Controller for digitalized proportional valve with high switching frequency and control method of controller

Abstract

The invention discloses a controller for a digitalized proportional valve with high switching frequency. The controller comprises a microprocessor, a communication port, a drive circuit, a power amplification circuit, a position detection circuit and a circuit detection circuit. The communication port is connected with the microprocessor in a bidirectional communication mode, the position detection circuit and the current detection circuit are connected with analog-digital conversion interfaces of the microprocessor respectively, the microprocessor is connected with the power amplification circuit through the drive circuit, and the power amplification circuit is in electric connection with an electromagnetic coil of the proportional valve. The invention further discloses a control method of the controller for the digitalized proportional valve with high switching frequency. The method comprises the steps that the microprocessor receives a position setting signal and a current setting signal through the communication port, and whether position closed-loop control and current closed-loop control or only the current closed-loop control is adopted in the controller for the proportional valve is judged through a selection switch. By means of the control method, the working modes can be selected according to the actual working demands, and good flexibility and adaptability are achieved.

Description

technical field [0001] The invention relates to a digital proportional valve controller with high switching frequency, and also relates to a control method for the digital proportional valve controller with high switching frequency, belonging to the technical field of proportional valves. Background technique [0002] The electro-hydraulic proportional valve control technology is widely used in mechanical processing, construction machinery, metallurgy and other industries. The basic principle of proportional valve control is to use the stroke force of the electromagnet to be proportional to the magnitude of the current flowing through it. The size of the iron current realizes the control of hydraulic pressure and flow. [0003] Proportional valve control technology currently has two main control methods, namely, analog circuit control and digital control. [0004] At present, the main development trend of the proportional valve controller is to use pulse width modulation te...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a digital proportional valve controller with high switching frequency, and solve the technical problem of low control precision of the proportional valve in the prior art

Images