Control system for achieving rapid motion of solenoid valve and method of control system

Abstract

The invention discloses a control system for achieving rapid motion of a solenoid valve and a method of the control system. The system comprises a preloading high-voltage source, a preloading stable voltage source, a high-voltage source, a stable voltage source, a negative voltage source, a zero voltage source, a high-speed switching switch, a current detector, the solenoid valve, a pressure sensing system and a controller. Before the expected start-stop moment of the solenoid valve, the preloading high-voltage source is loaded in advance, and the current of a coil is kept at a state slightlysmaller than the open current through the preloading high-voltage source. At the start stage, the high voltage source is adopted for excitation, the current is rapidly increased, and the motion time of the start stage is reduced; and in the stop stage, the negative voltage source is adopted for excitation, the current is rapidly reduced to 0, and the motion time of the stop stage is reduced.

Description

technical field [0001] The invention relates to the field of electromagnetic valve control, in particular to a control system and method for realizing rapid movement of an electromagnetic valve. Background technique [0002] In the solenoid valve, the number of ampere turns and the working air gap have the greatest influence on the electromagnetic force of the electromagnet. Ampere-turns is the product of the number of turns of the coil and the current in the single-turn coil. When the magnetic flux is not saturated, the greater the current, the greater the electromagnetic force; the smaller the working air gap, the greater the electromagnetic force. Since the solenoid valve is often opened when the working air gap in the electromagnet is the largest, and when it is closed is often the time when the working air gap in the electromagnet is the smallest, so the opening current is larger than the closing current. [0003] At present, most hydraulic solenoid valves adopt a sin...

AI Technical Summary

Problems solved by technology

If a smaller drive voltage is used, the current rises slowly during the turn-on phase, which will cause a longer turn-on lag time; if a larger drive voltage is used, due to the large initial current at turn-off, it will cause a longer turn-off lag time

Therefore, the single voltage source control method cannot simultaneously shorten the solenoid valve lag time when opening and closing

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