CN112630483B - Power frequency magnetic field influence resistant shunt with hard connecting sheet attached to sampling pin - Google Patents
Power frequency magnetic field influence resistant shunt with hard connecting sheet attached to sampling pin Download PDFInfo
- Publication number
- CN112630483B CN112630483B CN202011346289.4A CN202011346289A CN112630483B CN 112630483 B CN112630483 B CN 112630483B CN 202011346289 A CN202011346289 A CN 202011346289A CN 112630483 B CN112630483 B CN 112630483B
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- Prior art keywords
- pin
- hard connecting
- current
- sampling
- current sampling
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- 238000005070 sampling Methods 0.000 title claims abstract description 146
- 239000004020 conductor Substances 0.000 claims abstract description 4
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- HPDFFVBPXCTEDN-UHFFFAOYSA-N copper manganese Chemical compound [Mn].[Cu] HPDFFVBPXCTEDN-UHFFFAOYSA-N 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/18—Screening arrangements against electric or magnetic fields, e.g. against earth's field
Abstract
The invention relates to the technical field of current dividers, and discloses a current divider which is provided with a hard connecting sheet on a sampling pin and resists the influence of a power frequency magnetic field, and the current divider comprises a sampling resistor sheet, wherein a first current sampling pin is vertically arranged at the upper part of the sampling resistor sheet in a left-hand direction, a second current sampling pin is vertically arranged at the lower part of the sampling resistor sheet in a right-hand direction, a hard connecting sheet serving as a conductor is vertically arranged on one surface of the sampling resistor sheet, a space is arranged between the hard connecting sheet and the plane of the sampling resistor sheet, the lower end of the hard connecting sheet is fixedly and electrically connected with the second current sampling pin, and a third current sampling pin electrically connected with the hard connecting sheet is fixedly arranged at the upper end of the hard connecting sheet. The invention realizes the automatic assembly of the current divider, and simultaneously ensures the effect of resisting the interference of the power frequency magnetic field without fine adjustment after assembly.
Description
Technical Field
The invention relates to the technical field of current dividers, in particular to a current divider which is provided with a hard connecting sheet on a sampling pin and resists the influence of a power frequency magnetic field.
Background
The electronic electric energy meter is one kind of electronic instrument equipment, and through real-time sampling of user's power supply voltage and current, special integrated circuit of the electric energy meter is adopted to process the sampled voltage and current signal and convert the sampled voltage and current signal into pulse output proportional to the electric energy, and the pulse output is displayed in counter or digital display.
In the prior art, a current sampling element made of a high-stability material such as manganese copper, i.e., a manganese copper shunt sheet, is generally used in an electronic electric energy meter. However, due to the interference of an external magnetic field, a self-induction current flows through the manganese-copper shunt sheet, so that the electric energy meter can have a current reading error, and the electric energy meter can measure the electricity consumption by mistake under the condition of no load. In order to solve the interference of the magnetic field, a scheme in the prior art is that a through hole is formed in the middle of a manganese-copper shunt sheet, two signal sampling wires are welded on an upper sampling foot and a lower sampling foot of the manganese-copper shunt sheet respectively, one signal sampling wire passes through the through hole in the middle of the manganese-copper shunt sheet and then is connected to a circuit board of an electronic electric energy meter together with the other signal sampling wire, so that a better magnetic field interference resistance effect can be achieved, and the effect of resisting a 0.5mT power frequency magnetic field is achieved.
However, this kind of electronic electric energy meter that can resist 0.5mT industrial frequency magnetic field interference still has following two drawbacks: firstly, because of the structural characteristics of a signal sampling line, automatic assembly cannot be adopted; secondly, because the signal sampling line is too soft, the position of the signal sampling line welded with the manganese copper splitter and the shape formed after the signal sampling line is welded are different, so that the difference exists between the resistance to the 0.5mT power frequency magnetic field interference, and the product is only required to be finely adjusted once again to confirm that the state network full-distribution requirement is met when the client side meter-loading test of the 0.5mT power frequency magnetic field interference is achieved.
Disclosure of Invention
In order to solve the problems, the invention provides a current divider with a hard connecting sheet added on a sampling pin and capable of resisting the influence of a power frequency magnetic field, which aims to realize automatic assembly of the current divider and ensure the effect of resisting the interference of the power frequency magnetic field without fine adjustment after assembly. The specific technical scheme is as follows:
the current divider comprises a sampling resistor piece, wherein a first current sampling pin is vertically arranged at the upper part of the sampling resistor piece in the left direction, and the sampling resistor piece and the first current sampling pin are integrally formed by stamping; a second current sampling pin is vertically arranged downwards at the right position of the lower part of the sampling resistor disc, and the sampling resistor disc and the second current sampling pin are integrally formed by stamping; the utility model discloses a sampling resistor, including the sampling resistor, be located the one side of sampling resistor still vertical be provided with one as the hard connection piece of electric conductor, just hard connection piece with be provided with the interval between the plane of sampling resistor, the lower extreme of hard connection piece with the second electric current sampling foot is fixed and the electricity is connected, the upper end of hard connection piece be fixed be provided with the third electric current sampling foot that the hard connection piece electricity is connected, just be provided with insulating distance between third electric current sampling foot and the sampling resistor.
Preferably, the hard connecting piece is located at a position between the first current sampling pin and the second current sampling pin in the left-right direction.
Preferably, a certain gap is arranged between the projection of the third current sampling pin on the plane of the sampling resistor disc and the first current sampling pin.
In the invention, the lower end of the hard connecting sheet is provided with a transverse rib, and the hard connecting sheet is fixed with the second current sampling pin through the transverse rib and is electrically connected with the second current sampling pin.
In order to increase rigidity, the number of the hard connecting pieces is one pair and the hard connecting pieces are respectively arranged on two sides of the sampling resistor piece, the lower ends of the hard connecting pieces are connected together, and the upper ends of the hard connecting pieces are respectively connected with the third current sampling pins, so that the sampling resistor piece penetrates through a ring formed by the hard connecting pieces, the transverse ribs and the third current sampling pins.
In the invention, an insulating seat is arranged on the sampling resistor disc, and the lower end of the third current sampling pin is fixed on the insulating seat.
Preferably, an insulating pad is disposed in the insulating seat, the insulating pad is used for blocking the electrical connection between the sampling resistor and the third current sampling pin, and the lower end of the third current sampling pin is connected to the insulating pad in the insulating seat.
The lower part of the insulating seat is provided with a groove body, and the insulating seat is connected with the sampling resistor disc through the groove body.
Preferably, the tank body is an open tank.
In the invention, a pair of hard connecting sheets are respectively arranged on the front side and the rear side of the insulating seat.
In the invention, the first current sampling pin, the second current sampling pin and the third current sampling pin are all hard connection pins.
In the invention, the shunt is arranged on a magnetic latching relay arranged in an electronic electric energy meter; the circuit board of electronic energy meter is the PCB plate structure, the shunt first electric current sample foot and third electric current sample foot respectively with the circuit board of electronic energy meter is connected.
The beneficial effects of the invention are as follows:
firstly, according to the power frequency magnetic field influence resistant shunt with the hard connecting piece attached to the sampling pin, through the hard connecting piece arranged between the second current sampling pin and the third current sampling pin, induced electromotive force generated between the hard connecting piece and the third current sampling pin by the interference magnetic field can be utilized to offset the induced electromotive force generated between the third current sampling pin, the first current sampling pin and the sampling resistor piece by the interference magnetic field, so that the power frequency magnetic field interference resistant effect of the shunt is ensured; and the hard connecting sheet structure and the hard connected sampling pins are beneficial to the automatic assembly of the current divider, and fine adjustment is not needed after the assembly.
And secondly, the hard connecting pieces are respectively arranged on the two sides of the sampling resistor piece to increase the rigidity of the hard connecting pieces, and the hard connecting pieces are matched with the insulating seats on the sampling resistor piece, so that the connection rigidity of the third current sampling pin can be greatly improved. The arrangement of the other pair of sampling resistor discs forms a symmetrical structure, which is beneficial to improving the antimagnetic effect.
Drawings
FIG. 1 is a schematic diagram of a shunt of the present invention with a hard connecting piece attached to the sampling pin to resist the influence of a power frequency magnetic field;
FIG. 2 is a schematic diagram of the structure of the sample resistor sheet of FIG. 1 after concealment;
FIG. 3 is a schematic view of the insulating base of FIG. 1 after being concealed;
fig. 4 is a schematic view of the shunt of fig. 1 disposed on a magnetic latching relay.
FIGS. 5 and 6 are schematic views of a variation of the structure relative to the flow splitter of FIG. 1;
in the figure: 10. the magnetic latching relay comprises a hard connecting sheet, 101, transverse ribs, 20, sampling resistor pieces, 201, first current sampling pins, 202, second current sampling pins, 40, an insulating base, 401, a groove body, 50, third current sampling pins, 60, insulating pads, 70 and a magnetic latching relay.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
Referring to fig. 1 to 3, an embodiment of a shunt with a hard connecting piece added on a sampling pin and resisting the influence of a power frequency magnetic field of the present invention includes a sampling resistor 20, a first current sampling pin 201 is vertically arranged at the upper left position of the sampling resistor 20, and the sampling resistor 20 and the first current sampling pin 201 are integrally formed by punching; a second current sampling pin 202 is vertically arranged downwards at the right position of the lower part of the sampling resistor piece 20, and the sampling resistor piece 20 and the second current sampling pin 202 are integrally formed by stamping; a hard connecting piece 10 serving as a conductor is further vertically arranged on one surface of the sampling resistor piece 20, a distance is arranged between the hard connecting piece 10 and the plane of the sampling resistor piece 220, the lower end of the hard connecting piece 10 is fixedly and electrically connected with the second current sampling pin 202, a third current sampling pin 50 electrically connected with the hard connecting piece 10 is fixedly arranged at the upper end of the hard connecting piece 10, and an insulation distance is arranged between the third current sampling pin 50 and the sampling resistor piece 20.
Preferably, the hard connection piece 10 is located between the first current sampling pin 201 and the second current sampling pin 202 in the left-right direction.
Preferably, a certain gap is provided between the projection of the third current sampling pin 50 on the plane of the sampling resistor 20 and the first current sampling pin 50.
In this embodiment, a transverse rib 101 is disposed at the lower end of the hard connecting piece 10, and the hard connecting piece 10 is fixed to and electrically connected with the second current sampling pin 202 through the transverse rib 101.
To increase the rigidity, the number of the hard connection pieces 10 is one pair and are respectively disposed on both sides of the sampling resistor piece 20, and the lower ends of the hard connection pieces 10 are connected together, and the upper ends of the hard connection pieces 10 are respectively connected with the third current sampling pins 50, so that the sampling resistor piece 20 passes through the loop formed by the hard connection pieces 10, the transverse ribs 101 and the third current sampling pins 50.
In this embodiment, an insulating base 40 is disposed on the sampling resistor 20, and the lower end of the third current sampling pin 50 is fixed on the insulating base 40.
The lower part of the insulating base 40 is provided with a groove 401, and the insulating base 40 and the sampling resistor 20 are connected through the groove 401.
Preferably, the groove 401 is an open groove.
In this embodiment, a pair of the hard connection pieces 10 are disposed on the front and rear sides of the insulating base 40.
In this embodiment, the first current sampling pin 201, the second current sampling pin 202 and the third current sampling pin 50 are all hard connection pins.
In this embodiment, the shunt is disposed on a magnetic latching relay 70 built in the electronic electric energy meter; the circuit board of the electronic electric energy meter is a PCB structure, and the first current sampling pin 201 and the third current sampling pin 50 of the current divider are respectively connected with the circuit board of the electronic electric energy meter.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (3)
1. The current divider is characterized by comprising a sampling resistor piece, wherein a first current sampling pin is vertically arranged at the upper left side of the sampling resistor piece, and the sampling resistor piece and the first current sampling pin are integrally formed by stamping; a second current sampling pin is vertically arranged downwards at the right position of the lower part of the sampling resistor disc, and the sampling resistor disc and the second current sampling pin are integrally formed by stamping; a hard connecting piece serving as a conductor is vertically arranged on two sides of the sampling resistor piece respectively, a distance is arranged between the hard connecting piece and the plane of the sampling resistor piece, the lower end of the hard connecting piece is fixedly and electrically connected with the second current sampling pin, a third current sampling pin electrically connected with the hard connecting piece is fixedly arranged at the upper end of the hard connecting piece, and an insulation distance is arranged between the third current sampling pin and the sampling resistor piece; the lower end of the hard connecting sheet is provided with a transverse rib, and the hard connecting sheet is fixed with the second current sampling pin through the transverse rib and is electrically connected with the second current sampling pin; the number of the hard connecting pieces is one pair and the hard connecting pieces are respectively arranged on two sides of the sampling resistor piece, the lower ends of the hard connecting pieces are connected together, and the upper ends of the hard connecting pieces are respectively connected with the third current sampling pins, so that the sampling resistor piece passes through a ring formed by the hard connecting pieces, the transverse ribs and the third current sampling pins;
the hard connecting sheet is positioned between the first current sampling pin and the second current sampling pin in the left-right direction; a certain gap is arranged between the projection of the third current sampling pin on the plane where the sampling resistor piece is located and the first current sampling pin; an insulating seat is arranged on the sampling resistor disc, and the lower end of the third current sampling pin is fixed on the insulating seat; an insulating pad is arranged in the insulating seat and used for blocking the electrical connection between the sampling resistor disc and a third current sampling pin, and the lower end of the third current sampling pin is connected to the insulating pad in the insulating seat; the lower part of the insulating seat is provided with a groove body, and the insulating seat is connected with the sampling resistor disc through the groove body; the hard connecting pieces are respectively arranged on the front side and the rear side of the insulating seat.
2. The shunt of claim 1 wherein said first current sample pin, said second current sample pin and said third current sample pin are hard-wired pins.
3. The shunt with the hard connecting sheet added on the sampling pin for resisting the influence of the power frequency magnetic field according to claim 1, wherein the shunt is arranged on a magnetic latching relay arranged in an electronic electric energy meter; the circuit board of electronic energy meter is the PCB plate structure, the shunt first electric current sample foot and third electric current sample foot respectively with the circuit board of electronic energy meter is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011346289.4A CN112630483B (en) | 2020-11-26 | 2020-11-26 | Power frequency magnetic field influence resistant shunt with hard connecting sheet attached to sampling pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011346289.4A CN112630483B (en) | 2020-11-26 | 2020-11-26 | Power frequency magnetic field influence resistant shunt with hard connecting sheet attached to sampling pin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112630483A CN112630483A (en) | 2021-04-09 |
| CN112630483B true CN112630483B (en) | 2024-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011346289.4A Active CN112630483B (en) | 2020-11-26 | 2020-11-26 | Power frequency magnetic field influence resistant shunt with hard connecting sheet attached to sampling pin |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113866468B (en) * | 2021-09-01 | 2024-02-23 | 杭州西力智能科技股份有限公司 | Hard-connection anti-interference shunt and electric energy meter |
| WO2023125625A1 (en) * | 2021-12-30 | 2023-07-06 | 厦门宏发电力电器有限公司 | Electromagnetic relay capable of performing measurement, and electronic electricity meter comprising same |
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