CN108223885B - A kind of isolated form back-pressure preventing driving circuit for electromagnetic valve - Google Patents
A kind of isolated form back-pressure preventing driving circuit for electromagnetic valve Download PDFInfo
- Publication number
- CN108223885B CN108223885B CN201611153853.4A CN201611153853A CN108223885B CN 108223885 B CN108223885 B CN 108223885B CN 201611153853 A CN201611153853 A CN 201611153853A CN 108223885 B CN108223885 B CN 108223885B
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- China
- Prior art keywords
- field
- effect tube
- photoelectrical coupler
- solenoid valve
- driving circuit
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
A kind of isolated form back-pressure preventing driving circuit for electromagnetic valve, including latch (D1), photoelectrical coupler (N1), field-effect tube (V1), diode (V2), solenoid valve, solve the problems, such as that solenoid-driven end high-tension circuit connects the high back-pressure damage driving circuit of moment generation with the isolation of control terminal low-voltage circuit with solenoid valve.
Description
1 technical field
This technology belongs to airborne computer interfacing field, is related to a kind of isolated form back-pressure preventing driving circuit for electromagnetic valve.
2 background techniques
With the development of domestic series of small aircraft especially unmanned aerial vehicle design research and development, aircraft integrally steps into full electricity
Epoch, brake system begin to use pressure solenoid valve to carry out braking brake.The solenoid valve that airborne actuator uses is by machine
Power drives output pressure, with high reliability and safety when this requires the control circuit of brake system.
Power supply 28V on pressure solenoid valve anode directly connection machine, it is desirable that control terminal must provide stable " ground " or electrical
Open circuit by circuit on and off, and then controls the opening and closing of solenoid valve, realizes brake function, but face following ask
Topic:
1. the driving voltage that solenoid valve needs is high (28V), and the control voltage inside airborne computer is low (5V), directly hands over
Connection is easy to produce strong electromagnetic interference, needs to carry out electrical isolation；
2. the back-pressure damage driving electricity that the electromagnetic coil of solenoid valve can generate higher (28V or more) in circuit connection moment
Road leads to circuit malfunction.
The invention proposes a kind of driving circuit for electromagnetic valve based on photoelectrical coupler, through-flow diode, is effectively isolated
Solenoid-driven end high pressure and control terminal low pressure, while solving solenoid valve and connect moment and generating high back-pressure damage driving circuit
The problem of, improve the reliability and safety of brake system.
3 summary of the invention
The purpose of the present invention is to propose to a kind of isolated form back-pressure preventing driving circuit for electromagnetic valve, solve solenoid-driven end height
Volt circuit connects moment with the isolation of control terminal low-voltage circuit with solenoid valve and leads to the problem of high back-pressure damage driving circuit.
A kind of isolated form back-pressure preventing driving circuit for electromagnetic valve, including latch D1, photoelectrical coupler N1, field-effect tube V1,
Diode V2, solenoid valve, connection relationship are as follows: the anode of the front end of photoelectrical coupler N1 is connected to control system by resistance R4
Internal 5V power supply；The negative terminal of the front end of photoelectrical coupler N1 is connected to the output end of latch D1；After photoelectrical coupler N1
The anode at end draws two-way, is pulled upward to the 28V power supply of aircraft by resistance R1 all the way, is connected to field-effect tube by resistance R2 all the way
The grid of V1；The negative terminal of the rear end of photoelectrical coupler N1 is connected to 28VGND by resistance R3；The source level of field-effect tube V1 draws two
Road, is connected to 28V voltage by diode V2 all the way, is connected to the negative terminal of solenoid valve all the way；Solenoid valve anode connects aircraft
28V power supply.The drain electrode of field-effect tube V1 is connected to 28VGND.On the output end (drain electrode) and machine of field-effect tube V1 between 28V power supply
Connect through-flow diode V2.
The present invention has been effectively isolated solenoid-driven end high pressure and control terminal low pressure, while solving solenoid valve and connecting wink
Between lead to the problem of high back-pressure damage driving circuit.
4 Detailed description of the inventions
Fig. 1 is isolated form back-pressure preventing driving circuit for electromagnetic valve schematic diagram.
5 specific embodiments
The anode of the front end of photoelectrical coupler N1 is connected to 5V power supply inside the control system by resistance R4；Photoelectric coupling
The negative terminal of the front end of device N1 is connected to the output end of latch D1.When needing to export " ground ", latch D1 latch output is used
For low level, so that photoelectrical coupler N1 is connected, and then continues driving FET V1, conducting is grounded.Finally make solenoid valve
Circuit is connected, actuator work.It the use of latch D1 latch output is high level, so that photoelectricity coupling when needing to export "ON"
Clutch N1 is closed, and then field-effect tube V1 is turned off, and becomes open circuit.Finally Electromagnetic Valve Circuit is disconnected；Latch is selected
SNJ54ABT273W, photoelectrical coupler select JANTX4N48, and field-effect tube selects IRFF130；
The anode of the rear end of photoelectrical coupler N1 draws two-way, is pulled upward to the 28V power supply of aircraft by resistance R1 all the way, and one
Road is connected to the grid of field-effect tube V1 by resistance R2；The negative terminal of the rear end of photoelectrical coupler N1 is connected to by resistance R3
28VGND.The resistance of resistance R1, R2, R3 are changed to 22K Ω, 5K Ω and 10K Ω respectively, are the precision of F shelves 1%, is protected
For card in photoelectrical coupler N1 conducting, the partial pressure VR3 of R1 and R3 are greater than the cut-in voltage Von (4V) of field-effect tube V1, so that field
Effect pipe V1 conducting.VR2=28V* (10/32)=8.75V > Von=4V.
The effect of R4 is to prevent, damage device excessive by latch D1, photoelectrical coupler N1 electric current；The effect of R2 is anti-
It is only excessive by the electric current of field-effect tube V1, damage device.
The source level of field-effect tube V1 draws two-way, is connected to 28V voltage by diode V2 all the way, is connected to electromagnetism all the way
The negative terminal of valve；The 28V power supply of solenoid valve anode connection aircraft.The drain electrode of field-effect tube V1 is connected to 28VGND.Field-effect tube V1's
Through-flow diode V2 is connected on output end (drain electrode) and machine between 28V power supply, the high back-pressure of moment generation is connected when solenoid valve and is greater than
When 28.7V, which is released to by 28V power supply on machine by diode V2, prevents it from causing to damage to the driving circuit
Evil.Diode selects 1N5806；The present invention is applied in brake control system, designs by circuit theory proposed in the present invention
Circuit can be effectively isolated solenoid-driven end high pressure and control terminal low pressure, solve solenoid valve and connect moment generation height
Back-pressure damages the problem of driving circuit, improves brake system reliability.
Claims (1)
1. a kind of isolated form back-pressure preventing driving circuit for electromagnetic valve, including latch (D1), photoelectrical coupler (N1), field-effect tube
(V1), diode (V2), solenoid valve, which is characterized in that connection relationship is as follows: the anode of the front end of photoelectrical coupler (N1) passes through
Resistance (R4) is connected to 5V power supply inside the control system；The negative terminal of the front end of photoelectrical coupler (N1) is connected to latch (D1)
Output end；The anode of the rear end of photoelectrical coupler (N1) draws two-way, is pulled upward to the 28V electricity of aircraft by resistance (R1) all the way
Source is connected to the grid of field-effect tube (V1) by resistance (R2) all the way；The negative terminal of the rear end of photoelectrical coupler (N1) passes through resistance
(R3) it is connected to 28VGND；The source level of field-effect tube (V1) draws two-way, is connected to 28V voltage by diode (V2) all the way, and one
Road is connected to the negative terminal of solenoid valve；The 28V power supply of solenoid valve anode connection aircraft；The drain electrode of field-effect tube (V1) is connected to
28VGND；The output end of field-effect tube (V1) is drain electrode, is connected between 28V power supply on the output end and machine of the field-effect tube (V1)
Connect stream diode (V2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611153853.4A CN108223885B (en) | 2016-12-14 | 2016-12-14 | A kind of isolated form back-pressure preventing driving circuit for electromagnetic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611153853.4A CN108223885B (en) | 2016-12-14 | 2016-12-14 | A kind of isolated form back-pressure preventing driving circuit for electromagnetic valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108223885A CN108223885A (en) | 2018-06-29 |
| CN108223885B true CN108223885B (en) | 2019-11-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611153853.4A Active CN108223885B (en) | 2016-12-14 | 2016-12-14 | A kind of isolated form back-pressure preventing driving circuit for electromagnetic valve |
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| CN (1) | CN108223885B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110013187A (en) * | 2018-10-31 | 2019-07-16 | 九江职业技术学院 | A kind of miniature human body cleaning-nursing machine |
| CN109616275A (en) * | 2018-12-29 | 2019-04-12 | 江苏华宏科技股份有限公司 | The system and method for level control DC electromagnet |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101060288A (en) * | 2007-06-26 | 2007-10-24 | 开源集成电路(苏州)有限公司 | HV starting circuit for AC-DC converter |
| CN203385335U (en) * | 2013-06-27 | 2014-01-08 | 桂林航天电子有限公司 | Intelligent ignition controller of initiating explosive device |
| JP2015050845A (en) * | 2013-09-02 | 2015-03-16 | キヤノン株式会社 | Power source device and image forming apparatus |
-
2016
- 2016-12-14 CN CN201611153853.4A patent/CN108223885B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101060288A (en) * | 2007-06-26 | 2007-10-24 | 开源集成电路(苏州)有限公司 | HV starting circuit for AC-DC converter |
| CN203385335U (en) * | 2013-06-27 | 2014-01-08 | 桂林航天电子有限公司 | Intelligent ignition controller of initiating explosive device |
| JP2015050845A (en) * | 2013-09-02 | 2015-03-16 | キヤノン株式会社 | Power source device and image forming apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108223885A (en) | 2018-06-29 |
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