CN102412813A - Time delay switch circuit of direct current power supply - Google Patents
Time delay switch circuit of direct current power supply Download PDFInfo
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- CN102412813A CN102412813A CN2011104214843A CN201110421484A CN102412813A CN 102412813 A CN102412813 A CN 102412813A CN 2011104214843 A CN2011104214843 A CN 2011104214843A CN 201110421484 A CN201110421484 A CN 201110421484A CN 102412813 A CN102412813 A CN 102412813A
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Abstract
The invention discloses a time delay switch circuit of a direct current power supply. The time delay switch circuit comprises an unilateral conduction protective circuit of the power supply, a surge absorption protective circuit, a power triode, a single-stage drive triode, a two-stage drive triode, a two-gear transfer switch (multi-gear transfer switch), and a time-delay charging and discharging circuit, wherein Q1, Q2 and Q3 three-stage transistor forms a main circuit of the switch circuit, and the two-stage drive triode and the power triode Q1 form a PNP composite tube; when the two-gear transfer switch is rotated into conduction or non-conduction, a charging and discharging capacitor C2 is respectively and quickly in charging and slowly in discharging, and the composite tube is controlled by the base electrode of the single-stage drive triode to be rapidly switched on, and switched off with time delay; and the delay time parameters are adjustable. The time delay switch circuit of the direct current power supply provided by the invention has the advantages of simple structure, low cost, stable performance, high reliability, and can be directly embedded into printed circuit boards of various electronic equipment, instruments or devices.
Description
Technical field
The present invention relates to the electronic technology field of DC power supply delay switch circuit, be particularly useful for orbit traffic direct current 110V power supply delay switch circuits such as locomotive, city rail, subway.
Background technology
Many DC power supply devices all need be after closing, and a period of time of delaying time is again accomplished each item work, comprises data preservation, mechanical mechanism homing etc.At present, the DC power supply delay switch that is widely used in is traditional mechanical delay switch, electronic delay switch.But all there are shortcomings such as volume is big, cost is high, reliability is lower, versatility difference, therefore are necessary to invent a kind of DC power supply delay switch circuit, directly embed in the printed circuit board (PCB) of various electronic equipments, instrument or device, improve system reliability.
In field of track traffic such as railway locomotive, city rail, subways, most of equipment and instrument adopt locomotive 110V DC power supply, simultaneously many instrument and equipments disconnection direct current power source supplying power of need delaying time.Like: electronic windshield wiper after many gears change over switch is converted to stop position, must wait for that the windshield wiper scraping arm is got back to assigned address and stopped after, can break off DC power supply.Otherwise, if moment deenergization, can stop driver's sight line; Perhaps rotate to position of rest earlier, wait for that scraping arm stops after, deenergization complex operation then then.
Summary of the invention
The objective of the invention is to, overcome that present DC power supply delay switch volume is big, cost is high, reliability is lower, the deficiency of versatility difference, provide a kind of simple in structure, low, the stable performance of cost, the DC power supply delay switch that reliability is high.
Technical scheme of the present invention is: invent a kind of DC power supply delay switch circuit, after the second gear position conversion switch rotates to stop position, time-delay a period of time (2-2000 second), break off DC power supply then.Otherwise after the second gear position conversion switch rotated to run location, delay switch circuit was connected working power at once.
A kind of DC power supply delay switch circuit comprises power supply unilateal conduction protective circuit, and surge absorbs protective circuit; Pliotron, one-level drives triode, secondary drive triode; Second gear position conversion switch (many gears change over switch), time-delay charge and discharge capacitance and charge-discharge circuit thereof.
Said DC power supply unilateal conduction protective circuit is composed in parallel by D1, D2.Surge absorbs protective circuit by piezo-resistance UR1, and two-way Transient Suppression Diode D7 one end connects power supply unilateal conduction protective circuit, a termination power negative pole.
Said secondary drive triode Q2 and pliotron Q1 form the positive-negative-positive multiple tube; The emitter of multiple tube connects input power surge and absorbs protective circuit; Be the main switch input; Current collection is the main switch output very, and base stage connects the collector electrode that one-level drives triode Q3 through current limliting biasing resistor R5.The base stage that one-level drives triode Q3 connects time-delay charge and discharge capacitance C2 through discharge resistance R4, and emitter is connected with power cathode through diode D6.
Said second gear position conversion switch (many gears change over switch) S1 common port connects power cathode, and end of convert is stopping port and moving between the port and change.The voltage-stabiliser tube D4 of reversal connection is stopping between port and the power cathode, and power supply is through power resistor R1, diode D3 connection stopping port.Power supply connects time-delay charge and discharge capacitance C2 through power resistor R1, diode D5, and resistance R 3 is parallelly connected with D5.
The said second gear position conversion switch of DC power supply delay switch circuit (many gears change over switch) is when S1 is in stop position: stop the direct ground connection of port; The anodal current potential of time-delay charge and discharge capacitance C2 is forced to by S1 and is lower than 0.7V, and one-level drives triode Q3 and reliably ends.Secondary drive triode Q2 and pliotron Q1 and composition positive-negative-positive multiple tube are also by breaking off.
Said DC power supply delay switch circuit opening process: when second gear position conversion switch (many gears change over switch) S1 rotated to the operation port, power supply was connected to form the RC charge circuit through power resistor R1 diode D5 to time-delay charge and discharge capacitance C2.C2 two ends charging rapidly make one-level drive triode Q3 saturation conduction, drag down the Q3 collector potential.Multiple tube Q1, Q2 export the 110V power supply because base potential reduces and saturation conduction, and switching circuit is opened.Capacitor C 2 continues charging until the stable voltage near voltage stabilizing didoe.
Said DC power supply delay switch circuit turn off process: second gear position conversion switch (many gears change over switch) S1 rotates to when stopping port; Time-delay charge and discharge capacitance C2 forms discharge loop 1 through emitter junction, the diode D6 that resistance R 4, one-level drive triode Q3, and the charge and discharge capacitance C2 that delays time simultaneously forms discharge loop 2 through resistance R 3, diode D3, second gear position conversion switch (many gears change over switch) S1.Capacitor C 2 drives triode Q3 reliably by breaking off by the stable voltage RC discharge of voltage stabilizing didoe until one-level, and the Q3 collector electrode becomes high potential, and multiple tube Q1, Q2 break off the output of 110V power supply because of ending.
Advantage of the present invention:
The DC power supply delay switch circuit overcomes that present DC power supply delay switch volume is big, cost is high, reliability is lower, the deficiency of versatility difference, provides a kind of simple in structure, low, the stable performance of cost, the DC power supply delay switch that reliability is high.Directly embed in the printed circuit board (PCB) of various electronic equipments, instrument or device, improve system reliability.
Fig. 1 is DC power supply delay switch circuit (a second gear position conversion switch).
Fig. 2 is a locomotive windshield wiper DC power supply delay switch circuit.
Embodiment
In conjunction with accompanying drawing and instance the present invention is further specified as follows:
As shown in Figure 1, surge formula piezo-resistance UR1, two-way Transient Suppression Diode D7 form surge and absorb protective circuit, absorb and suppress spike and surge pulse, protection back level electronic device.UR1 selects 20D220K for use, and D7 is 5KP180CA.Polystyrene capacitor C 1 is carried out power frequency, High frequency filter.
As shown in Figure 1, form switching circuit by 3 grades of transistors.Secondary drive triode Q2 and pliotron Q1 and composition positive-negative-positive multiple tube.Pliotron Q1 selects PNP pipe 2SA1943, maximal work voltage VCEO=-230V, VCBO=-230V, IC=-15A, PC=150W, hFE=55 ~ 160 for use.Secondary drive triode Q2 selects PNP pipe 2SA92, maximal work voltage VCEO=-300V, VCBO=-300V, ICM=-0.5A, hFE=80 ~ 250 for use.The base stage that one-level drives triode Q3 connects time-delay charge and discharge capacitance C2 through discharge resistance R4, and emitter is connected with ground through diode D6.One-level drives triode Q3 and selects NPN planar expitaxial transistor MIE13001 for use, maximal work voltage VCEO=400V, VCBO=500V, ICM=0.3A, PC=7W, hFE=10 ~ 40.All bipolar devices all meet operating voltage, current requirements.Fig. 1 circuit Maximum Power Output can reach 1000W, can expand power output and delay time behind the modification transistor parameter.
Said second gear position conversion switch (many gears change over switch) S1 common end grounding, end of convert is stopping port and is moving between the port and change.The voltage-stabiliser tube D4 of reversal connection is stopping between port and the ground, and power supply is through power resistor R1, diode D3 connection stopping port.
The said second gear position conversion switch of DC power supply delay switch circuit (many gears change over switch) is when S1 is in stop position: stop the direct ground connection of port; The anodal current potential of time-delay charge and discharge capacitance C2 is forced to by S1 and is lower than 0.7V, and one-level drives triode Q3 and reliably ends.Secondary drive triode Q2 and pliotron Q1 and composition positive-negative-positive multiple tube are also by breaking off.Diode D6 raises Q3 emitter current potential, prevents that Q3 from misleading.
Said DC power supply delay switch circuit opening process: when second gear position conversion switch (many gears change over switch) S1 rotated to the operation port, power supply was connected to form the RC charge circuit through power resistor R1 diode D5 to time-delay charge and discharge capacitance C2.C2 two ends charging rapidly make one-level drive triode Q3 saturation conduction, drag down the Q3 collector potential.Multiple tube Q1, Q2 export the 110V power supply because base potential reduces and saturation conduction, and switching circuit is opened.Simultaneously, capacitor C 2 continues charging until the stable voltage near voltage stabilizing didoe D4, and voltage stabilizing didoe D4 plays the voltage clamp position and drives triode Q3 with the protection one-level, and D4 selects 1N4744 for use.
Said DC power supply delay switch circuit turn off process: second gear position conversion switch (many gears change over switch) S1 rotates to when stopping port; Time-delay charge and discharge capacitance C2 forms discharge loop 1 through emitter junction, the diode D6 that resistance R 4, one-level drive triode Q3, and the charge and discharge capacitance C2 that delays time simultaneously forms discharge loop 2 through resistance R 3, diode D3, second gear position conversion switch (many gears change over switch) S1.Capacitor C 2 drives triode Q3 reliably by breaking off by the stable voltage RC discharge of voltage stabilizing didoe until one-level, and the Q3 collector electrode becomes high potential, and multiple tube Q1, Q2 break off the output of 110V power supply because of ending.Diode D5 effect is the C2 quick charge, and discharge ends, and prolongs discharge delay time.
Said DC power supply delay switch circuit can be used in 110V after carrying out the replacing of part component parameter, during the side circuit of maximum power 5KW is used.
As shown in Figure 2; Be the instance 2 of this DC power supply delay switch circuit, be successfully applied in the railway locomotive windshield wiper control system, realize that 4 gear change over switch S1 rotate to position of rest after; The power supply of windshield wiper controller is broken off in time-delay, guarantees that the windshield wiper scraping arm can playback.
Windshield wiper 4 gear change over switches to intermittently, when rotating to stop position with fast state at a slow speed, stop position is connected ground, charge and discharge capacitance C2 discharges at a slow speed, be set to 10 seconds the discharge time of breaking off the 110V power supply until the multiple tube switch.Microcontroller detects P1_0 signal step-down, and the control scraping arm continues operation, and the position signalling that detects the scraping arm playback simultaneously is after detecting the home position signal, and scraping arm stops.Amount to after 10 seconds, windshield wiper controller system power supply breaks off.Have only the DC power supply delay switch circuit charged, protected other circuit of controller, prolong complete machine useful life.
Should be pointed out that for the present invention to have the embodiment of multiple conversion and modification, be not limited to the instantiation of above-mentioned execution mode through proving absolutely.Above-mentioned instance is as just explanation of the present invention, rather than restriction.In a word, which conspicuous to those skilled in the art conversion is protection scope of the present invention comprise or substitute and remodeling.
Claims (8)
1. a DC power supply delay switch circuit comprises DC power supply, power switch, power output end, it is characterized in that: power supply unilateal conduction protective circuit; Surge absorbs protective circuit; Pliotron, one-level drives triode, secondary drive triode; Second gear position conversion switch (many gears change over switch), the time-delay charge-discharge circuit.
2. DC power supply delay switch circuit according to claim 1 is characterized in that power supply unilateal conduction protective circuit is composed in parallel by D1, D2.
3. surge absorbs protective circuit by piezo-resistance UR1, and two-way Transient Suppression Diode D7 one end connects power supply unilateal conduction protective circuit, a termination power negative pole.
4. DC power supply delay switch circuit according to claim 1; It is characterized in that secondary drive triode Q2 and pliotron Q1 form the positive-negative-positive multiple tube; The emitter of multiple tube connects input power surge and absorbs protective circuit; Be the main switch input, current collection is the main switch output very, and base stage connects the collector electrode that one-level drives triode Q3 through current limliting biasing resistor R5.
5. the base stage of one-level driving triode Q3 connects time-delay charge and discharge capacitance C2 through discharge resistance R4, and emitter is connected with power cathode through diode D6.
6. DC power supply delay switch circuit according to claim 1 is characterized in that second gear position conversion switch S1 common port connects power cathode, and end of convert is stopping port and moving between the port and change.
7. the voltage-stabiliser tube D4 of reversal connection is stopping between port and the power cathode, and power supply is through power resistor R1, diode D3 connection stopping port.
8. DC power supply delay switch circuit according to claim 1 is characterized in that power supply passes through power resistor R1, diode D5 connects time-delay charge and discharge capacitance C2, and resistance R 3 is parallelly connected with D5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110421484.3A CN102412813B (en) | 2011-12-16 | 2011-12-16 | Time delay switch circuit of direct current power supply |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110421484.3A CN102412813B (en) | 2011-12-16 | 2011-12-16 | Time delay switch circuit of direct current power supply |
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| CN102412813A true CN102412813A (en) | 2012-04-11 |
| CN102412813B CN102412813B (en) | 2014-03-12 |
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| CN201110421484.3A Expired - Fee Related CN102412813B (en) | 2011-12-16 | 2011-12-16 | Time delay switch circuit of direct current power supply |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117092A (en) * | 2012-12-27 | 2013-05-22 | 北京北大众志微系统科技有限责任公司 | Digital delay chain calibration method |
| CN104218926A (en) * | 2014-09-01 | 2014-12-17 | 陆俊 | Force-sensitive time-delay switch control circuit |
| CN108292919A (en) * | 2015-11-17 | 2018-07-17 | 株式会社自动网络技术研究所 | Switching circuit and power-supply system |
| CN116231607A (en) * | 2023-02-20 | 2023-06-06 | 北京中捷时代航空科技有限公司 | Transient current suppression circuit |
Citations (4)
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| CN2049051U (en) * | 1989-05-24 | 1989-12-06 | 中国瑞达系统装备公司应用电子技术研究部 | Poly-step electronic delay switch |
| CN2149725Y (en) * | 1993-01-16 | 1993-12-15 | 李力 | Electronic time-delay switch |
| CN201374684Y (en) * | 2009-04-07 | 2009-12-30 | 谷正 | Power supply delay device for vehicle power supply |
| US20110080172A1 (en) * | 2007-07-03 | 2011-04-07 | Eric Jan Banning-Geertsma | Transmitter system, method of inducing a transient electromagnetic field in an earth formation, method of obtaining a transient electromagnetic response signal, and method of producing a hydrocarbon fluid |
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2011
- 2011-12-16 CN CN201110421484.3A patent/CN102412813B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2049051U (en) * | 1989-05-24 | 1989-12-06 | 中国瑞达系统装备公司应用电子技术研究部 | Poly-step electronic delay switch |
| CN2149725Y (en) * | 1993-01-16 | 1993-12-15 | 李力 | Electronic time-delay switch |
| US20110080172A1 (en) * | 2007-07-03 | 2011-04-07 | Eric Jan Banning-Geertsma | Transmitter system, method of inducing a transient electromagnetic field in an earth formation, method of obtaining a transient electromagnetic response signal, and method of producing a hydrocarbon fluid |
| CN201374684Y (en) * | 2009-04-07 | 2009-12-30 | 谷正 | Power supply delay device for vehicle power supply |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117092A (en) * | 2012-12-27 | 2013-05-22 | 北京北大众志微系统科技有限责任公司 | Digital delay chain calibration method |
| CN103117092B (en) * | 2012-12-27 | 2015-09-23 | 北京北大众志微系统科技有限责任公司 | A kind of calibration steps of digital delay chain |
| CN104218926A (en) * | 2014-09-01 | 2014-12-17 | 陆俊 | Force-sensitive time-delay switch control circuit |
| CN108292919A (en) * | 2015-11-17 | 2018-07-17 | 株式会社自动网络技术研究所 | Switching circuit and power-supply system |
| CN108292919B (en) * | 2015-11-17 | 2022-04-29 | 株式会社自动网络技术研究所 | Switching circuit and power supply system |
| CN116231607A (en) * | 2023-02-20 | 2023-06-06 | 北京中捷时代航空科技有限公司 | Transient current suppression circuit |
| CN116231607B (en) * | 2023-02-20 | 2023-12-05 | 北京中捷时代航空科技有限公司 | Transient current suppression circuit |
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| CN102412813B (en) | 2014-03-12 |
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Effective date of registration: 20201118 Address after: Group 4, Wuxing village, Zhaxiang, Nantong City, Jiangsu Province, 226000 Patentee after: NANTONG ZHONGNAN NUMERICAL CONTROL MACHINE MADE Co.,Ltd. Address before: 412007 Zhuzhou Research Institute, Hunan University of Technology, 88 West Taishan Road, Tianyuan District, Hunan Patentee before: HUNAN University OF TECHNOLOGY |
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Granted publication date: 20140312 Termination date: 20201216 |