Quick opening and closing method of high-speed electromagnetic switch valve

An electromagnetic switch valve, fast technology, applied in the direction of valve operation/release device, valve detail, valve device, etc., can solve the problems of unsatisfactory closing time of high-speed electromagnetic switch valve, loss of voltage stabilization effect of voltage regulator tube, etc. Achieve the effect of speeding up the discharge speed, improving the control performance, and increasing the discharge speed

Inactive Publication Date: 2013-09-04
GUIZHOU NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] However, although a voltage regulator tube is connected in series, when the current is small, the voltage regulator tube will lose its voltage stabilizing effect, and the closing time of the high-speed electromagnetic switching valve is not satisfactory.

Method used

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  • Quick opening and closing method of high-speed electromagnetic switch valve
  • Quick opening and closing method of high-speed electromagnetic switch valve
  • Quick opening and closing method of high-speed electromagnetic switch valve

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Embodiment Construction

[0047] For a better understanding of the present invention, the accompanying Figure 7 Make a brief introduction to the structure and function of the present invention:

[0048] 1) When PWM=1, the counter 74LS161 is set to zero, the address input terminal of 74HC138 is ABC=000, and the output of the Y0 port of the decoder 74HC138 is 0. After being inverted by the inverter, it is input to the TLP250 and then drives the K0 tube to make K0 Tube conducts.

[0049] At the same time, the PMOS transistor Q1 of the CMOS switch circuit is turned on, the NMOS transistor Q2 is turned off, the NMOS transistor Q3 of the switch circuit is turned on, and the power supply VCC of the main circuit charges the switch valve. During the charging process, the potential at point B is zero.

[0050]2) When PWM=0, each functional end of the counter 74LS161 is set to the counting state, the PMOS transistor Q1 of the CMOS switch circuit 1 is turned off, the NMOS transistor Q2 is turned on, the NMOS tr...

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PUM

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Abstract

The invention relates to a quick opening and closing method of a high-speed electromagnetic switch valve. For solving the problem that the closing time of an existing high-speed electromagnetic switch valve is unsatisfied, a follow current branch circuit resistor Rx is replaced by a resistor of a switch array, a follow current branch circuit resistor value is dynamically adjusted by detecting voltage UD at two ends of a coil during the opening and closing process of the high-speed electromagnetic switch valve, so that on the one hand, the voltage at two ends of the coil is ensured to be stabilized and lower than safe backward voltage, a previous-stage switch is ensured not to be broken down during the opening and closing process of the high-speed electromagnetic switch valve; and on the other hand, when the voltage at two ends of the coil is lower than safe voltage UA for a certain value (named as adjusting voltage UT in the method), the coil discharging speed is improved by increasing the follow current branch circuit resistor value, and accordingly the effects of ensuring safety of the previous-stage switch and shortening the closing time of a valve core of the high-speed electromagnetic switch valve.

Description

technical field [0001] The invention relates to a method for accelerating the discharge speed of an inductive coil of an electromagnetic switch valve, in particular to a fast closing method of a high-speed electromagnetic switch valve. Background technique [0002] The circuit of the coil of the high-speed solenoid switch valve when opening and closing is such as figure 1 shown, the PWM signal is as figure 2 As shown, the switch is assumed to be an ideal switch. [0003] When the PWM signal is 1, the switch is turned on, the drive power and the coil are connected, and at t W range, the coil current is: [0004] i = U S R S + R L ( 1 - e t τ ...

Claims

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Application Information

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IPC IPC(8): F16K31/06
Inventor 苏明刘宇刚章俊华杨洪涛何二宝李成亮王珩
Owner GUIZHOU NORMAL UNIVERSITY
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