CN221007710U - Mutual inductor and current detection device - Google Patents
Mutual inductor and current detection device Download PDFInfo
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- CN221007710U CN221007710U CN202323003166.2U CN202323003166U CN221007710U CN 221007710 U CN221007710 U CN 221007710U CN 202323003166 U CN202323003166 U CN 202323003166U CN 221007710 U CN221007710 U CN 221007710U
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Abstract
The application provides a transformer and a current detection device, wherein the transformer comprises a first current induction component, a second current induction component, a live wire and a zero wire; the second current sensing components are arranged at intervals along the first direction on one side of the first current sensing components, which is close to the circuit board; the first current flows through the live wire, a first part of the live wire is arranged on one side of the first current sensing component along a first direction, and a second part of the live wire is arranged on one side of the second current sensing component along the first direction; the second current flows through the zero line, and the third part of the zero line is arranged at one side of the second current induction component along the first direction; the first current sensing component is used for outputting a first sensing current according to the first current; the second current sensing component is used for outputting a second sensing current according to the first current and the second current; the over-line current and the residual current are detected through the same transformer, so that the volume occupation of the circuit board on the installation space is reduced, and the installation difficulty is reduced.
Description
Technical Field
The application belongs to the technical field of current transformers, and particularly relates to a transformer and a current detection device.
Background
In most electronic devices, it is often necessary to provide a current detection device for detecting a current in the current. Specifically, it is mainly necessary to detect an overcurrent and a residual current (leakage current).
In the related art, an over-line current transformer and a residual current transformer are respectively arranged in a current detection device, the over-line current in a circuit is detected by adopting the over-line current transformer, and the residual current in the circuit is detected by adopting the residual current transformer. However, the over-line current transformer and the residual current transformer occupy more installation space on the circuit board and increase the installation difficulty.
Therefore, how to reduce the space occupation and the installation difficulty of the current detection device is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The application aims to provide a transformer and a current detection device, and aims to solve the problems that the transformer in the prior art occupies a larger space and is difficult to install.
A first aspect of an embodiment of the present application proposes a transformer for mounting on a circuit board, comprising:
A first current sensing component;
The second current sensing assemblies are arranged at intervals along the first direction on one side, close to the circuit board, of the first current sensing assemblies;
The live wire is provided with a first part and a second part, the first part is arranged on one side of the first current induction component along the first direction, and the second part is arranged on one side of the second current induction component along the first direction;
A zero line through which a second current flows, the zero line having a third portion disposed on one side of the second current sensing assembly along the first direction;
The first current induction component is used for inducing the first current and outputting a first induction current according to the first current, and the first induction current is used for indicating the line current; the second current sensing component is used for sensing the first current and the second current and outputting a second sensing current according to the first current and the second current, and the second sensing current is used for representing residual current.
In some embodiments of the present application, the first current sensing assembly includes a first magnet and a first coil, the first magnet extending in a second direction in a first plane, the first plane being perpendicular to the first direction; the first coil is wound on the first magnet and extends along the second direction;
And/or the second current sensing assembly comprises a second magnet and a second coil, the second magnet extending along a third direction in a second plane, the second plane being perpendicular to the first direction; the second coil is wound on the second magnet and extends along the third direction.
In some embodiments of the present application, the first magnet is in a ring structure, and the second direction is a loop line direction of the first magnet; wherein the first part is arranged in the first magnetic body in a penetrating way;
And/or the second magnet is of an annular structure, and the third direction is the annular line direction of the second magnet; the second part and the third part are arranged in the second magnet in a penetrating way.
In some embodiments of the present disclosure, the transformer includes a fixed post, the fixed post is disposed through the first magnet and/or the second magnet, and the first portion and/or the second portion and/or the third portion are disposed through the fixed post.
In some embodiments of the present application, a baffle plate is disposed at an end of the fixing post near the circuit board, and the baffle plate extends along the first direction to abut against the circuit board; wherein said barrier is arranged between at least part of said live wire and at least part of said neutral wire to block said live wire and said neutral wire.
In some embodiments of the application, the barrier plate is an insulator and/or an electromagnetic shield.
In some embodiments of the present application, the transformer includes a main housing having a first cavity disposed therein along a first direction, the first current sensing assembly and the second current sensing assembly being disposed within the first cavity.
In some embodiments of the present application, a plurality of through holes are disposed in a wall of the main housing along a first direction, and the first portion, the second portion, and the third portion are disposed through the through holes.
In some embodiments of the application, the main housing includes a first housing and a second housing, the first housing and the second housing being detachably connected along the first direction.
In a second aspect, the application further provides a current detection device, which comprises the transformer.
Compared with the prior art, the embodiment of the application has the beneficial effects that: the transformer and the current detection device are arranged on the circuit board, and the transformer comprises a first current induction component, a second current induction component, a live wire and a zero wire; the second current sensing components are arranged at intervals along the first direction on one side of the first current sensing components, which is close to the circuit board; the live wire is provided with a first part and a second part, the first part is arranged on one side of the first current induction component along the first direction, and the second part is arranged on one side of the second current induction component along the first direction; the zero line is provided with a third part, and the third part is arranged on one side of the second current induction component along the first direction; the first current sensing component is used for sensing a first current and outputting the first sensed current according to the first current; the second current induction component is used for inducing a first current and a second current and outputting a second induction current according to the first current and the second current; that is, the application can detect the over-line current and the residual current through the same transformer, on one hand, the application is beneficial to reducing the volume occupation on the installation space of the circuit board, and on the other hand, only one transformer is needed to be installed, thereby being beneficial to reducing the installation difficulty.
Drawings
Fig. 1 is a schematic structural diagram of a transformer according to an embodiment of the present application;
Fig. 2 is a schematic structural diagram of a transformer according to another embodiment of the present application;
FIG. 3 is a schematic diagram of the structure of FIG. 2 at another view angle according to an embodiment of the present application;
FIG. 4 is a schematic view of the cross-sectional view of the A-A direction of FIG. 3 according to an embodiment of the present application.
Specific element symbol description: 100-first current sensing assembly, 110-first magnet, 120-first coil, 200-second current sensing assembly, 210-first magnet, 220-second coil, 300-hot wire, 310-first part, 320-second part, 400-neutral, 410-third part, 500-main housing, 510-first housing, 520-second housing, 530-through hole, 600-fixed column, 700-barrier, a-first direction, b-second direction, c-third direction.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It is to be understood that the terms "length," "width," "upper," "lower," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, and are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In most electronic devices, a current detection device is often required to detect a current in a current. Specifically, it is mainly necessary to detect an overcurrent and a residual current (leakage current). It should be noted that, the over-line current generally refers to a current input to the load, and the over-line current affects whether the load can operate normally. The residual current generally refers to the current vector sum of each phase in the low-voltage distribution line, and is not zero, so that the residual current can cause error electric shock, and the safety of personnel is affected. Therefore, after the over-line current and the residual current are detected simultaneously, the working stability and the safety performance of the electronic equipment are improved.
In the related art, an over-line current transformer and a residual current transformer are respectively arranged in a current detection device, the over-line current in a circuit is detected by adopting the over-line current transformer, and the residual current in the circuit is detected by adopting the residual current transformer. However, the over-line current transformer and the residual current transformer occupy more installation space on the circuit board and increase the installation difficulty. It can be appreciated that the two transformers are respectively mounted on the circuit board, and occupy the mounting space of the two transformers. And the difficulty in the process of installing the two transformers is also relatively high, so that the processing time is prolonged.
The application is therefore based on the improvement of the related transformer and current detection device.
Referring to fig. 1 in combination, fig. 1 shows a schematic structural diagram of a transformer according to the present embodiment. A transformer of the present embodiment is for mounting on a circuit board and includes a first current sensing assembly 100, a second current sensing assembly 200, a hot wire 300, and a neutral wire 400. It should be noted that the first current sensing device 100 and the second current sensing device 200 can sense and detect current. In one possible embodiment, the first current sensing component 100 and the second current sensing component 200 comprise inductive structures. The hot wire 300 may be understood as the wire connected to the positive pole of the power supply to the load, and the neutral wire 400 may be understood as the wire connected to the negative pole of the power supply.
The second current sensing components 200 are arranged at intervals along the first direction a on one side of the first current sensing component 100 close to the circuit board; that is, the first current sensing element 100 and the second current sensing element 200 are disposed at intervals along the first direction a, and the second current sensing element 200 is disposed closer to the circuit board than the first current sensing element 100.
A first current flows through the hot wire 300. The first current may be understood as an over-line current. The fire wire 300 has a first portion 310 and a second portion 320, the first portion 310 being arranged on one side of the first current sensing assembly 100 along a first direction a, and the second portion 320 being arranged on one side of the second current sensing assembly 200 along the first direction a. That is, a portion of the hot wire 300 (first portion 310) is disposed proximate the first current sensing assembly 100 such that the first current sensing assembly 100 is capable of sensing a first current on the hot wire 300. Another portion (second portion 320) of the hot wire 300 is positioned adjacent to the second current sensing assembly 200 to enable the second current sensing assembly 200 to sense a first current on the hot wire 300.
A second current flows through the neutral line 400. The neutral line 400 has a third portion 410, the third portion 410 being disposed on one side of the second current sensing assembly 200 along the first direction a. That is, a portion (third portion 410) of the neutral wire 400 is disposed near the second current-sensing device 200 to enable the second current-sensing device 200 to sense the second current on the neutral wire 400, thereby calculating the residual current from the sensed first current and second current.
Specifically, the first current sensing component 100 is configured to sense a first current, and output the first sensed current according to the first current, where the first sensed current is used to characterize the line current. That is, the overcurrent may be detected by the first current sensing device 100. The second current sensing component 200 is configured to sense a first current and a second current, and output a second sensed current according to the first current and the second current, where the second sensed current is used to characterize the residual current. That is, the residual current may be detected by the second current sensing device 200. And the first current sensing component 100 and the second current sensing component 200 are overlapped in the first direction a, which is beneficial to reducing the space occupation on the circuit board.
The existing over-line current transformer and the residual current transformer are mutually separated, so that the installation space of the circuit board is greatly occupied, and the installation difficulty is high. However, the application can detect the over-line current and the residual current through the same transformer, on one hand, the application is beneficial to reducing the volume occupation on the installation space of the circuit board, and on the other hand, only one transformer is needed to be installed, thereby being beneficial to reducing the installation difficulty.
In some embodiments of the present application, please continue to refer to fig. 1, the first current sensing assembly 100 of the present embodiment includes a first magnet 210110 and a first coil 120, the first magnet 210110 extends along a second direction b in a first plane, and the first plane is perpendicular to the first direction a. The first coil 120 is wound on the first magnet 210110 and extends along the second direction b. It should be explained that a patch type transformer is currently used, but the transformer with such a structure can only detect an overcurrent and cannot detect a residual current. In this embodiment, the coil and magnet structure can be applied to detecting an overcurrent and a residual current, as compared with the patch type structure.
In some embodiments, the first magnet 210110 is an iron core, including, but not limited to, being made from cold rolled silicon steel sheet, permalloy, and iron-based ultracrystalline alloy.
In some embodiments or further embodiments of the present application, with continued reference to fig. 1, the second current sensing assembly 200 of the present embodiment includes a second magnet and a second coil 220, the second magnet extending along a third direction c in a second plane, the second plane being perpendicular to the first direction a; the second coil 220 is wound on the second magnet and extends along the third direction c. It should be explained that a patch type transformer is currently used, but the transformer with such a structure can only detect an overcurrent and cannot detect a residual current. In this embodiment, the coil and magnet structure can be applied to detecting an overcurrent and a residual current, as compared with the patch type structure.
In some embodiments, the second magnet is an iron core, including but not limited to, being made from cold rolled silicon steel sheet, permalloy, and iron-based ultracrystalline alloy.
In some embodiments of the present application, please continue to refer to fig. 1, in this embodiment, the first magnet 210110 has a ring structure, and the second direction b is the circumferential direction of the first magnet 210110. In one exemplary illustration, the first magnet 210110 may be a circular ring structure, a square ring structure, an elliptical ring structure, or the like. Wherein the first portion 310 is disposed through the first magnet 210110. That is, when a current flows through the first portion 310, the first coil 120 on the first magnet 210110 can induce a current on the first portion 310.
In some embodiments or further embodiments of the present application, please continue to refer to fig. 1, the second magnet of the present embodiment has a ring structure, and the third direction c is the ring line direction of the second magnet; in one exemplary illustration, the second magnet may be a circular ring structure, a square ring structure, an elliptical ring structure, or the like. Wherein the second portion 320 and the third portion 410 are disposed through the second magnetic body. That is, when current flows through the first portion 310 and the second portion 320, the second coil 220 on the second magnet can induce current on the second portion 320 and the third portion 410.
In some embodiments of the present application, referring to fig. 2, fig. 2 shows a schematic structural diagram of a transformer provided in this embodiment; the transformer of the present embodiment includes a fixing post 600, where the fixing post 600 is penetrated into the first magnet 210110 and/or the second magnet, and the first portion 310 and/or the second portion 320 and/or the third portion 410 are penetrated into the fixing post 600. That is, the fixing post 600 can maintain the stability of the first portion 310 and/or the second portion 320 and/or the third portion 410, which is further beneficial to improving the detection accuracy of the first current sensing assembly 100 and the second current sensing assembly 200.
In some embodiments of the present application, please continue to refer to fig. 2 and fig. 3 and 4, fig. 3 shows a schematic structural diagram of the transformer provided in this embodiment, and fig. 4 shows a schematic A-A cross-sectional structural diagram of fig. 3 provided in this embodiment. The end of the fixing column 600 close to the circuit board is provided with a baffle plate 700, and the baffle plate 700 extends along the first direction a to be abutted against the circuit board; wherein a barrier 700 is provided between at least part of the live wire 300 and at least part of the neutral wire 400 to block the live wire 300 and the neutral wire 400. It should be noted that the barrier 700 can avoid shorting the live wire 300 and the neutral wire 400, thereby reducing the risk of sparks and fire.
In some embodiments of the present application, barrier plate 700 of the present embodiment is an insulator and/or an electromagnetic shield. It should be noted that when the barrier 700 is an insulating member, the live wire 300 and the neutral wire 400 can be prevented from being electrically connected through the barrier 700, and thus, sparks caused by shorting of the live wire 300 and the neutral wire 400 can be advantageously prevented. In some embodiments, an insulating coating can be applied to barrier plate 700 to provide insulation, and in another embodiment barrier plate 700 can be formed of an insulating material to provide insulation.
Because the distance between the live wire 300 and the neutral wire 400 is relatively close, the magnetic fields between the live wire 300 and the neutral wire 400 interfere with each other, and thus interfere with the detection accuracy of the first current sensing assembly 100 and the second current sensing assembly 200. In this embodiment, the blocking plate 700 is an electromagnetic shielding member, so that the mutual interference of the magnetic fields between the live wire 300 and the neutral wire 400 can be avoided, and the interference to the first current sensing assembly 100 and the second current sensing assembly 200 is reduced. In some embodiments, an electromagnetic shielding layer can be provided on barrier plate 700 to act as an electromagnetic shield. Or it can be provided that the barrier plate 700 is made of an electromagnetic shielding material.
In one possible example, barrier 700 has an insulating effect and an electromagnetic shielding effect. Specifically, the barrier plate 700 is provided to be made of an electromagnetic shielding material, and the surface of the barrier plate 700 is provided with an insulating layer.
In some embodiments of the present application, please continue to refer to fig. 2, the transformer in this embodiment includes a main housing 500, a first cavity is disposed in the main housing 500 along a first direction a, and the first current sensing component 100 and the second current sensing component 200 are disposed in the first cavity. In some embodiments, the first magnet 210110 and the second magnet are disposed parallel to each other.
In some embodiments of the present application, please continue to refer to fig. 2, a plurality of through holes 530 are disposed along the first direction a in the wall of the main housing 500 of the present embodiment, and the first portion 310, the second portion 320 and the third portion 410 are disposed through the through holes 530. That is, the first portion 310, the second portion 320 and the third portion 410 can be inserted into the through hole 530 of the main housing 500 in advance, so as to reduce the difficulty of installation in the installation process.
In some embodiments of the present application, please continue to refer to fig. 2, the main housing 500 of the present embodiment includes a first housing 510 and a second housing 520, where the first housing 510 and the second housing 520 are detachably connected along a first direction a.
Further, in order to better implement the mutual inductor of any embodiment, the application further provides a current detection device based on the mutual inductor of any embodiment, which comprises the mutual inductor of any embodiment.
It should be noted that, the current detection device in this embodiment can pass the static test of ±20kv, and is suitable for the field with high static protection requirement.
The current detection device of the embodiment can be applied to fire-fighting equipment and is used for electrical current limiting protection.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
While the basic concepts have been described above, it will be apparent to those skilled in the art that the foregoing detailed disclosure is by way of example only and is not intended to be limiting. Although not explicitly described herein, various modifications, improvements and adaptations of the application may occur to one skilled in the art. Such modifications, improvements, and modifications are intended to be suggested within the present disclosure, and therefore, such modifications, improvements, and adaptations are intended to be within the spirit and scope of the exemplary embodiments of the present disclosure.
Meanwhile, the present application uses specific words to describe embodiments of the present application. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic is associated with at least one embodiment of the application. Thus, it should be emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various positions in this specification are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the application may be combined as suitable.
Similarly, it should be noted that in order to simplify the description of the present disclosure and thereby aid in understanding one or more inventive embodiments, various features are sometimes grouped together in a single embodiment, figure, or description thereof. This method of disclosure does not imply that the subject application requires more features than are set forth in the claims. Indeed, less than all of the features of a single embodiment disclosed above.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (10)
1. A transformer for mounting on a circuit board, comprising:
A first current sensing component;
The second current sensing assemblies are arranged at intervals along the first direction on one side, close to the circuit board, of the first current sensing assemblies;
The live wire is provided with a first part and a second part, the first part is arranged on one side of the first current induction component along the first direction, and the second part is arranged on one side of the second current induction component along the first direction;
A zero line through which a second current flows, the zero line having a third portion disposed on one side of the second current sensing assembly along the first direction;
The first current induction component is used for inducing the first current and outputting a first induction current according to the first current, and the first induction current is used for indicating the line current; the second current sensing component is used for sensing the first current and the second current and outputting a second sensing current according to the first current and the second current, and the second sensing current is used for representing residual current.
2. The transformer of claim 1, wherein the first current sensing assembly comprises a first magnet and a first coil, the first magnet extending in a second direction in a first plane, the first plane being perpendicular to the first direction; the first coil is wound on the first magnet and extends along the second direction;
And/or the second current sensing assembly comprises a second magnet and a second coil, the second magnet extending along a third direction in a second plane, the second plane being perpendicular to the first direction; the second coil is wound on the second magnet and extends along the third direction.
3. The transformer of claim 2, wherein the first magnet is of annular configuration and the second direction is the loop direction of the first magnet; wherein the first part is arranged in the first magnetic body in a penetrating way;
And/or the second magnet is of an annular structure, and the third direction is the annular line direction of the second magnet; the second part and the third part are arranged in the second magnet in a penetrating way.
4. A transformer according to claim 3, comprising a fixed post which passes through the first and/or second magnets, the first and/or second and/or third portions passing through the fixed post.
5. The transformer of claim 4, wherein a baffle plate is disposed at an end of the fixed post adjacent to the circuit board, the baffle plate extending along the first direction to abut the circuit board; wherein said barrier is arranged between at least part of said live wire and at least part of said neutral wire to block said live wire and said neutral wire.
6. The transformer according to claim 5, wherein the barrier plate is an insulator and/or an electromagnetic shield.
7. The transformer of claim 1, wherein the transformer comprises a main housing having a first cavity disposed therein along a first direction, the first current sensing assembly and the second current sensing assembly being disposed within the first cavity.
8. The transformer of claim 7, wherein a plurality of through holes are provided in a wall of the main housing along a first direction, and the first portion, the second portion, and the third portion are disposed through the through holes.
9. The transformer of claim 7, wherein the main housing comprises a first housing and a second housing, the first housing and the second housing being detachably connected along the first direction.
10. A current sensing apparatus comprising a transformer as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323003166.2U CN221007710U (en) | 2023-11-07 | 2023-11-07 | Mutual inductor and current detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323003166.2U CN221007710U (en) | 2023-11-07 | 2023-11-07 | Mutual inductor and current detection device |
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| CN221007710U true CN221007710U (en) | 2024-05-24 |
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| CN202323003166.2U Active CN221007710U (en) | 2023-11-07 | 2023-11-07 | Mutual inductor and current detection device |
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| CN (1) | CN221007710U (en) |
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