CN100495847C - Reverse current measurement and control system (SDA-N) - Google Patents
Reverse current measurement and control system (SDA-N) Download PDFInfo
- Publication number
- CN100495847C CN100495847C CNB2006100188054A CN200610018805A CN100495847C CN 100495847 C CN100495847 C CN 100495847C CN B2006100188054 A CNB2006100188054 A CN B2006100188054A CN 200610018805 A CN200610018805 A CN 200610018805A CN 100495847 C CN100495847 C CN 100495847C
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- CN
- China
- Prior art keywords
- resistance
- amplifier
- triode
- another termination
- feedback regulation
- Prior art date
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Abstract
The related invention adds a composite triode on output circuit of current dc large-current Hall direct-detective sensor, detects both the forward and backward current simultaneously, and outputs the positive/negative value when the dc power rectifying device outputs positive/negative current.
Description
Technical field
A kind of product that direct current forward current and reverse current are detected simultaneously and provide forward to cross flow control signals and reverse counterflow control signal is provided, is widely used in the dc suppling equipment measurement and control area of industries such as electric smelting, electrochemistry, electric traction.
Background technology
In the prior art, the direct current detection product sensor does not still possess and detects direct current forward current and reverse current function simultaneously, transducer must rely on another attachment device just can finish the adverse current measuring ability when detecting reverse current, and slow (〉 2mS of the response time of the corresponding tested electric current of electric current to be measured), complex structure, install and use inconvenience; Supporting with it measurement and control instrument is the general electronic products structure, the control signal output contact that the charactron indication window is only arranged and can not set, and control mode falls behind, poor reliability, misoperation rate height.
Summary of the invention
The purpose of this invention is to provide a kind of adverse current TT﹠C system that DC power supply rectifying installation both forward and reverse directions electric current is carried out observing and controlling.
The object of the present invention is achieved like this: the adverse current TT﹠C system is characterized in that: by first resistance, integrated operatinoal amplifier LM
324, second resistance, NPN triode, PNP triode, the 3rd resistance, feedback regulation potentiometer and the 4th resistance forms the in-phase signal amplifier, NPN triode and PNP triode are formed hybrid power tube, the 3rd resistance, feedback regulation potentiometer and the 4th resistance adjustment amplifier scale parameter, filter capacitor is to output signal filtering, the 5th resistance output voltage clamper;
Its circuit connecting relation is: by a termination integrated operatinoal amplifier LM of first resistance
324In-phase input end, integrated operatinoal amplifier LM
324An end of output termination second resistance, another termination NPN triode of second resistance and the base stage of PNP triode, the collector electrode of NPN triode connects second working power, the collector electrode of PNP triode connects first working power, after linking to each other, the emitting stage of NPN triode and PNP triode connects an end of filter capacitor, the 5th resistance, the 3rd resistance, another termination working power ground of filter capacitor, the 5th resistance, one end of another termination feedback regulation potentiometer of the 3rd resistance, the central point of feedback regulation potentiometer meets integrated operatinoal amplifier LM
324Inverting input, an end of another termination the 4th resistance of feedback regulation potentiometer, another termination working power ground of the 4th resistance.
Purpose of the present invention can also realize like this: the in-phase signal amplifier input terminal is by another termination Hall element of first resistance, the voltage of collection and export the adverse current detector that an end that connects filter capacitor, the 5th resistance, the 3rd resistance after emitting stage by NPN triode and PNP triode links to each other connects intelligent liquid crystal graphical display again.
Utilize the two-way output characteristic of Hall element and the detection principle that both forward and reverse directions magnetic field that electric current produces all is directly proportional on the principle of the invention, on the circuit of original D.C. high-current Hall direct measuring type transducer, add compound transistor, when the DC power supply rectifying installation goes out forward current, output circuit output on the occasion of; When the DC power supply rectifying installation goes out reverse current, output circuit output negative value.In conjunction with accurate computerized intelligent liquid crystal graphical display controller, one of composition overlaps and can accurately measure the DC power supply rectifying installation, and provides the band value scope and time scope difference of taking back that judgement is set to control the TT﹠C system of guard signal contact.
Owing to adopted the present invention, can go out forward and reverse electric current by correct measurement, and simple in structure, easy to operate.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is a sensor schematic diagram of the present invention.
Fig. 2 is a system works schematic diagram of the present invention.
Fig. 3 is the secondary power output amplifier circuit figure of Ben Fabenming.
In the drawings: 1. conductive bus bar; 2. transducer iron core; 3. Hall element; 4. constant-current source; 5. balance amplifier; 6. working sensor power supply; 7. temperature-compensating Switching Power Supply; 8. secondary power amplifier; 9. secondary power amplifier; 10. positive direction output voltage; 11. opposite direction output voltage; 12. rectifier cabinet dc bus; 13. adverse current detecting sensor; 14. adverse current detector; 15. forward is crossed flow control signals; 16. output signal; 17. trip(ping) circuit; 18. Rectification Power Factor; 19. DC-isolation switch.
Among Fig. 3: R
06---first resistance; LM
324-integrated operatinoal amplifier; R
28-the second resistance; Q
1-NPN triode; Q
2-PNP triode; R
36-the three resistance; W
2-feedback regulation potentiometer; R
37-the four resistance; R
01-the five resistance; C
9-filter capacitor; V
SS-the first working power
Embodiment
The sensor principle is seen when accompanying drawing 1 conductive bus bar 1 passes transducer iron core 2, tested electric current produces a magnetic field B that is directly proportional with tested electric current by conductive bus bar 1 in transducer iron core 2, the magnetic induction Hall element 3 that is installed in transducer iron core 2 air gaps produces the voltage signal V that is directly proportional with magnetic field B again, this signal is after multichannel balance amplifier 5 is handled, deliver to secondary power output amplifier 8 and 9, export positive direction or reciprocal output voltage 10 and 11 that are directly proportional with measured value at last respectively; The 4th, the constant-current source of Hall element exciting current, the 6th, the working sensor power supply, 7 are the temperature-compensating Switching Power Supply.
The system works principle sees that accompanying drawing 2 adverse current detecting sensors 13 are installed in rectifier cabinet dc bus 12 anodal places.When the adverse current checkout gear detects with the equivalent reverse current of forward current 10% (user can from set); the output contact of adverse current detector 14 just output signal 16 goes Rectification Power Factor AC side control protection trip(ping) circuit 17; circuit breaker cuts off net side power supply; avoid accident further to enlarge, write down out-of-limit value of backward current and time simultaneously.15 cross flow control signals for forward, and 18 is Rectification Power Factor, and 19 is the DC-isolation switch.
The circuit diagram of secondary power output amplifier sees that accompanying drawing 3 its circuit structures are: first resistance R
06A termination Hall element 3, another termination integrated operatinoal amplifier LM
324In-phase input end, integrated operatinoal amplifier LM
324Output termination second resistance R
28An end, second resistance R
28Another termination NPN triode Q
1With PNP triode Q
2Base stage, NPN triode Q
1Collector electrode connect second working power, PNP triode Q
2Collector electrode meet the first working power Vss, NPN triode Q
1With PNP triode Q
2Emitting stage meet filter capacitor C after linking to each other
9, the 5th resistance R
01, the 3rd resistance R
36An end and the adverse current detector 14 of intelligent liquid crystal graphical display, filter capacitor C
9, the 5th resistance R
01Another termination working power ground, the 3rd resistance R
36Another termination feedback regulation potentiometer W
2An end, feedback regulation potentiometer W
2Central point meet integrated operatinoal amplifier LM
324Inverting input, feedback regulation potentiometer W
2Another termination the 4th resistance R
37An end, the 4th resistance R
37Another termination working power ground.
NPN triode Q
1With PNP triode Q
2Form composite amplifier, the voltage signal V that the Hall element treatment conversion becomes is through integrated operatinoal amplifier LM
324, composite amplifier amplifies output.When V is positive signal, integrated operatinoal amplifier LM
324The output positive signal, NPN triode Q
1Conducting, PNP triode Q
2End, export positive signal; When V is negative signal, integrated operatinoal amplifier LM
324The signal that output is negative, PNP triode Q
2Conducting, NPN triode Q
1End the signal that output is negative.First resistance R
06, integrated operatinoal amplifier LM
324, second resistance R
28, NPN triode Q
1, PNP triode Q
2, the 3rd resistance R
36, feedback regulation potentiometer W
2With the 4th resistance R
37Form the in-phase signal amplifier, NPN triode Q
1With PNP triode Q
2Form hybrid power tube, the 3rd resistance R
36, feedback regulation potentiometer W
2With the 4th resistance R
37Regulate the amplifier scale parameter, filter capacitor C
9To output signal filtering, the 5th resistance R
01The output voltage clamper.
Claims (2)
1, adverse current TT﹠C system is characterized in that: by the first resistance (R
06), integrated operatinoal amplifier LM
324, the second resistance (R
28), NPN triode (Q
1), PNP triode (Q
2), the 3rd resistance (R
36), feedback regulation potentiometer (W
2) and the 4th resistance (R
37) composition in-phase signal amplifier, NPN triode (Q
1) and PNP triode (Q
2) the composition hybrid power tube, the 3rd resistance (R
36), feedback regulation potentiometer (W
2) and the 4th resistance (R
37) adjusting amplifier scale parameter, filter capacitor (C
9) to output signal filtering, the 5th resistance (R
01) the output voltage clamper;
Its circuit connecting relation is: by the first resistance (R
06) a termination integrated operatinoal amplifier LM
324In-phase input end, integrated operatinoal amplifier LM
324The output termination second resistance (R
28) an end, the second resistance (R
28) another termination NPN triode (Q
1) and PNP triode (Q
2) base stage, NPN triode (Q
1) collector electrode connect second working power, PNP triode (Q
2) collector electrode connect first working power (Vss), NPN triode (Q
1) and PNP triode (Q
2) emitting stage meet filter capacitor (C after linking to each other
9), the 5th resistance (R
01), the 3rd resistance (R
36) an end, filter capacitor (C
9), the 5th resistance (R
01) another termination working power ground, the 3rd resistance (R
36) another termination feedback regulation potentiometer (W
2) an end, feedback regulation potentiometer (W
2) central point meet integrated operatinoal amplifier LM
324Inverting input, feedback regulation potentiometer (W
2) another termination the 4th resistance (R
37) an end, the 4th resistance (R
37) another termination working power ground.
2, adverse current TT﹠C system according to claim 1 is characterized in that: the in-phase signal amplifier input terminal is by the first resistance (R
06) another termination Hall element (3), the voltage of collection and output by NPN triode (Q
1) and PNP triode (Q
2) emitting stage meet filter capacitor (C after linking to each other
9), the 5th resistance (R
01), the 3rd resistance (R
36) an end connect the adverse current detector (14) of intelligent liquid crystal graphical display again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100188054A CN100495847C (en) | 2006-04-18 | 2006-04-18 | Reverse current measurement and control system (SDA-N) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100188054A CN100495847C (en) | 2006-04-18 | 2006-04-18 | Reverse current measurement and control system (SDA-N) |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101060240A CN101060240A (en) | 2007-10-24 |
| CN100495847C true CN100495847C (en) | 2009-06-03 |
Family
ID=38866186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100188054A Expired - Fee Related CN100495847C (en) | 2006-04-18 | 2006-04-18 | Reverse current measurement and control system (SDA-N) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100495847C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628891A (en) * | 2012-04-28 | 2012-08-08 | 航天科技控股集团股份有限公司 | Detection system and detection method for positive-inverse current single loop based on controller area network (CAN) |
| CN109342958A (en) * | 2018-10-10 | 2019-02-15 | 四川赛蒙科技有限公司 | A kind of new energy car battery monitoring system |
-
2006
- 2006-04-18 CN CNB2006100188054A patent/CN100495847C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101060240A (en) | 2007-10-24 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090603 Termination date: 20160418 |