CN202815087U - Electronic electric energy meter capable of reducing alternating electromagnetic interference - Google Patents
Electronic electric energy meter capable of reducing alternating electromagnetic interference Download PDFInfo
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- CN202815087U CN202815087U CN 201220506132 CN201220506132U CN202815087U CN 202815087 U CN202815087 U CN 202815087U CN 201220506132 CN201220506132 CN 201220506132 CN 201220506132 U CN201220506132 U CN 201220506132U CN 202815087 U CN202815087 U CN 202815087U
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- electric energy
- energy meter
- electronic electric
- sampling resistor
- conducting strip
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Abstract
The utility model discloses an electronic electric energy meter capable of reducing alternating electromagnetic interference. The electronic electric energy meter capable of reducing the alternating electromagnetic interference comprises a current divider, a relay and a circuit board of the electronic electric energy meter. The current divider is connected to a leading-out terminal of the relay. The current divider is of a sheet structure. The current diverter contains a sampling sheet resistor prepared from a high-resistivity material. Two ends of the sampling sheet resistor are respectively connected to the circuit board of the electronic electric energy meter through signal lines. The sampling sheet resistor is designed to be a bending structure, so that the projection area of the sampling sheet resistor in the direction perpendicular to the magnetic field direction of an interference magnetic field becomes smaller compared with the projection area of the original plane structure. With the structure, the electronic electric energy meter capable of reducing the alternating electromagnetic interference can eliminate the magnetic field interference to the maximum degree, and reduces the influence on current sampling signals caused by the magnetic field, thereby effectively guaranteeing the metering accuracy of the electronic electric energy meter.
Description
Technical field
The utility model relates to the electronic instrument technical field, particularly relates to a kind of high resistivity material that uses as the electronic electric energy meter that can reduce the alternating electromagnetism interference of current sample element.
Background technology
Electronic electric energy meter is a kind of electronic instrument equipment, it passes through customer power supply voltage and current real-time sampling, adopt special-purpose electric energy meter integrated circuit, sampled voltage and current signal processed and multiply each other converting the pulse output that is directly proportional with electric energy to, show by register or digital indicator again.The electronic electric energy meter of prior art, to adopt the contour stability material of copper-manganese to make the current sample element mostly, namely as sampling resistor, Fig. 1 is the organigram of the electronic electric energy meter of prior art, Fig. 2 is the structural representation of current sampling circuit of the electronic electric energy meter of prior art, Fig. 3 is the structural representation of manganese copper diverter of the electronic electric energy meter of prior art, Fig. 4 is the scheme of installation of manganese copper diverter of the electronic electric energy meter of prior art, referring to shown in Figure 1, manganese copper diverter 100 and relay 104 are installed in the housing 200 of electronic electric energy meter, because the cause of electronic electric energy meter stube cable, can produce magnetic direction alternating electromagnetism as shown by arrows in FIG. disturbs, this magnetic direction determines, is connected with manganese copper diverter 100 at a side of relay 104.Extremely shown in Figure 4 referring to Fig. 2, this manganese copper diverter 100 comprises the first fine copper sheet part 101, copper-manganese sheet part 102 and the second fine copper sheet part 103, wherein, the two ends of copper-manganese sheet part 102 are connected with the second fine copper sheet part 103 one with the first fine copper sheet part 101 respectively, and the first fine copper sheet part 101, copper-manganese sheet part 102 and the second fine copper sheet part 103 all are plane-shaped structures and are to be in the same plane, manganese copper diverter 100 is connected in an exit of relay 104 usually, the the first fine copper sheet part 101 that is manganese copper diverter 100 is connected on the exit of relay 104, be provided with the first link 1011 of close copper-manganese sheet part 102 in the first fine copper sheet part 101, be provided with the second link 1031 of close copper-manganese sheet part 102 in the second fine copper sheet part 103, on the first link 1011 and the second link 1031, respectively be welded with a signal line 105, the end of two signal line 105 is connected on the circuit board 106 of electronic electric energy meter, like this, the electric current of crossing copper-manganese sheet part 102 by acquisition stream just can be used for obtaining customer power supply electric current real-time sampling.The electronic electric energy meter of this structure, when external interference was arranged, the table meter may be mistakened as interference several pulses and count electric energy.Under the effect of alternating electromagnetic field, the closed-loop path that the circuit board 106 of manganese copper diverter 100, signal wire 105, electronic electric energy meter consists of can generate induction electromotive force, produces induction current, hinders the variation of circuital current.According to the law of electromagnetic induction as can be known:
φ=B*S, wherein φ is the magnetic flux that passes the closed-loop path, and t is the time, and B is magnetic induction density, and S is the area perpendicular to magnetic direction; And then the measuring accuracy of ammeter impacted, the measuring accuracy impact of particularly little current signal is very large.On the other hand, when deenergization, owing to be subjected to the effect in magnetic field, the self inductance current that the closed-loop path that the circuit board of manganese copper diverter, signal wire, electronic electric energy meter consists of produces can make electric energy meter current indication occur; Cause without electric energy meter under any loading condition and measure mistakenly power consumption.The electronic electric energy meter of this structure, manganese copper diverter 100 is connected to a side of relay 104 usually, be subject to the disturbing magnetic field impact of cable, this side at relay 104 has the magnetic interference signal, shown in the arrow among Fig. 4, usually, the copper-manganese sheet part 102 that is connected to relay 104 1 sides just is perpendicular to magnetic direction, then the whole face of copper-manganese sheet part 102 is all passed by lines of magnetic induction, and therefore, circuit can be subject to larger magnetic interference.
The utility model content
The purpose of this utility model is to overcome the deficiency of prior art, provide a kind of and can reduce the electronic electric energy meter that alternating electromagnetism disturbs, improve by the structure to shunt, can reduce alternating electromagnetism disturbs, reduce magnetic field to the impact of current sampling signal, thereby effectively guarantee the electronic electric energy meter measurement accuracy.
The technical scheme that its technical matters that solves the utility model adopts is: a kind ofly can reduce the electronic electric energy meter that alternating electromagnetism disturbs, comprise the circuit board of shunt, relay and electronic electric energy meter; Described shunt is connected to an exit of relay; Shunt is the sheet body structure, contains one section sampling resistor sheet that adopts high resistivity material to be made in the shunt, and the two ends of sampling resistor sheet are connected to respectively the circuit board of described electronic electric energy meter by signal wire; Described sampling resistor sheet is set as bending structure, so that the sampling resistor sheet is becoming less perpendicular to the projected area of the magnetic direction of disturbing magnetic field with respect to the projected area of original plane-shaped structure.
Described shunt also comprises the first conducting strip and the second conducting strip, and the sampling resistor sheet is connected between the first conducting strip and the second conducting strip, and described shunt is installed in the exit of a side of described relay by the first conducting strip.
Described sampling resistor sheet is the U-shaped structure that the mode of bending forms.
Described the first conducting strip and described the second conducting strip are respectively plane-shaped structure.
The two ends of described sampling resistor sheet also are respectively equipped with the first link and the second link, and the first link and the second link are connected on the circuit board of described electronic electric energy meter by signal wire respectively.
Described two signal line are converted into respectively laterally and are weldingly connected and connect with corresponding the first link, the second link.
Described the first link and described the second link are located at respectively on the sampling resistor sheet.
Described the first link is located at the position of the close sampling resistor sheet of the first conducting strip, and described the second link is located at the position of the close sampling resistor sheet of the second conducting strip.
The two ends of described sampling resistor sheet are connected with the second conducting strip one with the first conducting strip respectively.
A kind of electronic electric energy meter that can reduce the alternating electromagnetism interference of the present utility model, that the structure of shunt is improved, the sampling resistor sheet that employing high resistivity material in the shunt is made is set as bending structure, preferred mode is that the sampling resistor sheet is directly bended into U-shaped structure, because the sampling resistor sheet is to make sampling resistor, at identical current-carrying area, in the certain situation of resistance, after carrying out the bending structure processing of (comprise and directly bend into U-shaped structure), obviously, the sampling resistor sheet of bending structure is less in the projected area perpendicular to magnetic direction than the sampling resistor sheet of flat shape, the induction electromotive force that namely generates can be less, can reduce by the degree of magnetic interference.
The beneficial effects of the utility model are, owing to adopted the sampling resistor sheet with shunt to be set as bending structure, preferred mode is that the sampling resistor sheet is directly bended into U-shaped structure, so that the sampling resistor sheet is becoming less perpendicular to the projected area of the magnetic direction of disturbing magnetic field with respect to the projected area of original plane-shaped structure, according to law of electromagnetic induction formula, the induction electromotive force that the disturbing magnetic field that is produced by cable generates also can be less, thereby so that current sampling circuit also can be reduced by the degree of magnetic interference, thereby effectively guarantee the electronic electric energy meter measurement accuracy.
Be compared to prior art, can bring following beneficial effect:
1, can reduce interference;
2, easily processing, in batches industrialization;
3, low cost.
Below in conjunction with drawings and Examples the utility model is described in further detail; But a kind of electronic electric energy meter that can reduce the alternating electromagnetism interference of the present utility model is not limited to embodiment.
Description of drawings
Fig. 1 is the organigram of the electronic electric energy meter of prior art;
Fig. 2 is the structural representation of current sampling circuit of the electronic electric energy meter of prior art;
Fig. 3 is the structural representation of manganese copper diverter of the electronic electric energy meter of prior art;
Fig. 4 is the scheme of installation of manganese copper diverter of the electronic electric energy meter of prior art;
Fig. 5 is the structural representation of the shunt of electronic electric energy meter of the present utility model;
Fig. 6 is the vertical view of the shunt of electronic electric energy meter of the present utility model;
Fig. 7 is the structural representation that the shunt of electronic electric energy meter of the present utility model connects signal wire;
Fig. 8 is the scheme of installation of the shunt of electronic electric energy meter of the present utility model.
Embodiment
Embodiment, extremely shown in Figure 8 referring to Fig. 5, a kind of electronic electric energy meter that can reduce the alternating electromagnetism interference of the present utility model, the circuit board (not shown) that comprises shunt 1, relay 2 and electronic electric energy meter, shunt 1 is the sheet body structure, contains one section sampling resistor sheet 12 that adopts high resistivity material to be made in the shunt 1, the selected high resistivity material of present embodiment is copper-manganese, certainly, high resistivity material can also be the material of other types, such as constantan etc.; Shunt 1 also comprises the first conducting strip 11 and the second conducting strip 13, and in the present embodiment, the first conducting strip 11 and the second conducting strip 13 are pure copper material and are made, and can certainly be that other conductive material is made; The two ends of sampling resistor sheet 12 are connected with the second conducting strip 13 one with the first conducting strip 11 respectively, shunt 1 is installed in the exit of a side 21 of relay 2 by the first conducting strip 11, certainly, also be provided with the stiff end 14 that is connected with relay at shunt 1, this stiff end 14 is used for realizing being connected with drawing of relay 2, this stiff end 14 is connected with the first conducting strip 11 one, on shunt 1, also be provided with the stiff end 15 that is fixedly connected with ammeter, this stiff end 15 is connected with the second conducting strip 13 one, usually have a disturbing magnetic field in the installation place of shunt, the arrow indication among magnetic direction such as Fig. 8; Described sampling resistor sheet 12 is set as bending structure, so that sampling resistor sheet 12 is becoming less perpendicular to the projected area of the magnetic direction of disturbing magnetic field with respect to the projected area of original plane-shaped structure; The U-shaped structure (as shown in Figure 6) that the sampling resistor sheet 12 of present embodiment forms for the mode of bending can certainly be the bending structure of other shapes; Described the first conducting strip 11 and described the second conducting strip 13 are respectively plane-shaped structure, described the first conducting strip 11 and the second conducting strip 13 are also respectively perpendicular to the magnetic direction of described disturbing magnetic field, this structure is in order to make with easy for installation, certainly, the first conducting strip 11 and the second conducting strip 13 also can differ and be decided to be plane-shaped structure, or not necessarily perpendicular to the magnetic direction of described disturbing magnetic field.
Position at the close sampling resistor sheet 12 of the first conducting strip 11 is provided with the first link 111, position at the close sampling resistor sheet 12 of the second conducting strip 13 is provided with the second link 131, the first link 111 be connected the end that connects respectively a signal line 3, two signal line 3 on the link 131 and be connected respectively on the circuit board of electronic electric energy meter; Present embodiment is the position that the first link is located at the close sampling resistor sheet 12 of the first conducting strip, and the second link is located at the position of the close sampling resistor sheet 12 of the second conducting strip.Certainly, also can be another kind of scheme, the first link and the second link are located at the both ends of sampling resistor sheet 12.
Described two signal line 3 are converted into respectively laterally and are weldingly connected with corresponding the first link 111, the second link 131 and meet (such as Fig. 7, shown in Figure 8), namely two wires (signal wire) are converted into laterally (being horizontal direction) and the first link or the welding of the second link fixes, and can reduce the area that two signal line and resistor disc 12 surround.
A kind of electronic electric energy meter that can reduce the alternating electromagnetism interference of the present utility model, that the structure of shunt 1 is improved, the sampling resistor sheet 12 of shunt is set as bending structure, preferred mode is that sampling resistor sheet 12 is directly bended into U-shaped structure, because sampling resistor sheet 12 uses as current sampling resistor, at identical current-carrying area, in the certain situation of resistance, after carrying out the processing of (comprise and directly bend into U-shaped structure) of bending structure shape, obviously, the sampling resistor sheet 12 that is set as bending structure is less in the projected area perpendicular to magnetic direction than the sampling resistor sheet 12 of flat shape, the induction electromotive force that namely generates can be less, can reduce by the degree of magnetic interference.
Below be to adopt the shunt of prior art and adopt shunt of the present utility model under same magnetic field is disturbed, when actual load is unloaded, the faradic table of comparisons that records, obviously, the utility model can reduce interference.
Above-described embodiment only is used for further specifying a kind of electronic electric energy meter that can reduce the alternating electromagnetism interference of the present utility model; but the utility model is not limited to embodiment; every foundation technical spirit of the present utility model all falls in the protection domain of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment does.
Claims (9)
1. one kind can be reduced the electronic electric energy meter that alternating electromagnetism disturbs, and comprises the circuit board of shunt, relay and electronic electric energy meter; Described shunt is connected to an exit of relay; Shunt is the sheet body structure, contains one section sampling resistor sheet that adopts high resistivity material to be made in the shunt, and the two ends of sampling resistor sheet are connected to respectively the circuit board of described electronic electric energy meter by signal wire; It is characterized in that: described sampling resistor sheet is set as bending structure, so that the sampling resistor sheet is becoming less perpendicular to the projected area of the magnetic direction of disturbing magnetic field with respect to the projected area of original plane-shaped structure.
2. according to claim 1ly can reduce the electronic electric energy meter that alternating electromagnetism disturbs, it is characterized in that: described shunt also comprises the first conducting strip and the second conducting strip, the sampling resistor sheet is connected between the first conducting strip and the second conducting strip, and described shunt is installed in the exit of a side of described relay by the first conducting strip.
3. according to claim 1 and 2ly can reduce the electronic electric energy meter that alternating electromagnetism disturbs, it is characterized in that: described sampling resistor sheet is the U-shaped structure that the mode of bending forms.
4. according to claim 2ly can reduce the electronic electric energy meter that alternating electromagnetism disturbs, it is characterized in that: described the first conducting strip and described the second conducting strip are respectively plane-shaped structure.
5. according to claim 3ly can reduce the electronic electric energy meter that alternating electromagnetism disturbs, it is characterized in that: the two ends of described sampling resistor sheet also are respectively equipped with the first link and the second link, and the first link and the second link are connected on the circuit board of described electronic electric energy meter by signal wire respectively.
6. according to claim 5ly can reduce the electronic electric energy meter that alternating electromagnetism disturbs, it is characterized in that: described two signal line are converted into respectively laterally and are weldingly connected and connect with corresponding the first link, the second link.
7. according to claim 5ly can reduce the electronic electric energy meter that alternating electromagnetism disturbs, it is characterized in that: described the first link and described the second link are located at respectively on the sampling resistor sheet.
8. according to claim 5ly can reduce the electronic electric energy meter that alternating electromagnetism disturbs, it is characterized in that: described the first link is located at the position of the close sampling resistor sheet of the first conducting strip, and described the second link is located at the position of the close sampling resistor sheet of the second conducting strip.
9. according to claim 2ly can reduce the electronic electric energy meter that alternating electromagnetism disturbs, it is characterized in that: the two ends of described sampling resistor sheet are connected with the second conducting strip one with the first conducting strip respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220506132 CN202815087U (en) | 2012-09-28 | 2012-09-28 | Electronic electric energy meter capable of reducing alternating electromagnetic interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220506132 CN202815087U (en) | 2012-09-28 | 2012-09-28 | Electronic electric energy meter capable of reducing alternating electromagnetic interference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202815087U true CN202815087U (en) | 2013-03-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220506132 Expired - Lifetime CN202815087U (en) | 2012-09-28 | 2012-09-28 | Electronic electric energy meter capable of reducing alternating electromagnetic interference |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202815087U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104880587A (en) * | 2015-05-08 | 2015-09-02 | 厦门宏发电力电器有限公司 | Shunt with unequal thickness for adjusting temperature rise and temperature rise adjusting method thereof |
| CN111693769A (en) * | 2019-03-15 | 2020-09-22 | 宁波三星智能电气有限公司 | Electric energy meter |
| CN111830301A (en) * | 2019-04-23 | 2020-10-27 | 宁波三星智能电气有限公司 | Electric energy meter |
-
2012
- 2012-09-28 CN CN 201220506132 patent/CN202815087U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104880587A (en) * | 2015-05-08 | 2015-09-02 | 厦门宏发电力电器有限公司 | Shunt with unequal thickness for adjusting temperature rise and temperature rise adjusting method thereof |
| CN104880587B (en) * | 2015-05-08 | 2017-10-27 | 厦门宏发电力电器有限公司 | A kind of not uniform thickness splitter for being used to adjust temperature rise and its method for adjusting temperature rise |
| CN111693769A (en) * | 2019-03-15 | 2020-09-22 | 宁波三星智能电气有限公司 | Electric energy meter |
| CN111830301A (en) * | 2019-04-23 | 2020-10-27 | 宁波三星智能电气有限公司 | Electric energy meter |
| CN111830301B (en) * | 2019-04-23 | 2023-03-31 | 宁波三星智能电气有限公司 | Electric energy meter |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130320 |