CN104377656B - Automobile engine circuit with overload delay start - Google Patents
Automobile engine circuit with overload delay start Download PDFInfo
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- CN104377656B CN104377656B CN201410700341.XA CN201410700341A CN104377656B CN 104377656 B CN104377656 B CN 104377656B CN 201410700341 A CN201410700341 A CN 201410700341A CN 104377656 B CN104377656 B CN 104377656B
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- biasing
- delay start
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Abstract
The present invention discloses a kind of automobile engine circuit of band overload delay start, including the sampling module and switching tube being connected with engine coil, the output biasing module being connected with switching tube, the drive circuit being connected with output biasing module, the delay start module being connected with sampling module, and the release module being connected with delay start module, the delay start module are connected by OR gate with drive circuit；The switching signal of drive module is opened or closed by biasing module controlling switch pipe, the voltage of sampling module real-time sampling engine coil, when overload occurs, open delay start module, and then OR gate, the disconnection of drive module controlling switch pipe are passed sequentially through, avoid motor coil long term overloading and burn；After release module electric discharge terminates, delay start module sends low level signal, is closed again by OR gate and drive module controlling switch pipe, avoids switching tube from disconnecting for a long time and do not work.
Description
Technical field
The present invention relates to a kind of automobile engine circuit of band overload delay start, belong to field of switch power, especially relate to
And the control circuit to engine or tranformer protection.
Background technology
The traction of social demand, the promotion of policies and regulations and the progress of technology have promoted the rapid hair of modern automobile industry
Exhibition.And being gradually improved and strengthen with the further development of auto industry and the various regulations about automobile, people are to automobile
The requirement more and more higher of performance indications, for example, not requiring nothing more than, power is high, moment of torsion is big, oil consumption is low, pollution is small, and requires safety
Property is good, comfortableness is good, reliability is high and cost is cheap etc..
Traditional automobile engine circuit discrete device multi-purpose greatly is made, and protection circuit is less, and reliability is poor, such as Fig. 1
Shown, this circuit is not protected to engine, once engine overload or block and be possible to the loss burnt, brought
It is larger.
In view of this, the present inventor is studied this, specially develops a kind of car engine of band overload delay start
Thus electromechanical road, this case produce.
The content of the invention
It is an object of the invention to provide a kind of band overload delay start automobile engine circuit, when engine motor around
When group is overloaded or be short-circuit, closing switch pipe, delay start after overload releasing is waited, to prevent burn-down of electric motor, improve whole aircraft reliability.
To achieve these goals, solution of the invention is：
A kind of automobile engine circuit of band overload delay start, including the sampling module that is connected with engine coil and open
Guan Guan, the output biasing module being connected with switching tube, the drive module being connected with output biasing module, it is connected with sampling module
Delay start module, and the release module being connected with delay start module, the delay start module pass through OR gate and driving
Module is connected；For the switching signal of drive module by exporting being opened or closed for biasing module controlling switch pipe, sampling module is real
When sample engine coil voltage, when overload occurs, open delay start module, and then pass sequentially through OR gate, driving mould
Block controlling switch pipe disconnects, and after release module electric discharge terminates, delay start module sends low level signal, again by OR gate
Closed with drive module controlling switch pipe.
Preferably, above-mentioned sampling module includes sampling resistor, sampling diode and sampling capacitance, wherein, the sampling
The negative electrode of diode is connected by the load of sampling resistor and engine coil, and the sampling capacitance negative pole is grounded, positive pole respectively with
Sampling diode anode, the inverting input of comparison amplifier of delay start module are connected, and sampling module in real time starts by detection
Machine coil load, by sampling resistor, diode is sampled, the information whether coil overloads is reached into sampling capacitance.
Preferably, output biasing module first biasing resistor, the second biasing resistor, the 3rd biasing resistor and the biasing
The tie point of diode, the first biasing resistor and the second biasing resistor is connected with sampling the positive pole of diode, biasing diode sun
Pole is grounded, and negative electrode connects the first biasing resistor and the 3rd biasing resistor, the other end of the 3rd biasing resistor and driving simultaneously
Module is connected.Biasing module is mainly used in providing an initial bias for sampling module.
Preferably, the drive module includes control chip, and the first driving tube being connected with control chip and
Two driving tubes, the gate pole of first driving tube and the second driving tube are connected with control chip simultaneously, and the signal of control chip is defeated
Enter end with OR gate output end to be connected, the first driving tube and the second driving tube of drive module output switching signal driving switch in turn
Pipe works.
Preferably, the delay start module mainly includes the comparison amplifier being connected with sampling diode cathode, than
On the one hand output end compared with amplifier is connected by triode with storage capacitance, on the other hand by postponing triode and deferred telegram
Resistance is connected with the input of OR gate.
Preferably, the release module includes the first release resistance being connected with storage capacitance, with the first release resistance
Connected release triode, and the second release resistance being connected with release transistor base, release module are mainly used in discharging
The electricity of storage capacitance.
The operation principle of the automobile engine circuit of above-mentioned band overload delay start：Sampling module detects generator line in real time
Circle load, by sampling resistor, diode is sampled, the information whether coil overloads is reached into sampling capacitance, while export biasing
The first biasing resistor, the second biasing resistor, the 3rd biasing resistor and the biasing diode of module provide initial letter to sampling capacitance
Breath.When generator coil is normal, switching tube is in switch working state, and the voltage on sampling capacitance is low level, delay start
Module output is low level, drive module normal work；When generator coil overloads, the voltage on sampling capacitance is high electricity
Flat, by delay start module, it is high level to make the voltage in storage capacitance, and then passes through OR gate, drive module shut-off switch
Pipe, after preventing coil fault from excluding, switching tube disconnects for a long time not to work, and increases release in the output end of delay start module
Module, by the first release resistance, release triode and the second release resistance to storage capacitance when switch tube grid is high level
Electric discharge, after electric discharge terminates（After i.e. coil fault releases）, switching tube is again turned on normal work.
Compared with prior art, the automobile engine circuit of the band overload delay start of said structure, is started by detection
Voltage on machine coil, is dynamically reacted on sampling capacitance, by delay start module, the stored charge in storage capacitance,
And then driving tube is controlled, burnt so as to avoid motor coil long term overloading；The electric charge stored in storage capacitance is more, drives
The turn-off time of dynamic pipe is also longer, obtains the required delay start time by adjusting the big I of storage capacitance, avoids switching tube
Long-term disconnect does not work.
The present invention is described in further detail below in conjunction with drawings and the specific embodiments.
Brief description of the drawings
Fig. 1 is automobile engine partial circuit diagram of the prior art；
Fig. 2 is that the band of the present embodiment overloads the automobile engine circuit diagram of delay start.
Embodiment
As shown in Fig. 2 a kind of automobile engine circuit of band overload delay start, including be connected with engine coil L0
Sampling module 1 and switching tube M0, the output biasing module 2 being connected with switching tube M0, the driving mould being connected with output biasing module 2
Block 3, the delay start module 4 being connected with sampling module 1, and the release module 5 being connected with delay start module 4, it is described to prolong
Slow starting module 4 is connected by OR gate with drive module 3.
In the present embodiment, the sampling module 1 includes sampling resistor R0, sampling diode D0 and sampling capacitance C0, its
In, the negative electrode of the sampling diode D0 is connected by sampling resistor R0 with engine coil load, and the sampling capacitance C0 is born
Pole be grounded, positive pole respectively with sampling diode D0 anodes, delay start module 4 comparison amplifier AMP1 inverting input phase
Even.Sampling module 1 detects Transmitter coil load in real time；By sampling resistor R0, diode D0 is sampled, whether coil is overloaded
Information reach sampling capacitance C0.It is the output biasing module 2 first biasing resistor R13, the second biasing resistor R32, the 3rd inclined
Put resistance R12 and biasing diode D3, described first biasing resistor R13 one end is connected with the second biasing resistor R32, the other end and
3rd biasing resistor R12 is connected, and the first biasing resistor R13 and the second biasing resistor R32 tie point are with sampling diode D0's
Positive pole is connected, and biasing diode D3 one end ground connection, the other end connects the first biasing resistor R13 and the 3rd biasing resistor R12 simultaneously,
The other end of the 3rd biasing resistor R12 is connected with drive module, the other end ground connection of the second biasing resistor R32, defeated
Go out biasing module 2 to be mainly used in providing an initial bias for sampling module 1.
The drive module 3 includes control chip control, and be connected with control chip control output ends
One driving tube Q11 and the second driving tube Q12, the emitter stage of the first driving tube Q11 and the second driving tube Q12 gate pole are simultaneously
It is connected with control chip control, after the colelctor electrode connection of the emitter stage and the second driving tube Q12 of the first driving tube Q11
It is connected with switching tube M0；The colelctor electrode of the first driving tube Q11 is connected with delay start module 4, the second driving tube Q12
Grounded emitter；Control chip control signal input part is connected with OR gate output end, the first driving of drive module 3
Output switching signal driving switch pipe M0's pipe Q11 and the second driving tube Q12 works in turn.
The delay start module 4 mainly includes the comparison amplifier AMP1 being connected with sampling diode cathode D0, at this
In embodiment, the delay start module 4 further comprises the reference voltage V REF2 of phase inverter power supply, reference voltage
VREF1.The inverting input of the comparator AMP1 with sampling diode D0 positive poles be connected, in-phase input end respectively with 2 bases
Quasi- voltage is connected, and comparison amplifier AMP1 output end is connected with the first triode Q66 base stages, the first triode Q66's
Emitter stage is connected with the first driving tube Q11 colelctor electrodes of drive module, and the colelctor electrode of the first triode Q66 is on the one hand with depositing
Storage electric capacity Cext is connected, and on the other hand passes sequentially through the first time delay resistance R25, delay triode Q16 and the second postponing resistance R31
It is connected afterwards with the input of OR gate；The release module 5 includes the first release resistance R30 being connected with storage capacitance Cext, with
Release triode Q65 connected first release resistance R30, and the second release resistance being connected with release triode Q65 base stages
R29, described first release resistance R30 one end are connected with the triode Q66 colelctor electrodes of delayed startup module 4 first, and the other end is with releasing
The colelctor electrode for putting triode Q65 is connected, and described second release resistance R29 one end is connected with biasing circuit 2, other end Connection Release
Triode Q65 base stages, the release triode Q65 grounded emitters, release module 5 are mainly used in discharging storage capacitance Cext's
Electricity.
The operation principle of the automobile engine circuit of above-mentioned band overload delay start：Sampling module 1 detects generator in real time
Coil load, by sampling resistor R0, diode D0 is sampled, the coil L0 information whether overloaded is reached into sampling capacitance C0, together
When, the first biasing resistor R13, the second biasing resistor R32, the 3rd biasing resistor R12 and the biasing diode of output biasing module 2
D3 provides initial information to sampling capacitance C0.When generator coil L0 is normal, switching tube M0 is in switch working state, sampling electricity
The voltage held on C0 be low level, and it is low level that delay start module, which exports, the normal work of drive module 3；Work as generator coil
When L0 overloads, the voltage on sampling capacitance C0 is high level, by delay start module 4, makes the voltage on storage capacitance Cext
For high level, and then pass through OR gate, drive module on-off switching tube M0, after preventing coil fault from excluding, switching tube is for a long time
Disconnection does not work, and increases release module 5 in the output end of delay start module, switching tube M0 grids pass through first when being high level
Resistance R29, the release resistance R30 of release triode Q65 and second are discharged to storage capacitance Cext electric discharges, are discharged after terminating（That is line
After enclosing trouble shooting）, switching tube M0 is again turned on normal work.The working time of release module 5 is mainly by storage capacitance Cext
Storing up electricity capacity control, the time needed according to failture evacuation, come corresponding to selection storage capacitance Cext size, Jin Erke
Control the delay start time.
Above-described embodiment and schema and non-limiting product form of the invention and style, any art it is common
The appropriate change or modification that technical staff is done to it, it all should be regarded as not departing from the patent category of the present invention.
Claims (5)
- A kind of 1. automobile engine circuit of band overload delay start, it is characterised in that：Adopted including what is be connected with engine coil Egf block and switching tube, the output biasing module being connected with switching tube, the drive module being connected with output biasing module, with sampling The connected delay start module of module, and the release module being connected with delay start module, the delay start module pass through OR gate is connected with drive module；The switching signal of drive module by exporting being opened or closed for biasing module controlling switch pipe, The voltage of sampling module real-time sampling engine coil, when overload occurs, open delay start module, and then pass sequentially through or Door, drive module controlling switch pipe disconnect, and after release module electric discharge terminates, delay start module sends low level signal, then It is secondary to be closed by OR gate and drive module controlling switch pipe；The sampling module includes sampling diode, the output biasing mould Block includes the first biasing resistor, the second biasing resistor, the 3rd biasing resistor and biasing diode, described first biasing resistor one end It is connected with the second biasing resistor, the first biasing resistor other end is connected with the 3rd biasing resistor, the first biasing resistor and The tie point of two biasing resistors is connected with sampling the positive pole of diode, and biasing diode anode ground connection, negative electrode connects first simultaneously Biasing resistor and the 3rd biasing resistor, the other end of the 3rd biasing resistor are connected with drive module, second biased electrical The other end ground connection of resistance.
- A kind of 2. automobile engine circuit of band overload delay start as claimed in claim 1, it is characterised in that：The sampling Module includes sampling resistor, sampling diode and sampling capacitance, wherein, the negative electrode of the sampling diode by sampling resistor with Engine coil load is connected, and the sampling capacitance negative pole ground connection, sampling capacitance positive pole is respectively with sampling diode anode, delay The inverting input of the comparison amplifier of starting module is connected, and sampling module detects engine coil load in real time, passes through sampling Resistance, diode is sampled, the information whether coil overloads is reached into sampling capacitance.
- A kind of 3. automobile engine circuit of band overload delay start as claimed in claim 1, it is characterised in that：The driving Module includes control chip, and the first driving tube and the second driving tube being connected with control chip, first driving tube and The gate pole of second driving tube is connected with control chip simultaneously, the emitter stage of first driving tube and the colelctor electrode of the second driving tube It is connected after connection with switching tube；The colelctor electrode of first driving tube is connected with delay start module, second driving tube Grounded emitter；The signal input part of control chip is connected with OR gate output end, and the first driving tube of drive module and second drives Output switching signal driving switch pipe works dynamic pipe in turn.
- A kind of 4. automobile engine circuit of band overload delay start as claimed in claim 1, it is characterised in that：The delay Starting module mainly include with the comparison amplifier that is connected of sampling diode cathode, wherein, the comparison amplifier it is anti-phase defeated Enter end with sampling diode cathode be connected, in-phase input end is connected with 2 reference voltages respectively, the output end of comparison amplifier and First transistor base is connected, and the emitter stage of first triode is connected with drive module, the current collection of first triode On the one hand pole is connected with storage capacitance, on the other hand pass sequentially through the first time delay resistance, delay triode and the second postponing resistance It is connected afterwards with the input of OR gate.
- A kind of 5. automobile engine circuit of band overload delay start as claimed in claim 1, it is characterised in that：The release Module is including the first release resistance being connected with storage capacitance, the release triode being connected with the first release resistance, and with releasing Put the second release resistance that transistor base is connected, described first release resistance one end and delayed startup module the first triode collection Electrode is connected, and the other end is connected with discharging the colelctor electrode of triode, and described second release resistance one end is connected with biasing circuit, separately One end Connection Release transistor base, the release transistor emitter ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410700341.XA CN104377656B (en) | 2014-11-28 | 2014-11-28 | Automobile engine circuit with overload delay start |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410700341.XA CN104377656B (en) | 2014-11-28 | 2014-11-28 | Automobile engine circuit with overload delay start |
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| Publication Number | Publication Date |
|---|---|
| CN104377656A CN104377656A (en) | 2015-02-25 |
| CN104377656B true CN104377656B (en) | 2018-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410700341.XA Active CN104377656B (en) | 2014-11-28 | 2014-11-28 | Automobile engine circuit with overload delay start |
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| Country | Link |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3814251C1 (en) * | 1988-04-27 | 1989-06-22 | Bicc-Vero Elektronics Gmbh, 2800 Bremen, De | Protective circuit for capacitive loads |
| CN103178498A (en) * | 2011-12-20 | 2013-06-26 | 科勒公司 | Overvoltage protection system and method |
| CN103972869A (en) * | 2014-04-18 | 2014-08-06 | 深圳市诺比邻科技有限公司 | Dual-protection system and method for batteries |
| CN204230866U (en) * | 2014-11-28 | 2015-03-25 | 绍兴芯谷科技有限公司 | The automobile engine circuit of band overload delay start |
-
2014
- 2014-11-28 CN CN201410700341.XA patent/CN104377656B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3814251C1 (en) * | 1988-04-27 | 1989-06-22 | Bicc-Vero Elektronics Gmbh, 2800 Bremen, De | Protective circuit for capacitive loads |
| CN103178498A (en) * | 2011-12-20 | 2013-06-26 | 科勒公司 | Overvoltage protection system and method |
| CN103972869A (en) * | 2014-04-18 | 2014-08-06 | 深圳市诺比邻科技有限公司 | Dual-protection system and method for batteries |
| CN204230866U (en) * | 2014-11-28 | 2015-03-25 | 绍兴芯谷科技有限公司 | The automobile engine circuit of band overload delay start |
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| Publication number | Publication date |
|---|---|
| CN104377656A (en) | 2015-02-25 |
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