What is the working principle of proportional valve?

The command signal is amplified by the proportional amplifier, and output current proportionally to the proportional electromagnet of the proportional valve. The proportional electromagnet outputs the force and moves the position of the spool proportionally, so that the flow rate of the liquid flow can be controlled proportionally and the flow rate of the liquid flow can be changed. direction, so as to realize the position or speed control of the actuator. In some applications that require high position or speed accuracy, a closed-loop control system can also be formed by detecting the displacement or speed of the actuator.

The proportional valve is composed of a DC proportional electromagnet and a hydraulic valve. The core of the continuous control of the proportional valve is the use of a proportional electromagnet. There are many types of proportional electromagnets, but the working principle is basically the same. They are all developed according to the control needs of proportional valves.