CN212568918U - Electronic current sensor with error self-checking function - Google Patents
Electronic current sensor with error self-checking function Download PDFInfo
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- CN212568918U CN212568918U CN202020724698.2U CN202020724698U CN212568918U CN 212568918 U CN212568918 U CN 212568918U CN 202020724698 U CN202020724698 U CN 202020724698U CN 212568918 U CN212568918 U CN 212568918U
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- error self
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Abstract
The utility model discloses an electronic type current sensor of band error self-checking function, 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 solenoid on the magnetic core, the solenoid 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. A take electronic type current sensor of error self-checking function, measuring current that can be accurate can realize the error self-diagnosis of product and the judgement of preventing electricity theft through an error self-checking signal of error self-checking solenoid input.
Description
Technical Field
The utility model relates to a current sensor field especially relates to an electronic type current sensor of band error self-checking function.
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. In addition, the normal work of the current measuring module of the electric energy meter is ensured for preventing the electricity stealing caused by the outside human factor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a take electronic type current sensor of error self-checking function 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 the influence of power factor, accurate measuring current can realize the error self-diagnosis of product and the judgement of anti-electricity-theft through inputting an error self-checking signal to error self-checking solenoid.
In order to achieve the above purpose, the utility model provides a technical scheme is: including the shielding shell, inside left plastic support and the right plastic support of placing mutual joint of shielding shell, the joint has the magnetic core between left side plastic support and the right plastic support, the winding has the solenoid on the magnetic core, the solenoid 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 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: the electronic current sensor with the error self-checking function can measure current waveforms of different forms in a power grid, including alternating current, direct current and pulse current, can accurately measure current without being influenced by power factors, and can realize error self-diagnosis and anti-electricity-theft judgment of products by inputting an error self-checking signal to an error self-checking coil.
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 of the present invention;
fig. 4 is a structural view of the coil of the present invention.
Detailed Description
Example 1
As shown in fig. 1-4, an electronic current sensor with error self-checking function comprises a shielding shell 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 shell 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, the coil 5 comprises a secondary compensation coil 14 and an error self-checking coil 15, 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 crimped on the shielding shell 1, 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 current sheet 6 passes through the inlet 11, and the circuit board 7 is electrically connected with the coil 5.
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 and 4, the basic principle is as follows: a current measurement product is 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. The solenoid is provided with an error self-checking coil which is connected to the outside of the product through a circuit and K1 and K2 ports, and the electric energy meter can realize the error self-diagnosis of the product and the judgment of electricity larceny prevention by inputting an error self-checking signal to the error self-checking coil. Two groups of coils are arranged on the coil pack with the error self-checking function, and are independently wound on the magnetic core with the notch, and the secondary compensation coil is connected with a circuit board through a circuit and finally connected through output ports L1 and L2 of a product. The error self-test coil is finally connected with the ports K1 and K2 through a circuit and a circuit board.
The electronic current sensor with the error self-checking function can measure current waveforms of different forms in a power grid, including alternating current, direct current and pulse current, can not be influenced by power factors, accurately measure current, and can realize error self-diagnosis and anti-electricity-theft judgment of products by inputting an error self-checking signal to an error self-checking coil.
Claims (4)
1. The utility model provides a take electronic type current sensor of error self-checking function which characterized in that: including shielding shell (1), left plastic support (2) and right plastic support (3) of mutual joint have been 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 solenoid (5) to twine on magnetic core (4), solenoid (5) include secondary compensation coil (14) and error self-checking coil (15), solenoid (5) middle part is encircleed has electric current piece (6), lower part joint between left side plastic support (2) and right plastic support (3) has circuit board (7), matched with electric 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), shielding shell (1) crimping has apron (10), entry (11) have been seted up on apron (10), the circuit board (7) is electrically connected with a flat cable (12), the flat cable (12) penetrates through a flat cable channel (9) and an inlet (11), the current sheet (6) penetrates through the inlet (11), and the circuit board (7) is electrically connected with the coil (5).
2. The electronic current sensor with error self-checking function according to claim 1, wherein: the shielding shell (1) and the cover plate (10) are both made of pure iron through pressing.
3. The electronic current sensor with error self-checking function according to claim 1, wherein: the magnetic core (4) is a magnetic core with a notch.
4. The electronic current sensor with error self-checking function 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 |
|---|---|---|---|
| CN202020724698.2U CN212568918U (en) | 2020-05-07 | 2020-05-07 | Electronic current sensor with error self-checking function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020724698.2U CN212568918U (en) | 2020-05-07 | 2020-05-07 | Electronic current sensor with error self-checking function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212568918U true CN212568918U (en) | 2021-02-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020724698.2U Active CN212568918U (en) | 2020-05-07 | 2020-05-07 | Electronic current sensor with error self-checking function |
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| CN (1) | CN212568918U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116577544A (en) * | 2023-07-13 | 2023-08-11 | 江苏多维科技有限公司 | Current detection chip for power equipment |
| CN117347698A (en) * | 2023-10-31 | 2024-01-05 | 安徽希磁科技股份有限公司 | Current detection component, current detection circuit and power supply equipment |
-
2020
- 2020-05-07 CN CN202020724698.2U patent/CN212568918U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116577544A (en) * | 2023-07-13 | 2023-08-11 | 江苏多维科技有限公司 | Current detection chip for power equipment |
| CN116577544B (en) * | 2023-07-13 | 2023-09-26 | 江苏多维科技有限公司 | Current detection chip for power equipment |
| CN117347698A (en) * | 2023-10-31 | 2024-01-05 | 安徽希磁科技股份有限公司 | Current detection component, current detection circuit and power supply equipment |
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