CN222994554U - A multifunctional mutual inductor - Google Patents
A multifunctional mutual inductor Download PDFInfo
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- CN222994554U CN222994554U CN202421843542.0U CN202421843542U CN222994554U CN 222994554 U CN222994554 U CN 222994554U CN 202421843542 U CN202421843542 U CN 202421843542U CN 222994554 U CN222994554 U CN 222994554U
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Abstract
本实用新型公开了一种多功能互感器，包括用于检测漏电流的漏电流互感组件以及用于检测电压、电流的电压互感组件和电流互感组件，漏电流互感组件包括第一护套和漏电流检测线圈，电压互感组件包括第二护套和电压检测线圈，电流互感组件包括第三护套和电流检测线圈，电压互感组件和电流互感组件呈上、下设置，并共同形成一容纳腔，漏电流互感组件设置在容纳腔的开口侧，漏电流互感组件和电流互感组件之间设置有导电的导电针，导电针连接电压检测线圈的检测端，并穿设于第一护套和第三护套，不仅能检测漏电流，还能兼顾检测主电路的电压和电流，以保证使用安全，同时整体结构紧凑且合理、占用体积小。
The utility model discloses a multifunctional mutual inductor, comprising a leakage current mutual inductance component for detecting leakage current, and a voltage mutual inductance component and a current mutual inductance component for detecting voltage and current. The leakage current mutual inductance component comprises a first sheath and a leakage current detection coil, the voltage mutual inductance component comprises a second sheath and a voltage detection coil, the current mutual inductance component comprises a third sheath and a current detection coil, the voltage mutual inductance component and the current mutual inductance component are arranged in an upper and lower manner, and together form an accommodating cavity, the leakage current mutual inductance component is arranged at the opening side of the accommodating cavity, a conductive conductive needle is arranged between the leakage current mutual inductance component and the current mutual inductance component, the conductive needle is connected to the detection end of the voltage detection coil, and is penetrated through the first sheath and the third sheath, so that not only the leakage current can be detected, but also the voltage and current of the main circuit can be detected to ensure safe use, and at the same time the overall structure is compact and reasonable, and the occupied volume is small.
Description
Technical Field
The utility model relates to the technical field of transformers, in particular to a multifunctional transformer.
Background
Along with the rapid development of electric vehicles, the requirements of charging piles are rapidly increased, and the charging piles are generally installed in public building areas (such as charging stations, malls and public parking lots), but current transformers for the charging piles lack detection of residual current or leakage current, such as incapability of detecting and protecting smooth direct current above 6mA, so that certain potential safety risks exist in daily use of the charging piles.
In addition, the function of the existing transformer is single, if leakage current can only be detected, or voltage and current of a main circuit can only be detected, if 3 transformers with different functions are required to be installed in a charging pile, the occupied volume is large, and the installation is inconvenient.
Disclosure of utility model
Therefore, the utility model aims to solve the problems, and provides the multifunctional transformer which not only can detect leakage current, but also can detect the voltage and the current of the main circuit so as to ensure the use safety, and has compact and reasonable whole structure and small occupied volume.
In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:
The utility model provides a multifunctional transformer which comprises a leakage current mutual inductance component, a voltage mutual inductance component and a current mutual inductance component, wherein the leakage current mutual inductance component is used for detecting leakage current, the voltage mutual inductance component is used for detecting voltage and is used for detecting current, the leakage current mutual inductance component comprises an insulated first sheath and a leakage current detection coil assembled in the first sheath, the voltage mutual inductance component comprises an insulated second sheath and a voltage detection coil assembled in the second sheath, the current mutual inductance component comprises an insulated third sheath and a current detection coil assembled in the third sheath, the voltage mutual inductance component and the current mutual inductance component are arranged up and down and jointly form a containing cavity between the voltage mutual inductance component and the current mutual inductance component, the leakage current mutual inductance component is arranged on the opening side of the containing cavity, and a conductive needle which is used for being externally connected with a detection circuit and is arranged between the leakage current mutual inductance component and the current mutual inductance component, is connected with a detection end of the voltage detection coil and penetrates through the first sheath and the third sheath.
Further, an insulating first framework is arranged between the leakage current mutual inductance component and the current mutual inductance component, the first framework is provided with a protruding portion protruding towards the accommodating cavity, the protruding portion penetrates through the first sheath and is inserted into the accommodating cavity, the outer peripheral surface of the protruding portion is provided with mounting grooves matched with the conductive pins to be fixed, and the mounting grooves are arranged at intervals, so that the conductive pins limited in the mounting grooves are insulated from each other.
Further, a second framework is arranged between the second sheath and the third sheath, one side of the second framework is fixed with the second sheath, the other side of the second framework is fixed with the third sheath, and an accommodating cavity which faces to the opening of the current transformer assembly is arranged in the second framework.
Further, the number of the voltage transformer assemblies and the current transformer assemblies is 3, the number of the conductive pins is 4, second jackets of the 3 voltage transformer assemblies are all fixed on the second framework, third jackets of the two current transformer assemblies are fixed on a circuit board, the third jackets of the third current transformer assemblies are arranged on one side of the second framework in the longitudinal direction, and the leading-out ends of the 4 conductive pins penetrate through the circuit board.
Further, the conductive pin, the leakage current mutual inductance component, the voltage mutual inductance component, the current mutual inductance component, the first framework, the second framework and the circuit board are all assembled in a shell, and the leading-out end of the conductive pin sequentially penetrates through the circuit board and the shell.
Further, the shell comprises a bottom shell and an upper cover, and the upper cover is covered on the bottom shell.
Furthermore, two leading-out ends of the conductive needle extend towards one side of the voltage transformer assembly or one side of the current transformer assembly.
Furthermore, the conductive needle is provided with two vertical parts arranged at intervals and a connecting part connected between the two vertical parts, the connecting parts are respectively arranged at an included angle with the two vertical parts, and the end part of the vertical part, which is away from the connecting part, is the leading-out end of the conductive needle.
Further, the conductive needle is a U-shaped needle.
The technical scheme provided by the utility model has the following beneficial effects:
Through will the voltage transformer subassembly with the current transformer subassembly is upper and lower setting, will the current transformer subassembly sets up being located the voltage transformer subassembly with the opening one side of holding the chamber between the current transformer subassembly and every detection coil has the sheath that corresponds with it respectively and carries out insulation protection to form compact and reasonable overall arrangement structure, with realizing holistic occupation small, be convenient for install, also separate respectively high, low pressure, and then realize the safe and stable operation and the use of mutual-inductor, can also detect leakage current, compromise simultaneously and detect the voltage and the electric current of main circuit.
Drawings
Fig. 1 is a first view angle structural diagram of a multifunctional transformer without an upper cover in an embodiment;
Fig. 2 is a view showing a second view angle structure of the multifunctional transformer without the upper cover in the embodiment;
Fig. 3 is a cross-sectional view showing the multifunctional transformer equipped with the upper cover in the embodiment;
FIG. 4 is a schematic view of a first skeleton in an embodiment;
FIG. 5 is a schematic view of a second skeleton in an embodiment;
FIG. 6 is a schematic view of a first jacket according to an embodiment;
FIG. 7 is an external view of another view of the first sheath according to the embodiment;
FIG. 8 is a schematic view of a second jacket according to an embodiment;
FIG. 9 is a schematic view of a third jacket in an embodiment;
FIG. 10 is a schematic view of a conductive pin according to an embodiment;
Fig. 11 is a diagram showing a detection circuit of the multifunctional transformer in the embodiment.
Detailed Description
For further illustration of the various embodiments, the utility model is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present utility model. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.
The utility model will now be further described with reference to the drawings and detailed description.
Referring to fig. 1 to 5, the present embodiment provides a multifunctional transformer (hereinafter simply referred to as a transformer) for detecting leakage current of a charging pile and voltage and current of a charging circuit, the transformer includes a leakage current transformer assembly 1 for detecting leakage current, a voltage transformer assembly 2 for detecting voltage and a current transformer assembly 3 for detecting current as shown in fig. 1, the leakage current transformer assembly 1 includes a first sheath 11 as shown in fig. 6 and 7 and a leakage current detection coil assembled in the first sheath 11, the voltage transformer assembly 2 includes a second sheath 21 as shown in fig. 8 and a voltage detection coil assembled in the second sheath 21, the current transformer assembly 3 includes a third sheath 31 as shown in fig. 9 and a current detection coil assembled in the third sheath 31, so as to realize the partization of each transformer assembly such as the leakage current transformer assembly 1, the current transformer assembly 3 and the leakage current transformer assembly 1, thereby ensuring more convenient production process.
The voltage transformer assembly 2 and the current transformer assembly 3 are arranged up and down, and form a containing cavity 61 between the voltage transformer assembly 2 and the current transformer assembly 3 together, the leakage current transformer assembly 1 is arranged on an opening side 611 of the containing cavity 61, a conductive needle 4 used for externally connecting a detection circuit and conducting electricity is arranged between the leakage current transformer assembly 1 and the current transformer assembly 3, the specific conductive needle 4 is a U-shaped needle, the conductive needle 4 is connected with a detection end of a voltage detection coil, penetrates through the first sheath 11 and the third sheath 31, and forms a detection circuit diagram of the transformer shown in fig. 11.
In this embodiment, an insulating first skeleton 5 as shown in fig. 4 is disposed between the leakage current transformer 1 and the current transformer 3, the first skeleton 5 has a protruding portion 51 protruding toward the accommodating cavity 61, the protruding portion 51 penetrates through the first sheath 11 and is inserted into the accommodating cavity 61, and the outer circumferential surface of the protruding portion 51 has 4 mounting grooves 511,4 for fixing the conductive pins 4, and the mounting grooves 511 are spaced apart from each other, so that the conductive pins 4 limited to be in the corresponding mounting grooves 511 are insulated from each other, so as to realize insulation between the respective conductive pins 4.
A second framework 6 as shown in fig. 5 is arranged between the second sheath 21 and the third sheath 31, the second sheath 21 is fixed on the upper side of the second framework 6, the third sheath 31 is fixed on the lower side of the second framework 6, and a containing cavity 61 which is open towards the current transformer component 3 is arranged in the second framework 6.
And more specifically, the number of the voltage transformer assemblies 2 and the current transformer assemblies 3 is 3, the number of the conductive pins 4 is 4, 3 conductive pins 4 correspond to three-phase power A, B and C, fourth conductive pins 4 correspond to zero line N, the three-phase power A, B and C are matched with the zero line N to form 3 detection circuits or main circuits, 3 voltage transformer assemblies 2 are in one-to-one correspondence with 3 detection circuits, 3 current transformer assemblies 3 are also in one-to-one correspondence with 3 detection circuits, and meanwhile, one leakage current transformer assembly 1 is used for detecting leakage current of a charging pile.
And the second sheaths 21 of the 3 voltage transformer assemblies 2 are all fixed on the second framework 6, wherein the third sheaths 31 of the two current transformer assemblies 3 are fixed on a circuit board 8, the third sheaths 31 of the third current transformer assemblies 3 are arranged on the right side of the second framework 6 in the rectangular direction, and the leading-out ends of the 4 conductive pins 4 are penetrated through the circuit board 8.
Through presenting voltage transformer subassembly 2 and current transformer subassembly 3 upper and lower setting, with the setting of leakage current transformer subassembly 1 at the open side 611 that is located the holding chamber 61 between voltage transformer subassembly 2 and the current transformer subassembly 3 and every detection coil have respectively the sheath that corresponds with it and carry out insulation protection to form compact and reasonable overall arrangement structure, with realizing holistic occupation small, be convenient for install, also separate respectively high, low pressure, and then realize the safe and stable operation and the use of mutual-inductor, can also detect leakage current, compromise simultaneously and detect the voltage and the electric current of main circuit.
In another preferred embodiment, as shown in fig. 1, 2 and 3, both outlets of the 4 conductive pins 4 protrude towards the underside of the voltage transformer assembly 2. Of course, all the outlets may extend toward the current transformer assembly 3. The setting can concentrate the leading-out end of the conductive needle 4 of the mutual inductor on the same side so as to ensure that a user is more convenient when using the mutual inductor.
More specifically, as shown in fig. 10, the conductive needle 4 has two vertical portions 41 disposed at intervals and a connecting portion 42 connected between the two vertical portions 41, where the included angle between the connecting portion 42 and the two vertical portions 41 is 90 degrees, or may be an included angle between 0 and 90 degrees, the end of the vertical portion 41, which deviates from the connecting portion 42, is the leading-out end of the conductive needle 4, and the connecting portion 42 is U-shaped, so that the conductive needle 4 can conveniently pass through the central holes of the first framework 5, the second framework 6, the first sheath 11 and the third sheath 31, and the overall volume can be further ensured to be smaller.
In this embodiment, the 4 conductive pins 4, the 1 leakage current transformer 1, the 3 voltage transformer 2, the 3 current transformer 3, the 1 first frame 5, the 1 second frame 6 and the 1 circuit board 8 are all assembled in a housing 7, and the lead-out ends of all the conductive pins 4 sequentially penetrate through the circuit board 8 and the housing 7, and the specific housing 7 includes a bottom shell 71 and an upper cover 72, and the upper cover 72 covers the bottom shell 71.
The transformer also comprises a wiring terminal 9, wherein the wiring terminal 9 is arranged at the leftmost side so as to facilitate external connection of a circuit.
When the transformer of this embodiment needs to be installed, 3 kinds of wound coils are first assembled in the corresponding sheaths, that is, the leakage current detection coil adopts HP 25.7x22.6x3.2n model coils and is assembled in the first sheath 11, the voltage detection coil adopts HP1303N model coils and is assembled in the second sheath 21, the current detection coil adopts HP17 x 10.5x5.2s model coils and is assembled in the third sheath 31, and then each is fixed together by potting adhesive.
Then, the second sheaths 21 of the two current transformer assemblies 3 are welded on the circuit board 8, and the 4 conductive pins 4 penetrate through the central holes of the first sheaths 11 and are fixed through the first frameworks 5, in addition, the conductive pins 4 connected with A, B phase circuits penetrate through the central holes of the second sheaths 21 of the two current transformer assemblies 3 welded on the circuit board 8 one by one, the second sheaths 21 of the third current transformer assemblies 3 positioned on the right side of the second frameworks 6 penetrate through the third conductive pins 4 connected with C phase circuits, and the fourth conductive pins 4 connected with zero lines N penetrate through the circuit board 8 directly, and the central holes of the second sheaths 21 and the third sheaths 31 are not needed.
After the leading-out ends of all the conductive pins 4 pass through the circuit board 8, all the conductive pins 4 are fixed on the circuit board 8 by welding.
Then, 3 voltage transformer modules 2 are mounted on top of the second chassis 6, then the second chassis 6 with the voltage transformer modules 2 mounted thereon is placed on top of two second sheaths 21 welded on the circuit board 8, then the connection terminals 9 with 3 Pin pins are also welded on the left side of the circuit board 8, then the circuit board 8 is mounted on the bottom chassis 71, and finally the upper cover 72 is covered, so that the mounting of the whole transformer is completed.
While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (9)
1. The multifunctional transformer is characterized by comprising a leakage current mutual inductance component for detecting leakage current, a voltage mutual inductance component for detecting voltage and a current mutual inductance component for detecting current;
The voltage transformer comprises an insulating second sheath and a voltage detection coil assembled in the second sheath, wherein the current transformer comprises an insulating third sheath and a current detection coil assembled in the third sheath;
the voltage mutual inductance component and the current mutual inductance component are arranged up and down and form a containing cavity between the voltage mutual inductance component and the current mutual inductance component together;
The leakage current mutual inductance component and the current mutual inductance component are provided with conductive pins which are used for being externally connected with a detection circuit and conductive, and the conductive pins are connected with the detection end of the voltage detection coil and penetrate through the first sheath and the third sheath.
2. The multifunctional transformer according to claim 1, wherein an insulating first framework is arranged between the leakage current transformer component and the current transformer component, the first framework is provided with a protruding part protruding towards the accommodating cavity, the protruding part penetrates through the first sheath and is inserted into the accommodating cavity, the outer peripheral surface of the protruding part is provided with mounting grooves matched with the conductive pins to be fixed, and the mounting grooves are arranged at intervals so as to insulate the conductive pins limited in the mounting grooves from each other.
3. The multifunctional transformer of claim 2, wherein a second framework is arranged between the second sheath and the third sheath, one side of the second framework is fixed with the second sheath, the other side of the second framework is fixed with the third sheath, and a containing cavity which is open towards the current transformer component is arranged in the second framework.
4. The multifunctional transformer of claim 3, wherein the number of the voltage transformer components and the number of the current transformer components are 3, the number of the conductive pins is 4, the second jackets of the 3 voltage transformer components are all fixed on the second framework, the third jackets of the two current transformer components are fixed on a circuit board, the third jackets of the third current transformer components are arranged on one side of the second framework in the longitudinal direction, and the leading-out ends of the 4 conductive pins penetrate through the circuit board.
5. The multi-functional transformer of claim 4, wherein the conductive pin, the leakage current transformer assembly, the voltage transformer assembly, the current transformer assembly, the first chassis, the second chassis and the circuit board are all assembled in a housing, and the lead-out end of the conductive pin sequentially passes through the circuit board and the housing.
6. The multi-function transformer according to claim 5, wherein the housing comprises a bottom shell and an upper cover, and the upper cover is covered on the bottom shell.
7. The multifunctional transformer according to any one of claims 1 to 6, wherein both the outgoing ends of the conductive pin protrude toward one side of the voltage transformer assembly or the current transformer assembly.
8. The multifunctional transformer of claim 7, wherein the conductive pin is provided with two vertical parts arranged at intervals and a connecting part connected between the two vertical parts, the connecting parts are respectively arranged at an included angle with the two vertical parts, and the end part of the vertical part, which is away from the connecting part, is the leading-out end of the conductive pin.
9. The multi-function transformer of claim 7, wherein the conductive pin is a U-shaped pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421843542.0U CN222994554U (en) | 2024-08-01 | 2024-08-01 | A multifunctional mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421843542.0U CN222994554U (en) | 2024-08-01 | 2024-08-01 | A multifunctional mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222994554U true CN222994554U (en) | 2025-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421843542.0U Active CN222994554U (en) | 2024-08-01 | 2024-08-01 | A multifunctional mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222994554U (en) |
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2024
- 2024-08-01 CN CN202421843542.0U patent/CN222994554U/en active Active
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