CN200979866Y - An intelligent release of a build-in voltage sensor - Google Patents
An intelligent release of a build-in voltage sensor Download PDFInfo
- Publication number
- CN200979866Y CN200979866Y CN 200620151531 CN200620151531U CN200979866Y CN 200979866 Y CN200979866 Y CN 200979866Y CN 200620151531 CN200620151531 CN 200620151531 CN 200620151531 U CN200620151531 U CN 200620151531U CN 200979866 Y CN200979866 Y CN 200979866Y
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- voltage
- operational amplifier
- voltage sensor
- current mode
- circuit
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Abstract
The utility model relates to an intelligent electrical release apparatus with an internal voltage sensor, comprising a voltage pick up circuit comprising a current mode voltage sensor and an universal operational amplifier, wherein the primary winding of the current mode voltage sensor tandem connected with a resistance is connected with an input terminal of the testing voltage, the secondary end of the current mode voltage sensor is respectively connected with two inputs of the universal operational amplifier, the positive electrode of the operational amplifier is connected to the earth ground, the passive electrode and the output of the operational amplifier are connected with a parallel circuit composed of a resistance and a capacitance, the output of the operational amplifier is connected with a voltage output terminal. The utility model isolates the measure circuit from the main circuit, to prevent the dangerous high pressure to damage the electrical circuit. And the utility model can avoid the signal linear distortion to improve the acquisition accuracy. Only one high power resistor is needed, and the others are all low power electrical components, therefore the power consumed by the voltage acquisition is limited, and the heat radiation is decreased, thereby fitting the environmental protection request of green electric appliance.
Description
Affiliated technical field
The utility model belongs to a kind of intelligent electrical apparatus release, particularly relates to a kind of intelligent electrical apparatus release of built-in voltage transducer.
Background technology
Intelligent electrical apparatus release is the core component of intelligent circuit breaker, and the intelligent electrical apparatus release of high type also detects voltage except detecting electric current and protection overload, protects owing faults such as overvoltage and harmonic wave.At present, the intelligent electrical apparatus release of high type generally adopts the method for electric resistance partial pressure to gather voltage signal, and bring some problems like this: at first, measuring circuit does not have electrical isolation with major loop; Secondly, the precision of sampling is subjected to the influence of sampling resistor easily; Once more, powerful resistive element volume is bigger, and quantity is more, and caloric value is also bigger.Therefore, need to adopt more advanced voltage signal sampling method to improve the measurement of voltage.
Summary of the invention
The utility model provides a kind of intelligent electrical apparatus release of built-in voltage transducer for solving the technical problem that exists in the known technology.
The technical scheme that the utility model is taked for the technical problem that exists in the solution known technology is: it comprises voltage collection circuit, and described voltage collection circuit includes current mode voltage sensor, general-purpose operation amplifier; The primary coil of described current mode voltage sensor is received the input terminal of surveying voltage after being connected in series a resistance, the secondary end of current mode voltage transformer connects two inputs of described general-purpose operation amplifier respectively, the plus earth of general-purpose operation amplifier, negative pole and output at the general-purpose operation amplifier are connected to a parallel circuits that is made of resistance and electric capacity, output termination voltage signal output end of general-purpose operation amplifier.
Advantage and the good effect that the utlity model has are:
The first, measuring circuit is isolated with major loop.Can avoid the destruction of the high voltage of danger to electronic circuit like this, the withstand voltage AC2000V that reaches of transducer can effectively protect electronic circuit not destroyed when main circuit voltage is unusual.
The second, improve sampling precision.Because the practical precision amperometric sensor, whole sampling process has had high-precision assurance, and adopts operational amplifier that source sampling is arranged, and has avoided the linearity distortion of signal, the sampled result phase shift less than 5 ', nonlinearity is less than 0.1%.
The 3rd, adopt this principle only to need a high-power resistance, all the other are low power electronic component, and therefore the power of sampling consumption is very limited, and caloric value also reduces, and meets the environmental requirement of green electrical equipment.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify the voltage collection circuit embodiment of the intelligent electrical apparatus release of following built-in voltage transducer now, and conjunction with figs. is described in detail as follows:
See also Fig. 1, the primary coil of current mode voltage sensor T is received the input terminal 1 and 2 of surveying voltage after being connected in series a resistance R i, the secondary end of current mode voltage transformer T is connected two inputs of positive pole, negative pole with operational amplifier LM224 respectively, the plus earth of general-purpose operation amplifier LM224, negative pole and lead-out terminal 3 at general-purpose operation amplifier LM224 are connected to a parallel circuits that is made of resistance R _ f and capacitor C, output termination voltage signal output end 3 of general-purpose operation amplifier LM224.
Claims (1)
1. the intelligent electrical apparatus release of a built-in voltage transducer, it comprises voltage collection circuit, it is characterized in that: described voltage collection circuit includes current mode voltage sensor, general-purpose operation amplifier; The primary coil of described current mode voltage sensor is received the input terminal of surveying voltage after being connected in series a resistance, the secondary end of current mode voltage transformer connects two inputs of described general-purpose operation amplifier respectively, the plus earth of general-purpose operation amplifier, negative pole and output at the general-purpose operation amplifier are connected to a parallel circuits that is made of resistance and electric capacity, output termination voltage signal output end of general-purpose operation amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620151531 CN200979866Y (en) | 2006-12-06 | 2006-12-06 | An intelligent release of a build-in voltage sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620151531 CN200979866Y (en) | 2006-12-06 | 2006-12-06 | An intelligent release of a build-in voltage sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200979866Y true CN200979866Y (en) | 2007-11-21 |
Family
ID=38980248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620151531 Expired - Lifetime CN200979866Y (en) | 2006-12-06 | 2006-12-06 | An intelligent release of a build-in voltage sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200979866Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680766A (en) * | 2012-05-07 | 2012-09-19 | 无锡智卓电气有限公司 | Three-phase voltage sampling circuit for control and protection switches |
| CN102759650A (en) * | 2012-07-27 | 2012-10-31 | 成都生辉电子科技有限公司 | Electric power intelligent detector |
| CN102759651A (en) * | 2012-07-27 | 2012-10-31 | 成都生辉电子科技有限公司 | Industrial voltage measurement structure |
| CN111864552A (en) * | 2020-07-03 | 2020-10-30 | 广东电网有限责任公司韶关供电局 | Intelligent control device and system for ring main unit ground knife padlock and ground knife padlock device |
-
2006
- 2006-12-06 CN CN 200620151531 patent/CN200979866Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680766A (en) * | 2012-05-07 | 2012-09-19 | 无锡智卓电气有限公司 | Three-phase voltage sampling circuit for control and protection switches |
| CN102759650A (en) * | 2012-07-27 | 2012-10-31 | 成都生辉电子科技有限公司 | Electric power intelligent detector |
| CN102759651A (en) * | 2012-07-27 | 2012-10-31 | 成都生辉电子科技有限公司 | Industrial voltage measurement structure |
| CN111864552A (en) * | 2020-07-03 | 2020-10-30 | 广东电网有限责任公司韶关供电局 | Intelligent control device and system for ring main unit ground knife padlock and ground knife padlock device |
| CN111864552B (en) * | 2020-07-03 | 2022-07-08 | 广东电网有限责任公司韶关供电局 | Intelligent control device and system for ring main unit ground knife padlock and ground knife padlock device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20071121 |
|
| EXPY | Termination of patent right or utility model |