CN106712482A - Anti-thunder and input polarity automatic adjusting electric current loop interface adapter - Google Patents
Anti-thunder and input polarity automatic adjusting electric current loop interface adapter Download PDFInfo
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- CN106712482A CN106712482A CN201710078959.0A CN201710078959A CN106712482A CN 106712482 A CN106712482 A CN 106712482A CN 201710078959 A CN201710078959 A CN 201710078959A CN 106712482 A CN106712482 A CN 106712482A
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- input
- output end
- electric current
- electric capacity
- egnd
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- 239000003990 capacitor Substances 0.000 claims abstract description 11
- 238000005259 measurement Methods 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000001939 inductive effect Effects 0.000 abstract 1
- 230000006378 damage Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/002—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention discloses an anti-thunder and input polarity automatic adjusting electric current loop interface adapter. The adapter comprises an input end (1) and an output end (5). The input end (1) comprises three interfaces I1,I2 and EGND. The output end (5) comprises three interfaces I+, I- and EGND. A TVS tube (2), a rectifier bridge (3), a common mode filter (4) and a filter capacitor are arranged in order between the input end (1) and the output end (5); the filter capacitor comprises a capacitor C1, a capacitor C2 and a capacitor C3 which are connected in order to form a loop. The anti-thunder and input polarity automatic adjusting electric current loop interface adapter can observably improve the anti-jamming capability of the instrument and the system and inhibit the damaging of a high field and an inductive thunder to a device, users do not need distinguish the positive and negative anodes when performing wiring at the input end so as to avoid the device damaging caused by polarity connection error, and the anti-thunder and input polarity automatic adjusting electric current loop interface adapter is applied in the application occasions of a 4-20mA current transmission circuit for measurement of a resonance density meter and each 4-20mA electric current loop and is especially suitable for the application in the resonance density meter applied in a mine dressing plant.
Description
Technical field
The invention belongs to measure and control instrument technical field, and in particular to a kind of 4-20mA electricity for resonant mode densimeter measurement
Streaming circuit, while being also suitable various 4-20mA electric current loops application scenarios, is particularly suitable for the resonance in mine concentration application
Applied in formula densitometer.
Background technology
Electric current loop is a kind of analogue communication mode, compared with various modern digital communication modes, the volume that it need not be complicated
Code, decoding effort, communication mode are simple；With antijamming capability higher, have very in the complicated industry spot of noise circumstance
Reliability high.
At present, there is following defect in existing current loop circuit：
(1) applied under forceful electric power magnetic environment, be easily introduced electromagnetic interference, have influence on the stability of system；
(2) when applying in the wild, it is easily introduced thunder and lightning and causes instrument or device systems to damage；
(3) wiring is it is noted that distinguish positive-negative polarity, and the connection of mistake can cause the signal can not to transmit, or even can cause interface
Circuit is damaged.
To solve the above mentioned problem that electric current loop interface circuit is present,《Magnificent power technology》" the 4-20mA that in December, 2013 delivers
Visited for the Radio frequency interference problem that current loop is met with the anti-Radio frequency interference research of an electric current output loop " text
Beg for, the measure taken is to set magnetic bead in the line to suppress High-frequency Interference.《Electronic Design and application》What the 8th phase in 2006 delivered
" application of 4-20mA electric current loop isolating interface chip ids C3516 " text is referred to IDC3516 chips, and the chip can realize electricity
Stream ring electrical isolation, electromagnetic interference signal is eliminated by electrical isolation.
Above-mentioned existing measure be locality and not into system, can only functionally suppress and eliminate electromagnetic interference letter
Number, it is impossible to meet the lightning protection requirement of electric current loop interface circuit, can not realize being input into the function of polarity adjust automatically.
The content of the invention
In order to overcome deficiencies of the prior art, the invention provides a kind of circuit performance stabilization, reliability it is high,
Jamproof lightning protection, the electric current ring interface adapter of input polarity adjust automatically, effectively suppression electromagnetic interference signal can lead to
Overcurrent loop circuit, prevents infringement of the thunder and lightning to device systems, user need not distinguish both positive and negative polarity in wiring, it is to avoid wiring is wrong
The damage of equipment is caused by mistake.
To realize above-mentioned purpose of the invention, a kind of lightning protection of the invention, the electric current ring interface of input polarity adjust automatically are fitted
Orchestration uses following technical scheme：
A kind of lightning protection of the present invention, the electric current ring interface adapter of input polarity adjust automatically include input, output end.Institute
The input stated contains tri- interfaces of I1, I2, EGND, and described output end contains tri- interfaces of I+, I-, EGND, input,
TVS pipe, rectifier bridge, common-mode filter and filter capacitor are also sequentially between output end；Described filter capacitor contains electric capacity
C1, electric capacity C2, electric capacity C3, electric capacity C1, electric capacity C2, electric capacity C3 are linked in sequence and form loop.The I1 of the input passes through TVS
The Z1 of pipe meets EGND, and the I2 of the input meets EGND by the Z2 of TVS pipe, and the I1 of the input is connected by the Z3 of TVS pipe
Meet I2.The AC1 ends of the rectifier bridge connect the I1 of input, and the AC2 ends of the rectifier bridge connect the I2 of input, the rectification
The output end DC+ of bridge connects first input pin of common-mode filter；The output end DC- connection common mode filterings of the rectifier bridge
Second input pin of device.The I+ of the output end is connected with the first output pin of common-mode filter, the output end
I- is connected with the second output pin of common-mode filter, and the I+ of the output end is connected by electric capacity C1 with EGND, the output
The I- at end is connected by electric capacity C2 with EGND, and the I+ of the output end is connected by electric capacity C3 with the I- of output end.
It is enhancing antijamming capability, suppresses the destruction of highfield and induced lightening to equipment, adapts to resonant mode densimeter measurement
The demand of the measuring environment particularly adverse circumstances such as iron mine beneficiation factory forceful electric power magnetic environment, strong noise environment, described rectifier bridge
Using DB107, described common-mode filter uses Z1, Z2 of SCM7038F, described TVS pipe all to use P6KE36A, described
The Z3 of TVS pipe uses P6KE36CA.
A kind of lightning protection of the present invention, the operation principle of the electric current ring interface adapter of input polarity adjust automatically are：
When input I1 for just, I2 for it is negative when, make after the rectified bridge rectification of input current the I+ of output end for just, I- be
It is negative.When input I1 for negative, I2 be timing, make after the rectified bridge rectification of input current output end still with I+ as just, I- be
It is negative.
When interference signal is introduced by the I1 and I2 of input, interference signal presses down through common-mode filter and electric capacity C1, C2, C3
System and filter, it is to avoid influence of the interference signal to exporting.
When thunder and lightning is incorporated into input, when thunder and lightning high pressure is higher than the threshold voltage of TVS pipe, TVS pipe conducting high pressure is passed through
AGND ends are released to the earth, it is to avoid destruction of the thunder and lightning high pressure to rear class.
After a kind of lightning protection of the present invention, the electric current ring interface adapter of input polarity adjust automatically use above technical scheme,
With advantages below：The destruction of the antijamming capability, suppression highfield and induced lightening of instrument and system to equipment is remarkably improved,
User need not distinguish both positive and negative polarity when terminated line is input into, it is to avoid polarity connection error causes device damage.
Brief description of the drawings
Fig. 1 is a kind of lightning protection of the invention, the electric current loop interface adapter circuit theory diagram of input polarity adjust automatically；
Fig. 2 is invention lightning protection, the electric current loop interface adapter circuit structural nexus of input polarity adjust automatically
Schematic diagram.
Reference is：1- inputs；2-TVS is managed；3- rectifier bridges；4- common-mode filters；5- output ends, a- common mode filterings
First output pin of device, the first output pin of b- common-mode filters, the second output pin of c- common-mode filters, d- common modes
Second input pin of wave filter.
Specific embodiment
With reference to the accompanying drawings and examples to a kind of lightning protection of invention, the electric current ring interface adapter of input polarity adjust automatically
It is described in further details.
Of the invention a kind of lightning protection as shown in Figure 1, the electric current loop interface adapter circuit principle of input polarity adjust automatically
Block diagram simultaneously finds out with reference to Fig. 2, lightning protection of the present invention, the electric current ring interface adapter of input polarity adjust automatically be by input 1,
TVS pipe 2, rectifier bridge 3, common-mode filter 4, filter capacitor, the order connection of output end 5 are constituted, described input 1 containing I1,
Tri- interfaces of I2, EGND, described output end 5 contains tri- interfaces of I+, I-, EGND, described filter capacitor contain electric capacity C1,
Electric capacity C2, electric capacity C3, electric capacity C1, electric capacity C2, electric capacity C3 are linked in sequence and form loop；Described rectifier bridge 3 is DB107, institute
The common-mode filter 4 stated is SCM7038F.
The I1 of the input 1 meets EGND by the Z1 of TVS pipe 2, and the I2 of the input 1 is connect by the Z2 of TVS pipe 2
EGND, the I1 of the input 1 connects I2 by the Z3 of TVS pipe；Z1, Z2 of described TVS pipe 2 all use P6KE36A, described
The Z3 of TVS pipe 2 use P6KE36CA.
The AC1 ends of the rectifier bridge 3 connect the I1 of input 1, and the AC2 ends of the rectifier bridge 3 connect the I2 of input 1,
The output end DC+ of the rectifier bridge 3 connects first input pin a, the output end DC- of the rectifier bridge 3 of common-mode filter 4
Connect second input pin d of common-mode filter 4；The I+ of the output end 5 and the first output pin b of common-mode filter 4
Connection, the I- of the output end 5 is connected with the second output pin c of common-mode filter 4, and the I+ of the output end 5 passes through electric capacity
C1 is connected with EGND；The I- of the output end 5 is connected by electric capacity C2 with EGND, the I+ of the output end 5 by electric capacity C3 with
The I- connections of output end 5.
A kind of lightning protection of the present invention, input polarity adjust automatically electric current ring interface adapter in resonant mode densitometer and
Applied in other mining survey instrument, the live application practice more than 2 years is proved, the present invention has circuit performance stabilization, reliability
It is high, can lightning protection, good in anti-interference performance the characteristics of, technique effect, economic effect are obvious.
Claims (2)
1. a kind of lightning protection, the electric current ring interface adapter of input polarity adjust automatically, including input (1), output end (5), its
It is characterised by：Described input (1) contains I+, I-, EGND containing tri- interfaces of I1, I2, EGND, described output end (5)
Three interfaces, are also sequentially with TVS pipe (2), rectifier bridge (3), common-mode filter (4) between input (1), output end (5)
And filter capacitor；Described filter capacitor contains electric capacity C1, electric capacity C2, electric capacity C3, and electric capacity C1, electric capacity C2, electric capacity C3 orders connect
Connect and formed loop；
The I1 of the input (1) meets EGND by the Z1 of TVS pipe (2), and the I2 of the input (1) passes through the Z2 of TVS pipe (2)
EGND is met, the I1 of the input (1) connects I2 by the Z3 of TVS pipe；
The I1 at AC1 ends connection input (1) of the rectifier bridge (3), AC2 ends connection input (1) of the rectifier bridge (3)
I2, first input pin (a) of output end DC+ connections common-mode filter (4) of the rectifier bridge (3), the rectifier bridge (3)
Output end DC- connection common-mode filter (4) second input pin (d)；
The I+ of the output end (5) is connected with the first output pin (b) of common-mode filter (4), the I- of the output end (5) with
Second output pin (c) connection of common-mode filter (4), the I+ of the output end (5) is connected by electric capacity C1 with EGND；It is described
The I- of output end (5) is connected by electric capacity C2 with EGND, and the I+ of the output end (5) is by the electric capacity C3 and I- of output end (5)
Connection.
2. a kind of lightning protection as claimed in claim 1, the electric current ring interface adapter of input polarity adjust automatically, its feature exist
In：Described rectifier bridge (3) is DB107, and described common-mode filter (4) is SCM7038F；Z1, Z2 of described TVS pipe (2)
P6KE36A, the Z3 of described TVS pipe (2) is all used to use P6KE36CA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710078959.0A CN106712482A (en) | 2017-02-14 | 2017-02-14 | Anti-thunder and input polarity automatic adjusting electric current loop interface adapter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710078959.0A CN106712482A (en) | 2017-02-14 | 2017-02-14 | Anti-thunder and input polarity automatic adjusting electric current loop interface adapter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106712482A true CN106712482A (en) | 2017-05-24 |
Family
ID=58909174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710078959.0A Pending CN106712482A (en) | 2017-02-14 | 2017-02-14 | Anti-thunder and input polarity automatic adjusting electric current loop interface adapter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106712482A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2379966Y (en) * | 1999-07-20 | 2000-05-24 | 张丽华 | Non-polar inputting dc current device |
| CN201616675U (en) * | 2009-12-31 | 2010-10-27 | 西安开容电子技术有限责任公司 | Transient prevention and stable state combined interference power supply filter |
| CN205692164U (en) * | 2016-05-24 | 2016-11-16 | 深圳市赛盛技术股份有限公司 | A kind of RS422 interface electromagnetic compatible design circuit |
| CN206506449U (en) * | 2017-02-14 | 2017-09-19 | 中钢集团马鞍山矿山研究院有限公司 | Can adjust automatically polarity electric current loop lightning protection interface adapter |
-
2017
- 2017-02-14 CN CN201710078959.0A patent/CN106712482A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2379966Y (en) * | 1999-07-20 | 2000-05-24 | 张丽华 | Non-polar inputting dc current device |
| CN201616675U (en) * | 2009-12-31 | 2010-10-27 | 西安开容电子技术有限责任公司 | Transient prevention and stable state combined interference power supply filter |
| CN205692164U (en) * | 2016-05-24 | 2016-11-16 | 深圳市赛盛技术股份有限公司 | A kind of RS422 interface electromagnetic compatible design circuit |
| CN206506449U (en) * | 2017-02-14 | 2017-09-19 | 中钢集团马鞍山矿山研究院有限公司 | Can adjust automatically polarity electric current loop lightning protection interface adapter |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170524 |
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| RJ01 | Rejection of invention patent application after publication |