CN204422634U - A kind of DC/AC leakage current sensor with self-checking function - Google Patents
A kind of DC/AC leakage current sensor with self-checking function Download PDFInfo
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- CN204422634U CN204422634U CN201520117285.7U CN201520117285U CN204422634U CN 204422634 U CN204422634 U CN 204422634U CN 201520117285 U CN201520117285 U CN 201520117285U CN 204422634 U CN204422634 U CN 204422634U
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- 238000004804 winding Methods 0.000 claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 7
- 238000007689 inspection Methods 0.000 claims abstract description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 230000001939 inductive effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000009514 concussion Effects 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
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Abstract
With a DC/AC leakage current sensor for self-checking function, comprise the band shell of upper and lower covers and the circuit board of enclosure and magnetic core winding, described magnetic core winding comprises 2 windings, and one group is open loop fluxgate coil, and one group is that test coil is for self-inspection.The magnetic core winding be made up of 2 windings is fixed on circuit board 2002, this circuit board is provided with lead-out terminal 2006 and CHK test lead 2005.This circuit board is placed on together with magnetic core in the shell that is made up of shell lower cover 2004 and outer casing upper cover 2001, is fixed as one by buckle.Cover under shell and be provided with 2 location stitch 2007, can be fixed on pcb board together with the pin on circuit board.
Description
Technical field
The utility model relates to a kind of current sensor, the leakage current sensor especially with self-checking function.
Background technology
At present, the new forms of energy industry development based on sun power is rapid, and each state is all wideling popularize.The inverter applications of novel transless topological structure is extensive, but also bring many problems to need to solve simultaneously, first be transless structure bring technique to simplify facility outside, shortcoming is also comparatively outstanding, such as flip-flop has the path injecting electrical network, and the generation of leakage current there has also been the risk injecting electrical network.
As everyone knows, the measurement for electric current has a variety of mode, but can measure interchange can measure again the isolation sensor selectivity of direct current also seldom, usually based on hall principle.But for the measurement of small area analysis, hall principle just becomes very inapplicable.First hall principle susceptibility is inadequate, and secondly temperature characterisitic is very poor, and the open air application for photovoltaic solar industry is very improper.
Current, the technology of the most frequently used measurement alternating current-direct current electric leakage is closed loop Fluxgate Technique, but this technology is comparatively complicated from technique realization, and cost is higher.Therefore photovoltaic industry is in the urgent need to a kind of sensor that can meet the electric leakage of photovoltaic alternating current-direct current of low cost, the reliability meeting photovoltaic industry is high, good temp characteristic, can measure faint alternating current-direct current small area analysis signal and with the requirement of self-checking function to require this sensor to have, thus substitutes expensive RCD equipment.
Summary of the invention
The purpose of this utility model is to provide a kind of low cost, concise in technology, be suitable for producing in batches, alternating current-direct current electric leakage can be measured, and with the product sensor of self-checking function simultaneously.
To achieve these goals, the utility model adopts following technical scheme: a kind of DC/AC leakage current sensor with self-checking function, comprise the band shell of upper and lower covers and the circuit board of enclosure and magnetic core winding, described magnetic core winding comprises 2 windings, one group is open loop fluxgate inductive coil, and one group is that test coil is for self-inspection.
Preferably, described the utility model adopts open loop Fluxgate Technique.
Preferably, described the utility model carries measuring ability.
Preferably, described magnetic core winding comprises two windings.
Preferably, described circuit board is with output contact pin pin.
Owing to have employed technique scheme, the utility model has following beneficial effect: the utility model, a kind of DC/AC leakage current sensor with self-checking function, DC/AC leakage current can be measured simultaneously, reaction time is enough fast, the rigors of photovoltaic industry for the leakage current sensor reaction time can be met, can Millisecond be reached.Because carrying test function; more add the reliability of product; the duty of self product can be checked on the one hand, testing button function can be provided for photovoltaic products on the one hand, have good booster action for protection personal safety and equipment security against fire.Due to the concise in technology that the utility model adopts, be applicable to industrialized mass production, there is the feature of low cost simultaneously, overcome the shortcoming that current high cost is measured.
Accompanying drawing explanation
With reference to the following description of accompanying drawing and this preferred implementation, the utility model and object thereof and advantage will be understood best, wherein:
Fig. 1 is the schematic diagram that the utility model uses;
Fig. 2 is structural drawing of the present utility model;
Fig. 3 is outside drawing of the present utility model.
Embodiment
With reference to Fig. 1, show principle of the present utility model in the drawings: winding 1002 is wrapped on the saturable magnetic core 1001 of high magnetic permeability, produced the concussion waveform of stable balance together with winding 1002 by concussion circuit for generating 1005, electric current passes from magnetic core 1001 is bored a hole from wire or copper bar, the direct current produced or alternating magnetic field, the existence in this magnetic field destroys the balance of waveform, circuit 1006 obtains the voltage signal proportional with primary current Ip after processing after filtering, this signal, after amplifying circuit 1007 adjusts, finally holds 1008 to export by M.Self-checking circuit is made up of the detection winding 1003 be wrapped on magnetic core 1001 and a current feedback circuit.A high level signal is connected to CHK measuring junction 1004; a stable measuring current can be obtained; this electric current detects after winding 1003 through multiturn, and the magnetic flux that magnetic core produces finally can hold generation voltage signal at M, and this voltage signal can be used for performing the function such as dropout, protection.
With reference to Fig. 2, there is shown concrete implementation step of the present utility model: the magnetic core winding be made up of 2 windings is fixed on circuit board 2002, this circuit board is provided with lead-out terminal 2006 and CHK test lead 2005.This circuit board is placed on together with magnetic core in the shell that is made up of shell lower cover 2004 and outer casing upper cover 2001, is fixed as one by buckle.Cover under shell and be provided with 2 location stitch 2007, can be fixed on pcb board together with the pin on circuit board.
A kind of DC/AC leakage current sensor with self-checking function of the utility model provides that a kind of technique is simple, starting material are easy to get, lower cost can be used for the sensor solution that photovoltaic inverter leakage current measures, and add self-checking function, make it more appropriate to the application of photovoltaic DC-to-AC converter.
Obviously, above-described embodiment of the present utility model is only for the utility model example is clearly described, and is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, other multi-form change and variations can also be made on the basis of the above description.Here cannot give exhaustive to all embodiments.Every belong to the technical solution of the utility model the apparent change of amplifying out or variation be still in the row of protection domain of the present utility model.
Claims (5)
1. the DC/AC leakage current sensor with self-checking function, it is characterized in that, comprise the band shell of upper and lower covers and the circuit board of enclosure and magnetic core winding, described magnetic core winding comprises 2 windings, one group is open loop fluxgate inductive coil, and one group is that test coil is for self-inspection.
2. a kind of DC/AC leakage current sensor with self-checking function according to claim 1, it is characterized in that, described sensor has self-detection circuit, has self-checking function.
3. a kind of DC/AC leakage current sensor with self-checking function according to claim 1, is characterized in that, described shell has 20mm perforation.
4. a kind of DC/AC leakage current sensor with self-checking function according to claim 1, it is characterized in that, described magnetic core has 2 windings.
5. a kind of DC/AC leakage current sensor with self-checking function according to claim 1, it is characterized in that, described circuit board has contact pin type lead-out terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520117285.7U CN204422634U (en) | 2015-02-27 | 2015-02-27 | A kind of DC/AC leakage current sensor with self-checking function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520117285.7U CN204422634U (en) | 2015-02-27 | 2015-02-27 | A kind of DC/AC leakage current sensor with self-checking function |
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| CN204422634U true CN204422634U (en) | 2015-06-24 |
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| CN201520117285.7U Expired - Fee Related CN204422634U (en) | 2015-02-27 | 2015-02-27 | A kind of DC/AC leakage current sensor with self-checking function |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106019194A (en) * | 2016-06-29 | 2016-10-12 | 张家港友诚科技机电有限公司 | Test method for electric leakage detection circuit |
| CN106443305A (en) * | 2016-11-09 | 2017-02-22 | 广东盈科电子有限公司 | Electric leakage detection circuit of alternating current and detection method |
| CN106546801A (en) * | 2015-09-23 | 2017-03-29 | 比亚迪股份有限公司 | A kind of electricity leakage sensor, high-tension distribution box and electric motor car |
| CN107305241A (en) * | 2017-06-26 | 2017-10-31 | 美新微纳传感系统有限公司 | A kind of magnetic sensing device and its real-time self checking method |
| CN108426937A (en) * | 2018-03-29 | 2018-08-21 | 广东美的制冷设备有限公司 | Formaldehyde sensor module, self-diagnosing method and computer readable storage medium |
| WO2018165970A1 (en) * | 2017-03-17 | 2018-09-20 | 浙江巨磁智能技术有限公司 | Leakage current sensor, and apparatus for monitoring leakage current |
| CN109061360A (en) * | 2018-06-21 | 2018-12-21 | 浙江巨磁智能技术有限公司 | The safe self-checking system of earth leakage protective and its self checking method |
| CN112748321A (en) * | 2020-12-04 | 2021-05-04 | 深圳供电局有限公司 | Testing device for residual current protection device |
| CN114141000A (en) * | 2021-12-02 | 2022-03-04 | 蚌埠依爱消防电子有限责任公司 | Automatic test system of residual current type electrical fire monitoring detector |
| WO2022237319A1 (en) * | 2021-11-08 | 2022-11-17 | 深圳市德兰明海科技有限公司 | Leakage current detection circuit and method, and leakage current detector |
| US11808793B2 (en) | 2021-07-16 | 2023-11-07 | Delta Electronics (Shanghai) Co., Ltd. | Detection device, inverter and detection method |
-
2015
- 2015-02-27 CN CN201520117285.7U patent/CN204422634U/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546801A (en) * | 2015-09-23 | 2017-03-29 | 比亚迪股份有限公司 | A kind of electricity leakage sensor, high-tension distribution box and electric motor car |
| CN106546801B (en) * | 2015-09-23 | 2019-07-26 | 比亚迪股份有限公司 | A kind of electricity leakage sensor, high-tension distribution box and electric vehicle |
| CN106019194A (en) * | 2016-06-29 | 2016-10-12 | 张家港友诚科技机电有限公司 | Test method for electric leakage detection circuit |
| CN106443305A (en) * | 2016-11-09 | 2017-02-22 | 广东盈科电子有限公司 | Electric leakage detection circuit of alternating current and detection method |
| EP3418754A4 (en) * | 2017-03-17 | 2019-04-24 | Zhejiang Magtron Intelligent Technology Limited Cooperation | Leakage current sensor, and apparatus for monitoring leakage current |
| WO2018165970A1 (en) * | 2017-03-17 | 2018-09-20 | 浙江巨磁智能技术有限公司 | Leakage current sensor, and apparatus for monitoring leakage current |
| CN107305241A (en) * | 2017-06-26 | 2017-10-31 | 美新微纳传感系统有限公司 | A kind of magnetic sensing device and its real-time self checking method |
| CN108426937A (en) * | 2018-03-29 | 2018-08-21 | 广东美的制冷设备有限公司 | Formaldehyde sensor module, self-diagnosing method and computer readable storage medium |
| CN108426937B (en) * | 2018-03-29 | 2020-06-23 | 广东美的制冷设备有限公司 | Formaldehyde sensor module, self-diagnosis method and computer-readable storage medium |
| CN109061360A (en) * | 2018-06-21 | 2018-12-21 | 浙江巨磁智能技术有限公司 | The safe self-checking system of earth leakage protective and its self checking method |
| CN109061360B (en) * | 2018-06-21 | 2020-12-15 | 浙江巨磁智能技术有限公司 | Leakage protection safety self-checking system and self-checking method thereof |
| CN112748321A (en) * | 2020-12-04 | 2021-05-04 | 深圳供电局有限公司 | Testing device for residual current protection device |
| CN112748321B (en) * | 2020-12-04 | 2023-01-24 | 深圳供电局有限公司 | Testing device for residual current protection device |
| US11808793B2 (en) | 2021-07-16 | 2023-11-07 | Delta Electronics (Shanghai) Co., Ltd. | Detection device, inverter and detection method |
| WO2022237319A1 (en) * | 2021-11-08 | 2022-11-17 | 深圳市德兰明海科技有限公司 | Leakage current detection circuit and method, and leakage current detector |
| CN114141000A (en) * | 2021-12-02 | 2022-03-04 | 蚌埠依爱消防电子有限责任公司 | Automatic test system of residual current type electrical fire monitoring detector |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150624 |
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| CF01 | Termination of patent right due to non-payment of annual fee |