Working principle of proportional valve

The command signal is amplified by the proportional amplifier, and the proportional output current is given to the proportional electromagnet of the proportional valve. The proportional electromagnet outputs 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 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.
Proportional valve is composed of DC proportional electromagnet and hydraulic valve. The core of proportional valve to achieve continuous control is the use of 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. from.