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Solenoid valve driving circuit and solenoid valve

A solenoid valve drive, solenoid valve technology, applied in the direction of circuits, electromagnets, electromagnets with armatures, etc., to achieve the effects of versatility, cost reduction, cost reduction, and power consumption

Inactive Publication Date: 2009-01-14
SMC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the power consumption while the solenoid valve is being driven is larger than the power consumption while the driving state of the solenoid valve is maintained
However, in Japanese Patent No. 3777265, power saving measures are implemented only for the period of maintaining the driving state of the solenoid valve, so it cannot be convincingly said that such power saving measures are efficiently realized for the solenoid valve and the solenoid valve driving circuit

Method used

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  • Solenoid valve driving circuit and solenoid valve
  • Solenoid valve driving circuit and solenoid valve
  • Solenoid valve driving circuit and solenoid valve

Examples

Experimental program
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Embodiment Construction

[0205] As shown in the circuit diagram of FIG. 1 , a solenoid valve 10A according to the first embodiment has a solenoid valve drive circuit 14 connected to an AC power source 16 , and a solenoid coil 12 electrically connected to the solenoid valve drive circuit 14 . In this case, one side of the AC power source 16 (upper side in FIG. 1 ) is electrically connected to the solenoid coil 12 via the switch 18 and the diodes 22, 32 in the solenoid valve driving circuit 14, and the other side of the AC power source 16 side (the lower side in FIG. 1 ) is grounded via a diode 28 inside the solenoid valve drive circuit 14 .

[0206] The solenoid valve drive circuit 14 includes a surge absorber 30, a rectifier circuit 20, diodes 32, 34, 36, 39, a MOSFET (Metal Oxide Semiconductor Field Effect Transistor) 38 as a switch, a switch controller 40, resistors 42, 50, 52, 66, 70, 76, capacitors 48, 56, smoothing circuit 47, light emitting diode (LED) 54, current detection circuit (current dete...

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Abstract

The present invention provides a drive circuit of a electromagnetic valve and the electriomagnetic valve with the same. In the drive dircuit, a current detection circuit generates a pulse signal Sd based on a voltage Vd corresponding to a current I flowing through a solenoid coil, and feeds the pulse signal Sd back to a PWM circuit of a switch controller. The PWM circuit generates a pulse signal Sr having a predetermined duty ratio, based on a comparison between the fed back pulse signal Sd and a voltage value corresponding to a first current value or a second current value, and supplies the pulse signal Sr to a pulse supplying unit. The pulse supplying unit supplies the pulse signal Sr as a first pulse signal S1 and / or a second pulse signal S2 to a gate terminal G of a MOSFET.

Description

technical field [0001] The present invention relates to a solenoid valve driving circuit, wherein after a first voltage is applied to a solenoid coil of the solenoid valve to drive the solenoid valve, a second voltage is applied to the solenoid coil and the driving state of the solenoid valve is maintained; This solenoid valve drives the solenoid valve of the circuit. Background technique [0002] Generally, it is widely used to place a solenoid valve in the fluid passage; by applying voltage from the solenoid valve drive circuit to the solenoid coil of the solenoid valve, the solenoid valve is attracted to open or close the fluid passage. At this time, after the solenoid valve is driven by applying the first voltage to the solenoid coil of the solenoid valve from the solenoid valve driving circuit, the driving state of the solenoid valve is maintained by applying the second driving voltage to the solenoid valve from the solenoid valve driving circuit. [0003] Recently, re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K31/06H01F7/18
CPCH01F2007/1888H01F7/1844F16K31/0675H01F7/1811
Inventor 深野喜弘吉田正美土居义忠生出滋春
Owner SMC CORP