CN102012475A - Leakage current detection circuit of circuit - Google Patents
Leakage current detection circuit of circuit Download PDFInfo
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- CN102012475A CN102012475A CN 201010530774 CN201010530774A CN102012475A CN 102012475 A CN102012475 A CN 102012475A CN 201010530774 CN201010530774 CN 201010530774 CN 201010530774 A CN201010530774 A CN 201010530774A CN 102012475 A CN102012475 A CN 102012475A
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Abstract
The invention discloses a leakage current detection circuit of a circuit, which comprises a single-row pin seat J1, a third pin of the single-row pin seat J1 is connected with the first input end of a transformer T, the second input end of the transformer T is connected with a collector of a triode Q1 through a resistor R2, an emitter f the triode Q1 is grounded, a base of the triode Q1 is connected with a first pin of the single-row pin seat J1 through a resistor R1, the first output end of the transformer T is connected with an adjustable resistor R3, the adjustable resistor R3 is connected with the reverse-phase input end of a comparator OP1, the output end of the comparator OP1 is further connected with the in-phase input end of the other comparator OP2, and the output end of the comparator OP2 is connected to a second pin of the single-row pin seat J1 through a resistor R7. The circuit is simple in structure and convenient for use.
Description
Technical field
The present invention relates to a kind of application circuit, be specifically related to a kind of circuit leakage current testing circuit.
Background technology
Existing circuit leakage current testing circuit is varied of a great variety, but most complex structure, the function complexity, and only need under the application scenario of function singleness at some, adopt the leakage current testing circuit of complicated circuit construction to finish the phase-detection function of simple function often, cost can increase so on the one hand, in addition on the one hand, after circuit structure was in a single day complicated, its labile factor was behind so just reducing product percent of pass virtually also increasing.
Summary of the invention
For overcoming deficiency of the prior art, the object of the present invention is to provide a kind of leakage current testing circuit simple in structure.
In order to solve the problems of the technologies described above, realize above-mentioned purpose, the present invention has adopted following technical scheme:
A kind of circuit leakage current testing circuit, comprise a single needle stand J1, the 5th pin of described single needle stand J1 connects power supply, the 4th pin ground connection of described single needle stand J1, the 3rd pin of described single needle stand J1 connects the first input end of a transformer T, second input end of described transformer T connects the collector of triode Q1 by a resistance R 2, the grounded emitter of described triode Q1, the base stage of described triode Q1 connects first pin of described single needle stand J1 by a resistance R 1, second output head grounding of described transformer T, the first output termination, the one adjustable resistance R3 of described transformer T, described adjustable resistance R3 connects the inverting input of a comparer OP1, the in-phase input end ground connection of described comparer OP1, cross-over connection one resistance R 4 between the output terminal of described comparer OP1 and the inverting input, the output terminal of described comparer OP1 also connects the in-phase input end of another comparer OP2, the inverting input of described comparer OP2 is connected on the electronegative potential resistance R 6, described electronegative potential resistance R 6 one end ground connection, the other end connects power supply by a noble potential resistance R 5, and described comparer OP2 output terminal is connected to second pin of described single needle stand J1 by a resistance R 7.
Further, cross-over connection has polar capacitor C1 between the in-phase input end of described comparer OP1 and the inverting input.
Further, cross-over connection has filter capacitor C2 between described comparer OP1 output terminal and the identical input end.
The course of work of phase detecting circuit of the present invention is as follows:
Change the size of leakage current by the adjusting of adjustable resistance R3.The output end signal of comparer OP1 passes through the inverting input that resistance R 4 feeds back to comparer OP1, by in-phase input end pin and the inverting input comparison of comparer OP1.The signal of the output terminal of comparer OP1 is given the in-phase input end of comparer OP2 through 2 filtering of filtering capacitor C simultaneously, comes by the in-phase input end of comparer OP2 and the signal of inverting input collection more whether electric leakage is arranged again.Whether described three row-needle receptacles, the first pin high-low level detects transformer T fault.
The present invention has the following advantages:
Circuit leakage current testing circuit of the present invention is simple in structure, easy to use.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, below with preferred embodiment of the present invention and conjunction with figs. describe in detail as after.The specific embodiment of the present invention is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
Fig. 1 is the circuit theory diagrams of circuit leakage current testing circuit of the present invention.
Embodiment
Below in conjunction with drawings and Examples technology implementation process of the present invention is described further.
Referring to shown in Figure 1, a kind of circuit leakage current testing circuit, comprise a single needle stand J1, the 5th pin 5 of described single needle stand J1 connects power supply, the 4th pin 4 ground connection of described single needle stand J1, the 3rd pin 3 of described single needle stand J1 connects the first input end of a transformer T, second input end of described transformer T connects the collector of triode Q1 by a resistance R 2, the grounded emitter of described triode Q1, the base stage of described triode Q1 connects first pin 1 of described single needle stand J1 by a resistance R 1, second output head grounding of described transformer T, the first output termination, the one adjustable resistance R3 of described transformer T, described adjustable resistance R3 connects the inverting input of a comparer OP1, the in-phase input end ground connection of described comparer OP1, cross-over connection one resistance R 4 between the output terminal of described comparer OP1 and the inverting input, the output terminal of described comparer OP1 also connects the in-phase input end of another comparer OP2, the inverting input of described comparer OP2 is connected on the electronegative potential resistance R 6, described electronegative potential resistance R 6 one end ground connection, the other end connects power supply by a noble potential resistance R 5, and described comparer OP2 output terminal is connected to second pin 2 of described single needle stand J1 by a resistance R 7.
Further, cross-over connection has polar capacitor C1 between the in-phase input end of described comparer OP1 and the inverting input.
Further, cross-over connection has filter capacitor C2 between described comparer OP1 output terminal and the identical input end.
The foregoing description just is to allow the one of ordinary skilled in the art can understand content of the present invention and enforcement according to this for technical conceive of the present invention and characteristics being described, its objective is, can not limit protection scope of the present invention with this.The variation or the modification of every equivalence that the essence of content has been done according to the present invention all should be encompassed in protection scope of the present invention.
Claims (3)
1. circuit leakage current testing circuit, comprise a single needle stand J1, the 5th pin (5) of described single needle stand J1 connects power supply, the 4th pin (4) ground connection of described single needle stand J1, the 3rd pin (3) of described single needle stand J1 connects the first input end of a transformer T, second input end of described transformer T connects the collector of triode Q1 by a resistance R 2, the grounded emitter of described triode Q1, the base stage of described triode Q1 connects first pin (1) of described single needle stand J1 by a resistance R 1, it is characterized in that: second output head grounding of described transformer T, the first output termination, the one adjustable resistance R3 of described transformer T, described adjustable resistance R3 connects the inverting input of a comparer OP1, the in-phase input end ground connection of described comparer OP1, cross-over connection one resistance R 4 between the output terminal of described comparer OP1 and the inverting input, the output terminal of described comparer OP1 also connects the in-phase input end of another comparer OP2, the inverting input of described comparer OP2 is connected on the electronegative potential resistance R 6, described electronegative potential resistance R 6 one end ground connection, the other end connects power supply by a noble potential resistance R 5, and described comparer OP2 output terminal is connected to second pin (2) of described single needle stand J1 by a resistance R 7.
2. circuit leakage current testing circuit according to claim 1 is characterized in that: cross-over connection has polar capacitor C1 between the in-phase input end of described comparer OP1 and the inverting input.
3. circuit leakage current testing circuit according to claim 2 is characterized in that: cross-over connection has filter capacitor C2 between described comparer OP1 output terminal and the identical input end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010530774 CN102012475A (en) | 2010-11-03 | 2010-11-03 | Leakage current detection circuit of circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010530774 CN102012475A (en) | 2010-11-03 | 2010-11-03 | Leakage current detection circuit of circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102012475A true CN102012475A (en) | 2011-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010530774 Pending CN102012475A (en) | 2010-11-03 | 2010-11-03 | Leakage current detection circuit of circuit |
Country Status (1)
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| CN (1) | CN102012475A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323764A (en) * | 2013-06-28 | 2013-09-25 | 北京大学 | Silicon PIN semiconductor detector leak current detecting device and detecting method thereof |
| CN103743426A (en) * | 2013-12-30 | 2014-04-23 | 山东众海公共安全器材有限公司 | Intelligent testing device for fire detector |
| CN105529945A (en) * | 2014-10-15 | 2016-04-27 | Ls产电株式会社 | Single-phase photovoltaic inverter |
| US9941712B2 (en) | 2012-12-03 | 2018-04-10 | Toyota Jidosha Kabushiki Kaisha | Electrical storage system |
| US10096992B2 (en) | 2012-12-03 | 2018-10-09 | Toyota Jidosha Kabushiki Kaisha | Electrical storage system |
| US10158241B2 (en) | 2012-12-03 | 2018-12-18 | Toyota Jidosha Kabushiki Kaisha | Electricity storage system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5640095A (en) * | 1994-06-24 | 1997-06-17 | U.S. Philips Corp. | Circuit arrangement for leakage-resistance testing of a circuit point |
| CN101042418A (en) * | 2006-03-23 | 2007-09-26 | 株式会社京浜 | Leakage detection circuit and battery electronic control unit |
| CN201876512U (en) * | 2010-11-03 | 2011-06-22 | 苏州合欣美电子科技有限公司 | Circuit leakage current detecting circuit |
-
2010
- 2010-11-03 CN CN 201010530774 patent/CN102012475A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5640095A (en) * | 1994-06-24 | 1997-06-17 | U.S. Philips Corp. | Circuit arrangement for leakage-resistance testing of a circuit point |
| CN101042418A (en) * | 2006-03-23 | 2007-09-26 | 株式会社京浜 | Leakage detection circuit and battery electronic control unit |
| CN201876512U (en) * | 2010-11-03 | 2011-06-22 | 苏州合欣美电子科技有限公司 | Circuit leakage current detecting circuit |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9941712B2 (en) | 2012-12-03 | 2018-04-10 | Toyota Jidosha Kabushiki Kaisha | Electrical storage system |
| US10096992B2 (en) | 2012-12-03 | 2018-10-09 | Toyota Jidosha Kabushiki Kaisha | Electrical storage system |
| US10158241B2 (en) | 2012-12-03 | 2018-12-18 | Toyota Jidosha Kabushiki Kaisha | Electricity storage system |
| CN103323764A (en) * | 2013-06-28 | 2013-09-25 | 北京大学 | Silicon PIN semiconductor detector leak current detecting device and detecting method thereof |
| CN103323764B (en) * | 2013-06-28 | 2015-09-23 | 北京大学 | A kind of silicon PIN semiconductor detector Leakage Current Detector and detection method thereof |
| CN103743426A (en) * | 2013-12-30 | 2014-04-23 | 山东众海公共安全器材有限公司 | Intelligent testing device for fire detector |
| CN105529945A (en) * | 2014-10-15 | 2016-04-27 | Ls产电株式会社 | Single-phase photovoltaic inverter |
| US9866142B2 (en) | 2014-10-15 | 2018-01-09 | Lsis Co., Ltd. | Single-phase photovoltaic inverter |
| CN105529945B (en) * | 2014-10-15 | 2018-05-29 | Ls产电株式会社 | single-phase photovoltaic inverter |
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Application publication date: 20110413 |