CN212568917U - Electronic current sensor for electric energy meter - Google Patents
Electronic current sensor for electric energy meter Download PDFInfo
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- CN212568917U CN212568917U CN202020724697.8U CN202020724697U CN212568917U CN 212568917 U CN212568917 U CN 212568917U CN 202020724697 U CN202020724697 U CN 202020724697U CN 212568917 U CN212568917 U CN 212568917U
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- plastic support
- current
- energy meter
- magnetic core
- electric energy
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- 238000004804 winding Methods 0.000 claims abstract description 10
- 238000006073 displacement reaction Methods 0.000 claims abstract description 8
- 238000002788 crimping Methods 0.000 claims abstract description 3
- 230000005611 electricity Effects 0.000 claims abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
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Abstract
The utility model discloses an electronic type current sensor for electric energy meter, including the shielding shell, left plastic support and right plastic support of mutual joint are placed to shielding shell inside, the joint has the magnetic core between left side plastic support and the right plastic support, the winding has the coil on the magnetic core, the coil middle part is around there being the electric current piece, lower part joint between left side plastic support and the right plastic support has the circuit board, matched with electric current piece passageway has been seted up in left side plastic support and the right plastic support respectively, the winding displacement passageway has still been seted up in the left side plastic support, the crimping has the apron on the shielding shell, the entry has been seted up on the apron, the circuit board electricity is connected with the winding displacement. The circuit board is electrically connected with the coil. A electronic type current sensor for electric energy meter, can measure the electric current wave form of different forms in the electric wire netting, including interchange, direct current and pulse current, can not receive power factor's influence, accurate measuring current.
Description
Technical Field
The utility model relates to a current sensor field especially relates to an electronic type current sensor for electric energy meter.
Background
With the complication of the power utilization environment of the power grid and the diversification of the types of the power utilization equipment, the current existing in the power grid is not only in the form of a single sinusoidal waveform of 50/60Hz, but also in the form of various direct current and even harmonics, pulse waveforms, spike waves, square waves and various higher harmonics. The national grid company also gives higher test standard requirements to the electric energy meter in new standards, and does not require the electric energy meter to accurately measure a single sinusoidal current waveform any more, but also requires that a current measuring module of the electric energy meter can deal with waveform currents in various forms, and particularly can accurately measure errors of direct current and even harmonic waves under different power factor environments, such as the condition that the power factor is 0.5L. The traditional electromagnetic mutual inductor used by the existing electric energy meter is easy to saturate under the condition of direct current waveform, and cannot accurately measure the current.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an electronic type current sensor for electric energy meter solves traditional electromagnetic type mutual-inductor and takes place saturation phenomenon easily under the direct current waveform condition, can't carry out the problem of accurate measurement to the electric current.
In order to achieve the above purpose, the utility model provides a technical scheme is: including the shielding case, inside left plastic support and the right plastic support of placing mutual joint of shielding case, the joint has the magnetic core between left side plastic support and the right plastic support, the winding has the coil on the magnetic core, the coil middle part is around having the electric current piece, lower part joint between left side plastic support and the right plastic support has the circuit board, matched with electric current piece passageway has been seted up in left side plastic support and the right plastic support respectively, the winding displacement passageway has still been seted up in the left side plastic support, the crimping has the apron on the shielding case, the entry has been seted up on the apron, the circuit board electricity is connected with the winding displacement, the winding displacement passes winding displacement passageway and entry, the electric current piece passes the entry. The circuit board is electrically connected with the coil.
Furthermore, the shielding shell and the cover plate are both made of pure iron through pressing.
Further, the magnetic core is a notched magnetic core.
Further, magnetic induction chip is installed to the breach department of magnetic core.
The utility model has the advantages that: an electronic current sensor for an electric energy meter can measure current waveforms of different forms in a power grid, including alternating current, direct current and pulse current, and can accurately measure current without being influenced by power factors.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is an exploded view of the present invention;
fig. 3 is an electrical schematic diagram of the present invention.
Detailed Description
Example 1
As shown in fig. 1-2, an electronic current sensor for an electric energy meter comprises a shielding case 1, a left plastic support 2 and a right plastic support 3 which are connected with each other in a clamped manner are placed inside the shielding case 1, a magnetic core 4 is connected between the left plastic support 2 and the right plastic support 3 in a clamped manner, a coil 5 is wound on the magnetic core 4, an electric current sheet 6 is wound around the middle part of the coil 5, a circuit board 7 is connected between the left plastic support 2 and the right plastic support 3 in a clamped manner, matched electric current sheet channels 8 are respectively arranged in the left plastic support 2 and the right plastic support 3, a flat cable channel 9 is further arranged in the left plastic support 2, a cover plate 10 is connected with the shielding case 1 in a pressed manner, an inlet 11 is arranged on the cover plate 10, the circuit board 7 is electrically connected with a flat cable 12, the flat cable 12 passes through the flat cable channel 9 and the inlet 11, the electric current sheet, the circuit board 7 and the coil 5 are electrically connected.
The shielding shell 1 and the cover plate 10 are both made of pure iron through pressing.
The magnetic core 4 is a magnetic core with a notch.
And a magnetic induction chip 13 is arranged at the notch of the magnetic core 4.
The magnetic core 4 is a high-permeability magnetic core, the coil 5 is wound on the magnetic core 4, the magnetic induction chip 13 is installed at the notch of the magnetic core 4, the magnetic induction chip 13 is connected with the coil 5 through a circuit, the coil 5 is connected with the circuit board 7 through a circuit, and the current sheet 6 penetrates through the magnetic core 4 with the notch.
As shown in fig. 3, the basic principle: the electronic current sensor for the electric energy meter is a current measuring product developed based on a tunneling magneto-resistance Technology (TMR) and a closed-loop principle. When a certain current is conducted in the primary current sheet Ip, a magnetic field is generated in the high-permeability magnetic core with the notch, the magnetic induction chip assembled in the notch of the magnetic core generates corresponding differential voltage by inducing magnetic fields with different sizes, the differential voltage is amplified by the first operational amplifier and the second operational amplifier, a reference current is formed in the secondary compensation coil, and the reference current outputs a secondary sampling current corresponding to the alternating current passing through the primary current line through the two external output interfaces L1 and L2. Therefore, the electronic transformer of the intelligent electric meter can keep high-precision measurement of current without being influenced by power factors. The influence error of direct current and even harmonic in an alternating current line is very small, the error is within 1% under the condition that the power factor is 1.0 and 0.5L, and the coil is connected with a circuit board through a circuit and finally connected through output ports L1 and L2 of a product.
The electronic current sensor for the electric energy meter can measure current waveforms of different forms in a power grid, including alternating current, direct current and pulse current, and can accurately measure current without being influenced by power factors.
Claims (4)
1. An electronic current sensor for an electric energy meter, comprising: including shielding shell (1), left plastic support (2) and right plastic support (3) of mutual joint are placed to shielding shell (1) inside, the joint has magnetic core (4) between left side plastic support (2) and right plastic support (3), it has coil (5) to twine on magnetic core (4), coil (5) middle part is encircleed there is current piece (6), lower part joint between left side plastic support (2) and right plastic support (3) has circuit board (7), matched with current piece passageway (8) have been seted up respectively in left side plastic support (2) and right plastic support (3), winding displacement passageway (9) have still been seted up in left side plastic support (2), the crimping has apron (10) on shielding shell (1), entry (11) have been seted up on apron (10), circuit board (7) electricity is connected with winding displacement (12), the flat cable (12) penetrates through the flat cable channel (9) and the inlet (11), the current sheet (6) penetrates through the inlet (11), and the circuit board (7) is electrically connected with the coil (5).
2. An electronic current sensor for an electric energy meter according to claim 1, wherein: the shielding shell (1) and the cover plate (10) are both made of pure iron through pressing.
3. An electronic current sensor for an electric energy meter according to claim 1, wherein: the magnetic core (4) is a magnetic core with a notch.
4. An electronic current sensor for an electric energy meter according to claim 3, wherein: and a magnetic induction chip (13) is arranged at the notch of the magnetic core (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020724697.8U CN212568917U (en) | 2020-05-07 | 2020-05-07 | Electronic current sensor for electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020724697.8U CN212568917U (en) | 2020-05-07 | 2020-05-07 | Electronic current sensor for electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212568917U true CN212568917U (en) | 2021-02-19 |
Family
ID=74608256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020724697.8U Active CN212568917U (en) | 2020-05-07 | 2020-05-07 | Electronic current sensor for electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212568917U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114296015A (en) * | 2021-12-20 | 2022-04-08 | 宁波泰丰源电气有限公司 | Sensor electromagnetic induction subassembly |
-
2020
- 2020-05-07 CN CN202020724697.8U patent/CN212568917U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114296015A (en) * | 2021-12-20 | 2022-04-08 | 宁波泰丰源电气有限公司 | Sensor electromagnetic induction subassembly |
| CN114296015B (en) * | 2021-12-20 | 2023-09-26 | 宁波泰丰源电气有限公司 | Sensor electromagnetic induction assembly |
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