Control system and control method of integrated proportional slide valve driven by micro stepping motor

Abstract

The present invention discloses a control system of integrated proportion slide valve driven by a mini-type stepper motor and a control method thereof. The system comprises a control signal input module, a processing module, a power driving module, a position signal sampling module, a simulation signal conditioning module and a simulation signal input module; and the processing module is configured to compute the control digital signals and actual position digital signals to obtain pulse width modulation signals and transmit the pulse width modulation signals to the power driving module for controlling the corotation, the inverted rotation, the stepping and the stop of the mini-type stepper motor so as to realize the proportion control of the integrated proportion slide valve. The control system of integrated proportion slide valve driven by the mini-type stepper motor and the control method thereof can realize the accurate proportion control of the integrated slide valve driven by the mini-type stepper motor to improve the control precision and the response time of the integrated proportion slide valve.

Description

technical field [0001] The invention relates to the field of fluid control proportional slide valves, in particular to an integrated proportional slide valve control system driven by a micro stepping motor and a control method thereof. Background technique [0002] In the modern mechanical-electrical-hydraulic integrated control system, the proportional slide valve is the most widely used type of fluid control device. The valve (electromagnetic proportional slide valve) is the most widely used basic component of automatic control among various proportional valves. The electromagnetic proportional spool valve is mainly composed of a proportional electromagnet and a spool valve that controls the fluid passage. The proportional electromagnet generates a corresponding electromagnetic force according to the input signal current or voltage, and drives the spool valve core to produce a certain displacement to change the valve port size. Make the pressure or flow of the output flui...

AI Technical Summary

Problems solved by technology

However, because it is driven by electromagnetic force, in actual engineering applications, the electromagnetic proportional spool valve is subject to operating temperature, fluid hydraulic power, clamping force and friction when the valve core moves, as well as parts processing and manufacturing accuracy, oil pollution and zero. Due to the influence of component deformation and other influences, there will often be changes in the relationship between input and output ratios, and control failure due to spool sticking.

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