CN202939197U - Shunt of electronic watt-hour meter capable of resisting alternating magnetic field interference - Google Patents
Shunt of electronic watt-hour meter capable of resisting alternating magnetic field interference Download PDFInfo
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- CN202939197U CN202939197U CN 201220702936 CN201220702936U CN202939197U CN 202939197 U CN202939197 U CN 202939197U CN 201220702936 CN201220702936 CN 201220702936 CN 201220702936 U CN201220702936 U CN 201220702936U CN 202939197 U CN202939197 U CN 202939197U
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- splitter
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- shunt
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Abstract
The utility model discloses a shunt of an electronic watt-hour meter capable of resisting an alternating magnetic field interference. The shunt comprises a sampling resistor sheet and signal lines. The sampling resistor sheet comprises a splitter made of a high-resistivity material. The splitter is provided with a through hole. A plastic button whose middle part is an aperture is nested in the through hole. Two ends of the splitter are provided with a first connection end and a second connection end respectively. The first connection end is formed by a body on an upper-side edge of the sampling resistor sheet through protruding outwardly. The second connection end is formed by the body on a lower-side edge of the sampling resistor sheet through protruding downwardly. A first signal line is connected with the first connection end and a second signal line is connected with the second connection end. The second signal line passes through the aperture of the plastic button and then is twisted with the first signal line which is on an upper side. And the second signal line and the first signal line are connected in parallel to a circuit board of the electronic watt-hour meter. By using the structure, the shunt can resist the alternating magnetic field interference from a certain or uncertain direction and a disadvantage generated because the signal lines directly pass through the through hole can be avoided.
Description
Technical field
The utility model relates to the electronic instrument technical field, particularly relates to a kind of shunt that can resist the electronic electric energy meter of 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 are processed and multiplied each other converting the pulse output that is directly proportional to electric energy to, then show by register or digital indicator.the electronic electric energy meter of prior art normally adopts the contour stability material of copper-manganese to make the current sample element, Fig. 1 is the structural representation of current sampling circuit of the electronic electric energy meter of prior art, Fig. 2 is the structural representation of sampling resistor sheet of the electronic electric energy meter of prior art, referring to Fig. 1, shown in Figure 2, shunt comprises sampling resistor sheet and signal wire, sampling resistor sheet 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 are all plane-shaped structures and are to be in same plane, sampling resistor sheet 100 is connected in an exit of relay (not shown) usually, the the first fine copper sheet part 101 that is sampling resistor sheet 100 is connected on the exit of relay, be provided with the first link 1011 near copper-manganese sheet part 102 on the first fine copper sheet part 101, be provided with the second link 1031 near copper-manganese sheet part 102 on the second fine copper sheet part 103, respectively be welded with a signal line 105 on the first link 1011 and the second link 1031, two signal line 105 are drawn rear strand and are in the same place from the first link 1011 and the second link 1031 respectively, 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 are all that the upper edge from sampling resistor sheet 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, the second link 1031 is that the 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 is 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 sampling resistor sheet 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 is impacted, the measuring accuracy impact of particularly little current signal is very large.On the other hand, when deenergization, due to the effect that is subjected to magnetic field, the self inductance current that the closed-loop path that the circuit board of sampling resistor sheet, 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 utility model content
The purpose of this utility model is to overcome the deficiency of prior art, a kind of shunt that can resist the electronic electric energy meter of alternating magnetic field interference is provided, 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 of shunt that can resist the electronic electric energy meter of alternating magnetic field interference comprises sampling resistor sheet and signal wire; Contain one section splitter that adopts high resistivity material to be made in this sampling resistor sheet, be provided with a through hole in splitter, be the plastic button of open-work in the middle of being equipped with in through hole; The two ends of splitter are respectively equipped with the first link and the second link, and wherein, described the first link is upwards protruded out by the upper edge one of sampling resistor sheet and forms, and described the second link is protruded out downwards by the lower edge one of sampling resistor sheet and forms; Signal wire is made of first signal line secondary signal line, the first signal line is connected with the first link, the secondary signal line is connected with the second link, the secondary signal line after passing the open-work of plastic button with the first signal line of upside strand and together with and be connected on the circuit board of electronic electric energy meter.
Described through hole is located at the centre of described splitter.
Described plastic button is made of the convex edge of right cylinder and right cylinder one end, the through hole of described splitter is circular hole, described open-work is along cylindrical axis direction setting, the right cylinder of plastic button is embedded in the through hole of splitter and is interference fit, and the convex edge of plastic button is pressed on the Kong Yanchu of the through hole of splitter.
Described secondary signal line is passed the open-work of plastic button by an end of the convex edge of plastic button, described open-work is circular port.
Described sampling resistor sheet also comprises the first conducting strip and the second conducting strip, and described splitter is connected between the first conducting strip and the second conducting strip.
Described the first link and the second link are located at respectively on described splitter.
Described the first link is located on the first conducting strip, and is in the position near described splitter; Described the second link is located on the second conducting strip, and is in the position near described splitter.
Described the first link is located on the second conducting strip, and is in the position near described splitter; Described the second link is located on the first conducting strip, and is in the position near described splitter.
Described first signal line is converted into laterally and fixes with the first link welding, and described secondary signal line is converted into laterally and fixes with the second link welding.
The two ends of described splitter are connected with the second conducting strip one with the first conducting strip respectively.
A kind of shunt that can resist the electronic electric energy meter of alternating magnetic field interference of the present utility model, to be used for connecting upside that signal wire is located at respectively the sampling resistor sheet with the first link of realizing current sample and the second link and the downside of sampling resistor sheet, establish a through hole in the splitter of sampling resistor sheet, and be nested with in through hole and be the plastic button of open-work in the middle of one, allow the secondary signal line on the second link that is connected to sampling resistor sheet downside pass open-work, namely be equivalent to pass the through hole of splitter.due to the first link and the second link that connect signal wire, one at upside, one at downside, be splitter leading foot respectively upper below after, and due to the secondary signal line that is connected in lower side pass the through hole of splitter and above splitter with the signal wire of upper side edge strand and together, on the one hand, can pass the through hole of splitter and splitter will be divided into two zones so that be connected in the signal wire utilization of lower side, like this in magnetic field, splitter 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 alternating magnetic field of the determining effect of (coming from the magnetic interference that cable produces), the inductive current direction that both sides generate is opposite, can cancel out each other.On the other hand, after can utilizing signal wire to pass the through hole of splitter, splitter and signal wire are on the projecting plane of the side direction of splitter, also form the loop of two current opposite in direction, under the effect of uncertain alternating magnetic field (direction also is not orthogonal to the sampling resistor sheet), the inductive current direction that both sides generate is opposite, can cancel out each other.Reduce interference with this, namely can resist the interference that shunt is subjected to definite or uncertain alternating magnetic field.
A kind of shunt that can resist the electronic electric energy meter of alternating magnetic field interference of the present utility model, establish a through hole in splitter, and be nested with in through hole and be the plastic button of open-work in the middle of one, be connected to open-work that secondary signal line on the second link of sampling resistor sheet downside passes plastic button and be after the through hole of splitter again with the first signal line strand of upside also together with and be connected on the circuit board of electronic electric energy meter.Shunt is in ammeter uses, and under for a long time large electric current and hot environment, shunt piece surface temperature is higher, if there is no plastic button, the secondary signal line can directly contact with the splitter that material is metal, will directly have influence on the serviceable life of signal wire.And the secondary signal line is when penetrating the hole, easily by the insulated hull of splitter scratch signal wire.Moreover, if there is no plastic button, be in the splitter through hole when foreign matter is filled to through wires hole, will affect the sample resistance value between secondary signal line and first signal line.
the beneficial effects of the utility model are, owing to having adopted shunt is used for connecting the bottom and upper segment that signal wire is located at respectively the sampling resistor sheet with the first link of realizing current sample and the second link, and be provided with a through hole in splitter, allow the secondary signal line that is connected in lower side pass the through hole of splitter and above splitter with the signal wire strand of upper side edge and together, like this, on the one hand, just make splitter in magnetic field, just have the loop of two current opposite in direction on splitter, under the alternating magnetic field of the determining effect of (coming from the magnetic interference that cable produces), the inductive current direction that both sides generate is opposite, can cancel out each other, on the other hand, splitter and signal wire also form the loop of two current opposite in direction on the projecting plane of the side direction of splitter, under the effect of uncertain alternating magnetic field (direction also is not orthogonal to the sampling resistor sheet), the inductive current direction that both sides generate is opposite, can cancel out each other, thereby realized the purpose that the opposing shunt is disturbed by definite or uncertain alternating magnetic field.Be the plastic button of open-work due to also be nested with one in the through hole of splitter in the middle of, the secondary signal line is when passing the through hole of splitter, that open-work by plastic button passes, the secondary signal line does not contact with splitter, has following beneficial effect: 1, threading process, avoid signal wire directly and Metal Contact, cause signal wire insulated hull breakage etc. bad; 2, after splitter continues the long-time galvanization of large electric current, in the through hole of splitter, temperature is higher, and after increasing plastic button, signal wire directly contacts rather than metal with plastic button, plays heat-blocking action; 3, being used for the first signal line of taking a sample and the resistance value between the secondary signal line depends on material resistance between the first link and the second link, the through wires hole that there is no plastic button, through wires hole is easily filled by foreign matter, when foreign matter is conductor, with the resistance value that changes between first signal line and secondary signal line, thereby affect the measuring accuracy of ammeter.
Below in conjunction with drawings and Examples, the utility model is described in further detail; But a kind of shunt of the electronic electric energy meter of alternating magnetic field interference that can resist of the present utility model is not limited to embodiment.
Description of drawings
Fig. 1 is the structural representation of current sampling circuit of the electronic electric energy meter of prior art;
Fig. 2 is the structural representation of manganese copper diverter of the electronic electric energy meter of prior art;
Fig. 3 is structural representation of the present utility model;
Fig. 4 is front view of the present utility model;
Fig. 5 is vertical view of the present utility model;
Fig. 6 is left view of the present utility model;
Fig. 7 is the D structure schematic diagram of plastic button of the present utility model;
Fig. 8 is the structure cut-open view of plastic button of the present utility model.
Embodiment
Embodiment, to shown in Figure 8, a kind of shunt that can resist the electronic electric energy meter of alternating magnetic field interference of the present utility model comprises sampling resistor sheet 100 and signal wire referring to Fig. 3; Contain one section splitter 12 that adopts high resistivity material to be made in this sampling resistor sheet 100, be provided with a through hole 121 in splitter 12, be the plastic button 2 of open-work 21 in the middle of being equipped with in through hole 121; The two ends of splitter 12 are respectively equipped with the first link 122 and the second link 123, wherein, described the first link 122 is upwards protruded out by the upper edge one of sampling resistor sheet 100 and forms, and described the second link 123 is protruded out downwards by the lower edge one of sampling resistor sheet 100 and forms; Signal wire is made of first signal line 31 secondary signal lines 32, first signal line 31 is connected with the first link 122, secondary signal line 32 is connected with the second link 123, secondary signal line 32 after the open-work 21 that passes plastic button with first signal line 31 strands of upside and together with and be connected on the circuit board (not shown) of electronic electric energy meter.
Described through hole 121 is located at the centre of described splitter 12.
Described plastic button 2 is made of the convex edge 23 of right cylinder 22 and right cylinder one end, the through hole 121 of described splitter is circular hole, described open-work 21 is along the axis direction setting of right cylinder 22, the right cylinder 22 of plastic button is embedded in the through hole 121 of splitter and for interference matches, the convex edge 23 of plastic button is pressed on the Kong Yanchu of the through hole 121 of splitter.
Described secondary signal line 32 is passed the open-work 21 of plastic button by an end of the convex edge of plastic button, described open-work 21 is circular port.
Described sampling resistor sheet 100 also comprises the first conducting strip 11 and the second conducting strip 13, and described splitter 12 is connected between the first conducting strip 11 and the second conducting strip 13.
In the present embodiment, described the first link 122 is located on the first conducting strip 11, and is in the position near described splitter 12; Described the second link 123 is located on the second conducting strip 13, and is in the position near described splitter 12.Certainly, can be also another kind of set-up mode, namely described the first link is located on the second conducting strip, and is in the position near described splitter; Described the second link is located on the first conducting strip, and is in the position near described splitter.Can also be that described the first link and the second link are located at respectively on described splitter.
Described first signal line 31 is converted into laterally and fixes with the first link 122 welding, and described secondary signal line 32 is converted into laterally and fixes with the second link 123 welding.
The two ends of described splitter 12 are connected with the second conducting strip 13 one with the first conducting strip 11 respectively.
A kind of shunt that can resist the electronic electric energy meter of alternating magnetic field interference of the present utility model, to be used for connecting signal wire to be located at respectively the upside of sampling resistor sheet 100 and the downside of sampling resistor sheet 100 with the first link 122 and the second link 123 of realizing current sample, establish a through hole 121 in the splitter 12 of sampling resistor sheet, and be nested with in through hole 121 and be the plastic button 2 of open-work 21 in the middle of one, allow secondary signal 32 lines on the second link that is connected to sampling resistor sheet downside pass open-work 21, namely be equivalent to pass the through hole 121 of splitter.due to the first link and the second link that connect signal wire, one at upside, one at downside, be splitter leading foot respectively upper below after, and due to the secondary signal line 32 that is connected in lower side pass the through hole 121 of splitter and above splitter with signal wire 31 strand of upper side edge and together, on the one hand, can utilize the through hole that passes splitter splitter will be divided into two zones so that be connected in the signal wire 32 of lower side, like this in magnetic field, splitter 12 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 alternating magnetic field of the determining effect of (coming from the magnetic interference that cable produces), the inductive current direction that both sides generate is opposite, can cancel out each other.On the other hand, after can utilizing signal wire 32 to pass the through hole 121 of splitter, splitter and signal wire are on the projecting plane of the side direction of splitter, also form the loop of two current opposite in direction, under the effect of uncertain alternating magnetic field (direction also is not orthogonal to the sampling resistor sheet), the inductive current direction that both sides generate is opposite, can cancel out each other.Reduce interference with this, namely can resist the interference that shunt is subjected to definite or uncertain alternating magnetic field.
A kind of shunt that can resist the electronic electric energy meter of alternating magnetic field interference of the present utility model, establish a through hole 121 in splitter 12, and be nested with in through hole and be the plastic button 2 of open-work in the middle of one, be connected to open-work 21 that secondary signal line 32 on the second link of sampling resistor sheet downside passes plastic button and be after the through hole 121 of splitter again with first signal line 31 strands of upside also together with and be connected on the circuit board of electronic electric energy meter.Shunt is in ammeter uses, and under for a long time large electric current and hot environment, shunt piece surface temperature is higher, if there is no plastic button, the secondary signal line can directly contact with the splitter that material is metal, will directly have influence on the serviceable life of signal wire.And the secondary signal line is when penetrating the hole, easily by the insulated hull of splitter scratch signal wire.Moreover, if there is no plastic button, be in the splitter through hole when foreign matter is filled to through wires hole, will affect the sample resistance value between secondary signal line and first signal line.
Above-described embodiment only is used for further illustrating a kind of shunt that can resist the electronic electric energy meter of alternating magnetic field 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 (10)
1. the shunt that can resist the electronic electric energy meter of alternating magnetic field interference, comprise sampling resistor sheet and signal wire; Contain one section splitter that adopts high resistivity material to be made in this sampling resistor sheet, it is characterized in that: be provided with a through hole in splitter, be the plastic button of open-work in the middle of being equipped with in through hole; The two ends of splitter are respectively equipped with the first link and the second link, and wherein, described the first link is upwards protruded out by the upper edge one of sampling resistor sheet and forms, and described the second link is protruded out downwards by the lower edge one of sampling resistor sheet and forms; Signal wire is made of first signal line secondary signal line, the first signal line is connected with the first link, the secondary signal line is connected with the second link, the secondary signal line after passing the open-work of plastic button with the first signal line of upside strand and together with and be connected on the circuit board of electronic electric energy meter.
2. the shunt that can resist the electronic electric energy meter that alternating magnetic field disturbs according to claim 1, it is characterized in that: described through hole is located at the centre of described splitter.
3. the shunt that can resist the electronic electric energy meter that alternating magnetic field disturbs according to claim 1 and 2, it is characterized in that: described plastic button is made of the convex edge of right cylinder and right cylinder one end, the through hole of described splitter is circular hole, described open-work is along cylindrical axis direction setting, the right cylinder of plastic button is embedded in the through hole of splitter and is interference fit, and the convex edge of plastic button is pressed on the Kong Yanchu of the through hole of splitter.
4. the shunt that can resist the electronic electric energy meter that alternating magnetic field disturbs according to claim 3, it is characterized in that: described secondary signal line is passed the open-work of plastic button by an end of the convex edge of plastic button, described open-work is circular port.
5. the shunt that can resist the electronic electric energy meter that alternating magnetic field disturbs according to claim 1, it is characterized in that: described sampling resistor sheet also comprises the first conducting strip and the second conducting strip, and described splitter is connected between the first conducting strip and the second conducting strip.
6. the shunt that can resist the electronic electric energy meter that alternating magnetic field disturbs according to claim 1, it is characterized in that: described the first link and the second link are located at respectively on described splitter.
7. the shunt that can resist the electronic electric energy meter that alternating magnetic field disturbs according to claim 1, it is characterized in that: described the first link is located on the first conducting strip, and is in the position near described splitter; Described the second link is located on the second conducting strip, and is in the position near described splitter.
8. the shunt that can resist the electronic electric energy meter that alternating magnetic field disturbs according to claim 1, it is characterized in that: described the first link is located on the second conducting strip, and is in the position near described splitter; Described the second link is located on the first conducting strip, and is in the position near described splitter.
9. the shunt that can resist the electronic electric energy meter that alternating magnetic field disturbs according to claim 1, it is characterized in that: described first signal line is converted into laterally and fixes with the first link welding, and described secondary signal line is converted into laterally and fixes with the second link welding.
10. the shunt that can resist the electronic electric energy meter that alternating magnetic field disturbs according to claim 1, it is characterized in that: the two ends of described splitter 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 201220702936 CN202939197U (en) | 2012-12-14 | 2012-12-14 | Shunt of electronic watt-hour meter capable of resisting alternating magnetic field interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220702936 CN202939197U (en) | 2012-12-14 | 2012-12-14 | Shunt of electronic watt-hour meter capable of resisting alternating magnetic field interference |
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| Publication Number | Publication Date |
|---|---|
| CN202939197U true CN202939197U (en) | 2013-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220702936 Expired - Lifetime CN202939197U (en) | 2012-12-14 | 2012-12-14 | Shunt of electronic watt-hour meter capable of resisting alternating magnetic field interference |
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| CN (1) | CN202939197U (en) |
Cited By (5)
| 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 |
| CN103926458A (en) * | 2014-04-30 | 2014-07-16 | 厦门宏发电力电器有限公司 | Electronic energy meter, diverter of electronic energy meter, sampling resistor disc and method for offsetting alternating magnetic field interference of circuit board |
| CN107345977A (en) * | 2017-07-03 | 2017-11-14 | 杭州海兴电力科技股份有限公司 | The Wiring structure of the pin configuration of manganese copper diverter, pcb board and pcb board |
| CN110836986A (en) * | 2019-11-25 | 2020-02-25 | 新沂市鑫洋电子有限公司 | Manganese-copper current divider for electronic electric energy meter and application thereof |
| CN110836987A (en) * | 2019-11-25 | 2020-02-25 | 新沂市鑫洋电子有限公司 | Manganese-copper shunt of three-phase intelligent electric energy meter and application thereof |
-
2012
- 2012-12-14 CN CN 201220702936 patent/CN202939197U/en not_active Expired - Lifetime
Cited By (9)
| 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 |
| CN103926458A (en) * | 2014-04-30 | 2014-07-16 | 厦门宏发电力电器有限公司 | Electronic energy meter, diverter of electronic energy meter, sampling resistor disc and method for offsetting alternating magnetic field interference of circuit board |
| CN103926458B (en) * | 2014-04-30 | 2016-11-16 | 厦门宏发电力电器有限公司 | Electronic electric energy meter and diverter, sampling resistor sheet and the method for bucking circuit plate alternating magnetic field interference |
| CN107345977A (en) * | 2017-07-03 | 2017-11-14 | 杭州海兴电力科技股份有限公司 | The Wiring structure of the pin configuration of manganese copper diverter, pcb board and pcb board |
| CN107345977B (en) * | 2017-07-03 | 2020-01-17 | 杭州海兴电力科技股份有限公司 | Lead structure of manganin shunt, PCB and wiring structure of PCB |
| CN110836986A (en) * | 2019-11-25 | 2020-02-25 | 新沂市鑫洋电子有限公司 | Manganese-copper current divider for electronic electric energy meter and application thereof |
| CN110836987A (en) * | 2019-11-25 | 2020-02-25 | 新沂市鑫洋电子有限公司 | Manganese-copper shunt of three-phase intelligent electric energy meter and application thereof |
| CN110836987B (en) * | 2019-11-25 | 2021-12-24 | 新沂市鑫洋电子有限公司 | Manganese-copper shunt of three-phase intelligent electric energy meter and application thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20130515 |