CN109755926A - Bullet train distribution board and headlamp combined power supply system dash current protective device - Google Patents
Bullet train distribution board and headlamp combined power supply system dash current protective device Download PDFInfo
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- CN109755926A CN109755926A CN201910221038.4A CN201910221038A CN109755926A CN 109755926 A CN109755926 A CN 109755926A CN 201910221038 A CN201910221038 A CN 201910221038A CN 109755926 A CN109755926 A CN 109755926A
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- 230000001681 protective effect Effects 0.000 title claims abstract description 20
- 230000003111 delayed effect Effects 0.000 claims abstract description 16
- 230000000452 restraining effect Effects 0.000 claims abstract description 16
- 239000003990 capacitor Substances 0.000 claims description 15
- 230000005611 electricity Effects 0.000 claims description 4
- 230000001960 triggered effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000002411 adverse Effects 0.000 abstract description 2
- 230000002045 lasting effect Effects 0.000 abstract description 2
- 238000012546 transfer Methods 0.000 abstract description 2
- 238000013519 translation Methods 0.000 abstract description 2
- 238000005286 illumination Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
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- 101000752245 Homo sapiens Rho guanine nucleotide exchange factor 5 Proteins 0.000 description 1
- 102100021688 Rho guanine nucleotide exchange factor 5 Human genes 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
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- 238000000034 method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
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- 230000001629 suppression Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The invention belongs to electronic circuit fields; the dash current of component is inhibited to protect circuit applied to Antisurge current in bullet train distribution board and headlamp combined power supply system more particularly to a kind of; delay circuit trigger timing in delayed control circuit of the present invention; output end level translation after the time of delay setting; relay is set to work; and then it controls relay controlled switch and triggers short-circuit Inrush current restraining resistance; to avoid resistance because lasting access causes to generate heat, system transfer efficiency and reliability are reduced.In the increased dash current protective device of the present invention, the time of internal delay time module is set as mS grade, looks to the Jia Shi of driver, with comparison before rectification, will not have adverse effect on.
Description
Technical field
The invention belongs to electronic circuit fields, and in particular to one kind is applied to bullet train distribution board and combines electricity with headlamp
Antisurge current inhibits the dash current of component to protect circuit in the system of source.
Background technique
The input terminal of train illumination integrated drive generator is filtered using the electrolytic capacitor of high voltage large capcity and energy storage, logical
Electric booting moment, since the voltage original state of electrolytic capacitor is zero volt, train illumination integrated drive generator input terminal occurs of short duration
" imaginary short state ", causes the starup current of train illumination integrated drive generator especially big, as shown in Figure 1, it can be to prime for Denso
It sets and generates a big rush of current.Very short heavy current pulse of this duration, can make power supply unit to train illumination group
Semiconductor devices, relay switch contacts oxidation life in conjunction power filter electrolytic capacitor charge circuit reduce, and lead to failure
Rate increases reliability reduction.
In conjunction with practical feedback problem after sale, the conclusion of investigation: MLpR1 relay contact adhesion leads to headlamp, tail portion mark
Will lamp is lighted simultaneously, and MLpR1 relay contact adhesion is the frequent power on/off due to feeder ear, is caused in headlamp integrated drive generator
The Antisurge current in portion inhibits component: the thermistor of NTC negative temperature coefficient is constantly in hot, internal resistance very little, Bu Nengqi
To electric current inhibiting effect, as shown in Figure 2.
Starup current inhibits principles illustrated: headlamp integrated drive generator has booting dash current (Inrush-Current) suppression
Circuit design processed, inside be made of 6 standard monomer power module 150W 110Vdc-24Vdc, each standard monomer power supply
Module design boots up booting dash current using NTC thermistor and inhibits.
Summary of the invention
In order to overcome drawbacks described above, the present invention provides one kind and is suitable for bullet train distribution board and headlamp integrated drive generator system
The dash current protective device of the high reliability of system realizes under frequent power on/off operating condition, and the dash current that is switched on is maintained at
Pre-set current value is hereinafter, improve train illumination Problem of System Reliability.
To achieve the above object, the technical solution of the present invention is as follows:
A kind of bullet train distribution board and headlamp combined power supply system dash current protective device, the headlamp combination
The power input of power-supply system is equipped with Inrush current restraining resistance, is equipped with dash current and protects circuit comprising:
Relay, the controlled switch and Inrush current restraining resistance of the relay form parallel-connection structure, and open controlled
Close short-circuit Inrush current restraining resistance after triggering；
Delayed control circuit, for controlling triggering and the triggered time of relay controlled switch；
Accessory power supply, for providing in due course power supply for relay and delayed control circuit after powering on；
The power input of the input terminal connection headlamp combined power supply system of the accessory power supply.
As further elaboration of the invention: the delayed control circuit includes control relay controlled switch touching
Send out the delay circuit module of time and the trigger circuit of control relay controlled switch triggering.
As the preferred embodiment of the present invention: the trigger circuit includes the first triode, the output of the accessory power supply
It holds, the control circuit of relay is connected with the collector of the first triode；The output end of the delay circuit module and the one or three
The base stage of pole pipe Q1 is connected；The emitter of first triode is grounded.Circuit composed structure, Er Qietong are not only simplified in this way
Crossing control low and high level realizes the low voltage control of relay.
In order to improve the stability for powering on rear accessory power supply power supply, and in order to preferably be adapted to electronic circuit, the auxiliary
Anti-reverse diode and multiple groups current-limiting resistance in parallel are in series between power supply and the power input of headlamp combined power supply system.
Equipped with on-delay capacitor, the cathode of the on-delay capacitor is grounded, the anode of the on-delay capacitor with
The input terminal of delayed control circuit is connected, while the anode of on-delay capacitor passes through resistor and headlamp integrated drive generator
The power input of system is connected.
In order to improve the reliability and stability of protection, the dash current protection circuit is equipped with two groups, every group by after
The controlled switch and Inrush current restraining resistance of electric appliance form parallel-connection structure.
The operation principle of the present invention is that:
1, for the present invention when powering on, the power supply of car body current supply circuit gives rear class headlamp group by Inrush current restraining resistance
Power-supply system power supply is closed, internal electrolytic capacitor enters current-limiting charge state.
2, when powering on, the power supply of car body power supply current supply circuit gives the accessory power supply inside dash current protective device simultaneously
Power supply, accessory power supply by multiple groups parallel connection current-limiting resistance charge it is electric after, generation 12V steady dc voltage.
3, it after accessory power supply generates DC voltage, powers to delayed control circuit, in delayed control circuit
Delay circuit trigger timing, output end level translation, makes relay work after the time for the setting that is delayed, so control after
Electric appliance controlled switch triggers short-circuit Inrush current restraining resistance, to avoid resistance because lasting access causes to generate heat, reduces system
Transfer efficiency and reliability.
In the increased dash current protective device of the present invention, the time of internal delay time module is set as mS grade, to department
The Jia Shi of machine is looked at, and with comparison before rectification, will not be had adverse effect on.
Detailed description of the invention
Fig. 1 is the functional block diagram of headlamp combined power supply system.
Fig. 2 is Inrush current restraining component-thermistor NTC working principle diagram.
Fig. 3 is dash current protective device of the present invention.
Specific embodiment
In order to deepen the understanding of the present invention, the present invention is done below in conjunction with drawings and examples and is further retouched in detail
It states.
Embodiment 1:
The dash current protective device for the Inrush current restraining resistance that the present embodiment is related to specifically applies to bullet train and matches
In electroplax and headlamp combined power supply system；It connects access between headlamp distribution board and headlamp integrated drive generator.
The dash current protective device that the present embodiment is related to includes: relay, the controlled switch and surge of the relay
Electric current inhibits resistance to form parallel-connection structure, and the short-circuit Inrush current restraining resistance after controlled switch triggering；Delayed control
Circuit, for controlling triggering and the triggered time of relay controlled switch；Accessory power supply, for being relay and powering on after powering on
Delay control circuit provides in due course power supply；The power input of the input terminal connection headlamp combined power supply system of the accessory power supply
End.
As shown in Figure 3: controlled switch, that is, normal open switch of relay J1 is connect with Inrush current restraining resistor coupled in parallel.
As shown in Figure 3: delayed control circuit includes delay circuit module and trigger circuit；Trigger circuit includes first
Triode Q1, the output end of the accessory power supply, the control terminal of relay J1 are connected with the collector of the first triode Q1；It is described
The output end of delay circuit module is connected with the base stage of the first triode Q1；The emitter of the first triode Q1 is grounded.When
After delay circuit module TIM1 timing, the level of the output end of delay circuit module switchs to high level by low level, makes
One triode Q1 work conducting is attracted so that the control terminal of relay be made to run control relay, is closed normally opened contact
The Inrush current restraining resistance of short-circuit parallel connection therewith.
As shown in Figure 3: its output end of accessory power supply PWR1 generates 12V steady dc voltage, mentions for delay circuit module
Power supply source；The input terminal of accessory power supply is by anti-reverse diode D1 and three current-limiting resistances R1, R2, R3 parallel with one another with before
The power input of illuminator combined power supply system is connected, thus car body current supply circuit power supply to headlamp combined power supply system
When power supply, in due course power supply can be generated in time, provided safeguard for the operation of circuit.
It is as shown in Figure 3: to be equipped with on-delay capacitor C3, the cathode of the on-delay capacitor C3 is grounded, on-delay electricity
The anode for holding C3 is connected with the input terminal of delayed control circuit, while the anode of on-delay capacitor C3 passes through concatenated two
A resistance R7, R9 are connected with the power input of headlamp combined power supply system.
As shown in Figure 3: the present embodiment provides two groups of dash currents protection electricity to improve the reliability of protective device
The structure and working principle on road, two groups of protection circuits is substantially the same in addition to the delay time that delay circuit generates is different.This reality
It applies in example after first group of dash current protection circuit delay about 30mS, into steady state operating mode；Second group of dash current protection
Unit is delayed after about 100mS, into steady state operating mode.Therefore it only can just be lost in the case that two groups of protection locations fail simultaneously
Effect, to improve the reliability of protection circuit.
The time of the present embodiment internal delay time module is set as mS grade, and it is unfavorable to generate to the Jia Shi lookout of driver
It influences.
Using after this protection circuit in headlamp combined power supply system, detection data is as follows by contrast:
When not increasing protective device, dash current measured waveform, current maxima 48.4A, electric current pulsewidth are inputted
5mS；After increasing dash current protective device, input dash current is limited in 10A hereinafter, electric current pulsewidth 46mS.
Simultaneously after using dash current protective device, after the relay in headlamp distribution board adds up on-off 201849 times
And it is so working properly, the service life is 20 times originally.
Accessory power supply and delay circuit module involved in this embodiment are all general module circuit, as long as meeting front and back
Connection request can be used, and discussion is no longer developed in details in the present invention.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure transformation made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant technical fields,
Similarly it is included within the scope of the present invention.
Claims (6)
1. a kind of bullet train distribution board and headlamp combined power supply system dash current protective device, the headlamp combination electricity
The power input of source system is equipped with Inrush current restraining resistance, it is characterised in that: is equipped with dash current and protects circuit, packet
It includes:
Relay, the controlled switch and Inrush current restraining resistance of the relay form parallel-connection structure, and touch in controlled switch
Short-circuit Inrush current restraining resistance after hair；
Delayed control circuit, for controlling triggering and the triggered time of relay controlled switch；
Accessory power supply, for providing in due course power supply for relay and delayed control circuit after powering on；
The power input of the input terminal connection headlamp combined power supply system of the accessory power supply.
2. dash current protective device according to claim 1, it is characterised in that: the delayed control circuit includes
Control the delay circuit module in relay controlled switch triggered time and the trigger circuit of control relay controlled switch triggering.
3. dash current protective device according to claim 2, it is characterised in that: the trigger circuit includes the one or three pole
Pipe, the output end of the accessory power supply, the control circuit of relay are connected with the collector of the first triode；The delay circuit
The output end of module is connected with the base stage of the first triode；The emitter of first triode is grounded.
4. dash current protective device according to claim 1, it is characterised in that: the accessory power supply is combined with headlamp
Anti-reverse diode and more current-limiting resistances in parallel are in series between the power input of power-supply system.
5. dash current protective device according to claim 1, it is characterised in that: it is equipped with on-delay capacitor, it is described logical
The cathode of electric delay capacitor is grounded, and the anode of the on-delay capacitor is connected with the input terminal of delayed control circuit, together
When on-delay capacitor anode be connected with the power input of headlamp combined power supply system by resistor.
6. dash current protective device according to claim 1, it is characterised in that: rush equipped with two groups of delay times are different
Current protecting circuit is hit, every group forms parallel-connection structure by the controlled switch and Inrush current restraining resistance of relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910221038.4A CN109755926A (en) | 2019-03-22 | 2019-03-22 | Bullet train distribution board and headlamp combined power supply system dash current protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910221038.4A CN109755926A (en) | 2019-03-22 | 2019-03-22 | Bullet train distribution board and headlamp combined power supply system dash current protective device |
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| Publication Number | Publication Date |
|---|---|
| CN109755926A true CN109755926A (en) | 2019-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910221038.4A Pending CN109755926A (en) | 2019-03-22 | 2019-03-22 | Bullet train distribution board and headlamp combined power supply system dash current protective device |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1564504A (en) * | 1975-08-23 | 1980-04-10 | British Leyland Cars Ltd | Headlamp control system |
| JPH10143259A (en) * | 1996-11-08 | 1998-05-29 | Nec Corp | Rush current preventing circuit |
| CN201439976U (en) * | 2009-05-25 | 2010-04-21 | 广东志高空调有限公司 | Suppressing circuit of surge current of inverter air conditioner |
| CN102651605A (en) * | 2012-03-27 | 2012-08-29 | 深圳市朗科电器有限公司 | Method for preventing large current impact during electrification |
| CN102931647A (en) * | 2011-08-10 | 2013-02-13 | 海洋王照明科技股份有限公司 | Surge current suppression circuit and lamp |
| CN104104075A (en) * | 2013-04-11 | 2014-10-15 | 海洋王（东莞）照明科技有限公司 | Anti-surge circuit |
| CN206164085U (en) * | 2016-10-26 | 2017-05-10 | 武汉永力科技股份有限公司 | Direct -current input surge suppression circuit |
| CN209375127U (en) * | 2019-03-22 | 2019-09-10 | 常州市赛尔交通器材有限公司 | Bullet train distribution board and headlamp combined power supply system dash current protective device |
-
2019
- 2019-03-22 CN CN201910221038.4A patent/CN109755926A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1564504A (en) * | 1975-08-23 | 1980-04-10 | British Leyland Cars Ltd | Headlamp control system |
| JPH10143259A (en) * | 1996-11-08 | 1998-05-29 | Nec Corp | Rush current preventing circuit |
| CN201439976U (en) * | 2009-05-25 | 2010-04-21 | 广东志高空调有限公司 | Suppressing circuit of surge current of inverter air conditioner |
| CN102931647A (en) * | 2011-08-10 | 2013-02-13 | 海洋王照明科技股份有限公司 | Surge current suppression circuit and lamp |
| CN102651605A (en) * | 2012-03-27 | 2012-08-29 | 深圳市朗科电器有限公司 | Method for preventing large current impact during electrification |
| CN104104075A (en) * | 2013-04-11 | 2014-10-15 | 海洋王（东莞）照明科技有限公司 | Anti-surge circuit |
| CN206164085U (en) * | 2016-10-26 | 2017-05-10 | 武汉永力科技股份有限公司 | Direct -current input surge suppression circuit |
| CN209375127U (en) * | 2019-03-22 | 2019-09-10 | 常州市赛尔交通器材有限公司 | Bullet train distribution board and headlamp combined power supply system dash current protective device |
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