CN206460147U - Contacts status on-line real-time measuremen circuit in a kind of high tension loop - Google Patents
Contacts status on-line real-time measuremen circuit in a kind of high tension loop Download PDFInfo
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- CN206460147U CN206460147U CN201720013906.6U CN201720013906U CN206460147U CN 206460147 U CN206460147 U CN 206460147U CN 201720013906 U CN201720013906 U CN 201720013906U CN 206460147 U CN206460147 U CN 206460147U
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Abstract
The utility model discloses contacts status on-line real-time measuremen circuit in a kind of high tension loop, signal input part connects the first diode D1 anode, the second diode D2 negative electrode, the 3rd diode D3 anode and the second electric capacity C2, first diode D1 negative electrode is connected with power supply VCC, 3rd diode D3 negative electrode connection the first electric capacity C1 and 3rd resistor R3, the 3rd resistor R3 other ends connect the 4th resistance R4, the second electric capacity C2 other end connection high frequency transformer B1 primary coil；High frequency transformer B1 secondary coil connects two ends of the section respectively through two high-voltage capacitance connecting valve K1；Switch K1 is connected with the positive pole of rectifier.The utility model is to relay（Or contactor）State is detected in real time, while not influenceing the normal work of high pressure major loop.
Description
Technical field
The utility model is related to HVDC charging pile field, specifically, is to be related to contact shape in a kind of high tension loop
State on-line real-time measuremen circuit.
Background technology
At present to relay（Or contactor）The judgement of node state, relies primarily on detection auxiliary contact（It is same with main contacts
Step is acted）State detected.The deficiency of presence is：
1st, the relay for being unworthy of auxiliary contact can not be detected（Or contactor）Working condition.Because adding for auxiliary contact, matches somebody with somebody,
The problems such as complex process, device volume are big, price is high can be caused.Therefore, it can be only equipped with the auxiliary contact of main contacts synchronization action
On voltage height, the relay that electric current is big, cost is high or contactor, most of relay, contactor are not equipped with auxiliary contact,
Cause main contacts abnormal（Adhesion or pull-in failure）Detection difficult.In order to meet the detection of main contacts adhesion or action failure,
Have to from plus match somebody with somebody the relay of auxiliary contact（Or contactor）, cause device cost high.
2nd, auxiliary contact and the nonsynchronous failure of main contacts can not be solved.I.e.:The detection of auxiliary contact, due to not being direct
Detect the state of main contacts, it is impossible to solve under a few cases, auxiliary contact act nonsynchronous problem with main contacts.In manufacture work
Skill, when using caused by temperature during the exception such as deformation, elastic failure, action screens, relay, the auxiliary contact of contactor can be sent out
Raw situation asynchronous with main contacts operating state, inconsistent.Cause complete machine error detection, misoperation.
3rd, the defect that existing directly detection main contacts circuit is present, circuit is complicated, and does not isolate with main contacts circuit, shadow
Ring the work of main circuit.
Drawbacks described above, is worth improving.
The content of the invention
In order to overcome the shortcomings of existing technology, it is real-time online that the utility model provides contacts status in a kind of high tension loop
Detect circuit, in HVDC loop, relay（Or contactor）Main contacts sticks together or during pull-in failure, and this practicality is new
Type is to relay（Or contactor）State is detected in real time, while not influenceing the normal work of high pressure major loop.
Technical solutions of the utility model are as described below：
Contacts status on-line real-time measuremen circuit in a kind of high tension loop, including signal input part, signal output part and
Power supply VCC, it is characterised in that
The signal input part connects the first diode D1 anode, the second diode D2 negative electrode, the three or two pole respectively
Pipe D3 anode and the second electric capacity, the negative electrode of the first diode D1 are connected with the power supply VCC, the 3rd diode
D3 negative electrode connects the first electric capacity C1 and 3rd resistor R3, and the 3rd resistor R3 other ends connect the 4th resistance R4, and described the
Two electric capacity C2 other end connection high frequency transformer B1 primary coil, the primary coil of the high frequency transformer B1 it is another
The anode at end, the other end of the 4th resistance R4, the other end of the first electric capacity C1 and the second resistance D2 connects
Ground；
The secondary coil of the high frequency transformer B1 connects section respectively through the 3rd electric capacity C3 and the 4th electric capacity C4 connecting valves
K1 two ends, the two ends of the switch K1 are also connected with high tension loop.
According to the utility model of such scheme, it is characterised in that the switch K1 touches for the master of relay or contactor
Point switch.
According to the utility model of such scheme, it is characterised in that the signal input part input signal is square-wave signal.
Further, the dutycycle of the square-wave signal is 70%, 150KHz.
Further, anode of the signal input part through over level negater circuit and the first diode D1, the two or two
Pole pipe D2 negative electrode, the 3rd diode D3 anode and the second capacitance connection,
The level negater circuit includes first resistor R1, second resistance R2 and triode Q1, the signal input part
By first resistor R1 connecting triodes Q1 base stage, the colelctor electrode of the triode Q1 connects the second resistance R2 and institute
The first diode D1 anode is stated, the other end of the second resistance R2 connects the power supply VCC, the transmitting of the triode Q1
Pole is grounded.
According to the utility model of such scheme, its advantage is, the utility model can detect circuit and high pressure
The isolation of direct current main circuit, the work of main circuit is not influenceed, realizes that the main contacts state isolated entirely is detected in real time, not against auxiliary
Contact, and the work of HVDC main circuit is not influenceed.The utility model has that low in energy consumption, cost is low, circuit constitutes simple, electricity
The characteristics of road constitutes small volume.The utility model can also be processed into thick film module or circuit unit, installation, the weldering of convenient device
Dress.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment.
Test point T1 oscillogram Fig. 2 is switchs K1 disconnections in the utility model when.
Test point T2 oscillogram Fig. 3 is switchs K1 disconnections in the utility model when.
Test point T1 oscillogram Fig. 4 is switchs K1 closures in the utility model when.
Test point T2 oscillogram Fig. 5 is switchs K1 closures in the utility model when.
Embodiment
Below in conjunction with the accompanying drawings and the utility model is further described embodiment：
As shown in figure 1, contacts status on-line real-time measuremen circuit in a kind of high tension loop, including signal input part, signal
Output end and power supply VCC.
Signal input part passes through first resistor R1 connecting triodes Q1 base stage, and triode Q1 colelctor electrode connects the respectively
Two resistance R2, the first diode D1 anode, the second diode D2 negative electrode, the 3rd diode D3 anode and the second electric capacity
C2, second resistance R2 and the first diode D1 negative electrode are connected with power supply VCC, the 3rd diode D3 electricity of negative electrode connection first
Hold C1 and 3rd resistor R3, the 3rd resistor R3 other ends connect the 4th resistance R4, and the second electric capacity C2 other end connection high frequency becomes
Depressor B1 primary coil, the other end of high frequency transformer B1 primary coil, the 4th resistance R4 other end, the first electric capacity C1
The other end, second resistance D2 anode and triode Q1 emitter stage is grounded.
High frequency transformer B1 secondary coil connects section respectively through the 3rd electric capacity C3's and the 4th electric capacity C4 connecting valves K1
Two ends, switch K1 two ends are also connected with high tension loop.
In the present embodiment, switch K1 is the main contacts switch of relay or contactor.In the high pressure of rectifier（Such as：
750Vdc）, it is necessary to when cutting off, use relay between output and high-voltage load（Or contactor）, pass through the break-make of its contact, control
The break-make of high tension loop processed.
As shown in Figure 2-5, in the present embodiment, power supply VCC voltage is 24V, and signal input part input signal is duty
Than the square-wave signal for 70%, 150KHz, the reverse signal of square wave can be obtained and input in test point T1（Dutycycle is 30%
Square-wave signal, coordinates the high frequency transformer B1 of different parameters, is then not limited to 70%, 150KHz square-wave signal）, signal warp
Second electric capacity C2 is coupled to high frequency transformer B1 primary coils, and high frequency transformer B1 secondary coil is through two high-voltage capacitances the 3rd
Electric capacity C3, the 4th electric capacity C4 are directly connected on the switch K1 of high tension loop.During circuit carrying out practically：
（1）Work as relay（Or contactor）Main contacts K1 disconnect, that is, high frequency transformer B1 primary side open circuit, i.e.,
Second electric capacity C2 right side open circuit.Between the low period of the dutycycle square wave of input 70%, triode Q1 CE poles open circuit, electricity
Source VCC（24V）Charged through second resistance R2, the first diode D1 to the first electric capacity C1, test point T1 waveform such as Fig. 2.
First electric capacity C1 ends, i.e. test point T2 is flat for 21V galvanic currents, T2 waveform such as Fig. 3.
The DC level is through 3rd resistor R3, the 4th resistance R4 partial pressures, and test point T3 can obtain required voltage.At this
3rd resistor R3 and the 4th resistance R4 value are unsuitable too small in embodiment, to prevent on the first electric capacity C1 by overdischarge, it is impossible to protect
Hold.
（2）Work as relay（Or contactor）Main contacts K1 closure, that is, high frequency transformer B1 primary side short circuit, i.e.,
It is shorted to ground on the right side of second electric capacity C2.Between the low period of the dutycycle square wave of input 70%, triode Q1 CE poles are opened
Road, power supply VCC（24V）Charged through second resistance R2, the first diode D1 to the first electric capacity C1, while being arrived through the second electric capacity C2
Ground.Test point T1 waveform such as Fig. 4.
First electric capacity C1 ends, i.e. test point T2 is flat for 9V galvanic currents, T2 waveform such as Fig. 5.
The DC level is through R3, R4 partial pressure, and test point T3 can obtain required voltage.
In relay（Or contactor）Main contacts disconnect, test point T2 can obtain 21V DC voltages.In relay
（Or contactor）Main contacts closure, test point T2 can obtain 9V DC voltages, i.e.,：It can be disconnected, under closure state
Sufficiently large voltage difference, to be conveniently detected disconnection, closure state.In the case of the selection of different circuit parameters,
The voltage that test point T2 is obtained is different.
First resistor R1, second resistance R2 and triode Q1 are only that level is reversely used in the present embodiment, for
Different wave occurs, and this three device can be omitted.
The utility model can combine the use of the devices such as comparator, optocoupler, constitute OC outputs or disconnecting switch amount letter
Number, easily judge the closure or off-state of now contact；Or combine relay（Or contactor）Coil now it is electric,
Power failure state, can easily judge relay（Or contactor）Work it is whether normal.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted,
And all these modifications and variations should all belong to the protection domain of the utility model appended claims.
Exemplary description is carried out to the utility model patent above in conjunction with accompanying drawing, it is clear that the reality of the utility model patent
Now it is not subject to the restrictions described above, as long as the method for employing the utility model patent conceives various with technical scheme progress
Improve, or it is not improved the design of the utility model patent and technical scheme are directly applied into other occasions, in this reality
With in new protection domain.
Claims (5)
1. contacts status on-line real-time measuremen circuit in a kind of high tension loop, including signal input part, signal output part and electricity
Source VCC, it is characterised in that
The signal input part connects the first diode D1 anode, the second diode D2 negative electrode, the 3rd diode D3 respectively
Anode and the second electric capacity, the negative electrode of the first diode D1 is connected with the power supply VCC, the 3rd diode D3's
Negative electrode connects the first electric capacity C1 and 3rd resistor R3, and the 3rd resistor R3 other ends connect the 4th resistance R4, second electricity
Hold C2 other end connection high frequency transformer B1 primary coil, the other end of the primary coil of the high frequency transformer B1, institute
The other end, the other end of the first electric capacity C1 and the anode of the second resistance D2 for stating the 4th resistance R4 are grounded；
The secondary coil of the high frequency transformer B1 connects section respectively through the 3rd electric capacity C3's and the 4th electric capacity C4 connecting valves K1
Two ends, the two ends of the switch K1 are also connected with high tension loop.
2. contacts status on-line real-time measuremen circuit in high tension loop according to claim 1, it is characterised in that described to open
Close the main contacts switch that K1 is relay or contactor.
3. contacts status on-line real-time measuremen circuit in high tension loop according to claim 1, it is characterised in that the letter
Number input input signal is square-wave signal.
4. contacts status on-line real-time measuremen circuit in high tension loop according to claim 3, it is characterised in that the side
The dutycycle of ripple signal is 70%, 150KHz.
5. contacts status on-line real-time measuremen circuit in high tension loop according to claim 3, it is characterised in that the letter
Number anode of the input through over level negater circuit and the first diode D1, the second diode D2 negative electrode, the 3rd diode D3
Anode and the second capacitance connection,
The level negater circuit includes first resistor R1, second resistance R2 and triode Q1, and the signal input part passes through
First resistor R1 connecting triodes Q1 base stage, the colelctor electrode of the triode Q1 connects the second resistance R2 and described the
One diode D1 anode, the other end of the second resistance R2 connects the power supply VCC, and the emitter stage of the triode Q1 connects
Ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720013906.6U CN206460147U (en) | 2017-01-06 | 2017-01-06 | Contacts status on-line real-time measuremen circuit in a kind of high tension loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720013906.6U CN206460147U (en) | 2017-01-06 | 2017-01-06 | Contacts status on-line real-time measuremen circuit in a kind of high tension loop |
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| CN206460147U true CN206460147U (en) | 2017-09-01 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107797054A (en) * | 2017-10-23 | 2018-03-13 | 宁德时代新能源科技股份有限公司 | High voltage detection circuit and method, detector, battery system, vehicle and computer readable storage medium |
| CN108761321A (en) * | 2018-05-25 | 2018-11-06 | 蔡俊 | Branch alarm device |
| CN109116227A (en) * | 2018-09-21 | 2019-01-01 | 深圳市科列技术股份有限公司 | A kind of the main relay detection circuit and detection method of battery management system |
| CN111220930A (en) * | 2018-11-23 | 2020-06-02 | 上海海拉电子有限公司 | Electric automobile contactor, and detection device and method for on-off state of fuse |
| CN112904115A (en) * | 2021-01-20 | 2021-06-04 | 成都可为科技股份有限公司 | Pressing plate state monitoring circuit and monitoring method |
-
2017
- 2017-01-06 CN CN201720013906.6U patent/CN206460147U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107797054A (en) * | 2017-10-23 | 2018-03-13 | 宁德时代新能源科技股份有限公司 | High voltage detection circuit and method, detector, battery system, vehicle and computer readable storage medium |
| CN107797054B (en) * | 2017-10-23 | 2024-01-30 | 宁德时代新能源科技股份有限公司 | High voltage detection circuit and method, detector, battery system, vehicle and computer readable storage medium |
| CN108761321A (en) * | 2018-05-25 | 2018-11-06 | 蔡俊 | Branch alarm device |
| CN109116227A (en) * | 2018-09-21 | 2019-01-01 | 深圳市科列技术股份有限公司 | A kind of the main relay detection circuit and detection method of battery management system |
| CN111220930A (en) * | 2018-11-23 | 2020-06-02 | 上海海拉电子有限公司 | Electric automobile contactor, and detection device and method for on-off state of fuse |
| CN112904115A (en) * | 2021-01-20 | 2021-06-04 | 成都可为科技股份有限公司 | Pressing plate state monitoring circuit and monitoring method |
| CN112904115B (en) * | 2021-01-20 | 2022-11-29 | 成都可为科技股份有限公司 | Pressing plate state monitoring circuit and monitoring method |
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Address after: Three road, Longgang Street Baolong Industrial Zone Road in Longgang District of Shenzhen City, Guangdong province 518000 No. 4, A Building 1, floor 2, B building 3, floor 4, C building 3, 4 floor, building D Patentee after: Shenzhen holdluck-zyt supply technology Limited by Share Ltd Address before: Three road, Longgang Street Baolong Industrial Zone Road in Longgang District of Shenzhen City, Guangdong province 518000 No. 4, A Building 1, floor 2, B building 3, floor 4, C building 3, 4 floor, building D Patentee before: ShenZhen VAPEL Power Supply Technology Co., Ltd. |