CN105510678A - Novel alternative current high voltage acquisition circuit - Google Patents
Novel alternative current high voltage acquisition circuit Download PDFInfo
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- CN105510678A CN105510678A CN201610038687.7A CN201610038687A CN105510678A CN 105510678 A CN105510678 A CN 105510678A CN 201610038687 A CN201610038687 A CN 201610038687A CN 105510678 A CN105510678 A CN 105510678A
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- Prior art keywords
- current
- transformer
- micro
- high voltage
- circuit
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
The invention discloses a novel alternative current high voltage acquisition circuit which comprises a high voltage resistor, a micro-transformer of current, an air gap protection device and a resampling circuit, wherein the high voltage resistor is connected in series with a primary coil of the micro-transformer of current, the air gas protection device is connected between two ends of the primary coil of the micro-transformer of current, and the resampling circuit is connected between the two ends of a secondary coil of the micro-transformer of current. The novel alternative current high voltage acquisition circuit firstly converts primary high voltage into weak current signals, and then samples the weak current signals and converts the signals into secondary low voltage signals in such a manner that the structure of a secondary circuit is simpler. In addition, primary voltage is isolated from secondary voltage. Furthermore, current signals are transmitted between the primary voltage and the secondary voltage, and high resistance to interference is achieved.
Description
Technical field
The present invention relates to a kind of novel ac high voltage Acquisition Circuit.
Background technology
At present, what adopt in prior art is the collection that conventional electronic type voltage transformer carries out ac high voltage, the circuit diagram of its ac high voltage Acquisition Circuit refers to Fig. 1, what the collection of ac high voltage adopted is electric resistance partial pressure mode, by the first resistance 1' and the second resistance 2' dividing potential drop of electric resistance partial pressure unit A, the voltage at the second resistance 2' two ends is passed to secondary treating unit C by transmission line B, by the conditioning of secondary treating unit C, namely voltage follow is passed through successively, phase compensation and amplitude regulate process, send the amplitude meeting Standard, high voltage protective device 3' is provided with between the two ends of the second resistance 2'.
The shortcoming of regular alternating current high voltage Acquisition Circuit is embodied in:
(1) what transmit is voltage signal, and Signal transmissions is easily disturbed, thus introduces error, causes precision limited;
(2) directly by the high voltage induction secondary treating unit C of primary side, there is potential safety hazard;
(3) secondary side treatment circuit is complicated, and volume is larger.
Summary of the invention
The object of the invention is the defect overcoming prior art, a kind of novel ac high voltage Acquisition Circuit is provided, first convert high voltage once to weak current signal, again the small voltage signal that sample conversion becomes secondary is carried out to weak current signal, make secondary circuit structure more simple, antijamming capability is strong.
The technical scheme realizing above-mentioned purpose is: a kind of novel ac high voltage Acquisition Circuit, comprises high-tension resistive, micro-transformer of current, air gap protection device and double sampling circuit, wherein:
Described high-tension resistive is connected with the primary coil of described micro-transformer of current;
Described air gap protection device is connected between the two ends of the primary coil of described micro-transformer of current;
Described double sampling circuit is connected between the two ends of the secondary coil of described micro-transformer of current;
Described double sampling circuit comprises electric capacity, resistance and operational amplifier, described electric capacity and resistor coupled in parallel, described electric capacity is connected with the inverting input of described operational amplifier with one end of the secondary coil of described micro-transformer of current respectively with the end that connects of resistance, described electric capacity is connected with the output terminal of described operational amplifier with another end that connects of resistance, and the in-phase input end of described operational amplifier is connected with the other end of the secondary coil of described micro-transformer of current.
The novel ac high voltage Acquisition Circuit of above-mentioned one, wherein, one end ground connection of the primary coil of described micro-transformer of current.
Novel ac high voltage Acquisition Circuit of the present invention, compared with prior art, beneficial effect is embodied in:
(1) once and transmit between secondary for current signal, antijamming capability is strong;
(2) use micro-transformer of current, solve once with the Insulation Problems of secondary, make double sampling circuit safer, decrease the insulation link of secondary circuit;
(3) double sampling circuit is simple, is only the circuit that electric current is converted to voltage, thus reduces interference link, is more convenient to produce and assembling;
(4) secondary is small voltage signal, there is not the danger of short circuit blast;
(5) integrated circuit structure is simple, can do different installation by adhering designs according to use occasion.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of ac high voltage Acquisition Circuit of the prior art;
Fig. 2 is the circuit diagram of novel ac high voltage Acquisition Circuit of the present invention.
Embodiment
In order to make those skilled in the art can understand technical scheme of the present invention better, below in conjunction with accompanying drawing, its embodiment is described in detail:
Refer to Fig. 2, most preferred embodiment of the present invention, a kind of novel ac high voltage Acquisition Circuit, comprises high-tension resistive R
1, micro-transformer of current C
t1, air gap protection device 6 and double sampling circuit 5.High-tension resistive R
1with micro-transformer of current C
t1primary coil series connection; Air gap protection device 6 is connected to micro-transformer of current C
t1primary coil two ends between; Micro-transformer of current C
t1one end ground connection of primary coil.Double sampling circuit 5 is connected to micro-transformer of current C
t1secondary coil two ends between; Double sampling circuit 5 comprises electric capacity C
o, resistance R
owith operational amplifier Y
o, electric capacity C
owith resistance R
oparallel connection, electric capacity C
owith resistance R
oone connect end respectively with micro-transformer of current C
t1one end of secondary coil and operational amplifier Y
oinverting input be connected, electric capacity C
owith resistance R
oanother connect end with operational amplifier Y
ooutput terminal be connected, operational amplifier Y
oin-phase input end and micro-transformer of current C
t1secondary coil the other end be connected.
Novel ac high voltage Acquisition Circuit of the present invention, in use, high-tension resistive R
1with micro-transformer of current C
t1primary coil series connection, high-voltage power supply U
iimpose on high-tension resistive R
1with micro-transformer of current C
t1primary coil side, produce weak current signal I
1, by micro-transformer of current C
t1by electric current I
1be induced to micro-transformer of current C
t1secondary coil be electric current I
2, I
2sampled, by electric current I by double sampling circuit 5
2be converted to output voltage U
o; Air gap protection device 6 is connected to micro-transformer of current C
t1primary coil, when occur superpotential time to do the use protected, prevent high pressure from burning Micro-Transformer of Voltage C
t1and double sampling circuit 5.
In sum, novel ac high voltage Acquisition Circuit of the present invention, first converts weak current signal I to by primary voltage
1, then the small voltage signal U that sample conversion becomes secondary is carried out to weak current signal
o, make secondary circuit structure more simple; Adopting micro-transformer of current, not only delivering weak current signal once, also to once isolating with secondary; Because integrated circuit structure is simple, makes circuit board volume less, be convenient to installation by adhering.
Those of ordinary skill in the art will be appreciated that, above embodiment is only used to the present invention is described, and be not used as limitation of the invention, as long as in spirit of the present invention, all will drop in Claims scope of the present invention the change of the above embodiment, modification.
Claims (2)
1. a novel ac high voltage Acquisition Circuit, is characterized in that, comprises high-tension resistive, micro-transformer of current, air gap protection device and double sampling circuit, wherein:
Described high-tension resistive is connected with the primary coil of described micro-transformer of current;
Described air gap protection device is connected between the two ends of the primary coil of described micro-transformer of current;
Described double sampling circuit is connected between the two ends of the secondary coil of described micro-transformer of current;
Described double sampling circuit comprises electric capacity, resistance and operational amplifier, described electric capacity and resistor coupled in parallel, described electric capacity is connected with the inverting input of described operational amplifier with one end of the secondary coil of described micro-transformer of current respectively with the end that connects of resistance, described electric capacity is connected with the output terminal of described operational amplifier with another end that connects of resistance, and the in-phase input end of described operational amplifier is connected with the other end of the secondary coil of described micro-transformer of current.
2. the novel ac high voltage Acquisition Circuit of one according to claim 1, is characterized in that, one end ground connection of the primary coil of described micro-transformer of current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610038687.7A CN105510678A (en) | 2016-01-21 | 2016-01-21 | Novel alternative current high voltage acquisition circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610038687.7A CN105510678A (en) | 2016-01-21 | 2016-01-21 | Novel alternative current high voltage acquisition circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105510678A true CN105510678A (en) | 2016-04-20 |
Family
ID=55718800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610038687.7A Pending CN105510678A (en) | 2016-01-21 | 2016-01-21 | Novel alternative current high voltage acquisition circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105510678A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108872684A (en) * | 2018-09-18 | 2018-11-23 | 上海固缘电力科技有限公司 | A kind of novel passive AC current collecting circuit |
| CN109932619A (en) * | 2019-04-15 | 2019-06-25 | 长园深瑞继保自动化有限公司 | Power distribution network electronic sensor secondary singal collector |
| CN113671409A (en) * | 2021-08-12 | 2021-11-19 | 厦门京福通信有限公司 | Current acquisition protection circuit |
-
2016
- 2016-01-21 CN CN201610038687.7A patent/CN105510678A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108872684A (en) * | 2018-09-18 | 2018-11-23 | 上海固缘电力科技有限公司 | A kind of novel passive AC current collecting circuit |
| CN109932619A (en) * | 2019-04-15 | 2019-06-25 | 长园深瑞继保自动化有限公司 | Power distribution network electronic sensor secondary singal collector |
| CN109932619B (en) * | 2019-04-15 | 2022-02-22 | 长园科技集团股份有限公司 | Secondary signal collector of electronic sensor of power distribution network |
| CN113671409A (en) * | 2021-08-12 | 2021-11-19 | 厦门京福通信有限公司 | Current acquisition protection circuit |
| CN113671409B (en) * | 2021-08-12 | 2024-04-12 | 厦门京福通信有限公司 | Current acquisition protection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| CB03 | Change of inventor or designer information |
Inventor after: Hu Bin Inventor after: Zhang Qiang Inventor after: Ding Yongsheng Inventor after: Zhao Yangdong Inventor after: Yang Wenqing Inventor after: Li Ziqing Inventor before: Hu Bin Inventor before: Zhang Qiang |
|
| CB03 | Change of inventor or designer information | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20170802 Address after: 201108 Shanghai City, Minhang District Hua Jin Road No. 191 Building No. 4 Applicant after: Shanghai GoodRun Electric Power Technology Co., Ltd. Applicant after: Shanghai Zhixin Electrical Co., Ltd. Address before: 201108 Shanghai City, Minhang District Hua Jin Road No. 191 Building No. 4 Applicant before: Shanghai GoodRun Electric Power Technology Co., Ltd. |
|
| TA01 | Transfer of patent application right | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160420 |
|
| WD01 | Invention patent application deemed withdrawn after publication |