CN103346553B - Anti-reverse and the anti-relay coil short-circuit control circuit of a kind of electronic controller - Google Patents
Anti-reverse and the anti-relay coil short-circuit control circuit of a kind of electronic controller Download PDFInfo
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- CN103346553B CN103346553B CN201310285978.2A CN201310285978A CN103346553B CN 103346553 B CN103346553 B CN 103346553B CN 201310285978 A CN201310285978 A CN 201310285978A CN 103346553 B CN103346553 B CN 103346553B
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- 230000001681 protective effect Effects 0.000 claims abstract description 34
- 239000000853 adhesive Substances 0.000 claims description 8
- 230000001070 adhesive effect Effects 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 230000001052 transient effect Effects 0.000 claims description 4
- 239000003381 stabilizer Substances 0.000 claims description 3
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- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000007958 sleep Effects 0.000 description 2
- 230000002618 waking effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
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- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005059 dormancy Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
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Abstract
The invention provides the anti-reverse and anti-relay coil short-circuit control circuit of a kind of electronic controller, comprise power supply, relay, drive circuit, switch, protection diode, protection electric capacity, divider resistance and protective resistance.The fuse burnt when efficiently solving current a lot of reverse power connection, changes the problem that fuse is wasted time and energy, is applicable to high or low power equipment; There is delayed-breaking-off function simultaneously, data when control circuit or rear end equipment work are stored, prevents loss of data; Effectively can also prevent relay coil short circuit from causing control circuit or rear end equipment to damage simultaneously, available protecting can be carried out to control circuit or rear end equipment.
Description
Technical field
The present invention relates to electronic controller field, particularly anti-reverse the and anti-relay coil short-circuit control circuit of a kind of electronic controller.
Background technology
In the environment for use of DC power supply, power positive cathode may connect instead when operating and not noting by user, causes control circuit or rear end equipment to be burnt.And major part prevents the guard method of problems from being blown fuse at present, namely when reverse power connection, blown fuse, protecting control circuit or rear end equipment are not damaged, but change fuse to waste time and energy, after blown fuse simultaneously, cause control circuit or rear end equipment not to work, need cost resource to go for the place seeking the system failure, not only influential system runs, and also wastes a large amount of human resources; Patent of invention (200620141245.7) discloses a kind of anti-reverse power connection circuit, uses diode to carry out anti-reverse protection, because diode exists forward voltage drop, there is power loss, be only applicable to low-power equipment.For relay itself; due to used occur for a long time aging, to change or in debug process; there is relay coil short circuit may occur; very easily cause the control circuit that involves great expense or rear end equipment to damage, but at present not for after relay coil short circuit to the method that control circuit or rear end equipment are protected.
Simultaneously, rear end equipment needs certain hour to preserve current operational data when power-off, but current most of control circuit is control circuit or rear end equipment power-off immediately after switch disconnects, important process data before power-off are lost immediately, current operational data cannot be preserved, cause unnecessary loss; And major part can realize waking up the control circuit with sleep mode at present, all certain loss is existed to power supply, when power supply is powered battery, if control circuit or rear end equipment are in resting state for a long time, this loss by runs out of battery power, may cause control circuit or rear end equipment power-off.
Summary of the invention
The technical problem that the present invention solves is, for the above-mentioned defect in prior art, provide a kind of electronic controller anti-reverse and anti-relay coil short-circuit control circuit, effectively protect control circuit or rear end equipment, high or low power is all applicable.
The technical solution adopted for the present invention to solve the technical problems is: form the anti-reverse and anti-relay coil short-circuit control circuit of a kind of electronic controller, comprise power supply, relay, drive circuit, switch, protection diode, protection electric capacity, divider resistance and protective resistance, described power supply comprises positive source and power cathode; Described relay has coil anode, coil negative terminal, common port, normal-closed end and normal beginning; Described drive circuit forms by driving triode, and described driving triode comprises the first driving triode and second and drives triode; Described protection diode comprises the first protection diode, the second protection diode, the 3rd protection diode, the 4th protection diode, the 5th protection diode, the 6th protection diode, the 7th protection diode, the 8th protection diode and the 9th protection diode; Described divider resistance comprises the first divider resistance and the second divider resistance; Described protective resistance comprises the first protective resistance, the second protective resistance and the 3rd protective resistance.
The positive port of described coil connects the negative pole of the 6th protection diode, the negative pole and second of the 4th protection diode drives the collector electrode of triode, described coil negative terminal mouth to connect positive pole and the power cathode of the 6th protection diode.
Described second drives the emitter of triode and one end of the second divider resistance, the negative pole of the 9th protection diode, the negative pole of the 5th protection diode is connected with protection electric capacity one end, the 9th protection positive pole of diode is connected with the Chang Kaiduan of relay, the protection electric capacity other end is connected with the 5th protection diode cathode, 5th protection diode cathode protects diode one end to be connected with first protective resistance one end and second, the first protective resistance other end is connected with switch one end with second protective resistance one end, the switch other end is connected with positive source, the second protective resistance other end and first protects diode cathode and the 3rd to protect diode cathode to be connected, first protection diode cathode and second protects the diode other end to be connected with power cathode.
Described second drives the base stage of triode to be connected with one end of the first divider resistance with the second divider resistance other end, the first divider resistance other end and first drives the collector electrode of triode to be connected, and first drives the emitter of triode to be connected with power cathode with resistance R6 one end.
Described first drives the base stage and the 8th of triode to protect diode cathode to be connected; 8th protection diode cathode connects the 7th protection diode cathode, the resistance R6 other end, the 4th protection diode cathode and the 3rd protection diode cathode; 7th protection diode cathode is connected with the 3rd protective resistance one end, and the 3rd protective resistance other end is connected with control end.
Described second protection diode
,second protection diode is two-way transient peak absorption tube, if when effect is to there is surge and Rapid pulses of electricity group, absorbs instant high-voltage, protective circuit.
Described first protection diode is 4.7V voltage-stabiliser tube; if there is surge or Rapid pulses of electricity group; although two-way transient peak absorption tube absorbs instant high-voltage; but still there is a very high voltage in the junction of the first protective resistance and the second protective resistance; now first protect diode by its clamper at about 4.7V, thus protective circuit.
Described 3rd protection diode; if during switch external parallel connection inductive load; negative voltage is produced in the moment of switch circuit breaking; 8th protection diode cathode voltage can be dragged down; the first driving triode is caused not work; namely relay disconnects, and the 3rd protection diode can prevent this negative voltage from being dragged down by the 8th protection diode cathode voltage.
When after switch circuit breaking; it is low level that master chip MCU monitors switching signal; there is provided high level signal through the 3rd protective resistance, the 7th protection diode, the 8th protection diode by MCU; maintaining first drives triode and second to drive the unlatching of triode; electric current drives triode to enter relay by VBAT through the 9th protection diode and second; maintain relay adhesive, realize the function of time delay power down.VBAT is back-end circuit power supply;
When relay coil short circuit, RLY-ON current potential is 0V, 4th protection diode and the 8th protection diode cathode are clamped to 0.7V, therefore first transistor base current potential is driven to be clamped to 0V, first drives triode and second to drive triode to turn off, thus prevent from, because the big current that relay coil short circuit causes damages second drive triode, realizing relay coil short-circuit protection function; RLY-ON is relay coil positive pole.
Described 5th protection diode and the 9th protection diode, its act as or relation, make relay before adhesive by power drives, driven by VBAT after powering on.VBAT is back-end circuit power supply;
Described 6th protection diode, be afterflow effect, the negative voltage produced when preventing relay from disconnecting drives triode to puncture by second.
Described 7th protection diode, if when effect is to there is high voltage, prevents it from instead filling with to control chip, cause control chip to damage.
When power positive cathode reversal connection.Positive source and first protects diode cathode to be connected, and arrives power cathode through the second protective resistance, and the 3rd protection diode and the 4th protection diode then block other loop of electric current; avoid causing circuit to damage; relay coil no current passes through, relay not adhesive, realizes anti-reverse function.
Enforcement the invention has the beneficial effects as follows: prevent reverse power connection, prevent relay coil short circuit, time delay power down, against short-circuit and anti-reverse low and high level output function can be realized after simplifying circuit, loss-free waking up and sleep mode can be realized, voltage (peak value, open circuit) can be met: line/ground is 1 kV, line/line is the surge anti-interference test of 0.5 kV, also can meet voltage peak (open circuit): power line is 2kV(line/ground) burst duration: 15 ms; Electricity fast-pulse group immunity experiment.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present invention.
Fig. 2 is the circuit theory diagrams after simplification of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described, as shown in Figure 1:
RL is relay; Q1 is the first driving triode (NPN pipe), and Q2 is the second driving triode (PNP pipe); D1 is the first protection diode (4.7V voltage stabilizing didoe), D2 is the second protection diode (two-way transient peak absorption tube), D3 is the 3rd protection diode, D4 is the 4th protection diode, D5 is the 5th protection diode, and D6 is the 6th protection diode, and D7 is the 7th protection diode, D8 is the 8th protection diode, and D9 is the 9th protection diode; C1 is protection electric capacity (102/2KV); R1 is the first protective resistance (5), and R2 is the second protective resistance (1K), R3 is the 3rd protective resistance (1K), and R4 is the first divider resistance (5.1K), R5 is the second divider resistance (10K); PTx is control signal; VBAT is back-end circuit power supply.
Anti-reverse and the anti-relay coil short-circuit control circuit of electronic controller of the present invention without any abnormal time, circuit normally powers on, after switch is closed, signal enters from switch, through R1, D5 to the emitter of triode Q2, another road of signal through R2 and voltage-stabiliser tube D1, then through D3, D8 to the base stage of triode Q1, make Q1 triode ON, thus the base stage of Q2 is low level, make triode Q2 conducting, electric current forms loop, control relay adhesive, back-end circuit or device power.
Time delay power down function of the present invention, when MCU detects that switching signal is low level, the control mouth of MCU produces the unlatching that high level signal maintains triode Q1, relay is powered by VBAT, electric current enters relay through D9, Q2, reach the object of delay cut-off, data when control circuit or rear end equipment work are stored, prevent loss of data, can control to wake up and dormancy by switch simultaneously, because when switch disconnects, power unit does not have load to connect, so there is not loss phenomenon in power supply.
Relay coil short-circuit protection function of the present invention: when relay coil short circuit; namely when RLY-ON current potential is 0V; D4 and D8 anodic potentials can be caused to be pulled to about 0.7V, and therefore Q1 base potential is that 0V, Q1 pipe turns off; Q2 pipe turns off; Q2 can not overcurrent damage, thus protection power source and control circuit, the benefit of this design is; when control chip does not work, inherently can be reached the effect of protection by circuit.
Anti-reverse function of the present invention, when power positive cathode connects inverse time, relay not adhesive, positive source is connected with the positive pole of D1, through R2 to ground, and separately lead up to D3 and D4 and make its nonpassage, relay coil no current passes through, thus relay not adhesive, ensure control circuit or rear end equipment not damaged.
Be illustrated in figure 2 the anti-reverse and anti-relay coil short-circuit control circuit of electronic controller of the present invention simplify after circuit theory diagrams.
Circuit after the present invention simplifies can realize against short-circuit and anti-reverse low and high level output function.When control pin PTx is high level, the conducting of Q1 pipe, the base stage of Q2 is that voltage drags down, and the conducting of Q2 pipe, exports as VRLY.
Against short-circuit function: if output pin is ground, D3 is 0.7V just very, such Q1 pipe turns off, and Q2 pipe turns off, thus power supply will short circuit cause power supply, control circuit or rear end equipment to be damaged.
Anti-reverse function: when reverse power connection, owing to there is D1 and D2, cause power supply and control pin obstructed, thus protecting control chip does not damage.
The invention is not restricted to above-mentioned embody rule example, be also applicable to the occasion that other needs similar functions.
Claims (4)
1. the anti-reverse and anti-relay coil short-circuit control circuit of electronic controller, comprise power supply, relay, drive circuit, switch, protection diode, protection electric capacity, divider resistance and protective resistance, described power supply comprises positive source and power cathode; Described relay has coil anode, coil negative terminal, common port, normal-closed end and normal beginning; Described drive circuit forms by driving triode; Described driving triode comprises the first driving triode and second and drives triode; Described protection diode comprises the first protection diode, the second protection diode, the 3rd protection diode, the 4th protection diode, the 5th protection diode, the 6th protection diode, the 7th protection diode, the 8th protection diode and the 9th protection diode; Described divider resistance comprises the first divider resistance and the second divider resistance; Described protective resistance comprises the first protective resistance, the second protective resistance and the 3rd protective resistance; It is characterized in that:
The positive port of described coil connects the negative pole of the 6th protection diode, the negative pole and second of the 4th protection diode drives the collector electrode of triode, described coil negative terminal mouth to connect positive pole and the power cathode of the 6th protection diode;
Described second drives the emitter of triode and one end of the second divider resistance, the negative pole of the 9th protection diode, the negative pole of the 5th protection diode is connected with protection electric capacity one end, the 9th protection positive pole of diode is connected with the Chang Kaiduan of relay, the protection electric capacity other end is connected with the 5th protection diode cathode, 5th protection diode cathode protects diode one end to be connected with first protective resistance one end and second, the first protective resistance other end is connected with switch one end with second protective resistance one end, the switch other end is connected with positive source, the second protective resistance other end and first protects diode cathode and the 3rd to protect diode cathode to be connected, first protection diode cathode and second protects the diode other end to be connected with power cathode,
Described second drives the base stage of triode to be connected with one end of the first divider resistance with the second divider resistance other end, the first divider resistance other end and first drives the collector electrode of triode to be connected, and first drives the emitter of triode to be connected with power cathode with resistance R6 one end;
Described first drives the base stage and the 8th of triode to protect diode cathode to be connected, 8th protection diode cathode connects the 7th protection diode cathode, the resistance R6 other end, the 4th protection diode cathode and the 3rd protection diode cathode, 7th protection diode cathode is connected with the 3rd protective resistance one end, and the 3rd protective resistance other end is connected with control end;
When after switch circuit breaking, it is low level that master chip MCU monitors switching signal, there is provided high level signal through the 3rd protective resistance, the 7th protection diode, the 8th protection diode by MCU, maintaining first drives triode and second to drive the unlatching of triode, electric current drives triode to enter relay by back-end circuit power supply VBAT through the 9th protection diode and second, maintain relay adhesive, realize the function of time delay power down;
When relay coil short circuit, relay coil positive pole RLY-ON current potential is 0V, 4th protection diode and the 8th protection diode cathode are clamped to 0.7V, therefore first transistor base current potential is driven to be clamped to 0V, first drives triode and second to drive triode to turn off, thus prevent from, because the big current that relay coil short circuit causes damages second drive triode, realizing relay coil short-circuit protection function;
When power positive cathode reversal connection; positive source and first protects diode cathode to be connected; power cathode is arrived through the second protective resistance; 3rd protection diode and the 4th protection diode then block other loop of electric current; relay coil no current passes through; relay not adhesive, realizes anti-reverse function.
2. the anti-reverse and anti-relay coil short-circuit control circuit of electronic controller according to claim 1, is characterized in that, described first protection diode is voltage-stabiliser tube.
3. the anti-reverse and anti-relay coil short-circuit control circuit of electronic controller according to claim 1, is characterized in that, described second protection diode is two-way transient peak absorption tube.
4. the anti-reverse and anti-relay coil short-circuit control circuit of electronic controller according to claim 1, is characterized in that, described first drives triode to be NPN type triode, and described second drives triode to be PNP type triode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310285978.2A CN103346553B (en) | 2013-07-09 | 2013-07-09 | Anti-reverse and the anti-relay coil short-circuit control circuit of a kind of electronic controller |
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| CN201310285978.2A CN103346553B (en) | 2013-07-09 | 2013-07-09 | Anti-reverse and the anti-relay coil short-circuit control circuit of a kind of electronic controller |
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| CN103346553B true CN103346553B (en) | 2015-10-21 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104477043B (en) * | 2014-11-14 | 2016-06-22 | 中国北车集团大连机车车辆有限公司 | City rail vehicle DC source time delay power supply circuits |
| CN105857215B (en) * | 2016-04-21 | 2017-11-14 | 中国北方车辆研究所 | Vehicular control unit power supply reverse connection protection and power down post processing circuitry |
| CN107613201A (en) * | 2017-09-13 | 2018-01-19 | 苏州科可瑞尔航空技术有限公司 | Image capturing system |
| CN114068248B (en) * | 2020-08-05 | 2024-08-09 | 广州贵冠科技有限公司 | Delay circuit and method for reducing relay actuation |
| CN113629661B (en) * | 2021-09-16 | 2023-07-21 | 中国北方发动机研究所(天津) | Heavy-current reverse connection preventing and short-circuit self-recovery power supply circuit |
| CN114597853A (en) * | 2022-03-07 | 2022-06-07 | 潍柴动力股份有限公司 | Wake-up short-circuit protection circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1713477A (en) * | 2004-06-15 | 2005-12-28 | 江苏苏亚机电制造有限公司 | Controller of outputting circuit for relay |
| CN201011705Y (en) * | 2006-12-20 | 2008-01-23 | 张忠平 | Brushless DC motor circuit for preventing power supply reverse connection |
| DE202011004621U1 (en) * | 2011-03-30 | 2011-11-02 | Andreas Heublein | Electromechanical safety circuit for solar systems |
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2013
- 2013-07-09 CN CN201310285978.2A patent/CN103346553B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1713477A (en) * | 2004-06-15 | 2005-12-28 | 江苏苏亚机电制造有限公司 | Controller of outputting circuit for relay |
| CN201011705Y (en) * | 2006-12-20 | 2008-01-23 | 张忠平 | Brushless DC motor circuit for preventing power supply reverse connection |
| DE202011004621U1 (en) * | 2011-03-30 | 2011-11-02 | Andreas Heublein | Electromechanical safety circuit for solar systems |
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Denomination of invention: An electronic controller anti reverse connection and anti relay coil short circuit control circuit Effective date of registration: 20230831 Granted publication date: 20151021 Pledgee: Agricultural Bank of China Limited Zaozhuang Yicheng sub branch Pledgor: Zaozhuang Kaibo Port Co.,Ltd. Registration number: Y2023980054891 |
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