Control method of servo valve and servo valve mechanism

Abstract

The invention discloses a control method of a servo valve and a servo valve mechanism. The control method of the servo valve adopts a drive motor to drive a cam to operate; the cam drives a valve element plug head of the servo valve to realize an opening and closing function, within an opening degree range, of the servo valve; within a theoretical activity curve of the cam, one section of a practical activity curve is selected for controlling the cam to do reciprocating motion in the selected activity curve, and reciprocating motion, in the practical activity curve, of the cam controls a practical ascending and descending stroke of the valve element plug head to realize an opening and closing function of the servo valve; the servo valve mechanism comprises a valve body and a drive motor; and a cam motion track guide block, the valve element plug head, the valve rod and the valve element are arranged in the valve body. The control method of the servo valve and the servo valve mechanism can break through the limit response of servo control, realize high-speed intermittent coating; and meanwhile, intermittent coating balance is improved, so that an intermittent coating material is consistent in thickness, and coating quality is improved.

Description

technical field [0001] The invention relates to the field of servo valves, in particular to a servo valve control method and a servo valve mechanism. Background technique [0002] In the field of lithium battery coating, the current intermittent coating generally relies on the cylinder to control the intermittent coating step valve to achieve intermittent coating. This control method can achieve a coating speed of 15 m / min; some equipment is changed from pneumatic control to electric The driven intermittent coating step valve increases the coating speed to a certain extent. Under this control method, the coating speed of 15-20 / min can be achieved, and the coating speed has been improved. However, trying to continue to increase the intermittent coating speed encountered a bottleneck in the electronic control response. [0003] Generally, the acceleration and deceleration response limit time of servo start-stop is 5-6ms; when the intermittent coating speed is increased to 25-...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the deficiencies of the prior art, the present invention provides a servo valve control method and a servo valve mechanism, which solves the problem of the servo limit response in the prior art, can break through the servo limit of the prior art, and enables gap coating The speed can break through 30m / min, and at the same time solve the defects of the existing technology such as poor uniformity of coating head and tail thickness

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