CN202837357U - Electronic watt-hour meter capable of decreasing interference on diverter by alternating magnetic field - Google Patents
Electronic watt-hour meter capable of decreasing interference on diverter by alternating magnetic field Download PDFInfo
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- CN202837357U CN202837357U CN 201220506159 CN201220506159U CN202837357U CN 202837357 U CN202837357 U CN 202837357U CN 201220506159 CN201220506159 CN 201220506159 CN 201220506159 U CN201220506159 U CN 201220506159U CN 202837357 U CN202837357 U CN 202837357U
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Abstract
The utility model discloses an electronic watt-hour meter capable of decreasing interference on a diverter by an alternating magnetic field. The electronic watt-hour meter comprises the diverter, a relay and a circuit board of the electronic watt-hour meter. The diverter comprises a section of a sampling resistor disc made of high resistivity material, two ends of the sampling resistor disc are respectively provided with a first connection end and a second connection end, the first connection end and the second connection end are respectively provided with a signal line, and tail ends of the two signal lines are respectively connected on the circuit board of the electronic watt-hour meter. One of the first connection end and the second connection end is formed by upward protruding of the edge on the upper side of the diverter in an integrated mode, and the other of the first connection end and the second connection end is formed by downward protruding of the edge on the lower side of the diverter in an integrated mode. With the structure, return circuits different in current directions can be formed, under the effect of alternating magnetic field interference, directions of induced current generated on two sides are opposite,the induced current generated on the two sides can be cancelled out, and therefore accuracy of the electronic watt-hour meter can be guaranteed effectively.
Description
Technical field
The utility model relates to the electronic instrument technical field, particularly relates to a kind of electronic electric energy meter that can reduce to be subjected to as the shunt of current sample element the alternating magnetic field interference.
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.A kind of electronic electric energy meter of prior art is to adopt the contour stability material of copper-manganese to make the current sample element, 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. and disturb, at the side connection manganese copper diverter 100 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, wherein, the first link 1011 and the second link 1031 all are that the upper edge from manganese copper diverter 100 upwards protrudes out formation, namely the first link 1011 is that upper edge in the first fine copper sheet part 101 upwards protrudes out formation, namely the second link 1031 is that upper edge in the second fine copper sheet part 103 upwards protrudes out formation, 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, has the magnetic interference signal of directions at this side of relay 104, shown in the arrow among Fig. 4, like this, 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 shunt is disturbed by alternating magnetic field, improve by the structure to shunt, can reduce disturbed by alternating magnetic field as the shunt of current sample element, 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 shunt is disturbed by alternating magnetic field, 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, contain one section sampling resistor sheet that adopts high resistivity material to be made in the shunt, the two ends of sampling resistor sheet are respectively equipped with the first link and the second link, respectively connect a signal line with being connected on the link at the first link, the end of two signal line is connected respectively on the circuit board of electronic electric energy meter; One of them of described the first link, the second link upwards protruded out by the upper edge one of shunt and forms, and wherein another lower edge one by shunt of described the first link, the second link protrudes out downwards and forms.
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 the first link and 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.
Described two signal line are converted into respectively laterally and are weldingly connected and connect with corresponding the first link, the second link.
The two ends of described sampling resistor sheet are connected with the second conducting strip one with the first conducting strip respectively.
Of the present utility modelly a kind ofly can reduce the electronic electric energy meter that shunt is disturbed by alternating magnetic field, to be used for connecting signal wire to be located at respectively the upside of shunt and the downside of shunt with the first link and the second link of realizing current sample, owing to connect the first link and second link of signal wire, one at upside, one at downside, be that sampling resistor sheet leading foot is respectively after upper bottom, will stride across the sampling resistor sheet so that be connected in the signal wire of lower side, like this in magnetic field, the sampling resistor sheet will be divided into two zones by signal wire on projecting plane the plane of magnetic direction (namely perpendicular to), form the loop of two current opposite in direction, under the effect of alternating magnetic field, the inductive current direction that both sides generate is opposite, can cancel out each other.Reduce interference with this, namely can reduce shunt and disturbed by alternating magnetic field.
The beneficial effects of the utility model are, since adopted with shunt be used for connect signal wire with the first link of realizing current sample and the bottom and upper segment that the second link is located at respectively shunt, so that the sampling resistor sheet is in magnetic field, just have the loop of two current opposite in direction on the sampling resistor sheet, under the effect of alternating magnetic field, the inductive current direction that both sides generate is opposite, can cancel out each other, thereby realize reducing the purpose that shunt is disturbed by alternating magnetic field.
Be compared to prior art, can bring following beneficial effect:
1, can reduce the interference that shunt is disturbed magnetic field;
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 shunt that can reduce of the present utility model is subjected to the electronic electric energy meter of alternating magnetic field interference to be 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 side 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;
Fig. 9 is the synoptic diagram that the shunt of electronic electric energy meter of the present utility model is subjected to magnetic interference.
Embodiment
Embodiment to shown in Figure 9, of the present utility model a kind ofly can reduce the electronic electric energy meter that shunt is disturbed by alternating magnetic field referring to Fig. 5, comprises the circuit board (not shown) of shunt 1, relay 2 and electronic electric energy meter; Shunt 1 comprises the first conducting strip 11, sampling resistor sheet 12 and the second conducting strip 13, wherein, the sampling resistor sheet adopts high resistivity material to be made, present embodiment is for adopting copper-manganese, and certainly, high resistivity material can also be the material of other types, such as constantan etc., the first conducting strip 11 and the second conducting strip 13 adopt fine copper, certainly, also can be other conductive materials.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 connected on the exit of a side 21 of relay 2 by the first conducting strip 11, in fact, also to 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, the disturbing magnetic field that has definite magnetic direction in the installation place of shunt, the arrow indication among magnetic direction such as Fig. 8; Described sampling resistor sheet 12 is plane-shaped structure, and described the first conducting strip 11 and the second conducting strip 13 also are plane-shaped structure.The two ends of described sampling resistor sheet also are provided with the first link 111 and 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; Wherein, described the first link 111 is upwards protruded out by the lower edge one of shunt and forms, and described the second link 131 is protruded out downwards by the upper edge one of shunt and forms.Described the first link 111 is located at the position of the close sampling resistor sheet 12 of the first conducting strip 11, and described the second link 131 is located at the position of the close sampling resistor sheet 12 of the second conducting strip 13.Certainly, also can be another kind of scheme, that is, described the first link and the second link are located at respectively on the sampling resistor sheet.
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 sampling resistor sheet surround again.
Of the present utility modelly a kind ofly can reduce the electronic electric energy meter that shunt is disturbed by alternating magnetic field, to be used for connecting signal wire to be located at respectively the downside of shunt and the upside of shunt with the first link 111 and the second link 131 of realizing current sample, owing to connect the first link 111 and second link 131 of signal wire, one at downside, one at upside, be that sampling resistor sheet leading foot is respectively after upper bottom, will stride across the sampling resistor sheet so that be connected in the signal wire of lower side, like this in magnetic field, the sampling resistor sheet will be divided into two zones by signal wire on projecting plane the plane of magnetic direction (namely perpendicular to), form the loop of two current opposite in direction, such as the loop S1 among Fig. 9 and loop S2, under the effect of alternating magnetic field, the inductive current direction that both sides generate is opposite, can cancel out each other.Reduce interference with this, namely can reduce shunt and disturbed by alternating magnetic field.
Above-described embodiment only is used for further specifying and of the present utility modelly a kind ofly can reduces the electronic electric energy meter that shunt is disturbed by alternating magnetic field; 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 (6)
1. one kind can reduce the electronic electric energy meter that shunt is disturbed by alternating magnetic field, 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, contain one section sampling resistor sheet that adopts high resistivity material to be made in the shunt, the two ends of sampling resistor sheet are respectively equipped with the first link and the second link, respectively connect a signal line with being connected on the link at the first link, the end of two signal line is connected respectively on the circuit board of electronic electric energy meter; It is characterized in that: one of them of described the first link, the second link upwards protruded out by the upper edge one of shunt and forms, and wherein another lower edge one by shunt of described the first link, the second link protrudes out downwards and forms.
2. according to claim 1ly can reduce the electronic electric energy meter that shunt is disturbed by alternating magnetic field, 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 2ly can reduce the electronic electric energy meter that shunt is disturbed by alternating magnetic field, it is characterized in that: described the first link and the second link are located at respectively on the sampling resistor sheet.
4. according to claim 2ly can reduce the electronic electric energy meter that shunt is disturbed by alternating magnetic field, 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.
5. it is characterized in that according to claim 1 and 2 or 3 or 4 describedly can reduce the electronic electric energy meter that shunt is disturbed by alternating magnetic field: described two signal line are converted into respectively laterally and are weldingly connected and connect with corresponding the first link, the second link.
6. according to claim 2ly can reduce the electronic electric energy meter that shunt is disturbed by alternating magnetic field, 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 201220506159 CN202837357U (en) | 2012-09-28 | 2012-09-28 | Electronic watt-hour meter capable of decreasing interference on diverter by alternating magnetic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220506159 CN202837357U (en) | 2012-09-28 | 2012-09-28 | Electronic watt-hour meter capable of decreasing interference on diverter by alternating magnetic field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202837357U true CN202837357U (en) | 2013-03-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220506159 Ceased CN202837357U (en) | 2012-09-28 | 2012-09-28 | Electronic watt-hour meter capable of decreasing interference on diverter by alternating magnetic field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202837357U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630716A (en) * | 2013-11-26 | 2014-03-12 | 厦门宏发电力电器有限公司 | Antijamming shunt and electronic electric meter thereof |
| 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 201220506159 patent/CN202837357U/en not_active Ceased
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630716A (en) * | 2013-11-26 | 2014-03-12 | 厦门宏发电力电器有限公司 | Antijamming shunt and electronic electric meter thereof |
| CN103630716B (en) * | 2013-11-26 | 2016-04-06 | 厦门宏发电力电器有限公司 | A kind of anti-interference shunt and electronic electric energy meter thereof |
| 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 |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C35 | Partial or whole invalidation of patent or utility model | ||
| IW01 | Full invalidation of patent right |
Decision date of declaring invalidation: 20131226 Decision number of declaring invalidation: 21851 Granted publication date: 20130327 |