse of the working table is detected via the grating ruler, the position pulse is fed back to the position regulator, the position regulator adjusts the outputted pulse number and the frequency in real time according to the detected actual displacement state, a stepper motor can be stabilized in a normal operation state, the actual position is consistent with an instruction position, and thus, the working table can be precisely positioned. The driving circuit can precisely drive the motor, the working table can be precisely controlled, and the working table reaches the set position.

Description

technical field [0001] The invention relates to a motor control system, in particular to a motor closed-loop control system based on a drive circuit. Background technique [0002] At present, stepper 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 a certain control accuracy in the open-loop system, but the open-loop system also has some disadvantages: for example, it is impossible to know whether the stepper motor is in the constant speed stage of point movement and the speed-up stage of starting. Out of step, whether to overstep at the end of the step, and the speed change caused by the load change, especially when the load torque is large and there is an impact phenomenon, the out of step and lost step phenomenon is very prominent, thus affecting the work movement Table displacement accuracy. How to realize the accurate positioning of the workbench is a top priority at pr...

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, thus affecting the positioning accuracy of the workbench, and to provide a motor closed-loop control system based on the drive circuit

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