3 reasons for affecting the time of solenoid valve switching speed

The response speed of the solenoid valve is an important index to influence the performance of the solenoid valve. Especially in some cases where the time and frequency are demanding, the response speed of the solenoid valve must be controlled within 0.05s. The engineers in Shanghai Sichuan Basin refer to a series of data at home and abroad, and summarize the influence of the switch speed of the solenoid valve. The three main factors, such as the spool, circuit and remanence, are the main factors of the speed. The switching process of the solenoid valve is to drive the valve core by the force of the electromagnetic force and the reset force of the spring to achieve the opening and closing of the valve.

(1) the motion delay of the valve core
It
Because of the existence of the quality of the stainless steel solenoid valve spool, there is inertia force in the movement of the spool, resulting in motion delay. The way to reduce the motion delay is to increase the driving force and reduce the spool quality.
Fast solenoid valve
(2) the delay of the circuit

It is known from the principle of electromagnetic induction that the current of the coil can not rise to the maximum value immediately because of the inductance of the coil, so that the electromagnetic force can not be raised quickly when the valve is opened, so that the friction force and spring force can not be overcome and the valve core can be opened quickly. Similarly, when the valve is closed, the spring can not immediately overcome the electromagnetic force which has not yet fallen, causing the current delay. The time parameter =L/R is related to the resistance, voltage and relative permeability of the magnetic material.

(3) hysteresis delay
Fast pass solenoid valve
Due to the remanence caused by hysteresis and the existence of eddy currents in the magnetic circuit, there is loss in the working process of the solenoid valve, and the switching speed of the solenoid valve is also affected.