CN108233325A - A kind of airborne electromagnetic valve supply current sampling protection circuit - Google Patents
A kind of airborne electromagnetic valve supply current sampling protection circuit Download PDFInfo
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- CN108233325A CN108233325A CN201611155268.8A CN201611155268A CN108233325A CN 108233325 A CN108233325 A CN 108233325A CN 201611155268 A CN201611155268 A CN 201611155268A CN 108233325 A CN108233325 A CN 108233325A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
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- Emergency Protection Circuit Devices (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
A kind of airborne electromagnetic valve supply current sampling protection circuit includes; control driving circuit (4), solenoid valve (5); further include power-on impact current filtering circuit (1), current sample detection circuit (2), comparison circuit (3)；After driving current through power-on impact current filtering circuit, normal work of the control driving circuit (4) for drive magnetic valve (5) is flowed through；Current sample detection circuit (2) passes through resistance R simultaneously4Current signal and the voltage of current signal is carried out on acquisition major loop.Transformed voltage signal input comparison circuit (3) carries out voltage comparison；Comparison circuit (3) passes through voltage signal judgement and output overcurrent indication signal；Wherein overcurrent indication signal input control driving circuit (4)；The input current that driving circuit (4) carries out solenoid valve (5) according to the presence or absence of over-current signal is controlled to control.
Description
Technical field
The invention belongs to airborne computer power technology and application fields, and in particular to a kind of airborne electromagnetic valve supply current
Sampling protection circuit.
Background technology
In contemporary aircraft system, more and more using solenoid valve carry out related work, airborne electromagnetic valve work when pair
It is detected using electric current and proposes higher requirement with protection.Due to the requirement of high reliability, protective tube under the conditions of airborne
Components are waited since security reason is used without allowing.When with solenoid valve break down short circuit when, if without overcurrent protective device just
It can lead to unexpected failure or even cause more serious accident.This requirement is under the conditions of airborne in solenoid valve power supply circuit
Current sample and current foldback circuit are must be provided with, load current is monitored in real time, when overcurrent or short circuit occur for load
Faulty circuit is cut off during failure.Current foldback circuit is more at present is realized using intellectual monitoring circuit, complexity in circuits
Height, reliability is low, uses under the conditions of high reliability request and is limited by larger.Electromagnetic valve work power-on impact current compared with
Greatly, simple current foldback circuit can not effectively filter power-on impact current while over-current detection, exist compared with
Big false triggering probability.
In view of the limitation and defective of existing sample rate current detection protection circuit described above, the present inventor is for existing
Technology is furtherd investigate, and has this case generation.
Invention content
The purpose of the present invention develops a kind of solenoid valve supply current sampling and protection circuit, it is desirable that and circuit is simple and reliable,
Load current can be detected in real time, power-on impact current is filtered, enhance system rejection to disturbance ability.When backend load occurs
Faulty circuit is supplied into electroblation when overcurrent or short trouble.
Technical solution of the present invention：A kind of airborne electromagnetic valve supply current sampling protection circuit includes, control driving circuit 4,
Solenoid valve 5 further includes power-on impact current filtering circuit 1, current sample detection circuit 2, comparison circuit 3；It drives current through
After power-on impact current filtering circuit, the normal work that control driving circuit 4 is used for drive magnetic valve 5 is flowed through；Electric current is adopted simultaneously
Sample detection circuit 2 passes through resistance R4Current signal and the voltage of current signal is carried out on acquisition major loop, transformed voltage
Signal input comparison circuit carries out voltage comparison；Comparison circuit 3 passes through voltage signal judgement and output overcurrent indication signal；Wherein
Overcurrent indication signal input control driving circuit 4；Control driving circuit 4 carries out solenoid valve 5 according to the presence or absence of over-current signal and exports
Control.
A kind of airborne electromagnetic valve supply current sampling protection circuit, the power-on impact current filtering circuit 1 wrap
Include sampling resistor R1, diode V1, the diode V1With sampling resistor R1Using parallel connectivity.
A kind of airborne electromagnetic valve supply current sampling protection circuit, the current sample detection circuit 2 includes defeated
Enter current-limiting resistance R2, output current limiting resistance R4, operational amplifier N1, field-effect tube V2, ground resistance R3；The current sample detection
Circuit 2 is by output current limiting resistance R4 by sampling resistor R1Output voltage input operational amplifier N1Positive input terminal, pass through input
Current-limiting resistance R2By sampling resistor R1The negative input end of input voltage input operational amplifier N1 and the S ends of field-effect tube；Operation
Amplifier out connection field-effect tube G ends, field-effect tube D ends are divided into two-way, pass through ground resistance R all the way3Ground connection, another way
It is connected with comparison circuit.
Advantageous effect
The present invention is directed to the problem of airborne electromagnetic valve power-on impact current is larger, creative in current sample detection circuit
2 front ends are provided with power-on impact current filtering circuit.By setting the fast-recovery commutation diode in parallel with sampling resistor, effectively
Reduce and power on the excessive impact malfunction of electric current.And the effective protection sampling resistor in the case where there is overcurrent condition, avoid sampling resistor
The danger that power is excessive and burns.The present invention solves mesh relative to existing airborne electromagnetic valve intellectual monitoring current foldback circuit
The problem of preceding airborne electromagnetic valve current foldback circuit design complexity, circuit structure is simplified, there is highly reliable, effective guarantor
Protect electrical equipment and the safety of supply network.
Description of the drawings
Attached drawing 1 is the present invention program schematic diagram.
Specific embodiment
Electromagnetic valve current sample detecting circuit 2 is using low resistance, high-precision, miniaturization resistance R1, precision is ± 1%,
Resistance value is only 100m Ω, and power 3W meets the requirement of system accuracy and power.Simultaneously using the high-gain fortune of wide scope input
Calculate amplifier N1, field-effect tube V2With inputting current-limiting resistance R2, ground resistance R3Composition, by sampling resistor R1On the electric current that flows through
Value is output to current sample detection circuit 2.The partial circuit component is simple, ensures system reliability.
Power-on impact current filtering circuit 1 is arranged on before current sample detection circuit 2, is prevented during powering on because of electricity
The factors false triggering overcurrent protections such as 5 power-on impact current of magnet valve is excessive.Power-on impact current filtering circuit 1 is by sampling resistor
The upper fast-recovery commutation diode V in parallel of R11It realizes.The solenoid valve regulation protective current driven is 6A, and the recovery soon of use is whole
Flow diode V1Forward direction conduction voltage drop is 0.6V.Normal condition electric current passes through sampling resistor R1Input control driving circuit 4.According to
VF=0.1 × IL, cooperation sampling resistor R1, when upper surge and overcurrent immediate current are more than protective current 6A, diode V1
Forward direction turn-on voltage is less than electric current by sampling resistor voltage value, then electric current can pass through diode V1Input solenoid valve control
Driving circuit；Anti- power-on impact current interference performance is enhanced, while in overcurrent moment to sampling resistor R1It is protected, is avoided
Sampling resistor R1Exceed the situation of rated power using power, increase sampling resistor service life.
Voltage comparator circuit 3 passes through to sample circuit R1Compared with reference level, provide driving current is the level of output
The signal of no overcurrent, by overcurrent indication signal input control driving circuit 4.
Drive control circuit 4 is using electric drive switch high-side driver BTS432.Partial circuit control is simple and convenient,
It only needs by setting resistance, you can realize the break-make control of solenoid valve.Output current is 0A after high-side driver is closed, can be effective
Rear end solenoid valve is powered and forces excision, prevents over current fault from continuing to spread.
The electromagnetic valve driver supply current sampling protection circuit of the present invention has been successfully applied to aircraft power electric
Magnetic valve controller, experiment proves that circuit is working properly.The circuit design is simple and reliable, versatile, can expand to all
In airborne computer electrical equipment, have a good application prospect.
Claims (3)
1. a kind of airborne electromagnetic valve supply current sampling protection circuit includes, control driving circuit (4), solenoid valve (5) its feature
It is, further includes power-on impact current filtering circuit (1), current sample detection circuit (2), comparison circuit (3)；Driving current is led to
After crossing power-on impact current filtering circuit, normal work of the control driving circuit (4) for drive magnetic valve (5) is flowed through；Simultaneously
Current sample detection circuit (2) passes through resistance R4Current signal and the voltage of current signal is carried out on acquisition major loop.Conversion
Voltage signal input comparison circuit (3) afterwards carries out voltage comparison；Comparison circuit (3) passes through voltage signal judgement and output overcurrent
Indication signal；Wherein overcurrent indication signal input control driving circuit (4)；Control driving circuit (4) having according to over-current signal
Without the input current control for carrying out solenoid valve (5).
2. a kind of airborne electromagnetic valve supply current sampling protection circuit according to claim 1, which is characterized in that on described
Surge electric current filtering circuit (1) includes sampling resistor (R1), diode (V1), the diode (V1) and sampling resistor (R1)
Using parallel connectivity.
A kind of 3. airborne electromagnetic valve supply current sampling protection circuit according to claim 1, which is characterized in that the electricity
Sample detecting circuit (2) is flowed including inputting current-limiting resistance (R2), output current limiting resistance (R4), operational amplifier (N1), field-effect tube
(V2), ground resistance (R3)；The current sample detection circuit (2) is defeated by sampling resistor (R1) by output current limiting resistance (R4)
Go out control source operational amplifier (N1) positive input terminal, by inputting current-limiting resistance (R2) by sampling resistor (R1) input voltage
Input operational amplifier (N1) negative input end and field-effect tube (V2) S ends；Operational amplifier (N1) output terminal connection field effect
(V should be managed2) G ends, field-effect tube (V2) D ends be divided into two-way, pass through ground resistance (R all the way3) ground connection, another way is compared with
Circuit (3) is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611155268.8A CN108233325B (en) | 2016-12-14 | 2016-12-14 | A kind of airborne electromagnetic valve supply current sampling protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611155268.8A CN108233325B (en) | 2016-12-14 | 2016-12-14 | A kind of airborne electromagnetic valve supply current sampling protection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108233325A true CN108233325A (en) | 2018-06-29 |
| CN108233325B CN108233325B (en) | 2019-11-15 |
Family
ID=62651214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611155268.8A Active CN108233325B (en) | 2016-12-14 | 2016-12-14 | A kind of airborne electromagnetic valve supply current sampling protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108233325B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114142429A (en) * | 2021-11-08 | 2022-03-04 | 陕西千山航空电子有限责任公司 | Power supply device for electromagnetic valve |
Citations (6)
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| CN201616653U (en) * | 2009-12-24 | 2010-10-27 | 南车南京浦镇车辆有限公司 | Drive protection circuit used for EP valve and skid-proof valve |
| CN102486131A (en) * | 2010-12-06 | 2012-06-06 | 联创汽车电子有限公司 | Driving diagnosis and protection circuit for fuel injector |
| CN203165821U (en) * | 2013-01-17 | 2013-08-28 | 国网智能电网研究院 | Series capacitor type high-voltage direct current circuit breaker |
| CN103501108A (en) * | 2013-10-24 | 2014-01-08 | 深圳威迈斯电源有限公司 | Striking prevention protection circuit for high-voltage direct current power supply circuit and realization method of striking prevention protection circuit |
| CN203476521U (en) * | 2013-10-08 | 2014-03-12 | 北京经纬恒润科技有限公司 | Engine oil atomizer driving system |
| CN105932654A (en) * | 2016-06-27 | 2016-09-07 | 广东美的暖通设备有限公司 | Air conditioner and power supply control circuit of fan for air conditioner |
-
2016
- 2016-12-14 CN CN201611155268.8A patent/CN108233325B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201616653U (en) * | 2009-12-24 | 2010-10-27 | 南车南京浦镇车辆有限公司 | Drive protection circuit used for EP valve and skid-proof valve |
| CN102486131A (en) * | 2010-12-06 | 2012-06-06 | 联创汽车电子有限公司 | Driving diagnosis and protection circuit for fuel injector |
| CN203165821U (en) * | 2013-01-17 | 2013-08-28 | 国网智能电网研究院 | Series capacitor type high-voltage direct current circuit breaker |
| CN203476521U (en) * | 2013-10-08 | 2014-03-12 | 北京经纬恒润科技有限公司 | Engine oil atomizer driving system |
| CN103501108A (en) * | 2013-10-24 | 2014-01-08 | 深圳威迈斯电源有限公司 | Striking prevention protection circuit for high-voltage direct current power supply circuit and realization method of striking prevention protection circuit |
| CN105932654A (en) * | 2016-06-27 | 2016-09-07 | 广东美的暖通设备有限公司 | Air conditioner and power supply control circuit of fan for air conditioner |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114142429A (en) * | 2021-11-08 | 2022-03-04 | 陕西千山航空电子有限责任公司 | Power supply device for electromagnetic valve |
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| Publication number | Publication date |
|---|---|
| CN108233325B (en) | 2019-11-15 |
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