CN202939211U - Hall current detection apparatus - Google Patents
Hall current detection apparatus Download PDFInfo
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- CN202939211U CN202939211U CN 201220697442 CN201220697442U CN202939211U CN 202939211 U CN202939211 U CN 202939211U CN 201220697442 CN201220697442 CN 201220697442 CN 201220697442 U CN201220697442 U CN 201220697442U CN 202939211 U CN202939211 U CN 202939211U
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- hall element
- hall
- current
- electric current
- carrying conductor
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Abstract
The utility model provides a Hall current detection apparatus. The apparatus comprises a current-carrying conductor, a Hall sensor which can be rotatablely arranged on the current-carrying conductor, a circuit board connected with a Hall element and an output lead connected to the circuit board. The Hall current detection apparatus possesses a wide current detection scope and detection precision is high.
Description
Technical field
The utility model relates to a kind of Hall electric current detecting apparatus, for detection of the electric current that flows through in conductor, belongs to electrician's detection technique field.
Background technology
The general current transformer that adopts detects the electric current that flows through in conductor.Traditional current transformer mainly comprises three parts: iron core, winding and Secondary Winding, wherein, winding and Secondary Winding are respectively on iron core, in addition, also have a load (as resistance) to be connected on Secondary Winding, the ultimate principle of such current transformer is identical with the principle of general single transformer or voltage transformer (VT), is all that voltage by detecting load or electric current detect the electric current that flows through in winding.
afterwards, utilization along with Hall effect, utilize the current transformer that Hall element is made to be widely used in current detecting, wherein, Hall element is used for substituting the Secondary Winding of conventional current mutual inductor, the principle of work of such current transformer is: when in conductor during current flowing, will respond to corresponding magnetic field in iron core, because Hall element is placed in this magnetic field, the magnetic line of force in this magnetic field passes Hall element, Hall element is converted into voltage signal output with the magnetic flux in magnetic field, and make the electric current that flows through in output voltage signal and conductor linear within the specific limits by corresponding testing circuit, just can detect the electric current that flows through in conductor accordingly.
Above-mentioned two kinds of current transformers all comprise iron core, and in fact existing current transformer structurally generally all arranges iron core.For example, the disclosed Hall electric current detecting apparatus of Chinese patent literature CN 101013144A is fixed on iron core on circuit board, Hall element is placed in the air-gap of iron core; And for example, the disclosed Hall current sensor of Chinese patent literature CN201145706Y comprises the annular core with radial gap, and Hall element also is placed in the annular core space.The disclosed current transformer of above-mentioned document when being used for current detecting, when alive in conductor will be on iron core induced field, detect this magnetic field by Hall element, realize the detection to the electric current that passes through in conductor.Adopt the advantage of core structure to be: for little current detecting, due to magnetic field a little less than, sometimes be difficult to detect, thereby make the precision of little current detecting reduce, adopt the iron core can be so that magnetic field concentration, thereby improve the precision of little current detecting.But when the electric current that passes through in conductor was larger, the magnetic flux that produces in iron core can present non-linear, thereby caused the variation of mutual inductor coefficient of mutual inductance, and then reduced accuracy of detection; In addition, be subject to the restriction of the frequecy characteristic of the volume of iron core own and material, adopt the current transformer of core structure can't detect DC current and higher frequency current response (as intermediate frequency 400 ~ 2K hertz peculiar to vessel).
In sum, can't take into account little current detection accuracy and checking of great current precision with cored conductor current pick-up unit in prior art, and, can't realize the detection of higher frequency current response and DC current, and then sensing range is narrower.
The utility model content
Therefore, the technical problems to be solved in the utility model is to overcome in prior art the defects with cored conductor current pick-up unit, thereby provide a kind of conductor current pick-up unit, this device is not subjected to the restriction of iron core characteristics (saturated, frequency response), have wider current detecting scope, and can take into account the accuracy of detection of little current detection accuracy and large electric current.
For this reason, the utility model provides a kind of Hall electric current detecting apparatus, comprises current－carrying conductor, the rotatable Hall element on described current－carrying conductor, the circuit board that is connected with described Hall element and the output lead on the described circuit board of connection of being arranged on.
Also comprise the shell that is arranged on described current－carrying conductor, described shell has container cavity and fairlead, described container cavity is used for holding described Hall element and described circuit board, described fairlead is used for described output lead is guided in the described container cavity outside of described shell, and described shell can produce upper-lower position with described Hall element and relatively move.
Described shell is fixed by securing member and described current－carrying conductor.
The bottom of described Hall element arranges heat insulating mattress, has mounting hole on described heat insulating mattress, and described securing member passes described mounting hole described heat insulating mattress is fixed on described current－carrying conductor.
Also comprise radome, described radome is socketed on described current－carrying conductor and covers in the top of described Hall element.
Described radome is that ferromagnetic material is made.
Described shell is plastic casing.
Described Hall element and described welding circuit board are fixed.
The Hall electric current detecting apparatus that the utility model provides has the following advantages:
1. the Hall electric current detecting apparatus that provides of the utility model comprises current－carrying conductor, rotatablely is arranged on Hall element, the circuit board that is connected with described Hall element on described current－carrying conductor and is connected to output lead on described circuit board.described Hall electric current detecting apparatus has omitted the utilization of iron core, the Hall electric current detecting apparatus of having avoided the available technology adopting core structure due to be subject to core characteristics (saturated, frequency response) the narrower defective of the sensing range of limitting, thereby improved the sensing range of Hall electric current detecting apparatus, simultaneously, due to the utilization of having omitted iron core, even when passing through larger electric current in current－carrying conductor, also can not cause because of core sataration the extreme of accuracy of detection to reduce, thereby improve the accuracy of detection of Hall electric current detecting apparatus when carrying out checking of great current, in addition, Hall electric current detecting apparatus of the present utility model, although when little current detecting, can't carry out magnetic field concentration by iron core, but, be arranged on described current－carrying conductor because Hall element is rotatable, before use, it can be by changing the relative position relation of Hall element sensitive surface and current－carrying conductor, thereby change the magnetic flux that passes Hall element, obtain better magnetic field induction position (being the maximum position of the magnetic line of force in unit area) with this, and then improved the precision of little current detecting, and can calibrate by the relative position relation that changes Hall element and current－carrying conductor, and this kind calibrating mode changes with respect to traditional passing through the mode that coefficient of mutual inductance is calibrated, reduced operation easier.
2. the Hall electric current detecting apparatus that provides of the utility model, also comprise the shell that is arranged on described current－carrying conductor, described shell has container cavity and fairlead, described container cavity is used for holding described Hall element and described circuit board, described fairlead is used for described output lead is guided in the described container cavity outside of described shell, and described shell can produce upper-lower position with described Hall element and relatively move.Shell is set can strengthens protection for Hall element, in addition, described shell is provided be used to the container cavity that holds Hall element, and described container cavity can carry out upper-lower position with described Hall element and relatively moves.Such structural design described in the utility model makes when calibration and only need to operate Hall element, can realize the definite function to the optimum magnetic field position, and is simple to operate.
3. the Hall electric current detecting apparatus that provides of the utility model, also comprise radome, and described radome is socketed on described current－carrying conductor and covers in the top of described Hall element.Often need to detect simultaneously three-phase current in relay, motor protector and control and protective switching device (CPS); when using three band Hall elements (at this; Hall element by shell, be arranged on Hall element on shell, be connected with Hall element and the output lead that stretches out from shell and the circuit board that is connected with Hall element form) current－carrying conductor when carrying three-phase current; radome has played the effect that intercepts the magnetic field phase mutual interference of adjacent current－carrying conductor, has guaranteed the precision that detects.
Description of drawings
For content of the present utility model is more likely to be clearly understood, the below is described in further detail the utility model, wherein according to specific embodiment of the utility model also by reference to the accompanying drawings
Fig. 1 is the position view of Hall element of the present utility model and current－carrying conductor;
Fig. 2 is the schematic diagram after Hall element of the present utility model, circuit board, output lead connection;
Fig. 3 is the schematic diagram of plastic casing of the present utility model;
Fig. 4 is the schematic diagram after the Hall element that adds fluid sealant of the present utility model, circuit board and output lead are installed;
Fig. 5 is the schematic diagram after Hall element of the present utility model, circuit board, output lead, shell and current－carrying conductor are installed;
Fig. 6 is the schematic diagram after Hall element of the present utility model, circuit board, output lead, shell, current－carrying conductor and radome are installed;
Fig. 7 is the schematic appearance of the Hall electric current detecting apparatus that is used for the three-phase current detection device that provides of the utility model;
Fig. 8 is the structural representation that can be applicable to waist-shaped hole of the present utility model.
Wherein, Reference numeral is expressed as:
The 1-Hall element; The 2-current－carrying conductor; The 3-circuit board; The 4-output lead; The 5-shell; The 51-container cavity; The 52-fairlead; The 53-through hole; The 54-lug; The 6-securing member; The 7-heat insulating mattress; The 8-radome; The 9-fluid sealant.
Embodiment
As shown in Figure 1 and Figure 2, the present embodiment provides a kind of Hall electric current detecting apparatus, comprises that current－carrying conductor 2, rotatable Hall element 1 on described current－carrying conductor 2, the circuit board 3 that is fixedly connected with by welding manner with described Hall element 1 and the output lead 4(that is fixed on described circuit board 3 by welding manner of being arranged on see Fig. 5).
the Hall electric current detecting apparatus that the present embodiment provides has omitted the utilization of iron core, the Hall electric current detecting apparatus of having avoided the available technology adopting core structure due to be subject to core characteristics (saturated, frequency response) the narrower defective of the sensing range of limitting, thereby improved the sensing range of Hall electric current detecting apparatus, simultaneously, due to the utilization of having omitted iron core, even when passing through larger electric current in current－carrying conductor 2, also can not cause because of core sataration the reduction of accuracy of detection, thereby improve the accuracy of detection of Hall electric current detecting apparatus when carrying out checking of great current, in addition, Hall electric current detecting apparatus of the present utility model, although when little current detecting, can't carry out magnetic field concentration by iron core, but, be arranged on described current－carrying conductor 2 because Hall element 1 is rotatable, before use, it can be by the sensitive surface of change Hall element 1 and the relative position relation of current－carrying conductor 2, thereby change the magnetic flux that passes Hall element 1, obtain better magnetic field induction position (being the maximum position of the magnetic line of force in unit area) with this, and then improved the precision of little current detecting, and can calibrate by the sensitive surface of change Hall element 1 and the relative position relation of current－carrying conductor 2, and this kind calibrating mode changes with respect to traditional passing through the mode that coefficient of mutual inductance is calibrated, reduced operation easier.In order further to improve accuracy of detection, the sensitive surface of described Hall element 1 is adjusted to the magnetic field that produces with described current－carrying conductor 2 vertical.
Need to prove, be arranged on this technical characterictic on described current－carrying conductor 2 for described Hall element 1 is rotatable, its main purpose is to change the sensitive surface of passing Hall element 1 and the relative position relation (angular relationship) of current－carrying conductor 2, and then changes the magnetic line of force quantity of the sensitive surface of passing described Hall element 1.Reaching under the prerequisite of this purpose, Hall element 1 of the present utility model is unrestricted with respect to described current－carrying conductor 2 rotation modes.
The present embodiment provides a kind of concrete rotation mode, as Fig. 3, Fig. 4 and shown in Figure 6, described Hall electric current detecting apparatus also comprises the shell 5 that is arranged on described current－carrying conductor 2 bottom it, described shell 5 has container cavity 51 and fairlead 52, described container cavity 51 is used for holding described Hall element 1 and described circuit board 3, described fairlead 52 is used for described output lead 4 is guided in the described container cavity 51 outside of described shell 5, and described shell 5 can produce upper-lower position with described Hall element 1 and relatively move.in order to reach the purpose of rotating Hall element 1, at least one through hole 53 can be set in the bottom of shell 5, and the position corresponding with described through hole 53 arranges the mounting hole (see figure 8) of passing for screw on current－carrying conductor 2, described screw passes through hole 53 and mounting hole successively, be arranged on described current－carrying conductor 2 shell 5 is rotatable, wherein, the head of screw is stuck on the outer arm of through hole 53, when needs rotation case 5, only need to adjust described screw through hole 53 in and the position in mounting hole just can reach the purpose of change shell 5 and described current－carrying conductor 2 relative position relations, thereby make described Hall element 1 relatively described current－carrying conductor 2 under the drive of described shell 5 produce position movement.And adjust precision in order further to improve, and then raising accuracy of detection, space change and the Angulation changes of Hall element 1 with current－carrying conductor 2 can be combined, realize the combination of coarse adjustment and accurate adjustment, be specially, change the relative position up and down of described Hall element 1 and described shell 5, thereby coarse adjustment is carried out with this in the change gap, rotates described shell 5 and then drives Hall element 1 rotation, thereby the change angle realizes accurate adjustment with this.
After adjusting, in order to keep adjusting effect, can be at the interior perfusion fluid sealant 9 of container cavity 51, make fluid sealant 9 can fill gap between Hall element 1 and container cavity 51, guarantee higher fixed effect.
In the present embodiment, described shell 5 is plastic casings, and certainly, described shell 5 can also adopt other resistant to elevated temperatures insulating material to make; And for the shape of described shell 5, have described container cavity 51 and described fairlead 52 and can be arranged on prerequisite on described current－carrying conductor 2 satisfying, described shell 5 can have various shape, in the present embodiment, described shell 5 has two lugs 54 that are oppositely arranged, described through hole 53 is arranged on described lug 54, and the lug 54 that is oppositely arranged can guarantee to have better fixed effect.In the present embodiment, described securing member 6 is trip bolts.
In order to make the Hall electric current detecting apparatus that the utility model provides have better temperature drifting performance when being applied to checking of great current, the bottom of described shell 5 arranges heat insulating mattress 7, have mounting hole on described heat insulating mattress 7, described securing member 6 passes described mounting hole and is fixed on described current－carrying conductor 2.
In order to intercept the interference of surrounding magnetic field, the Hall electric current detecting apparatus that the present embodiment provides comprises that radome 8(sees Fig. 6, Fig. 7), described radome 8 is socketed on described current－carrying conductor 2 and covers in the axial top of described Hall element 1, and described radome 8 is made for ferromagnetic material.When this kind set-up mode was used for three-phase current detection at the Hall electric current detecting apparatus that the present embodiment is provided, its shield effectiveness was especially obvious.for example, at relay, often need to detect simultaneously three-phase current in motor protector and control and protective switching device (CPS), when using three band Hall elements (at this, Hall element is by shell, be arranged on the Hall element on shell, the output lead that is connected with Hall element and stretches out from shell and the circuit board that is connected with Hall element form) current－carrying conductor 2 when carrying three-phase current, radome 8 has played the effect of the phase mutual interference in the magnetic field that intercepts adjacent current－carrying conductor 2 generations, the precision that has guaranteed to detect is to complete effective defencive function.
Obviously, above-described embodiment is only for example clearly is described, and is not the restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all embodiments exhaustive.And the apparent variation of being extended out thus or change still are among protection domain of the present utility model.
Claims (8)
1. Hall electric current detecting apparatus is characterized in that: comprise current－carrying conductor (2), rotatablely be arranged on Hall element (1), the circuit board (3) that is connected with described Hall element (1) on described current－carrying conductor (2) and be connected to output lead (4) on described circuit board (3).
2. Hall electric current detecting apparatus according to claim 1, it is characterized in that: also comprise the shell (5) that is arranged on described current－carrying conductor (2), described shell (5) has container cavity (51) and fairlead (52), described container cavity (51) is used for holding described Hall element (1) and described circuit board (3), described fairlead (52) is used for described output lead (4) is guided in the described container cavity (51) outside of described shell (5), and described shell (5) can produce upper-lower position with described Hall element (1) and relatively move.
3. Hall electric current detecting apparatus according to claim 2 is characterized in that: described shell (5) is fixing by securing member (6) and described current－carrying conductor (2).
4. the described Hall electric current detecting apparatus of any one according to claim 1-3, it is characterized in that: the bottom of described Hall element (1) arranges heat insulating mattress (7), described heat insulating mattress has mounting hole on (7), and described securing member (6) passes described mounting hole described heat insulating mattress (7) is fixed on described current－carrying conductor (2).
5. Hall electric current detecting apparatus according to claim 4, it is characterized in that: also comprise radome (8), described radome (8) is socketed in the top that described Hall element (1) was gone up and covered in to described current－carrying conductor (2).
6. Hall electric current detecting apparatus according to claim 5, it is characterized in that: described radome (8) is made for ferromagnetic material.
7. Hall electric current detecting apparatus according to claim 6, it is characterized in that: described shell (5) is plastic casing.
8. Hall electric current detecting apparatus according to claim 7 is characterized in that: described Hall element (1) is welded and fixed with described circuit board (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220697442 CN202939211U (en) | 2012-12-17 | 2012-12-17 | Hall current detection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220697442 CN202939211U (en) | 2012-12-17 | 2012-12-17 | Hall current detection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202939211U true CN202939211U (en) | 2013-05-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220697442 Expired - Lifetime CN202939211U (en) | 2012-12-17 | 2012-12-17 | Hall current detection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202939211U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998517A (en) * | 2012-12-17 | 2013-03-27 | 浙江中凯科技股份有限公司 | Hall current detection device |
| CN109696626A (en) * | 2019-03-06 | 2019-04-30 | 山东省产品质量检验研究院 | A kind of actuating range experiment test device of control and protective switching device and application |
-
2012
- 2012-12-17 CN CN 201220697442 patent/CN202939211U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998517A (en) * | 2012-12-17 | 2013-03-27 | 浙江中凯科技股份有限公司 | Hall current detection device |
| CN102998517B (en) * | 2012-12-17 | 2015-06-24 | 浙江中凯科技股份有限公司 | Hall current detection device |
| CN109696626A (en) * | 2019-03-06 | 2019-04-30 | 山东省产品质量检验研究院 | A kind of actuating range experiment test device of control and protective switching device and application |
| CN109696626B (en) * | 2019-03-06 | 2024-02-27 | 山东省产品质量检验研究院 | Action range test device for control and protection switch electric appliance and application |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130515 |