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PWM control method for increasing response speed of high-speed on-off solenoid valve

A technology of high-speed switch and control method, applied in the direction of valve operation/release device, valve detail, valve device, etc., can solve problems such as prolonging the total closing time, reduce power consumption and closing delay, and reduce closing delay , the effect of reducing the turn-on delay

Active Publication Date: 2016-07-27
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The parameters of the PWM control signal include voltage, frequency and duty cycle; relevant research shows that increasing the voltage of the PWM control signal can shorten the total turn-on time, but it also prolongs the total turn-off time significantly. The influence of frequency and duty cycle on the response speed of high-speed switching valves, there are few relevant studies at present

Method used

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  • PWM control method for increasing response speed of high-speed on-off solenoid valve
  • PWM control method for increasing response speed of high-speed on-off solenoid valve
  • PWM control method for increasing response speed of high-speed on-off solenoid valve

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Embodiment

[0057] Embodiment: This embodiment uses the control method of the present invention to drive and control a certain type of high-speed switching solenoid valve. The parameters of this type of high-speed switching solenoid valve are as follows: the operating frequency range is 200HZ~1KHZ, the rated operating voltage is 12V, and the number of coil turns is 526 turns, the diameter of the moving armature is 9mm, the initial air gap is 2.2mm, and the non-working air gap is 0.2mm. The maximum displacement of the spool is 1.0mm, the moving mass is 0.0045kg, the coil resistance is 6 ohms, the spring precompression is 2.0mm, and the spring stiffness is 1300N m -1 , the viscous damping coefficient is 1.4N·m·s -1 , the hydrodynamic coefficient is 0.005×2E6N m -1 , the vacuum permeability is 4πE-7H·m -1 , Coverage is 0.5mm.

[0058] Such as figure 2 In the solenoid valve hydraulic test system shown, 1 is a hydraulic pump for generating hydraulic pressure, 2 is a PWM signal generator f...

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Abstract

The invention discloses a PWM control method for increasing the response speed of a high-speed on-off solenoid valve. The PWM control method is characterized in that when the high-speed on-off solenoid valve is used as a switch, the on-off control process of the high-speed on-off solenoid valve is set to have three stages; at the first stage, the high-speed on-off solenoid valve is in an open state to a full open state; at the second stage, the high-speed on-off solenoid valve is in the full open state; at the third stage, the high-speed on-off solenoid valve is in the full open state to a closed state; and different frequencies and duty ratios of PWM control signals are set at the different stages. By means of the PWM control method, the open time delay and the closed time delay of the high-speed on-off solenoid valve can be effectively reduced, the response speed of the high-speed on-off solenoid valve is increased, the current of the high-speed on-off solenoid valve at the maintenance stage is reduced, and power consumption of the high-speed on-off solenoid valve is reduced.

Description

technical field [0001] The invention relates to a driving method of a high-speed switching solenoid valve, in particular to a PWM control method for improving the response speed of a high-speed switching solenoid valve. Background technique [0002] The basic working principle of the high-speed switching solenoid valve is based on the external input pulse width modulation (PulseWidthModulation, PWM) control signal to control the electromagnet in the valve to generate or eliminate the electromagnetic suction force, so as to drive the valve core to move back and forth, so that the valve port is in the open or closed state. In the closed state, the on-off control of the liquid flow at the valve port is realized. [0003] The most important feature of the high-speed switching solenoid valve is its high-speed response capability for switching the valve port switching state. The opening time and closing time of the high-speed switching solenoid valve are important indicators refle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K31/06
CPCF16K31/0675
Inventor 夏光施信信吴恵涂波涛谢海杜克滑杨莹郭东云汪韶杰
Owner HEFEI UNIV OF TECH
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