CN103645413B - Testing circuit and automobile-used inversion system thereof - Google Patents
Testing circuit and automobile-used inversion system thereof Download PDFInfo
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- CN103645413B CN103645413B CN201310730519.0A CN201310730519A CN103645413B CN 103645413 B CN103645413 B CN 103645413B CN 201310730519 A CN201310730519 A CN 201310730519A CN 103645413 B CN103645413 B CN 103645413B
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Abstract
The invention discloses testing circuit, for a voltage changer including voltage conversion circuit and out splice going splice, the outfan of voltage conversion circuit is connected with out splice going splice, and testing circuit includes isolator and series circuit；Isolator is used for detecting between voltage conversion circuit and out splice going splice whether open circuit, including power supply, the first resistance, the trigger element being positioned on former limit and be positioned at the element that is triggered on secondary；Trigger element two ends are connected with the input of out splice going splice；Series circuit includes on-off circuit and second resistance of series connection；On-off circuit is for closing according to the change of externally input or disconnecting；Series circuit is connected with power supply by the first resistance with after the element in parallel that is triggered.The invention also discloses the automobile-used inversion system adopting this testing circuit.This testing circuit can detect the break-make between change and voltage conversion circuit and the out splice going splice of externally input simultaneously, and exports different detection signals, it is simple to voltage conversion circuit is controlled by subsequent control system.
Description
Technical field
The present invention relates to a kind of testing circuit and automobile-used inversion system thereof.
Background technology
Voltage translation circuitry is a kind of system that source voltage can convert to demand voltage.Along with the development and progress of science and technology, voltage translation circuitry has been obtained for being widely applied, and it is of a great variety, such as AC-DC converting system, DC-DC converting system, DC-AC inversion system etc..Widely used while, people are also found that voltage translation circuitry still exists many safety problems.For automobile-used inversion system, Fig. 1 illustrates the theory diagram of automobile-used inversion system, and wherein, the input of inverter circuit 91 is connected with battery 92, and outfan is connected with socket 93 by high-voltage wiring harness 94.The microswitch (not shown) being arranged in socket 93 is connected with the input of controller 96 by control line 95, and the outfan of controller 96 is connected with the control end of inverter circuit 91.Owing to inverter circuit 91 is output as High AC voltage, if therefore high-voltage wiring harness 94 has the situation of disconnection will cause potential safety hazard, in some instances it may even be possible to cause the generation of electric shock or fire.In order to eliminate the potential safety hazard that this situation is brought, it is necessary to the open circuit conditions between inverter circuit 91 and socket 93 is detected, it is ensured that there is no open circuit between inverter circuit 91 and socket 93, just export High AC voltage.
Summary of the invention
It is an object of the invention to provide a kind of testing circuit, it can detect the break-make between change and voltage conversion circuit and the out splice going splice of externally input simultaneously, and export different detection signals according to the on off operating mode between external input state and voltage conversion circuit from out splice going splice, consequently facilitating follow-up control system judges the on off operating mode between external input state and voltage conversion circuit and out splice going splice according to the output signal of this testing circuit.
A further object of the present invention is in that to provide a kind of automobile-used inversion system adopting above-mentioned testing circuit.
For achieving the above object, the present invention adopts the following technical scheme that a kind of testing circuit, for a voltage changer, this voltage changer includes voltage conversion circuit and out splice going splice, the outfan of this voltage conversion circuit is connected with out splice going splice, it is characterized in that, this testing circuit includes isolator and series circuit；Isolator is used for detecting between voltage conversion circuit and out splice going splice and whether there is open circuit, and this isolator includes power supply, the first resistance, the trigger element being positioned on former limit and the element that is triggered being positioned on secondary；The two ends of trigger element are connected with the input of described out splice going splice；Series circuit includes the on-off circuit and the second resistance that are serially connected；On-off circuit is for closing according to the change of externally input or disconnecting；This series circuit is connected with power supply by the first resistance with after the described element in parallel that is triggered.
Above-mentioned testing circuit, wherein, isolator is optocoupler；Trigger element is light emitting diode, and the element that is triggered is phototriode；One end of series circuit is connected with the colelctor electrode of phototriode, and the other end is connected with the emitter stage of phototriode.
Above-mentioned testing circuit, wherein, optocoupler is additionally provided with the 3rd resistance；The colelctor electrode of phototriode is connected with power supply by the first resistance, and emitter stage is connected with one end of the 3rd resistance, the equal ground connection of the other end of the other end of the 3rd resistance and described series circuit.
Above-mentioned testing circuit, wherein, testing circuit includes filter circuit, and the input of this filter circuit is attempted by the two ends of described series circuit.
Above-mentioned testing circuit, wherein, optocoupler includes the first diode, and the positive pole of this first diode is connected with one end of the input of out splice going splice, and negative pole is connected with the positive pole of light emitting diode；Optocoupler includes the current-limiting resistance connected with light emitting diode.
Above-mentioned testing circuit, wherein, optocoupler includes the second diode and current-limiting resistance, and the second diode is connected with current-limiting resistance with after light emitting diode reverse parallel connection.
Above-mentioned testing circuit, wherein, described externally input is the duty of out splice going splice, and on-off circuit closes according to the change of the duty of out splice going splice or disconnects.
Above-mentioned testing circuit, wherein, voltage changer is vehicle-used inverter, and voltage conversion circuit is inverter circuit, and out splice going splice is a socket, and the outfan of this inverter circuit is connected with this socket by high-voltage line；On-off circuit is the microswitch being arranged in this socket, and when socket is not connected with external plug, this microswitch disconnects；When this socket is connected with external plug, this microswitch closes.
Present invention also offers a kind of automobile-used inversion system, including vehicle-used inverter, this vehicle-used inverter includes inverter circuit and socket, and the outfan of this inverter circuit is connected with this socket by high-voltage wiring harness；It is characterized in that, this automobile-used inversion system also includes:
Testing circuit, this testing circuit includes isolator and series circuit；Described isolator is used for detecting between inverter circuit and socket and whether there is open circuit, and this isolator includes power supply, the first resistance, the trigger element being positioned on former limit and the element that is triggered being positioned on secondary；The input of trigger element and socket is connected in parallel；Series circuit includes the on-off circuit and the second resistance that are serially connected；On-off circuit closes for the change of the duty according to socket or disconnects, and when socket is not connected with external plug, this on-off circuit disconnects；When this socket is connected with external plug, this on-off circuit closes；This series circuit is connected with described power supply by the first described resistance with after the described element in parallel that is triggered；
Controller, the input of this controller is connected with the outfan of this testing circuit, and the outfan of described controller is connected with the control end of described inverter circuit；For the exporting change according to testing circuit, this controller controls whether inverter circuit carries out inversion work；Wherein, when described on-off circuit is transferred to closure state by off-state, controller controls inverter circuit and starts inversion work；If isolator detects when inverter circuit works when being absent from open circuit between inverter circuit and socket, controller controls inverter circuit and works on, if isolator detects when inverter circuit works when there is open circuit between inverter circuit and socket, controller controls inverter circuit and quits work；When on-off circuit is transferred to off-state by closure state, controller controls inverter circuit and quits work.
Above-mentioned automobile-used inversion system, wherein, isolator is optocoupler, and optocoupler is provided with the 3rd resistance；Trigger element is light emitting diode, and the element that is triggered is phototriode；The colelctor electrode of phototriode is connected with power supply by the first resistance, and emitter stage is connected with one end of the 3rd resistance, the other end ground connection of the 3rd resistance；One end of series circuit is connected with the colelctor electrode of described phototriode, and the other end of the other end and the 3rd resistance connects.
Compared with prior art, the present invention at least has the advantages that
1, the testing circuit of the present invention can detect the break-make between change and voltage conversion circuit and the out splice going splice of externally input simultaneously, and export different detection signals according to the on off operating mode between external input state and voltage conversion circuit from out splice going splice, consequently facilitating follow-up control system can judge the on off operating mode between external input state and voltage conversion circuit and out splice going splice according to the output signal of this testing circuit, and voltage conversion circuit is made corresponding control, thoroughly eliminate the potential safety hazard because open circuit between voltage conversion circuit and out splice going splice causes；
2, the testing circuit of the present invention adopts whether there is open circuit between isolator detection voltage conversion circuit and out splice going splice, it is possible to achieve input and the isolation of outfan, is therefore particularly suitable for the detection to high-voltage wiring harness open circuit；
3, when the testing circuit of the present invention is applied to vehicle-used inverter system, available automobile-used inversion system existing control line transmission detection signal, thus extra wire harness cost can be saved.
Accompanying drawing explanation
Fig. 1 is the schematic block circuit diagram of existing automobile-used inversion system.
Fig. 2 is the circuit diagram of an embodiment of testing circuit of the present invention.
Fig. 3 is the circuit diagram of another embodiment of testing circuit of the present invention.
Fig. 4 is the schematic block circuit diagram of an embodiment of the voltage changer adopting testing circuit of the present invention.
Fig. 5 is the theory diagram of an embodiment of the automobile-used inversion system of the present invention.
Detailed description of the invention
The detailed description of the invention of voltage conversion system of the present invention is described in detail below in conjunction with accompanying drawing.
Refer to Fig. 2.Testing circuit 100 is for a voltage changer according to an embodiment of the invention, and this voltage changer includes voltage conversion circuit and out splice going splice, and the outfan of this voltage conversion circuit is connected with out splice going splice.This testing circuit includes optocoupler 11, series circuit 12 and filter circuit 13.
Optocoupler includes 5V power supply, the first resistance R2, the LED 1 being positioned on former limit and the phototriode Q1 being positioned on secondary.The former limit of optocoupler is connected to the input of out splice going splice.The former limit of optocoupler is provided with the second diode D1 and current-limiting resistance R1 of the tandem compound reverse parallel connection of LED the 2, first diode D2 and LED 1 and the LED 2 connected with LED 1.LED 2 is used for showing testing result.Second diode D1 is used for protecting LED 1 and LED 2, it is to avoid is reversed and punctures and damage.The positive pole of the first diode D2 is connected with one end of the input of out splice going splice (i.e. the one end on the former limit of optocoupler), and negative pole is connected with the positive pole of LED 1 after connecting with current-limiting resistance R1.First diode D2 is commutation diode, to realize the unilateal conduction of circuit.By selecting suitable resistance for current-limiting resistance R1, it may be achieved: 1. LED 2 normal operation；2. optocoupler normal operation；3. detection loss is less.
Series circuit includes the on-off circuit S1 and the second resistance R4 that are serially connected.On-off circuit S1 is for closing according to the change of externally input or disconnecting；This series circuit is connected by the first resistance R2 and 5V power supply with after phototriode Q1 parallel connection.Wherein, one end of series circuit is connected with the colelctor electrode of phototriode Q1, and the other end is connected with the emitter stage of phototriode Q1.Preferably, one end of emitter stage and the 3rd resistance R3 that the emitter stage of phototriode Q1 is provided with the 3rd resistance R3 as pull down resistor, phototriode Q1 connects, the equal ground connection of the other end of the other end of the 3rd resistance R3 and described series circuit.First resistance R2 can as in figure 2 it is shown, use as pull-up resistor, it is also possible to as it is shown on figure 3, use as pull down resistor.That is, aforesaid series circuit includes following two detailed description of the invention with being connected by the first resistance R2 and 5V power supply after phototriode Q1 parallel connection: 1. series circuit connects 5V power supply again with being connected the first resistance R2 after phototriode Q1 parallel connection；(as shown in Figure 2) 2. series circuit is connected the first resistance R2 with one end after phototriode Q1 parallel connection, and the other end connects 5V power supply (as shown in Figure 3).
Filter circuit 13 includes the 4th resistance R5, the first electric capacity C1 and the second electric capacity C2.This filter circuit can filter away high frequency noise, thus ensure detection signal real-time.Wherein, the first electric capacity C1 is connected in parallel on the two ends of aforementioned series circuit, is connected in parallel on the two ends of the first electric capacity C1 after the 4th resistance R5 and the second electric capacity C2 series connection.
In other embodiments, above-mentioned optocoupler also can be replaced magnetic coupling or other isolation switches.
Refer to Fig. 4.The outfan of above-mentioned testing circuit 100 can be connected with the input of the controller 300 for controlling voltage conversion circuit 200.The power input of voltage conversion circuit 200 is connected with the outfan of power supply 500, and the outfan of voltage conversion circuit 200 is connected with out splice going splice 400.Testing circuit 100 can detect the break-make between change and voltage conversion circuit 200 and the out splice going splice 400 of externally input simultaneously, and export different detection signals according to the on off operating mode between external input state and voltage conversion circuit from out splice going splice, consequently facilitating controller 300 judges the on off operating mode between external input state and voltage conversion circuit and out splice going splice according to the output signal of testing circuit 100, and voltage conversion circuit 200 is made corresponding control, thoroughly eliminate the potential safety hazard because open circuit between voltage conversion circuit 200 and out splice going splice 400 causes.
The different detection RSTs corresponding to the on off operating mode between different on-off circuit state and voltage conversion circuit from out splice going splices are illustrated below in conjunction with the embodiment shown in Fig. 2:
State I: on-off circuit S1 closes conducting, and phototriode Q1 is also at saturation conduction state.Parallel circuit that now the 3rd resistance R3 and the second resistance R4 forms and the first resistance R2 dividing potential drop, thus can calculate detection signal level under this state is VI=R3*R4*5V/ [R3*R4+R2* (R3+R4)]；
State I I: on-off circuit S1 disconnects, and phototriode Q1 is also at saturation conduction.Now only having the 3rd resistance R3 and the first resistance R2 dividing potential drop, thus can calculate detection signal level under this state is VII=R3*5V/(R2+R3)；
State I II: on-off circuit S1 closes conducting, and phototriode Q1 is in open-circuit condition.Now only having the 2nd R4 and the first resistance R2 dividing potential drop, thus can calculate detection signal level under this state is VIII=R4*5V/(R2+R4)；
State I V: on-off circuit S1 disconnects, and phototriode Q1 is in open-circuit condition, and now 5V power supply is without dividing potential drop, and therefore under this state, detection signal level is VIV=5V.
It is for vehicle-used inverter for voltage changer, shown in Fig. 5, aforesaid voltage conversion circuit 200 is inverter circuit 200a, out splice going splice 400 is socket 400a, vehicle-used inverter includes inverter circuit 200a and socket 400a, and the outfan of inverter circuit 200a is connected with this socket 400a by high-voltage wiring harness；Aforesaid externally input is the duty of socket 400a, on-off circuit S1 is preferably the microswitch being arranged in this socket, on-off circuit S1 closes according to the change of the duty of socket or disconnects: when socket is not connected with external plug, and this on-off circuit S1 disconnects；When this socket is connected with external plug, this on-off circuit S1 is triggered Guan Bi.It is turned on or off according to on-off circuit S1 and whether inverter circuit 200a delivers current to the different situations of socket by high-voltage wiring harness, it is possible to obtain 4 kinds of varying level combined situation of the detection signal of testing circuit 100:
When having High AC voltage (i.e. non-open circuit between inverter circuit 200a and socket 400a) in on-off circuit S1 Guan Bi and socket 400a, owing to the positive and negative half power frequency period situation of alternating voltage is different, therefore testing circuit now is by corresponding above-mentioned state I and state I II, the signal of the power frequency period that detection signal is VI level and VIII level is rotated；
When on-off circuit S1 Guan Bi and in socket 400a without high-voltage alternating (namely having open circuit between inverter circuit 200a and socket 400a) time, this kind of situation only corresponding states III, detect signal be persistence level VIII；
When on-off circuit S1 disconnects and has High AC voltage in socket 400a, also according to positive and negative power frequency period different situations, this situation corresponding states II and state I V, detection signal is the signal of the power frequency period that VII and VIV level is rotated；
When in on-off circuit S1 disconnection and socket 400a without High AC voltage, this situation only corresponding states IV, detection signal is lasting level VIV.
As an alternate embodiment of testing circuit 100, this testing circuit includes the isolator and the series circuit 12 that are made up of optocoupler 11.Isolator 11 is used for detecting between inverter circuit 200a and socket 400a whether there is open circuit, and this isolator 11 includes power supply, the first resistance R2, is positioned on former limit the trigger element being made up of LED 1 and the element that is triggered being positioned on secondary, being made up of phototriode Q1；Trigger element is connected with the input of socket 400a；Series circuit 12 includes the on-off circuit S1 and the second resistance R4 that are serially connected；This series circuit 12 is connected with described power supply by the first resistance R2 with after the element in parallel that is triggered.
The input of controller 300 is connected with the outfan of testing circuit 100, and the outfan of controller 300 is connected with the control end of inverter circuit 200a；For the exporting change according to testing circuit 100, this controller 300 controls whether inverter circuit 200a carries out inversion work；Wherein, when on-off circuit S1 is transferred to closure state by off-state, controller 300 controls inverter circuit 200a and starts inversion work；If isolator detects when inverter circuit 200a works when being absent from open circuit between inverter circuit 200a and socket 400a, controller 300 controls inverter circuit 200a and works on, if isolator detects when inverter circuit 200a works when there is open circuit between inverter circuit 200a and socket 400a, controller 300 controls inverter circuit 200a and quits work；When on-off circuit S1 is transferred to off-state by closure state, controller 300 controls inverter circuit 200a and quits work.
Claims (9)
1. a testing circuit, for a voltage changer, this voltage changer includes voltage conversion circuit and out splice going splice, and the outfan of this voltage conversion circuit is connected with out splice going splice, it is characterised in that this testing circuit includes isolator and series circuit；
Described isolator is used for detecting between voltage conversion circuit and out splice going splice and whether there is open circuit, and this isolator includes power supply, the first resistance, the trigger element being positioned on former limit and the element that is triggered being positioned on secondary；The two ends of described trigger element are connected with the input of described out splice going splice；
Described series circuit includes the on-off circuit and the second resistance that are serially connected；Described on-off circuit is for closing according to the change of externally input or disconnecting；This series circuit is connected with described power supply by the first described resistance with after the described element in parallel that is triggered；Wherein, described externally input is the duty of out splice going splice, and described on-off circuit closes according to the change of the duty of out splice going splice or disconnects.
2. testing circuit as claimed in claim 1, it is characterised in that described isolator is optocoupler；Described trigger element is light emitting diode, and the described element that is triggered is phototriode；
One end of described series circuit is connected with the colelctor electrode of described phototriode, and the other end is connected with the emitter stage of phototriode.
3. testing circuit as claimed in claim 2, it is characterised in that described optocoupler is additionally provided with the 3rd resistance；The colelctor electrode of described phototriode is connected with described power supply by the first described resistance, and emitter stage is connected with one end of the 3rd resistance, the equal ground connection of the other end of the other end of the 3rd resistance and described series circuit.
4. testing circuit as claimed in claim 3, it is characterised in that described testing circuit includes filter circuit, and the input of this filter circuit is attempted by the two ends of described series circuit.
5. testing circuit as claimed in claim 3, it is characterised in that described optocoupler includes the first diode, and the positive pole of this first diode is connected with one end of the input of out splice going splice, and negative pole is connected with the positive pole of described light emitting diode；
Described optocoupler includes the current-limiting resistance connected with described light emitting diode.
6. testing circuit as claimed in claim 3, it is characterised in that described optocoupler includes the second diode and current-limiting resistance, and described second diode is connected with described current-limiting resistance with after described light emitting diode reverse parallel connection.
7. the testing circuit as in any of the one of claim 1 to 6, it is characterized in that, described voltage changer is vehicle-used inverter, and described voltage conversion circuit is inverter circuit, described out splice going splice is a socket, and the outfan of this inverter circuit is connected with this socket by high-voltage line；
Described on-off circuit is the microswitch being arranged in this socket, and when socket is not connected with external plug, this microswitch disconnects；When this socket is connected with external plug, this microswitch closes.
8. an automobile-used inversion system, including vehicle-used inverter, this vehicle-used inverter includes inverter circuit and socket, and the outfan of this inverter circuit is connected with this socket by high-voltage wiring harness；It is characterized in that, this automobile-used inversion system also includes:
Testing circuit, this testing circuit includes isolator and series circuit；Described isolator is used for detecting between inverter circuit and socket and whether there is open circuit, and this isolator includes power supply, the first resistance, the trigger element being positioned on former limit and the element that is triggered being positioned on secondary；The input of described trigger element and described socket is connected in parallel；Described series circuit includes the on-off circuit and the second resistance that are serially connected；Described on-off circuit closes for the change of the duty according to socket or disconnects, and when socket is not connected with external plug, this on-off circuit disconnects；When this socket is connected with external plug, this on-off circuit closes；This series circuit is connected with described power supply by the first described resistance with after the described element in parallel that is triggered；
Controller, the input of this controller is connected with the outfan of this testing circuit, and the outfan of described controller is connected with the control end of described inverter circuit；For the exporting change according to testing circuit, this controller controls whether inverter circuit carries out inversion work；Wherein, when described on-off circuit is transferred to closure state by off-state, controller controls inverter circuit and starts inversion work；If isolator detects when inverter circuit works when being absent from open circuit between inverter circuit and socket, controller controls inverter circuit and works on, if isolator detects when inverter circuit works when there is open circuit between inverter circuit and socket, controller controls inverter circuit and quits work；When on-off circuit is transferred to off-state by closure state, controller controls inverter circuit and quits work.
9. automobile-used inversion system as claimed in claim 8, it is characterised in that described isolator is optocoupler, and described optocoupler is provided with the 3rd resistance；Described trigger element is light emitting diode, and the described element that is triggered is phototriode；
The colelctor electrode of described phototriode is connected with described power supply by the first described resistance, and emitter stage is connected with one end of the 3rd resistance, the other end ground connection of the 3rd resistance；
One end of described series circuit is connected with the colelctor electrode of described phototriode, and the other end of the other end and the 3rd resistance connects.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310730519.0A CN103645413B (en) | 2013-12-26 | 2013-12-26 | Testing circuit and automobile-used inversion system thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310730519.0A CN103645413B (en) | 2013-12-26 | 2013-12-26 | Testing circuit and automobile-used inversion system thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2781390Y (en) * | 2005-03-14 | 2006-05-17 | 重庆汇力汽车电子仪表有限公司 | Vehicle loading short circuit, open circuit predetection circuit |
| CN201060739Y (en) * | 2007-06-12 | 2008-05-14 | 天津市中天峰电器有限公司 | Mutual inductor with self-circuit open circuit and short circuit detection function |
| CN103063979A (en) * | 2013-01-04 | 2013-04-24 | 合肥市英唐科技有限公司 | Load open-circuit detection circuit |
| CN103378603A (en) * | 2012-04-24 | 2013-10-30 | 通用电气公司 | Open-circuit fault detection device, converter controller, and energy conversion system and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03262981A (en) * | 1990-03-14 | 1991-11-22 | Hitachi Ltd | Wire breaking detection system |
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2013
- 2013-12-26 CN CN201310730519.0A patent/CN103645413B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2781390Y (en) * | 2005-03-14 | 2006-05-17 | 重庆汇力汽车电子仪表有限公司 | Vehicle loading short circuit, open circuit predetection circuit |
| CN201060739Y (en) * | 2007-06-12 | 2008-05-14 | 天津市中天峰电器有限公司 | Mutual inductor with self-circuit open circuit and short circuit detection function |
| CN103378603A (en) * | 2012-04-24 | 2013-10-30 | 通用电气公司 | Open-circuit fault detection device, converter controller, and energy conversion system and method |
| CN103063979A (en) * | 2013-01-04 | 2013-04-24 | 合肥市英唐科技有限公司 | Load open-circuit detection circuit |
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Address after: 201203 China Zuchongzhi Road (Shanghai) Free Trade Zone No. 2388 building 1-2 Co-patentee after: Zhejiang Keboda Industrial Co., Ltd. Patentee after: Koboda technology, Limited by Share Ltd Co-patentee after: WENZHOU KEBODA AUTO PARTS CO., LTD. Address before: 201203 Shanghai city Zuchongzhi road Pudong New Area Zhangjiang hi tech Park No. 2388 Co-patentee before: Zhejiang Keboda Industrial Co., Ltd. Patentee before: Keboda Technology Corp. Co-patentee before: WENZHOU KEBODA AUTO PARTS CO., LTD. |
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