CN202325967U - Double-wire plug-in starting protection device - Google Patents
Double-wire plug-in starting protection device Download PDFInfo
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- CN202325967U CN202325967U CN2011203946159U CN201120394615U CN202325967U CN 202325967 U CN202325967 U CN 202325967U CN 2011203946159 U CN2011203946159 U CN 2011203946159U CN 201120394615 U CN201120394615 U CN 201120394615U CN 202325967 U CN202325967 U CN 202325967U
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Abstract
The utility model relates to a double-wire plug-in starting protection device, which belongs to the technical field of automobile ignition starting protection, and comprises a PNP (Plug N Play) triode, an N-channel MOS (Metal Oxide Semiconductor) tube, an NPN triode, resistors, capacitors, a diode and other components, wherein a grid electrode of the N-channel MOS tube is connected with the capacitor C3, the resistor R4, a collector electrode of the PNP triode and a collector electrode of the NPN triode in parallel; a drain electrode of the N-channel MOS tube is connected with an input end, and a voltage positive feedback circuit formed by the resistors R5 and R6, the capacitor C4 and the NPN triode in parallel; and a source electrode is connected with an output end. The double-wire plug-in starting protection device adopts a float design, can be directly serially connected to a positive electrode and a negative electrode of an ignition starting loop power supply so as to work, not only can switch off a power supply loop within set time, but also cannot interfere the normal operation of an ignition starting loop, and can ensure that a starter cannot be burned due to continuous switch-on under abnormal condition. The problems that: in the prior art, a protective relay is unreliable, so that the protection effect is poor, and the protective relay is not suitable for being used on middle and low-grade vehicles, are solved.
Description
Technical field
The utility model relates to a kind of two line INSERTTYPE start protection devices, belongs to automotive ignition start protection equipment technical field.
Background technique
In the vehicle launch control loop, common circuit has two kinds, and a kind of is the magnetic switch of directly controlling starter motor with ignition key, and another kind is for the control electric current that reduces ignition key has added ignition relay, controls the magnetic switch of starter motor indirectly.But these two kinds of circuit usually can be because of the ignition key switch clamping stagnation, or the ignition relay adhesion is malfunctioning, causes ignition circuit normally not break off, thereby causes starter motor to continue energising and burn, and can cause security incidents such as storage battery explosion, cable burn when serious.Investigation finds that the fault of burning that is really caused by the quality of actuating motor own only accounts for only a few.
For avoiding taking place this type of fault, some vehicle has installed the start protection circuit additional, such as on luxury bus, having installed the automobile starting motor comprehensive protector additional; On the part engineering truck, installed the starting recloser protective gear that drives with the generator signal additional; Installed built-in start protection program among the ECU in high-end vehicle additional.Present low and middle-grade vehicle also is not equipped with corresponding protective gear.
Install protective gear additional, can reduce the generation of burning the starter motor accident to a certain extent.But also there are following problems in existing protective gear technology: the one, and cost is higher, and it is big to apply difficulty; The 2nd, protective relay itself is unreliable, causes protecting effect undesirable; The 3rd, manufacturing, attaching trouble are not suitable on the numerous low and middle-grade vehicles of user, using.
Summary of the invention
The purpose of the utility model is; Providing a kind of is serially connected in the vehicle ignition control loop; Both can when breaking down, in set time, break off current supply circuit, guaranteed that starter motor can not continue to switch on and burn under abnormal conditions, and can not disturb the proper functioning of igniting start loop again; And make simply, convenient and flexible installation, working stability is reliable, and is cheap; Solve existing technology manufacture cost height, promote difficulty, cause protecting weak effect because of protective relay self is unreliable, attaching bothers, and is not suitable for two line INSERTTYPE start protection devices of problems such as on low and middle-grade vehicles, using.
The utility model is realized above-mentioned purpose through following technological scheme:
This two lines INSERTTYPE start protection device is made up of positive-negative-positive triode Q1 2N5401, N-channel MOS pipe Q2 IRF640, NPN type triode Q3 2N5551, diode D, voltage-stabiliser tube DW, resistance R 1-R6, capacitor C 1-C4, it is characterized in that: input end is through the be connected in parallel drain electrode of positive pole, resistance R 5 and N-channel MOS pipe Q2 IRF640 of diode D of lead order; Output terminal is through be connected in parallel emitter, capacitor C 4, resistance R 4, capacitor C 3, capacitor C 2, positive pole, resistance R 1 and the capacitor C 1 of voltage-stabiliser tube DW of source electrode, NPN type triode Q3 2N5551 of N-channel MOS pipe Q2 IRF640 of lead order; The be connected in parallel collector electrode of collector electrode, resistance R 4, capacitor C 3 and positive-negative-positive triode Q1 2N5401 of NPN type triode Q3 2N5551 of the grid of N-channel MOS pipe Q2 IRF640; The drain electrode of N-channel MOS pipe Q2 IRF640 is through resistance R 5 be connected in parallel resistance R 6 and capacitor C 4; The base stage of NPN type triode Q3 2N5551 is through resistance R 6 be connected in parallel resistance R 5 and capacitor C 4; The be connected in parallel negative pole of resistance R 3 and voltage-stabiliser tube DW of the base stage of positive-negative-positive triode Q1 2N5401 be connected in parallel resistance R 2, capacitor C 2, emitter; The negative pole of diode D be connected in parallel resistance R 1, resistance R 2, resistance R 3 and capacitor C 1; Resistance R 5, resistance R 6, capacitor C 4 and NPN type triode Q3 2N5551 form the voltage positive feedback circuit.
The utility model beneficial effect compared with prior art is:
This two lines INSERTTYPE start protection device is made up of elements such as N-channel MOS pipe, triode, diode, resistance, electric capacity; Adopt and design floatingly; Avoid the use of expensive P channel MOS tube, can directly be serially connected on the negative or positive electrode of ignition start ring current and work; Both can when breaking down, in set time, break off current supply circuit, and can not disturb the proper functioning of igniting start loop again, guarantee that starter motor can not switch on continuously and burn under abnormal conditions, and line construction be simple, cheap, convenient and flexible installation.Solved existing technology manufacture cost height, promoted difficulty, caused protecting weak effect because of protective relay self is unreliable, the attaching trouble is not suitable for the problem of on low and middle-grade vehicles, using.This two lines INSERTTYPE start protection device is made simple, and working stability is reliable, very is fit to be installed on the especially low and middle-grade vehicles of various vehicles and uses.
Description of drawings:
Fig. 1 is a kind of working principle circuti diagram of two line INSERTTYPE start protection devices;
Fig. 2 is the schematic representation that a kind of two line INSERTTYPE start protection devices insert igniting start loop positive source;
Fig. 3 is the schematic representation that a kind of two line INSERTTYPE start protection devices insert igniting start loop power cathode;
Fig. 4 is the schematic representation that a kind of two line INSERTTYPE start protection devices insert non-relay ignition start loop;
Fig. 5 is a kind of form structure schematic representation of two line INSERTTYPE start protection devices.
Embodiment:
A kind of two line INSERTTYPE start protection devices 1; It is made up of positive-negative-positive triode Q1 2N5401, N-channel MOS pipe Q2 IRF640, NPN type triode Q3 2N5551, diode D, voltage-stabiliser tube DW, resistance R 1-R6, capacitor C 1-C4, and input end is through the be connected in parallel drain electrode of positive pole, resistance R 5 and N-channel MOS pipe Q2 IRF640 of diode D of lead order; Output terminal is through be connected in parallel emitter, capacitor C 4, resistance R 4, capacitor C 3, capacitor C 2, positive pole, resistance R 1 and the capacitor C 1 of voltage-stabiliser tube DW of source electrode, NPN type triode Q3 2N5551 of N-channel MOS pipe Q2 IRF640 of lead order; The be connected in parallel collector electrode of collector electrode, resistance R 4, capacitor C 3 and positive-negative-positive triode Q1 2N5401 of NPN type triode Q3 2N5551 of the grid of N-channel MOS pipe Q2 IRF640; The drain electrode of N-channel MOS pipe Q2 IRF640 is through resistance R 5 be connected in parallel resistance R 6 and capacitor C 4; The base stage of NPN type triode Q3 2N5551 is through resistance R 6 be connected in parallel resistance R 5 and capacitor C 4; The be connected in parallel negative pole of resistance R 3 and voltage-stabiliser tube DW of the base stage of positive-negative-positive triode Q1 2N5401 be connected in parallel resistance R 2, capacitor C 2, emitter; The negative pole of diode D be connected in parallel resistance R 1, resistance R 2, resistance R 3 and capacitor C 1; Resistance R 5, resistance R 6, capacitor C 4 and NPN type triode Q3 2N5551 form voltage positive feedback circuit (referring to accompanying drawing 1,2,3,4,5).
Through design floatingly, solved the powerup issue of metal-oxide-semiconductor grid, when selecting metal-oxide-semiconductor; Need not be confined to a kind of polarity; This example for example, no matter the positive pole or the negative pole of control load all can be selected the numerous N-channel MOS pipe Q2 of model; Avoid adopting expensive P channel MOS tube, so cost performance of product is higher.
It is the series product of 2N5401 that positive-negative-positive triode Q1 can adopt model.
It is the series product of 2N5551 that NPN type triode Q3 can adopt model.
It is the series product of IRF640 that N-channel MOS pipe Q2 can adopt model.
It is the series product of 1N4000 that diode D can adopt model.
Capacitor C 1 is for there being the electric capacity of polarity, and C3 is the little tantalum electric capacity of electric leakage, and the capacity that warp repeatedly experiment showed, capacitor C 1 is when >=4.7 μ, and N-channel MOS pipe conducting effect is best.The capacity of capacitor C 3 is 2.2 μ.Capacitor C 2 is an electrodeless electric capacity with C4, and capacity is respectively 0.47 μ and 10 μ.The resistance of resistance R 1, R2 is 1M; Resistance R 3, R4, resistance be respectively 4.7k and 4.7M; The resistance of resistance R 5, R6 is respectively 20k and 3k.
During 1 work of two line INSERTTYPE start protection devices, both can be serially connected in ignition start ring current positive pole, also can be connected on the negative pole of ignition start ring current.
During normal starting: ignition switch K is closed; Input end and ignition start ring current are anodal to be connected moment; Power supply is given capacitor C 1 quick charge through diode D, faster charges for C2 through the base stage of resistance R 3 and positive-negative-positive triode simultaneously, slowly charges for C2 through R2; Because the resistance of resistance R 3 is less than resistance R 2, the electric current that flows into positive-negative-positive triode Q1 emitters through resistance R 3 is greater than the electric current that flows through base stage, positive-negative-positive triode Q1 conducting this moment; Output current gives capacitor C 3 chargings; The grid potential of N-channel MOS pipe Q2 increases this moment, gets on state, and its tube voltage drop diminishes; Input end and output terminal potential difference are diminished; Diode D ends, and capacitor C 1 continues self store charge to give capacitor C 2 and capacitor C 3 chargings through the positive-negative-positive triode, up to the voltage of capacitor C 2, the capacitor C 3 voltage stabilizing value 12V near voltage-stabiliser tube DW; At this moment positive-negative-positive triode Q1 is because the charging current of C2 reduces to 0 and get into by state; Capacitor C 3 promptly gets into the slow discharge condition that begins from 12V; N-channel MOS pipe Q2 also gets into the saturation conduction state; This moment, input end and output terminal potential difference were minimum, and the ignition start ring current is connected, the beginning proper functioning.
On the other hand; In ignition switch K closed moment; N-channel MOS pipe Q2 is not before the conducting; The pressure drop at N-channel MOS pipe Q2 two ends gives capacitor C 4 chargings through resistance R 5, and NPN type triode Q3 is not in cut-off state all the time because of there being enough base currents like this, does not influence N-channel MOS pipe Q2 normally.If the closed several seconds of ignition switch K just breaks off; That is to say in capacitor C 3 discharges and break off midway; Ignition switch K is closed once more at once then; Because of the voltage of capacitor C 3 still is enough to let N-channel MOS pipe Q2 conducting, therefore be connected in series the utility model such as same lead, the proper functioning in ignition start loop is not had a bit influence.Capacitor C 2 will be through resistance R 2 and resistance R 1 discharge after capacitor C 1 has been put electricity.After ignition switch K broke off, capacitor C 4 was discharged rapidly through the base stage of resistance R 6 and NPN type triode Q3, for starting next time is got ready.
During improper starting: ignition switch K continues closed above 20～30 seconds; Capacitor C 3 discharges into voltage when low through resistance R 4 by index law gradually, because of the voltage of capacitor C 3 that is to say the grid voltage of N-channel MOS pipe Q2, so the tube voltage drop of N-channel MOS pipe Q2 increases gradually; With triggering the voltage positive feedback circuit of forming by resistance R 5, resistance R 6, capacitor C 4 and NPN type triode Q3; NPN type triode Q3 conducting ended N-channel MOS pipe Q2 rapidly, and was locked in cut-off state this moment; This moment, input end and output terminal potential difference were very big, had promptly broken off the ignition start ring current, and the protection starter motor is not burnt.
When short-circuit conditions appears in load: such as unusual short circuit of relay coil etc.; Ignition switch K closed moment, the conduction voltage drop of N-channel MOS pipe Q2 will increase because of overcurrent is anxious, and this voltage drop can trigger the voltage positive feedback circuit of being made up of resistance R 5, resistance R 6, capacitor C 4 and NPN type triode Q3 equally; NPN type triode Q3 conducting; N-channel MOS pipe Q2 is ended, break off igniting start loop power supply, guarantee circuit safety.
Claims (1)
1. line INSERTTYPE start protection device; It is made up of positive-negative-positive triode Q1 2N5401, N-channel MOS pipe Q2 IRF640, NPN type triode Q3 2N5551, diode D, voltage-stabiliser tube DW, resistance R 1-R6, capacitor C 1-C4, it is characterized in that: input end is through the be connected in parallel drain electrode of positive pole, resistance R 5 and N-channel MOS pipe Q2 IRF640 of diode D of lead order; Output terminal is through be connected in parallel emitter, capacitor C 4, resistance R 4, capacitor C 3, capacitor C 2, positive pole, resistance R 1 and the capacitor C 1 of voltage-stabiliser tube DW of source electrode, NPN type triode Q3 2N5551 of N-channel MOS pipe Q2 IRF640 of lead order; The be connected in parallel collector electrode of collector electrode, resistance R 4, capacitor C 3 and positive-negative-positive triode Q1 2N5401 of NPN type triode Q3 2N5551 of the grid of N-channel MOS pipe Q2 IRF640; The drain electrode of N-channel MOS pipe Q2 IRF640 is through resistance R 5 be connected in parallel resistance R 6 and capacitor C 4; The base stage of NPN type triode Q3 2N5551 is through resistance R 6 be connected in parallel resistance R 5 and capacitor C 4; The be connected in parallel negative pole of resistance R 3 and voltage-stabiliser tube DW of the base stage of positive-negative-positive triode Q1 2N5401 be connected in parallel resistance R 2, capacitor C 2, emitter; The negative pole of diode D be connected in parallel resistance R 1, resistance R 2, resistance R 3 and capacitor C 1; Resistance R 5, resistance R 6, capacitor C 4 and NPN type triode Q3 2N5551 form the voltage positive feedback circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203946159U CN202325967U (en) | 2011-10-17 | 2011-10-17 | Double-wire plug-in starting protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203946159U CN202325967U (en) | 2011-10-17 | 2011-10-17 | Double-wire plug-in starting protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202325967U true CN202325967U (en) | 2012-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203946159U Withdrawn - After Issue CN202325967U (en) | 2011-10-17 | 2011-10-17 | Double-wire plug-in starting protection device |
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| Country | Link |
|---|---|
| CN (1) | CN202325967U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410123A (en) * | 2011-10-17 | 2012-04-11 | 荆州市鑫祥科技开发有限责任公司 | Double-line plug-in-type startup protector |
| CN111819648A (en) * | 2018-03-22 | 2020-10-23 | 住友电装株式会社 | Relay drive circuit |
-
2011
- 2011-10-17 CN CN2011203946159U patent/CN202325967U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410123A (en) * | 2011-10-17 | 2012-04-11 | 荆州市鑫祥科技开发有限责任公司 | Double-line plug-in-type startup protector |
| CN111819648A (en) * | 2018-03-22 | 2020-10-23 | 住友电装株式会社 | Relay drive circuit |
| CN111819648B (en) * | 2018-03-22 | 2023-02-28 | 住友电装株式会社 | Relay drive circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120711 Effective date of abandoning: 20130227 |
|
| RGAV | Abandon patent right to avoid regrant |