CN203858296U - Electronic type electric energy meter, current diverter thereof and sampling resistor sheet - Google Patents
Electronic type electric energy meter, current diverter thereof and sampling resistor sheet Download PDFInfo
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- CN203858296U CN203858296U CN201420220411.7U CN201420220411U CN203858296U CN 203858296 U CN203858296 U CN 203858296U CN 201420220411 U CN201420220411 U CN 201420220411U CN 203858296 U CN203858296 U CN 203858296U
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- sampling resistor
- resistor sheet
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Abstract
The utility model provides an electronic type electric energy meter, a current diverter thereof and a sampling resistor. The current diverter comprises a first conducting sheet, a sampling resistor sheet and a second conducting sheet; the sampling resistor sheet is connected between the first conducting sheet and the second conducting sheet; the sampling resistor sheet and a circuit board are arranged at intervals and are not vertical to each other; the sampling resistor sheet is provided with a first sampling endpoint, a second sampling endpoint and a through hole, wherein the through hole is formed in the sampling resistor sheet and deviates from the center of the sampling resistor sheet; the sampling resistor sheet is divided into a first induction area and a second induction area by a second signal line, wherein the first induction area is not equal to the second induction area; under the effect of an alternating magnetic field, first induction current is generated in the first induction area, and second induction current is generated in the second induction area; the polarities of the first induction current and the second induction current are opposite; the magnitudes of the first induction current and the second induction current are not equal; induction current exists on the circuit board, the difference value of the first induction current and the second induction current is equal to the magnitude of the induction current on the circuit board.
Description
Technical field
The utility model relates to electronic instrument technical field, particularly relates to a kind of electronic electric energy meter can bucking circuit plate alternating magnetic field disturbing and included shunt and sampling resistor sheet thereof.
Background technology
Electronic electric energy meter is a kind of electronic instrument equipment, and it passes through customer power supply voltage and current real-time sampling, compute power consumption.Our household electricity is alternating current, and the electric field of variation can produce magnetic field, and electronic electric energy meter is made up of a lot of components and parts, under the interference in magnetic field, can produce induction current, brings error in dipping.Fig. 1 shows a kind of existing electronic electric energy meter, and shunt 100 and circuit board 106 all can be subject to magnetic interference and produce induction current, cause error in dipping.In order to eliminate the error of metering, a kind of electronic electric energy meter has been proposed at present, as shown in Figure 2, offer through hole 121 at sampling resistor Pian12 center, signal wire is divided into two regions that area is equal through through hole 121 by sampling resistor sheet 12, forms loop S1 ', the S2 ' of two current opposite in direction, due to faradic opposite sign but equal magnitude in loop S1 ', S2 ' in region, therefore can cancel out each other, thereby eliminate the magnetic interference that sampling resistor sheet 12 is subject to self.But, be subject to magnetic interference, on circuit board, also can form a magnetic induction area, produce induction current, just need to pass through other approach, for example, chip is set on circuit board, with this chip offset with circuit board on induction current, but the method not only significantly improves the manufacturing cost of electric energy meter, and make electric energy meter structure complicated, efficiency is manufactured in impact.
Utility model content
Based on the problems referred to above, electronic electric energy meter and shunt and sampling resistor sheet that the utility model provides a kind of bucking circuit plate alternating magnetic field to disturb.
For reaching above-mentioned purpose, the utility model provides a kind of shunt, comprise: the first conducting strip, sampling resistor sheet and the second conducting strip, sampling resistor sheet is connected between the first conducting strip and the second conducting strip, and with circuit board interval and non-perpendicular setting, sampling resistor sheet is provided with the first sampling end points, the second sampling end points and through hole, the first sampling end points and the second sampling end points are located at the relative both sides of sampling resistor sheet, through hole is arranged on sampling resistor sheet, and departs from sampling resistor Pian center; Wherein, the first end of first signal line is connected in the first sampling end points, the first end of secondary signal line is connected in the second sampling end points and through stranded with first signal line spiral after through hole, the second end of first signal line and the second end of secondary signal line are connected respectively on circuit board; Sampling resistor sheet is divided into the first induction area and the second induction area by secondary signal line, and the first induction area is not equal to the second induction area, under the effect of alternating magnetic field, in the first induction area, produce the first induction current, in the second induction area, produce the second induction current, the first induction current is contrary with the second induction current polarity, and size is unequal, on circuit board, have induction current, the first induction current exists induction current polarity contrary with on the second faradic difference and circuit board.
Wherein, circuit board and sampling resistor sheet be arranged in parallel.
Wherein, on the first induction current and the second faradic difference and circuit board, there is induction current equal and opposite in direction.
Wherein, through hole is arranged on the length direction center line of sampling resistor sheet.
Wherein, the first sampling end points is protruded out and is formed by a lateral edges of sampling resistor sheet, and the second sampling end points is protruded out and formed by the relative opposite side edge of sampling resistor sheet.
Wherein, the first sampling end points has into the first L shaped connecting portion and the first weld part, and the first connecting portion is from vertical the protruding out of a lateral edges of sampling resistor sheet, and the first weld part is bent to form perpendicular to the first connecting portion; The second sampling end points has into the second L shaped connecting portion and the second weld part, and the second connecting portion protrudes out from the opposite side edge-perpendicular of sampling resistor sheet, and the second weld part is bent to form perpendicular to the second connecting portion.
Wherein, the length of the first weld part equals the length of the second weld part, and the first end of the first end of first signal line and secondary signal line is converted into laterally and welds with corresponding the first weld part and the second weld part.
Wherein, the length of the first weld part is less than the length of the second weld part, and the first end of secondary signal line is converted into laterally and welds with the second weld part.
Wherein, the length of the first weld part is greater than the length of the second weld part, and the first end of first signal line is converted into laterally and welds with the first weld part.
The utility model also provides a kind of sampling resistor sheet, and it is the above-mentioned included sampling resistor sheet of shunt.
The utility model also provides a kind of electronic electric energy meter, and it comprises circuit board, first, second signal wire and above-mentioned shunt.
Utility model the utility model is compared to the beneficial effect of prior art: in the utility model, be set to respect to the skew in various degree of the symcenter of sampling resistor sheet by through hole, the faradic direction that regulates sampling resistor sheet generated by magnetic interference, by adjusting the distance of through hole with respect to resistor disc symcenter, the faradic size that regulates sampling resistor sheet generated by magnetic interference, thereby by the induction current in induction current difference bucking circuit plate.Therefore, sampling resistor sheet of the present utility model can not only be eliminated the magnetic interference of self, more can reduce or eliminate the suffered magnetic interference of circuit board, and shunt of the present utility model can coordinate other elements of the electronic electric energy meters such as existing circuit board, signal wire to use, therefore compared with the existing scheme that must set up chip in circuit board, the utility model not only can be eliminated the magnetic interference of circuit board, more can not cause cost significantly to promote, and affects the packaging efficiency of electric energy meter.
Brief description of the drawings
Fig. 1 is a kind of structural representation of existing electronic electric energy meter.
Fig. 2 is the structural representation of another kind of existing electronic electric energy meter.
Fig. 3 is the stereographic map of electronic electric energy meter of the present utility model, wherein not shown circuit board.
Fig. 4 is the vertical view of electronic electric energy meter of the present utility model, wherein not shown circuit board.
Fig. 5 is the vertical view of electronic electric energy meter of the present utility model, wherein shows circuit board.
Fig. 6 is the stereographic map of electronic electric energy meter of the present utility model
Fig. 7 is the schematic diagram of an embodiment of shunt of the present utility model.
Fig. 8 is the schematic diagram of another embodiment of shunt of the present utility model.
Fig. 9 is the schematic diagram of the another embodiment of shunt of the present utility model.
Figure 10 is the schematic diagram of the another embodiment of shunt of the present utility model.
Figure 11 is the schematic diagram of the another embodiment of shunt of the present utility model.
Embodiment
Below with reference to accompanying drawing, example embodiment is more fully described.But example embodiment can be implemented in a variety of forms, and should not be understood to be limited to embodiment set forth herein; On the contrary, provide these embodiments to make the utility model more comprehensively with complete, and the design of example embodiment is conveyed to those skilled in the art all sidedly.In the drawings, for clear, may exaggerate the thickness of region and layer.Identical in the drawings Reference numeral represents same or similar structure, thereby will omit their detailed description.
In addition, described feature, structure or characteristic can be combined in one or more embodiment in any suitable manner.In the following description, thus provide many details to provide fully understanding embodiment of the present utility model.But, one of skill in the art will appreciate that and can put into practice the technical solution of the utility model and there is no one or more in described specific detail, or can adopt other method, constituent element, material etc.In other cases, be not shown specifically or describe known features, material or operation to avoid fuzzy major technique intention of the present utility model.
With reference to the schematic diagram of the electronic electric energy meter shown in Fig. 3,4,5,6, the utility model provides a kind of electronic electric energy meter that disturbed by alternating magnetic field, and it comprises: shunt 1, circuit board 2 and first signal line 3 and secondary signal line 4.Shunt 1 comprises the first conducting strip 10, sampling resistor sheet 11 and the second conducting strip 12.Shunt 1 is arranged on the exit of a side of relay (not shown) by the first conducting strip 10.Wherein, sampling resistor sheet 11 adopts high resistivity material to be made, and the present embodiment is for adopting copper-manganese, high resistivity material can also be the material of other types, such as constantan etc., the first conducting strip 10 and the second conducting strip 12 adopt fine copper, can be also other conductive materials.Sampling resistor sheet 11 is connected between the first conducting strip 10 and the second conducting strip 12, sampling resistor sheet 11 is provided with through hole H, the first sampling end points 111 and the second sampling end points 112, the first sampling end points 111 and the second sampling end points 112 are located at the relative both sides of sampling resistor sheet 11, and through hole H is eccentric setting on sampling resistor sheet 11.The first sampling end points and the second sampling end points are not limited to be arranged on sampling resistor sheet, can be located at other positions of the relative both sides of shunt, for example, in other embodiments, also can be located on first, second conducting strip.The setting that circuit board 2 is non-perpendicular with sampling resistor sheet 11 intervals, therefore, there is induction area S3 in partial circuit plate 2.The first end of first signal line 3 is connected in the first sampling end points 111, the first end of secondary signal line 4 is connected in the second sampling end points 112 and through stranded with first signal line 3 spirals after through hole H, the second end of first signal line 3 and the second end of secondary signal line 4 are connected respectively on circuit board 2.
As shown in shade in Fig. 4, sampling resistor sheet 11 is divided into the first induction area S1 and the second induction area S2 by secondary signal line 4, and the first induction area S1 is not equal to the second induction area S2.
Under the effect of alternating magnetic field, can produce magnetic direction disturbs perpendicular to the alternating magnetic field of sampling resistor sheet 11, as shown in Figure 4, in the first induction area S1, there is closed-loop path, within a time period, the first faradic flow direction forming in this closed-loop path is D1, in the second induction area S2, has closed-loop path, within this time period, the second faradic flow direction forming in this closed-loop path is D2.Because the first faradic flow direction is contrary with the second faradic flow direction, and the first induction area S1 is not equal to the second induction area S2, therefore, the first induction current and the second faradic varying in size, and polarity is contrary, make the two partial offset, make like this sampling resistor sheet 11 its induction current be planar the first induction current and the second faradic difference.Circuit board 2 is also in magnetic field, make the first induction current exist induction current polarity contrary with on the second faradic difference and circuit board, therefore this difference can with the induction area of circuit board 2 in induction current cancel out each other, thereby reduce the magnetic interference that circuit board is subject to.Be more than taking the induction current in section sometime as example describes, should be appreciated that under the effect of alternating magnetic field, first, second faradic polarity is contrary in each time period.
In the present embodiment, circuit board 2 be arranged in parallel with sampling resistor sheet 11, and as shown in 5,6 figure, sampling resistor sheet 11 is spent by bending 90, with the induction current in bucking circuit plate 2 as much as possible.
Be preferably, as shown in Figure 5, on circuit board 2, there is induction area S3, in induction area S3, produce induction current, make the first induction current contrary with the induction current equal and opposite in direction polarity of the second faradic difference and circuit board 2, thereby the whole induction currents in can bucking circuit plate 2, eliminate the magnetic interference that circuit board 2 is subject to completely.
The size of induction current difference and polarity are determined by the eccentric degree of through hole H, be specially: as shown in Figure 4, if through hole H is near the second sampling end points 112, the first induction area S1 is greater than the second induction area S2, because first, second induction current in closed-loop path in first, second induction area S1, S2 flows to contrary, therefore, in the larger induction area of the polarity of the first induction current and the second faradic difference and area, faradic polarity is identical, identical with the first faradic polarity.Because faradic size is directly proportional to induction area, therefore, through hole H is larger near the degree of the second sampling end points 112, and induction current difference is larger.Thereby utilize the position of eccentric through hole H to control faradic polarity, control faradic size by the distance size that regulates through hole H.
In the present embodiment, as Fig. 7, shown in 8, the length direction of sampling resistor sheet 11 is for crossing the first conducting strip 10, the direction of sampling resistor sheet 11 and the second conducting strip 12, through hole H is arranged in the length direction centre line L of sampling resistor sheet 11, can determine when through hole H is in length direction centre line L when diverse location by test, varying in size of induction current difference, thereby manufacture the sampling resistor sheet 11 of different size, the position difference of through hole H on each sampling resistor sheet 11, can choose corresponding sampling resistor sheet 11 according to the faradic polarity existing on circuit board and size.Therefore, can improve the manufacturer's standard degree of sampling resistor sheet 11, improve the packaging efficiency of electric energy meter.The position of through hole H is not limited to this, and it can be arranged on the optional position except symcenter on sampling resistor sheet 11, and staff can be by the faradic size of measuring, diverse location generation is determined in experiment.
In the present embodiment, the first sampling end points 111 is protruded out and is formed by a lateral edges of sampling resistor sheet 11, and the second sampling end points 112 is protruded out and formed by the relative opposite side edge of sampling resistor sheet 11.
As shown in Figure 9, the first sampling end points 111 has into the first L shaped connecting portion 1111 and the first weld part 1112, the first connecting portion 1111 is from vertical the protruding out of a lateral edges of sampling resistor sheet 11, and the first weld part 1112 is bent to form perpendicular to the first connecting portion 1111; The second sampling end points 112 has into the second L shaped connecting portion 1121 and the second weld part 1122, the second connecting portions 1121 from the protruding out of the opposite side edge-perpendicular of sampling resistor sheet 11, and the second weld part 1122 is bent to form perpendicular to the second connecting portion 1121.
In addition, the sampling layout of end points and the Type of Welding of signal wire have impact for the size of induction area, affect accordingly the size of induction current difference.Fig. 9 to Figure 11 shows the various deformation example of sampling end points.
As shown in Figure 9, the length of the first weld part 1112 equals the length of the second weld part 1122, and the first end of the first end of first signal line 3 and secondary signal line 4 is converted into laterally and welds with corresponding the first weld part 1112 and the second weld part 1122.
As shown in figure 10,1112 length of the first weld part are less than the length of the second weld part 1122, and the first end of secondary signal line 4 is converted into laterally and welds with the second weld part 1122.
As shown in figure 11, the length of the first weld part 1112 is greater than the length of the second weld part 1122, and the first end of first signal line 3 is converted into laterally and welds with the first weld part 1112.
It is a kind of for offsetting the method for the magnetic interference that the circuit board of above-mentioned electronic electric energy meter is subject to that the utility model also provides, and it comprises the following steps:
The faradic polarity and the size that on metering circuit plate 2, exist;
On sampling resistor sheet 11, offer the through hole H of eccentric setting;
It is stranded with first signal 3 line spirals after the first end of secondary signal line 4 is connected in to the second sampling end points 112 and passes through hole H, the second end of first signal line 3 and the second end of secondary signal line 4 are connected respectively on circuit board 2, circuit board 2 and employing resistor disc interval and non-perpendicular setting;
Sampling resistor sheet 11 is divided into the first induction area S1 and the second induction area S2 by secondary signal line 4, and the first induction area S1 is not equal to the second induction area S2, the closed-loop path current opposite in direction of two induction areas, therefore the first induction current C1 producing in the first induction area S1, the the second induction current C2 producing in the second induction area S2, the first induction current C1 and the second induction current C2 opposite direction, and size is unequal, faradic polarity on difference and the circuit board 2 of the first induction current C1 and the second induction current C2 is contrary, thereby on bucking circuit plate 2, there is induction current at least partly, corresponding the reducing of magnetic interference that circuit board 2 is subject to.
Wherein, the step that should offer the through hole H of eccentric setting on sampling resistor sheet 11 comprises: by regulating the position of through hole H to change the size of the first induction area S1 and the second induction area S2, make the corresponding change of size of the first induction current C1 and the second induction current C2, with contrary with the faradic polarity existing on circuit board 2, equal and opposite in direction, thereby on bucking circuit plate 2, there is induction current, eliminate the magnetic interference that circuit board is subject to.
Wherein, this step that offer eccentric setting through hole H on sampling resistor sheet 11 comprises: in the length direction centre line L of sampling resistor sheet 11, offer through hole H.
In sum, in the utility model, be set to respect to the skew in various degree of the symcenter of sampling resistor sheet by through hole, for example the through hole on sampling resistor sheet is relatively near the first conducting strip or the second conducting strip, the faradic polarity that regulates sampling resistor sheet generated by magnetic interference, by adjusting the distance of through hole with respect to resistor disc symcenter, the faradic size that regulates sampling resistor sheet generated by magnetic interference, thereby by the induction current in induction current difference bucking circuit plate, improve the ability of the anti-alternating magnetic field interference of electric energy meter.Therefore, sampling resistor sheet of the present utility model can not only be eliminated the magnetic interference of self, more can offset or eliminate the suffered magnetic interference of circuit board, and shunt of the present utility model can coordinate other elements of the electronic electric energy meters such as existing circuit board, signal wire to use, therefore compared with the existing scheme that must set up chip in circuit board, the utility model not only can be eliminated the magnetic interference of circuit board, more can not cause cost significantly to promote, and affects the packaging efficiency of electric energy meter.
Although described the utility model with reference to several exemplary embodiments, should be appreciated that term used is explanation and exemplary and nonrestrictive term.Because the utility model can specifically be implemented in a variety of forms and not depart from spirit or the essence of utility model, so be to be understood that, above-described embodiment is not limited to any aforesaid details, and explain widely in the spirit and scope that should limit in the claim of enclosing, therefore fall into whole variations in claim or its equivalent scope and remodeling and all should be the claim of enclosing and contain.
Claims (11)
1. a shunt, it is applied to electronic electric energy meter, and electronic electric energy meter comprises circuit board and first, second signal wire, it is characterized in that: shunt comprises:
The first conducting strip, sampling resistor sheet and the second conducting strip, sampling resistor sheet is connected between the first conducting strip and the second conducting strip, and with circuit board interval and non-perpendicular setting, sampling resistor sheet is provided with the first sampling end points, the second sampling end points and through hole, the first sampling end points and the second sampling end points are located at the relative both sides of sampling resistor sheet, through hole is arranged on sampling resistor sheet, and departs from sampling resistor Pian center;
Wherein, the first end of first signal line is connected in the first sampling end points, the first end of secondary signal line is connected in the second sampling end points and through stranded with first signal line spiral after through hole, the second end of first signal line and the second end of secondary signal line are connected respectively on circuit board; Sampling resistor sheet is divided into the first induction area and the second induction area by secondary signal line, and the first induction area is not equal to the second induction area, under the effect of alternating magnetic field, in the first induction area, produce the first induction current, in the second induction area, produce the second induction current, the first induction current is contrary with the second induction current polarity, and size is unequal, on circuit board, have induction current, the first induction current exists induction current polarity contrary with on the second faradic difference and circuit board.
2. shunt as claimed in claim 1, is characterized in that, circuit board and sampling resistor sheet be arranged in parallel.
3. shunt as claimed in claim 2, is characterized in that, on the first induction current and the second faradic difference and circuit board, has induction current equal and opposite in direction.
4. shunt as claimed in claim 3, is characterized in that, through hole is arranged on the length direction center line of sampling resistor sheet.
5. shunt as claimed in claim 1, is characterized in that, the first sampling end points is protruded out and formed by a lateral edges of sampling resistor sheet, and the second sampling end points is protruded out and formed by the relative opposite side edge of sampling resistor sheet.
6. shunt as claimed in claim 5, it is characterized in that, the first sampling end points has into the first L shaped connecting portion and the first weld part, and the first connecting portion is from vertical the protruding out of a lateral edges of sampling resistor sheet, and the first weld part is bent to form perpendicular to the first connecting portion; The second sampling end points has into the second L shaped connecting portion and the second weld part, and the second connecting portion protrudes out from the opposite side edge-perpendicular of sampling resistor sheet, and the second weld part is bent to form perpendicular to the second connecting portion.
7. shunt as claimed in claim 6, is characterized in that, the length of the first weld part equals the length of the second weld part, and the first end of the first end of first signal line and secondary signal line is converted into laterally and welds with corresponding the first weld part and the second weld part.
8. shunt as claimed in claim 6, is characterized in that, the length of the first weld part is less than the length of the second weld part, and the first end of secondary signal line is converted into laterally and welds with the second weld part.
9. shunt as claimed in claim 6, is characterized in that, the length of the first weld part is greater than the length of the second weld part, and the first end of first signal line is converted into laterally and welds with the first weld part.
10. a sampling resistor sheet, is characterized in that: it is the included sampling resistor sheet of shunt described in any one in claim 1 to 9.
11. 1 kinds of electronic electric energy meters, is characterized in that: it comprises circuit board, first, second signal wire and shunt as claimed in any one of claims 1-9 wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420220411.7U CN203858296U (en) | 2014-04-30 | 2014-04-30 | Electronic type electric energy meter, current diverter thereof and sampling resistor sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420220411.7U CN203858296U (en) | 2014-04-30 | 2014-04-30 | Electronic type electric energy meter, current diverter thereof and sampling resistor sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203858296U true CN203858296U (en) | 2014-10-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420220411.7U Withdrawn - After Issue CN203858296U (en) | 2014-04-30 | 2014-04-30 | Electronic type electric energy meter, current diverter thereof and sampling resistor sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203858296U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109959821A (en) * | 2018-10-11 | 2019-07-02 | 郭建国 | A kind of high-precision intelligent ammeter based on current divider |
-
2014
- 2014-04-30 CN CN201420220411.7U patent/CN203858296U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109959821A (en) * | 2018-10-11 | 2019-07-02 | 郭建国 | A kind of high-precision intelligent ammeter based on current divider |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141001 Effective date of abandoning: 20161012 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |