CN2329012Y - Isolated amplifier for monitoring DC power supply equipment - Google Patents
Isolated amplifier for monitoring DC power supply equipment Download PDFInfo
- Publication number
- CN2329012Y CN2329012Y CN 98230482 CN98230482U CN2329012Y CN 2329012 Y CN2329012 Y CN 2329012Y CN 98230482 CN98230482 CN 98230482 CN 98230482 U CN98230482 U CN 98230482U CN 2329012 Y CN2329012 Y CN 2329012Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- frequency
- voltage
- power supply
- converting circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to an isolated amplifier for monitoring DC power supply equipment, composed of a sampling circuit 1, a voltage-frequency converting circuit 2, a photoelectricity coupling circuit 3, and a frequency-voltage converting circuit 4. The sampling circuit 1, the voltage-frequency converting circuit 2, the photoelectricity coupling circuit 3, and the frequency-voltage converting circuit 4 are connected in series in sequence, the sampling circuit 1 is connected with a foot 7 of an integrated block IC2 of the voltage-frequency converting circuit 2, and the photoelectricity coupling circuit 3 is connected with a foot 6 of an integrated block IC2 of the frequency-voltage converting circuit 4. The utility model has the advantages of simple structure, easy manufacture, small size, good performance, and stable and reliable parameter, can completely realize an electrical isolation between an input and an output signals, and is suitable for being used as a replacing product of an isolating amplifier of the existing DC power supply equipment.
Description
The utility model is a kind of isolated amplifier that is used for the dc suppling equipment monitoring.
In the computer supervisory control system of communication power, the high-acruracy survey of dc electric apparatus equipment simulating amount signal is absolutely necessary, in order to ensure monitoring target and monitoring equipment separately safety, work reliably, unlikely influencing each other generally all adopted the isolated amplifier of function admirable.At present, isolated amplifier is distinguished according to principle of work and mainly contained two big classes: a class is that high-frequency transformer is isolated, as products such as the product A D202/204 of U.S. ANALOG DEVICES company; One class is the compensation product of photoelectricity.The former function admirable, the one-piece construction volume is little, but it costs an arm and a leg; Latter's cost is low, but because of the intrinsic factor on its principle usually with such as weak points such as nonlinearity erron, temperature drifts.
The purpose of this utility model is to overcome the deficiency of prior art and provides a kind of simple in structure, dependable performance, precision height, the isolated amplifier that is used for the dc suppling equipment monitoring easy for operation.
The utility model is to adopt following proposal to realize: it is made of sample circuit 1, voltage frequency conversioning circuit 2, photoelectricity coupled circuit 3, frequency-voltage conversion circuit 4.Described sample circuit 1, voltage frequency conversioning circuit 2, photoelectricity coupled circuit 3, frequency-voltage conversion circuit 4 are connected in series successively, and sample circuit 1 connects ic chip in the voltage frequency conversioning circuit 2
27 pin, photoelectricity coupled circuit 3 connects ic chip in the frequency-voltage conversion circuit 4
26 pin.
Concrete structure of the present utility model describes in detail below in conjunction with accompanying drawing:
Accompanying drawing 2 is the utility model electrical schematic diagram.
See accompanying drawing 1,2, the utility model electricity sample circuit 1, voltage frequency conversioning circuit 2, photoelectricity coupled circuit 3, voltage to frequency conversion electrical equipment 4 constitute, described sample circuit 1, voltage frequency conversioning circuit 2, photoelectricity coupled circuit 3, frequency-voltage conversion circuit 4 are connected in series successively, and sample circuit 1 connects ic chip in the voltage frequency conversioning circuit 2
17 pin, the output of photoelectricity coupled circuit 3 connects ic chip in the frequency-voltage conversion circuit 4
26 pin, sample circuit 1 is by resistance R
1, R
12, R
13, capacitor C
1Constitute, voltage frequency conversioning circuit 2 is by ic chip
1, diode Z
1, Z
2, capacitor C
2, CL
1, resistance R
2-R
5, RL
1Form, photoelectricity coupled circuit 3 is by photoelectrical coupler IC
3Form, frequency-voltage conversion circuit 4 is by resistance R
8-R
11, R
s, RL
2, capacitor C
3, C
4, CL
2, ic chip
2Form.
In the utility model, the integrated package model is: IC
1, IC
2Be LM331, IC
3Be 4N25.
Principle of work of the present utility model is summarized as follows: take from the power-equipment-48V voltage is by JK.Input is after R
12, R
10Dividing potential drop is as analog signals, through R
2By IC
17 pin send in the voltage frequency conversioning circuit 2,48V is through Z
1, Z
2Reduce to below the 24V, supply with IC
1Power supply, R
1-R
5, C
1, C
2, RL
1Deng and IC
1Deng constituting electric voltage/frequency converter, be will input the analog quantity voltage conversion of signals frequency signal that becomes to be directly proportional with it, by IC
13 pin output through R
4To photoelectrical coupler IC
3, 1: 1 ground of this frequency signal is sent to by R
6-R
11, R
1, RL
2, C
3, C
4, CL
2Deng the frequency-voltage conversion circuit of forming 4, frequency signal is converted to the voltage output that is directly proportional with it.This shows output voltage V.Be proportional to input signal, but output with import between realized isolation fully on electric.
In sum, the utility model is simple in structure, and processing and manufacturing is easy, volume is little, function admirable, and parameter stability is reliable, can realize fully importing, the electrical isolation between the output signal, be suitable for renewal product as the isolated amplifier of existing dc suppling equipment monitoring.
Claims (1)
- The isolated amplifier that is used for the dc suppling equipment monitoring, comprise sample circuit (1), voltage frequency conversioning circuit (2), photoelectricity coupled circuit (3), voltage to frequency conversion electrical equipment (4), it is characterized in that sample circuit (1), voltage frequency conversioning circuit (2), photoelectricity coupled circuit (3), frequency-voltage conversion circuit (4) are connected in series successively, and sample circuit (1) connects 7 pin of ic chip in the voltage frequency conversioning circuit (2), and the output of photoelectricity coupled circuit (3) meets integrated package I in the frequency-voltage conversion circuit (4) 1C 26 pin, sample circuit (1) is by resistance R 1, R 12, R 13, capacitor C 1Constitute, voltage frequency conversioning circuit (2) is by ic chip, diode Z 1, Z 2, capacitor C 2, CL 1, resistance R 2-R 5, RL 1Form, photoelectricity coupled circuit (3) is by photoelectrical coupler IC 3Form, frequency-voltage conversion circuit (4) is by resistance R 8-R 11, R 8, RL 2, capacitor C 3, C 4, CL 2, ic chip 2Form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98230482 CN2329012Y (en) | 1998-04-06 | 1998-04-06 | Isolated amplifier for monitoring DC power supply equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98230482 CN2329012Y (en) | 1998-04-06 | 1998-04-06 | Isolated amplifier for monitoring DC power supply equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2329012Y true CN2329012Y (en) | 1999-07-14 |
Family
ID=33980115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98230482 Expired - Fee Related CN2329012Y (en) | 1998-04-06 | 1998-04-06 | Isolated amplifier for monitoring DC power supply equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2329012Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611314A (en) * | 2012-03-16 | 2012-07-25 | 南通金枫电气有限公司 | Voltage feedback isolation circuit |
| CN102937666A (en) * | 2012-11-21 | 2013-02-20 | 昆山北极光电子科技有限公司 | Method for non-contact measurement of spike voltage of generator |
| CN105092933A (en) * | 2015-06-03 | 2015-11-25 | 大连市旅顺电力电子设备有限公司 | Direct switch type online voltage monitoring apparatus for storage battery and method thereof |
| CN105092954A (en) * | 2015-06-03 | 2015-11-25 | 大连市旅顺电力电子设备有限公司 | Novel online voltage monitoring apparatus for storage battery and method thereof |
| CN105223390A (en) * | 2015-10-20 | 2016-01-06 | 天水七四九电子有限公司 | A kind of capacitance coupling type isolated amplifier |
-
1998
- 1998-04-06 CN CN 98230482 patent/CN2329012Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611314A (en) * | 2012-03-16 | 2012-07-25 | 南通金枫电气有限公司 | Voltage feedback isolation circuit |
| CN102937666A (en) * | 2012-11-21 | 2013-02-20 | 昆山北极光电子科技有限公司 | Method for non-contact measurement of spike voltage of generator |
| CN105092933A (en) * | 2015-06-03 | 2015-11-25 | 大连市旅顺电力电子设备有限公司 | Direct switch type online voltage monitoring apparatus for storage battery and method thereof |
| CN105092954A (en) * | 2015-06-03 | 2015-11-25 | 大连市旅顺电力电子设备有限公司 | Novel online voltage monitoring apparatus for storage battery and method thereof |
| CN105092954B (en) * | 2015-06-03 | 2017-12-08 | 大连市旅顺电力电子设备有限公司 | New on-Line Voltage monitoring device and its method for batteries |
| CN105092933B (en) * | 2015-06-03 | 2017-12-12 | 大连市旅顺电力电子设备有限公司 | Direct transform on-Line Voltage monitoring device and its method for batteries |
| CN105223390A (en) * | 2015-10-20 | 2016-01-06 | 天水七四九电子有限公司 | A kind of capacitance coupling type isolated amplifier |
| CN105223390B (en) * | 2015-10-20 | 2019-01-18 | 天水七四九电子有限公司 | A kind of capacitance coupling type isolated amplifier |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |