CN204065374U - Novel inverter detection filter unit - Google Patents
Novel inverter detection filter unit Download PDFInfo
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- CN204065374U CN204065374U CN201420337564.XU CN201420337564U CN204065374U CN 204065374 U CN204065374 U CN 204065374U CN 201420337564 U CN201420337564 U CN 201420337564U CN 204065374 U CN204065374 U CN 204065374U
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Abstract
The utility model relates to solar inverter technical field, particularly a kind of novel inverter detection filter unit, comprise voltage detection unit, described voltage detection unit is connected with filter unit input end, described filter unit output terminal is connected with amplifying unit input end, described amplifying unit output terminal is connected with A/D converter input end, and described A/D converter output terminal is connected with single-chip microcomputer.After adopting said structure, the voltage impurity signal that novel inverter detection filter unit of the present utility model is detected by filter unit filtering, then send into single-chip microcomputer by amplifying unit and A/D converter and zero passage voltage compares, thus judge the voltage whether zero crossing of inverter.
Description
Technical field
The utility model relates to solar inverter technical field, particularly a kind of novel inverter detection filter unit.
Background technology
The grid-connected photovoltaic system of perfect performance, needs various safeguard measure to ensure the personal safety of user, prevents equipment from causing damage because of accident simultaneously.Due to photovoltaic generating system and electrical network parallel running, therefore photovoltaic generating system needs to detect electric network fault in time and the connection cutting off itself and electrical network.If can not Timeliness coverage electric network fault, just there will be photovoltaic generating system still to the situation that partial electric grid is powered, thus make local load still be in power supply state, cause device damage and casualties.So, need to detect contravarianter voltage, detect the zero crossing of contravarianter voltage.
Summary of the invention
The utility model technical issues that need to address are to provide a kind of current/voltage and detect accurately and the inverter detection filter unit of good wave filtering effect.
For solving above-mentioned technical matters, novel inverter detection filter unit of the present utility model comprises voltage detection unit, described voltage detection unit is connected with filter unit input end, described filter unit output terminal is connected with amplifying unit input end, described amplifying unit output terminal is connected with A/D converter input end, and described A/D converter output terminal is connected with single-chip microcomputer.
Further, described filter unit is electromagnetic interface filter.
Further, described electromagnetic interface filter comprises electrochemical capacitor C1, described electrochemical capacitor C1 is connected in parallel on current/voltage detecting unit output terminal, described electrochemical capacitor C1 two ends are parallel with electric capacity C2, described electric capacity C2 two ends are parallel with the series circuit of inductance L 1, electric capacity C3 and inductance L 2, described inductance L 1 is filter unit cathode output end with the tie point of electric capacity C3, and the tie point of described electric capacity C3 and inductance L 2 is filter unit cathode output end.
Further, described amplifying unit comprises amplification chip U1, and 2, No. 3 pins of described chip U1 are connected with filter unit negative, positive pole output terminal respectively by resistance R1, R2; The series circuit of resistance R3 and slide rheostat RP1 is connected with, described slide rheostat RP1 two ends parallel resistance R4 between 1, No. 8 pin of described chip U1; No. 6 pins of described chip U1 are connected with A/D converter input end by resistance R5.
Further, described voltage detection unit is Hall voltage sensor.
After adopting said structure, the voltage impurity signal that novel inverter detection filter unit of the present utility model is detected by filter unit filtering, then send into single-chip microcomputer by amplifying unit and A/D converter and zero passage voltage compares, thus judge the voltage whether zero crossing of inverter.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the circuit theory diagrams of the utility model filter unit.
Fig. 3 is the circuit theory diagrams of the utility model amplifying unit.
In figure: 1 is voltage detection unit, 2 is filter unit, and 3 is amplifying unit, and 4 is A/D converter, and 5 is single-chip microcomputer
Embodiment
As shown in Figure 1, novel inverter detection filter unit of the present utility model comprises voltage detection unit 1, described voltage detection unit 1 is Hall voltage sensor.Described voltage detection unit 1 is connected with filter unit 2 input end, described filter unit 2 output terminal is connected with amplifying unit 3 input end, described amplifying unit 3 output terminal is connected with A/D converter 4 input end, and described A/D converter 4 output terminal is connected with single-chip microcomputer 5.
Further, described filter unit is electromagnetic interface filter.As shown in Figure 2, described electromagnetic interface filter comprises electrochemical capacitor C1, described electrochemical capacitor C1 is connected in parallel on current/voltage detecting unit output terminal, described electrochemical capacitor C1 two ends are parallel with electric capacity C2, described electric capacity C2 two ends are parallel with the series circuit of inductance L 1, electric capacity C3 and inductance L 2, described inductance L 1 is filter unit cathode output end with the tie point of electric capacity C3, and the tie point of described electric capacity C3 and inductance L 2 is filter unit cathode output end.
Further, as shown in Figure 3, described amplifying unit comprises amplification chip U1, and described chip U1 adopts AD620AR-REEL.No. 7 pins of described chip meet+VSS, and 2, No. 3 pins that No. 4 pins of described chip meet chip U1 described in-VSS. are connected with filter unit negative, positive pole output terminal respectively by resistance R1, R2; The series circuit of resistance R3 and slide rheostat RP1 is connected with, described slide rheostat RP1 two ends parallel resistance R4 between 1, No. 8 pin of described chip U1; No. 6 pins of described chip U1 are connected with A/D converter input end by resistance R5.
Although the foregoing describe embodiment of the present utility model; but those skilled in the art are to be understood that; these only illustrate; various changes or modifications can be made to present embodiment; and not deviating from principle of the present utility model and essence, protection domain of the present utility model is only defined by the appended claims.
Claims (5)
1. a novel inverter detection filter unit, it is characterized in that: comprise voltage detection unit, described voltage detection unit is connected with filter unit input end, described filter unit output terminal is connected with amplifying unit input end, described amplifying unit output terminal is connected with A/D converter input end, and described A/D converter output terminal is connected with single-chip microcomputer.
2. according to novel inverter detection filter unit according to claim 1, it is characterized in that: described filter unit is electromagnetic interface filter.
3. according to novel inverter detection filter unit according to claim 2, it is characterized in that: described electromagnetic interface filter comprises electrochemical capacitor C1, described electrochemical capacitor C1 is connected in parallel on current/voltage detecting unit output terminal, described electrochemical capacitor C1 two ends are parallel with electric capacity C2, described electric capacity C2 two ends are parallel with the series circuit of inductance L 1, electric capacity C3 and inductance L 2, described inductance L 1 is filter unit cathode output end with the tie point of electric capacity C3, and the tie point of described electric capacity C3 and inductance L 2 is filter unit cathode output end.
4. according to novel inverter detection filter unit according to claim 3, it is characterized in that: described amplifying unit comprises amplification chip U1,2, No. 3 pins of described chip U1 are connected with filter unit negative, positive pole output terminal respectively by resistance R1, R2; The series circuit of resistance R3 and slide rheostat RP1 is connected with, described slide rheostat RP1 two ends parallel resistance R4 between 1, No. 8 pin of described chip U1; No. 6 pins of described chip U1 are connected with A/D converter input end by resistance R5.
5. according to novel inverter detection filter unit according to claim 1, it is characterized in that: described voltage detection unit is Hall voltage sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420337564.XU CN204065374U (en) | 2014-06-24 | 2014-06-24 | Novel inverter detection filter unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420337564.XU CN204065374U (en) | 2014-06-24 | 2014-06-24 | Novel inverter detection filter unit |
Publications (1)
| Publication Number | Publication Date |
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| CN204065374U true CN204065374U (en) | 2014-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420337564.XU Active CN204065374U (en) | 2014-06-24 | 2014-06-24 | Novel inverter detection filter unit |
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| CN (1) | CN204065374U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105425082A (en) * | 2015-12-21 | 2016-03-23 | 珠海格力电器股份有限公司 | Facility, method and device for arc fault detection |
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2014
- 2014-06-24 CN CN201420337564.XU patent/CN204065374U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105425082A (en) * | 2015-12-21 | 2016-03-23 | 珠海格力电器股份有限公司 | Facility, method and device for arc fault detection |
| CN105425082B (en) * | 2015-12-21 | 2018-12-07 | 珠海格力电器股份有限公司 | Detect equipment, the method and apparatus of arc fault |
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Addressee: Dong Kehai Document name: Notification of Passing Examination on Formalities |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160628 Address after: 310000 Zhejiang District of Fuyang Province Silver Lake Street Song South Street No. 3, building first Patentee after: Hangzhou Ju Qi information Polytron Technologies Inc Address before: 310000 Zhejiang city of Fuyang Province Silver Lake Street Song South Street No. 3, building first Patentee before: Zhejiang Fu Zhonglian Power Tech Corp. Inc. |