CN212965132U - Multi-range low-cost current sensor - Google Patents
Multi-range low-cost current sensor Download PDFInfo
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- CN212965132U CN212965132U CN202021842772.7U CN202021842772U CN212965132U CN 212965132 U CN212965132 U CN 212965132U CN 202021842772 U CN202021842772 U CN 202021842772U CN 212965132 U CN212965132 U CN 212965132U
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- current sensor
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- magnetic field
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Abstract
The invention provides a multi-range low-cost current sensor which is characterized in that a magnetic conducting material forms a semi-closed magnetic conducting magnetic circuit, the width of an air gap at a semi-closed opening of the magnetic conducting material is unequal, the air gap has at least two widths, a magnetic field is generated in a magnetic ring and the air gap by current penetrating through the semi-closed magnetic ring formed by the magnetic conducting material, uneven magnetic field distribution is formed in the air gap, and at least two magnetic field induction intensity sensors are placed at positions with different magnetic field induction intensities.
Description
Technical Field
The invention relates to a multi-range low-cost current sensor.
Background
In recent years, C-type magnetic ring current sensors have been widely used, particularly for detecting large currents. However, in some occasions, large current and small current need to be detected at the same time, and the detection precision needs to be ensured, so that the requirement cannot be met by adopting the existing C-shaped magnetic ring type current sensor.
Disclosure of Invention
1) Solves the technical problem
After the traditional C-shaped magnetic ring type current sensor is designed, the detection precision of one measuring range can be ensured, the detection precision of small current cannot be ensured, and in order to ensure the detection precision of small current, a mode of improving precision is required, so that the cost is greatly increased. Or another small-range current sensor, which increases not only cost but also volume and weight.
2) Technical scheme
The invention provides a multi-range low-cost current sensor which is characterized in that a magnetic conducting material forms a semi-closed magnetic conducting magnetic circuit, the width of an air gap at a semi-closed opening of the magnetic conducting material is unequal, the air gap has at least two widths, a magnetic field is generated in a magnetic ring and the air gap by current penetrating through the semi-closed magnetic ring formed by the magnetic conducting material, uneven magnetic field distribution is formed in the air gap, and at least two magnetic field induction intensity sensors are placed at positions with different magnetic field induction intensities, as shown in figure 1. In the air gaps with different widths, the magnetic induction intensity is different, the magnetic induction intensity is higher at the narrow part, and the magnetic induction intensity is lower at the wide part, as shown in fig. 2. When the current is small, the current is detected using the magnetic field in the air gap having a narrow width. When the current is large, the current is detected by using the magnetic field in the air gap at the wide position. Therefore, the detection of large current and the detection of small current can be simultaneously considered.
The magnetizer is made of silicon steel sheet or ferrite or permalloy and other soft magnetic materials.
The magnetic field induction intensity sensor adopts a Hall element.
The magnetizer is provided with a small hole for fixing so as to fix the current sensor.
The magnetizer is formed by laminating a plurality of silicon steel sheets.
3) Advantageous effects
The multi-range low-cost current sensor designed by the mode has the advantages of low cost, almost no increase of volume and weight, and high current and low current detection precision.
Drawings
Fig. 1 is an overall schematic diagram of the sensor, in fig. 1, 1 is a magnetizer, 2 is a current conductor, and 3 and 4 are magnetic induction sensors. Fig. 2 is a magnetic force line distribution diagram of the sensor, in fig. 2, 1 is a magnetizer, 2 is a current conductor, and 3 and 4 are magnetic induction sensors.
Detailed Description
The invention provides a multi-range low-cost current sensor which is characterized in that a magnetic conducting material 1 forms a semi-closed magnetic conducting magnetic circuit, the width of an air gap at a semi-closed opening of the magnetic conducting material is unequal, the air gap has at least two widths, a magnetic field is generated in a magnetic ring and the air gap by current passing through the semi-closed magnetic ring formed by the magnetic conducting material 1, uneven magnetic field distribution is formed in the air gap, and at least two magnetic field induction intensity sensors 3 and 4 are arranged at positions with different magnetic field induction intensities.
The magnetizer 1 is made of silicon steel sheets or ferrite or permalloy and other soft magnetic materials.
The magnetic field induction intensity sensors 3 and 4 are hall elements.
The magnetizer 1 is provided with a small hole for fixing so as to fix the current sensor.
The magnetizer 1 is formed by laminating a plurality of silicon steel sheets.
Claims (7)
1. A multi-range low-cost current sensor is characterized in that a semi-closed magnetic conduction magnetic circuit is formed by magnetic conduction materials, the width of an air gap at a semi-closed opening of the magnetic conduction materials is unequal, the air gap has at least two widths, a magnetic field is generated in a magnetic ring and the air gap by current penetrating through a semi-closed magnetic ring formed by the magnetic conduction materials, uneven magnetic field distribution is formed in the air gap, and at least two magnetic field induction intensity sensors are placed at positions with different magnetic field induction intensities.
2. A multi-range low cost current sensor according to claim 1, wherein the material of the magnetic conductor is silicon steel sheet.
3. A multi-range low cost current sensor according to claim 1, wherein the material of the magnetic conductor is ferrite.
4. A multi-range low cost current sensor according to claim 1 wherein the material of the magnetic conductor is permalloy.
5. A multi-range, low cost current sensor according to claim 1, wherein the magnetic field strength sensor is a hall element.
6. A multi-range low cost current sensor according to claim 1, wherein the magnetic conductor has an aperture for attachment.
7. The multi-range low-cost current sensor according to claim 2, wherein the magnetic conductor is formed by laminating a plurality of silicon steel sheets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021842772.7U CN212965132U (en) | 2020-08-29 | 2020-08-29 | Multi-range low-cost current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021842772.7U CN212965132U (en) | 2020-08-29 | 2020-08-29 | Multi-range low-cost current sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212965132U true CN212965132U (en) | 2021-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021842772.7U Active CN212965132U (en) | 2020-08-29 | 2020-08-29 | Multi-range low-cost current sensor |
Country Status (1)
| Country | Link |
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| CN (1) | CN212965132U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116539942A (en) * | 2023-07-06 | 2023-08-04 | 深圳市知用电子有限公司 | Magnetic flux detection system and current sensor |
-
2020
- 2020-08-29 CN CN202021842772.7U patent/CN212965132U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116539942A (en) * | 2023-07-06 | 2023-08-04 | 深圳市知用电子有限公司 | Magnetic flux detection system and current sensor |
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