CN204117777U - Hall current sensor and magnet ring thereof - Google Patents
Hall current sensor and magnet ring thereof Download PDFInfo
- Publication number
- CN204117777U CN204117777U CN201420567398.2U CN201420567398U CN204117777U CN 204117777 U CN204117777 U CN 204117777U CN 201420567398 U CN201420567398 U CN 201420567398U CN 204117777 U CN204117777 U CN 204117777U
- Authority
- CN
- China
- Prior art keywords
- magnet ring
- void openings
- openings place
- magnetic field
- ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model relates to current sensing device, particularly relates to Hall current sensor part.The utility model proposes a kind of magnet ring, this magnet ring is the ring-type core body be made up of a permeability magnetic material, this magnet ring has the void openings that a spacing is the radial direction of Lg, this cut part in void openings place, and the height d making magnet ring void openings place excise residue face is less than magnet ring external diameter R and the magnet ring internal diameter r difference of magnet ring.The utility model also proposes a kind of Hall current sensor with above-mentioned magnet ring.The Hall current sensor that the utility model improves and magnet ring thereof, thus larger effective range can be obtained, for current detecting field.
Description
Technical field
The utility model relates to current sensing device, particularly relates to Hall current sensor part.
Background technology
Hall current sensor is the current measurement mode extensively adopted in electric power system.Hall current sensor based on magnetic balance type hall principle, i.e. closed loop principle.Consult shown in Fig. 1, the magnetic flux produced as primary current IP concentrates in magnetic circuit by high-quality magnetic core, Hall element is fixed in air gap and detects magnetic flux, by exporting reverse offset current around the multiturn coil on magnetic core, for offsetting the magnetic flux that former limit IP produces, magnetic flux in magnetic circuit is made to remain zero; And through the process of particular electrical circuit, the output of transducer can export the curent change of accurately reflection primary current.
Consult shown in Fig. 2 is the sectional structure of existing Hall current sensor, mainly comprise: the housing 1 closed of a ring-type, the ring of the inside of this housing 1 is provided with the ring-type iron core (or claiming magnet ring) 2 of the void openings of band one radial direction, encapsulation to be arranged in this housing 1 and to be positioned at the void openings place of this ring-type iron core 2, and to encapsulate the circuit board (not shown in FIG.) that is arranged in this housing 1 and be installed in the binding post 4(that this housing 1 is electrically connected with circuit board be outward generally 4).
But the magnet ring of existing Hall current sensor is because designing some parts that have much room for improvement of upper existence, cause (current measurement) scope of can effectively measuring of existing Hall current sensor not enough.
Utility model content
Therefore, the utility model proposes a kind of Hall current sensor and magnet ring thereof of improvement for this, thus can obtain larger effective range.
The utility model adopts following technical scheme to realize:
A kind of magnet ring, this magnet ring is the ring-type core body be made up of a permeability magnetic material, this magnet ring has the void openings that a spacing is the radial direction of Lg, this cut part in void openings place, and the height d making magnet ring void openings place excise residue face is less than magnet ring external diameter R and the magnet ring internal diameter r difference of magnet ring.
Wherein, the void openings place spacing Lg of this magnet ring is make the magnetic field intensity of the void openings place two side areas A2 of its this magnet ring under big current magnetic field roughly the same with the magnetic field intensity of magnet ring void openings place opposite inside region A1 with the adjusted value of the height d in excision residue face, magnet ring void openings place.
A kind of Hall current sensor, mainly comprise: the housing closed of a ring-type, the ring of the inside of this housing is provided with the magnet ring of the void openings of band one radial direction, encapsulation to be arranged in this housing and to be positioned at the void openings place of this magnet ring, and encapsulation is arranged on the circuit board in this housing and is installed in the outer binding post be electrically connected with circuit board of this housing, this magnet ring is the magnet ring of above-mentioned power.
The Hall current sensor that the utility model improves and magnet ring thereof, thus larger effective range can be obtained, for current detecting field.
Accompanying drawing explanation
Fig. 1 is the current detecting principle schematic of Hall current sensor;
Fig. 2 is the structural representation of Hall current sensor;
Fig. 3 is the spatial magnetic field schematic diagram of existing magnet ring under 1500 amperes, electric current;
Fig. 4 is the curve chart that be positioned at the magnetic field intensity at the void openings place of this magnet ring of existing magnet ring under 1500 amperes, electric current;
Fig. 5 is the spatial magnetic field schematic diagram of magnet ring under 1800 amperes, electric current after improving;
Fig. 6 is the curve chart that be positioned at the magnetic field intensity at the void openings place of this magnet ring of magnet ring under 1800 amperes, electric current after improving;
Fig. 7 is a kind of its each parameter mark schematic diagram of magnet ring improving magnet ring shape and structure;
Fig. 8 is the magnetic field distribution figure of magnet ring measured by under big current magnetic field of embodiment 1;
Fig. 9 is the magnetic field distribution figure of magnet ring measured by under big current magnetic field of embodiment 2;
Figure 10 is the magnetic field distribution figure of magnet ring measured by under big current magnetic field of embodiment 3;
Figure 11 is the magnetic field distribution figure of magnet ring measured by under big current magnetic field of embodiment 4;
Figure 12 is the magnetic field distribution figure of magnet ring measured by under big current magnetic field of embodiment 5;
Figure 13 is the magnetic field distribution figure of magnet ring measured by under big current magnetic field of embodiment 6.
Embodiment
Now with embodiment, the utility model is further illustrated by reference to the accompanying drawings.
Inventor is through studying with keen determination and test discovery in a large number: after the shape at the void openings place to the magnet ring in Hall current sensor changes, the magnetic conduction of this magnet ring can be caused to distribute change, after specific alteration of form, can obtain and compare the saturated effect in the more not easily magnetic field of not doing now the magnet ring of any alteration of form, thus make the Hall current sensor applying this improvement magnet ring may be used for measuring larger current value.
Consulting Fig. 3 and Fig. 4, is the curve chart of the magnetic field intensity of the spatial magnetic field situation of magnet ring under 1500 amperes, electric current (A) not doing any alteration of form in existing Hall current sensor and the void openings place being positioned at this magnet ring respectively.This magnet ring selects the magnet ring of the conventional size of the permalloy material of 1J85 model the most frequently used in Hall current sensor to test, visible in figure 3, and this magnet ring structure its Distribution of Magnetic Field under electric current 1500A has shown and substantially enters saturation condition; The void openings place of this magnet ring is the transverse axis coordinate of the distance of 0-5mm respectively from opening left-to-right in the diagram, it is completely saturated that the magnetic field at visible this magnet ring structure its void openings place under electric current 1500A has been tending towards intensity, and magnetic field intensity can't change to some extent along with the difference of void openings position.Thus show from the test result of Fig. 3 and Fig. 4, obviously select this Hall current sensor of test cannot Measurement accuracy current value under 1500 amperes (A).
Consult Fig. 5 and Fig. 6, select the magnet ring of the Hall current sensor identical with above-mentioned Fig. 3 with Fig. 4 (identical with dimensional parameters with the material of above-mentioned test magnet ring) to carry out after cutting changes to the shape at the void openings place of its magnet ring respectively, the spatial magnetic field situation under 1800 amperes, electric current (A) and be positioned at the curve chart of magnetic field intensity at void openings place of this magnet ring.There is Fig. 5 and Fig. 6 visible, carrying out cutting the Distribution of Magnetic Field under electric current 1800 A of the magnet ring after changing to the shape at the void openings place of magnet ring shows close to entering saturation condition, but not yet completely saturated (being better than the Distribution of Magnetic Field situation of conventional magnet ring under 1500A), the magnetic field at this magnet ring structure its void openings place under electric current 1800A is still not yet completely saturated, and magnetic field intensity also can have slight change along with the difference of void openings position.As can be seen here, when identical magnet ring material and size, carry out cutting the magnet ring structure of the improvement magnet ring structure after changing compared to routine for the shape at the void openings place of magnet ring, magnetic field more not easily occurs saturated, thus may be used for measuring higher current value.
Inventor continues a large amount of research work on the basis of the above and finds, is excise height d, the magnet ring external diameter R in residue face with magnet ring void openings place as shown in Figure 7 and magnet ring internal diameter r and magnet ring void openings place spacing Lg has relation by changing magnet ring shape and structure.Wherein, because the magnet ring external diameter R of the magnet ring of same material and size model and magnet ring internal diameter r is identical factor in, consideration can not be listed.Under the magnet ring of same material and size model, height d and the magnet ring void openings place spacing Lg in excision residue face, magnet ring void openings place are the principal elements affecting its final magnetic conduction magnetic field distribution.
Inventor finds after further research, as long as change height d and/or the magnet ring void openings place spacing Lg in excision residue face, magnet ring void openings place, when making the Distribution of Magnetic Field recorded on it meet certain, thus it is saturated to make the improvement magnet ring structure after change, compared to the magnet ring structure of routine, magnetic field not easily occur, may be used for measuring higher current value.Show through the experimental results: it is make under the effect in big current magnetic field that optimal magnet ring structure changes, the magnetic field intensity of magnet ring void openings place opposite inside region A1 is equal as far as possible with the magnetic field intensity of magnet ring void openings place two side areas A2, and such magnet ring may be used for measuring larger electric current.
Enumerate respectively below by the magnetic field distribution figure measured under big current magnetic field of the magnet ring structure after change magnet ring void openings place spacing Lg and after the height d in excision residue face, magnet ring void openings place.The magnet ring of several embodiments is below all adopt magnet ring material the most conventional in existing Hall current sensor and size model to test, as the permalloy material that magnet ring material is 1J85 model, the magnet ring external diameter R of magnet ring and magnet ring internal diameter r is 19.5 millimeters (mm) and 13 millimeters respectively.This rule that can refer to of the magnet ring of other magnet ring materials and size model draws, just exemplifies no longer one by one in this.
Embodiment 1: consult shown in Fig. 8, by advanced for the magnet ring void openings place of above-mentioned conventional magnet ring line cutting, the height d in excision residue face, this magnet ring void openings place is 6.5mm, then carry out adjustment to magnet ring void openings place spacing Lg to change, this magnet ring void openings place spacing Lg changes into 3mm, but carries out the result figure of magnetic field intensity test.As seen from the figure, the magnetic field intensity of this magnet ring void openings place two side areas A2 can be larger than the magnetic field intensity of magnet ring void openings place opposite inside region A1, and this magnet ring structure is not still very perfect condition.
Embodiment 2: consult shown in Fig. 9, by advanced for the magnet ring void openings place of above-mentioned conventional magnet ring line cutting, the height d in excision residue face, this magnet ring void openings place is 6.5mm, then carry out adjustment to magnet ring void openings place spacing Lg to change, this magnet ring void openings place spacing Lg changes into 5mm, but carries out the result figure of magnetic field intensity test.As seen from the figure, the magnetic field intensity of this magnet ring void openings place two side areas A2 is roughly the same with the magnetic field intensity of magnet ring void openings place opposite inside region A1, and this magnet ring structure is more satisfactory state.
Embodiment 3: consult shown in Figure 10, by advanced for the magnet ring void openings place of above-mentioned conventional magnet ring line cutting, the height d in excision residue face, this magnet ring void openings place is 6.5mm, then carry out adjustment to magnet ring void openings place spacing Lg to change, this magnet ring void openings place spacing Lg changes into 8mm, but carries out the result figure of magnetic field intensity test.As seen from the figure, the magnetic field intensity of this magnet ring void openings place two side areas A2 can be less than the magnetic field intensity of magnet ring void openings place opposite inside region A1, and this magnet ring structure is not still very perfect condition.
Embodiment 4: consult shown in Figure 11, that above-mentioned conventional magnet ring is first carried out otch, make it have the magnet ring void openings that magnet ring void openings place spacing Lg is 5mm, and then Linear cut is carried out to it, thus the height d making this magnet ring void openings place excise residue face is 3.3mm, but carry out the result figure of magnetic field intensity test.As seen from the figure, the magnetic field intensity of this magnet ring void openings place two side areas A2 can be larger than the magnetic field intensity of magnet ring void openings place opposite inside region A1, and this magnet ring structure is not still very perfect condition.
Embodiment 5: consult shown in Figure 12, that above-mentioned conventional magnet ring is first carried out otch, make it have the magnet ring void openings that magnet ring void openings place spacing Lg is 5mm, and then Linear cut is carried out to it, thus the height d making this magnet ring void openings place excise residue face is 5mm, but carry out the result figure of magnetic field intensity test.As seen from the figure, the magnetic field intensity of this magnet ring void openings place two side areas A2 is roughly the same with the magnetic field intensity of magnet ring void openings place opposite inside region A1, and this magnet ring structure is more satisfactory state.
Embodiment 6: consult shown in Figure 13, that above-mentioned conventional magnet ring is first carried out otch, make it have the magnet ring void openings that magnet ring void openings place spacing Lg is 5mm, and then Linear cut is carried out to it, thus the height d making this magnet ring void openings place excise residue face is 10.1mm, but carry out the result figure of magnetic field intensity test.As seen from the figure, the magnetic field intensity of this magnet ring void openings place two side areas A2 can be less than the magnetic field intensity of magnet ring void openings place opposite inside region A1, and this magnet ring structure is not still very perfect condition.
More visible by above-described embodiment 1-3, the advanced line cutting at the magnet ring void openings place of magnet ring, when the height d in excision residue face, this magnet ring void openings place is identical, when adjustment magnet ring void openings place spacing Lg is to suitable size, make the magnetic field intensity of this magnet ring void openings place two side areas A2 roughly the same with the magnetic field intensity of magnet ring void openings place opposite inside region A1, then this magnet ring structure is in (the relatively more not easily magnetic saturation of more satisfactory state, thus the measurement of more big current value can be carried out to higher current value response), the magnet ring of excessive or too small magnet ring void openings place spacing Lg, the magnetic field intensity of its void openings place two side areas A2 and the magnetic field intensity of magnet ring void openings place opposite inside region A1 can be variant, and the structure of nonideality.
And, more visible by above-described embodiment 4-6, that above-mentioned conventional magnet ring is first carried out otch, make it have the magnet ring void openings of same magnetic annular space gap opening part spacing Lg, and then to its carry out appropriate level (namely magnet ring void openings place excision residue face height d be modulated to the best) Linear cut time, make the magnetic field intensity of this magnet ring void openings place two side areas A2 roughly the same with the magnetic field intensity of magnet ring void openings place opposite inside region A1, then this magnet ring structure is in (the relatively more not easily magnetic saturation of more satisfactory state, thus the measurement of more big current value can be carried out to higher current value response), the magnet ring of excessive or too small magnet ring void openings place spacing Lg, the magnetic field intensity of its void openings place two side areas A2 and the magnetic field intensity of magnet ring void openings place opposite inside region A1 can be variant, and the structure of nonideality.
In addition, conventional magnet ring is carried out otch and Linear cut simultaneously, the height d in its magnet ring void openings place spacing Lg and excision residue face, magnet ring void openings place is adjusted simultaneously, also the magnetic field intensity of this magnet ring void openings place two side areas A2 can be made roughly the same with the magnetic field intensity of magnet ring void openings place opposite inside region A1, obtain the magnet ring structure that is in more satisfactory state.The magnet ring structure of 2 ideal states from above-described embodiment 2 and embodiment 5, the magnet ring void openings place spacing Lg of magnet ring structure of the ideal state that the height d adjusting magnet ring void openings place spacing Lg and excision residue face, magnet ring void openings place respectively obtains and the height d in excision residue face, magnet ring void openings place is also comparatively close to (d=6.5mm, Lg=5mm in embodiment 2; D=5mm, lg=5mm in embodiment 5), and wherein on magnet ring wire cutting after magnet ring void openings place excision residue face height d be the more leading factor affecting magnet ring effect.
Inventor shows through a large amount of measurement, select the magnet ring of above-mentioned routine, namely magnet ring material is the permalloy material of 1J85 model, the magnet ring external diameter R of magnet ring and magnet ring internal diameter r is that the magnet ring of 19.5 mm and 13mm carries out otch and Linear cut respectively, make the height d in its magnet ring void openings place spacing Lg and excision residue face, magnet ring void openings place respectively in following scope, specifically: Lg is the scope between 4mm to 6.5mm, d is the scope between 4.5mm to 7.5mm, the magnet ring structure of more satisfactory state can be obtained, compare conventional magnet ring structure and there is larger magnetic saturation intensity, thus larger effective range can be obtained.
Select other material and the magnet ring of size to carry out height d that otch and Linear cut change adjustment magnet ring void openings place spacing Lg and/or excision residue face, magnet ring void openings place, thus make the magnetic field intensity of its void openings place two side areas A2 roughly the same with the magnetic field intensity of magnet ring void openings place opposite inside region A1, also magnet ring structure can be made to be in more satisfactory state (relatively more not easily magnetic saturation, thus the measurement can carrying out more big current value to higher current value response).
To sum up, the utility model proposes a kind of magnet ring, this magnet ring is the ring-type core body be made up of a permeability magnetic material, this magnet ring (after carrying out otch) has the void openings that a spacing is the radial direction of Lg, this void openings place is by (after carrying out Linear cut) excision part, and the height d making magnet ring void openings place excise residue face is less than magnet ring external diameter R and the magnet ring internal diameter r difference of magnet ring.Wherein, the void openings place spacing Lg of this magnet ring is make the magnetic field intensity of the void openings place two side areas A2 of its this magnet ring under big current magnetic field roughly the same with the magnetic field intensity of magnet ring void openings place opposite inside region A1 with the adjusted value of the height d in excision residue face, magnet ring void openings place.
Supplementary notes, the shape of the ring-type core body of this magnet ring, except the circular core body cited by the various embodiments described above, can be the ring-type core body of non-annulus, as elliptical ring core body, regular polygon core body (as octagon ring) etc.; The material of the ring-type core body of this magnet ring is except the permalloy material of the 1J85 model of the routine cited by the various embodiments described above simultaneously, can also be other similar permeability magnetic materials, as the material such as silicon steel sheet, other model permalloy, amorphous and nanometer crystal alloys, ferrocart core, iron sial, ferrite.
The utility model also proposes a kind of Hall current sensor, this Hall current sensor and existing Hall current sensor similar, mainly comprise: the housing closed of a ring-type, the ring of the inside of this housing is provided with the magnet ring of the void openings of band one radial direction, encapsulation to be arranged in this housing and to be positioned at the void openings place of this magnet ring, and encapsulation is arranged on the circuit board in this housing and is installed in the outer binding post be electrically connected with circuit board of this housing, wherein this magnet ring is the magnet ring with said structure.
Although specifically show in conjunction with preferred embodiment and describe the utility model; but those skilled in the art should be understood that; not departing from the spirit and scope of the present utility model that appended claims limits; can make a variety of changes the utility model in the form and details, be protection range of the present utility model.
Claims (3)
1. a magnet ring, this magnet ring is the ring-type core body be made up of a permeability magnetic material, this magnet ring has the void openings that a spacing is the radial direction of Lg, this cut part in void openings place, and the height d making magnet ring void openings place excise residue face is less than magnet ring external diameter R and the magnet ring internal diameter r difference of magnet ring.
2. magnet ring according to claim 1, is characterized in that: the void openings place spacing Lg of this magnet ring is make the magnetic field intensity of the void openings place two side areas A2 of its this magnet ring under big current magnetic field roughly the same with the magnetic field intensity of magnet ring void openings place opposite inside region A1 with the adjusted value of the height d in excision residue face, magnet ring void openings place.
3. a Hall current sensor, mainly comprise: the housing closed of a ring-type, the ring of the inside of this housing is provided with the magnet ring of the void openings of band one radial direction, encapsulation to be arranged in this housing and to be positioned at the void openings place of this magnet ring, and encapsulation is arranged on the circuit board in this housing and is installed in the outer binding post be electrically connected with circuit board of this housing, it is characterized in that: this magnet ring is the arbitrary described magnet ring of the claims 1-2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420567398.2U CN204117777U (en) | 2014-09-29 | 2014-09-29 | Hall current sensor and magnet ring thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420567398.2U CN204117777U (en) | 2014-09-29 | 2014-09-29 | Hall current sensor and magnet ring thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204117777U true CN204117777U (en) | 2015-01-21 |
Family
ID=52335066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420567398.2U Active CN204117777U (en) | 2014-09-29 | 2014-09-29 | Hall current sensor and magnet ring thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204117777U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104217843A (en) * | 2014-09-29 | 2014-12-17 | 厦门振泰成科技有限公司 | Hall current sensor and magnetic ring thereof as well as method for measuring high current by using hall current sensor |
-
2014
- 2014-09-29 CN CN201420567398.2U patent/CN204117777U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104217843A (en) * | 2014-09-29 | 2014-12-17 | 厦门振泰成科技有限公司 | Hall current sensor and magnetic ring thereof as well as method for measuring high current by using hall current sensor |
| CN104217843B (en) * | 2014-09-29 | 2016-08-24 | 厦门振泰成科技有限公司 | Hall current sensor and magnet ring thereof, realize Hall current sensor for the method measuring big electric current |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203672938U (en) | AC-DC universal leakage-current sensor | |
| CN203191419U (en) | Intelligent electricity meter with diamagnetic structured electromagnetic current transformers | |
| CN104217843B (en) | Hall current sensor and magnet ring thereof, realize Hall current sensor for the method measuring big electric current | |
| CN204117777U (en) | Hall current sensor and magnet ring thereof | |
| CN207197432U (en) | Eddy current effect thickness transducer | |
| CN202905386U (en) | Magnetic core of anti-direct current (DC) current transformer | |
| CN102360891B (en) | Multi-transformation ratio current transformer | |
| CN201749142U (en) | Double-coil current sensor | |
| CN208736925U (en) | A kind of closed-loop current sensors | |
| CN207586301U (en) | Half opening iron core closed-loop current sensors | |
| CN203798887U (en) | Open-loop Hall current sensor | |
| CN202854212U (en) | Manganin current sampling device with external magnetic field interference resistance | |
| CN104269260B (en) | Micro electric minor transformer and preparation method | |
| CN205193252U (en) | Permanent magnetic ferrite magnetic shoe magnetic flow test location frock | |
| CN202710642U (en) | Improved current sensor | |
| CN203366981U (en) | Electronic current transformer with air-gap iron core with groove | |
| CN103884899A (en) | Rogowski coil for large-current rapid pulse measurement | |
| CN203406126U (en) | Hollow coil provided with closed magnetic circuit | |
| CN202305637U (en) | Alternating current sensor | |
| CN206281962U (en) | Device of the test interference fit to electric machine iron core yoke portion performance impact | |
| CN202421290U (en) | Improved current sensor | |
| CN102854368A (en) | Manganin current sampling device resisting outside magnetic field interference | |
| CN205920013U (en) | A anchor clamps for obtaining AGMI effect | |
| CN205656225U (en) | Invariable amplitude direct current pulse signal measuring circuit | |
| CN203490375U (en) | Miniature inductive proximity sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |