CN220491717U - PCB-mounted high-current transformer - Google Patents
PCB-mounted high-current transformer Download PDFInfo
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- CN220491717U CN220491717U CN202322059583.2U CN202322059583U CN220491717U CN 220491717 U CN220491717 U CN 220491717U CN 202322059583 U CN202322059583 U CN 202322059583U CN 220491717 U CN220491717 U CN 220491717U
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- 238000004804 winding Methods 0.000 claims abstract description 78
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000002390 adhesive tape Substances 0.000 claims description 9
- 239000011241 protective layer Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 11
- 238000005259 measurement Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000009413 insulation Methods 0.000 description 6
- 238000002955 isolation Methods 0.000 description 5
- 238000010891 electric arc Methods 0.000 description 4
- 229910000976 Electrical steel Inorganic materials 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- KUBDPQJOLOUJRM-UHFFFAOYSA-N 2-(chloromethyl)oxirane;4-[2-(4-hydroxyphenyl)propan-2-yl]phenol Chemical compound ClCC1CO1.C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 KUBDPQJOLOUJRM-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Transformers For Measuring Instruments (AREA)
Abstract
The utility model discloses a PCB-mounted high-current transformer, which comprises a main body framework and an iron core, wherein the iron core is inserted and surrounded on the main body framework, and a primary winding and a secondary winding are wound on the main body framework; the main body framework is a split-slot framework, the primary winding and the secondary winding are respectively arranged in a separated mode corresponding to the slot bodies of the main body framework, a creepage distance increasing component is arranged between the primary winding and the secondary winding, and creepage distances are increased between the primary winding and the secondary winding through slot walls and intervals of the creepage distance increasing component. According to the utility model, through the combination of the split-slot type framework design and the additionally arranged creepage distance increasing component, the creepage distance between the primary winding and the secondary winding of the transformer can be maximized in a limited space, and the accuracy and the reliability of a measurement signal are improved.
Description
Technical Field
The utility model belongs to the technical field of high-current transformers, and particularly relates to a PCB (printed circuit board) mounting type high-current transformer.
Background
The high-current transformer is a sensor for measuring high current, is widely applied to the fields of power systems, industrial automation, energy management and the like, is used for monitoring and measuring the current, and provides important data for safe operation of the power systems. The high-voltage arc is easy to span from the primary winding to the secondary winding, and the accuracy and the reliability of a measurement signal are affected.
Disclosure of Invention
The utility model aims to: in order to overcome the defects in the prior art, the utility model provides the PCB-mounted high-current transformer, which can maximize the creepage distance between the primary winding and the secondary winding in a limited space by the combination of the design of the split-slot type framework and the addition of the creepage distance increasing component, and improves the accuracy and the reliability of measuring signals.
The technical scheme is as follows: in order to achieve the above purpose, the PCB-mounted high-current transformer comprises a main body framework and an iron core, wherein the iron core is inserted and surrounded on the main body framework, and a primary winding and a secondary winding are wound on the main body framework;
the main body framework is a split-slot framework, the primary winding and the secondary winding are respectively arranged in a separated mode corresponding to the slot bodies of the main body framework, a creepage distance increasing component is arranged between the primary winding and the secondary winding, and creepage distances are increased between the primary winding and the secondary winding through slot walls and intervals of the creepage distance increasing component.
Further, the creepage distance increasing component is a flange adhesive tape arranged on the side face of the secondary winding.
Further, an insulating protective layer is paved on the part of the main body framework, which is surrounded and covered by the iron core, and the coil winding is insulated and isolated from the iron core through the insulating protective layer.
Further, a plurality of mounting holes are formed in the mounting feet of the main body framework to form a multi-hole position mounting foot position structure.
Further, skeleton pins of the main body skeleton are located on the mounting pins, and leading-out ends of the skeleton pins are arranged on the same side as the mounting holes.
Further, the primary winding is of a U-shaped structure, the end part of the primary winding of the U-shaped structure penetrates through a positioning plugboard fixed relative to the main body framework for shaping, and the primary winding is fixed relative to the main body framework through fixed epoxy.
Further, a high-temperature insulating heat-shrinkable sleeve is arranged outside the lead of the primary winding.
Further, the periphery of the iron core is wrapped and bound through the outer wrapping part.
The beneficial effects are that: according to the utility model, through the combination of the split-slot type framework design and the additionally arranged creepage distance increasing component, the creepage distance between the primary winding and the secondary winding of the transformer can be maximized in a limited space, and the accuracy and the reliability of a measurement signal are improved; the skeleton between the primary winding and the secondary winding is used as a physical isolation layer, so that the embedded electric interference and arc discharge phenomena are effectively prevented; the flange adhesive tape has insulation and arc resistance, further increases the creepage distance between the primary winding and the secondary winding, can effectively prevent arc discharge, improves the safety of the transformer in a high-voltage environment, and ensures that the transformer has higher safety isolation characteristic in a hybrid high-voltage state.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a schematic exploded view of the structure of the present utility model;
fig. 3 is a schematic structural diagram of the transformer in a creepage distance state.
Detailed Description
The utility model will be further described with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, a PCB-mounted heavy current transformer comprises a main body framework 1 and an iron core 2, wherein the iron core 2 is inserted and surrounded on the main body framework 1, and a primary winding 3 and a secondary winding 4 are wound on the main body framework 1; the main body framework 1 is a split-slot framework, the primary winding 3 and the secondary winding 4 are respectively arranged in a separated mode corresponding to the slot body 10 of the main body framework 1, a creepage distance increasing component 5 is arranged between the primary winding 3 and the secondary winding 4, and creepage distances are increased through the slot wall 11 and the creepage distance increasing component 5. In the present utility model, the creepage distance increasing member 5 is preferably a flange tape provided on the side of the secondary winding 4. According to the utility model, through the combination of the split-slot type framework design and the additionally arranged creepage distance increasing component 5, the creepage distance between the primary winding and the secondary winding of the transformer can be maximized in a limited space, and the accuracy and the reliability of a measurement signal are improved. The skeleton between the primary winding and the secondary winding is used as a physical isolation layer, so that potential electric interference and arc discharge phenomena are effectively prevented; the flange adhesive tape has insulation and arc resistance, further increases the creepage distance between the primary winding and the secondary winding, can effectively prevent arc discharge, improves the safety of the transformer in a high-voltage environment, and ensures that the transformer has higher safety isolation characteristic in a hybrid high-voltage state.
As shown in fig. 3, the meaning of the position denoted by the symbol a is: the creepage distance between primary and secondary windings is maximized in a compact existing space.
The working principle of the PCB-mounted large-current transformer is based on the law of electromagnetic induction. When a high current is passed through the primary conductor (typically a cable or wire) of the transformer, a small current signal proportional to the input current is generated in the secondary winding, which can be processed and analyzed by a circuit connection to a current measuring device or control system. One of the main features of PCB-mounted high current transformers is its compact design, which is achieved by integrating the transformer onto a Printed Circuit Board (PCB), and thus can be conveniently installed in various devices and systems, which not only saves space, but also improves the reliability and stability of the transformer. Another important feature is the large current measurement range. PCB-mounted high current transformers can handle high currents of tens to hundreds of amperes with high accuracy and sensitivity, they typically have a broadband response and low phase errors to ensure accurate measurement of the current signal. The PCB-mounted high-current transformer also has good linear characteristics and temperature stability, and the output signals of the PCB-mounted high-current transformer have small changes at different temperatures, so that reliable measurement results can be provided. In addition, they have low energy consumption and long service life, and are suitable for various severe working environments. In practical applications, PCB-mounted heavy current transformers are commonly used for current measurement, protection and control of power systems, they can be used for measuring currents of main circuits, branch circuits and various electric devices in substations, power plants and factories, by monitoring changes of the currents, system operators can know the working state of the power systems in real time, and take necessary measures to protect the devices and ensure stable operation of the systems.
The part of the main body framework 1, which is surrounded and covered by the iron core 2, is paved with an insulating protective layer 6, the coil winding is insulated and isolated from the iron core 2 through the insulating protective layer 6, the insulating protective layer 6 is an safety tape, and the insulating isolation strength between the winding and the iron core 2 is increased.
The mounting feet 12 of the main body framework 1 are provided with a plurality of mounting holes 13 to form a multi-hole site mounting foot position structure. The design enables the transformer to be assembled and designed in a combined mode according to different PCB (printed circuit board) installation size requirements, and therefore finished product assembly is more flexible. The multi-hole design provides a plurality of holes at different positions, which can be matched with PCB boards with different sizes. This means that the transformer can accommodate a variety of different PCB layout and size requirements. The manufacturer may choose the appropriate combination of holes to mount the transformer to ensure a good match and compact layout with other electronic components, as desired for the application. In addition, the multi-well site design provides flexibility and adjustability. The manufacturer can flexibly select and combine different hole sites according to the specific requirements of clients so as to meet the requirements of different application scenes. This flexibility enables the transformer to be efficiently installed and integrated under a variety of PCB layout and design constraints.
The skeleton pin 7 of the main body skeleton 1 is positioned on the mounting pin 12, and the leading-out end of the skeleton pin 7 is arranged on the same side as the mounting hole 13.
The primary winding 3 is in a U-shaped structure, the end part of the primary winding 3 in the U-shaped structure penetrates through a positioning plugboard 16 fixed relative to the main body framework 1 for shaping, and the primary winding 3 is fixed relative to the main body framework 1 through fixing epoxy 15 in a solidifying mode. The U-shaped design makes the primary winding form similar to the letter U, and the shape has the characteristics of mechanical stability and easy manufacture, and is suitable for mechanical automatic production. Through automation equipment, a large quantity of U-shaped primary windings can be manufactured efficiently, and production efficiency and product consistency are improved. In order to facilitate the assembly in actual production, the U-shaped primary winding is matched with the positioning plugboard 16, the positioning plugboard 16 can ensure the accurate position and fixed shaping of the primary winding, the assembly process is simpler, more convenient and more reliable, the correct alignment of the primary winding and other components can be ensured through the matching of the positioning plugboard, and the overall assembly quality of the transformer is improved. And according to the difference of actual measurement current value, can support the U-shaped wire of different specifications, this kind of nimble design can satisfy different current measurement demands. By selecting a U-shaped wire of a proper specification, the transformer can be ensured to have lower resistance and higher accuracy in the measuring process.
In order to increase the insulation protection of the wires, the high-temperature insulation heat shrinkage sleeve 8 is arranged outside the wires of the primary winding 3, has excellent insulation performance and high-temperature resistance, can effectively protect the wires from the external environment, and improves the safety and reliability of the transformer.
The periphery of the iron core 2 is wrapped and bound through an outer wrapping part 9, the outer wrapping part 9 is an outer wrapping adhesive tape, and the iron core 2 is composed of a Z11 oriented silicon steel I sheet 21 and a Z11 oriented silicon steel E sheet 22.
The PCB-mounted high-current transformer also has the following advantages:
a. the size is small: compared with the traditional large-current transformer, the PCB-mounted large-current transformer has smaller size, is suitable for being mounted in a compact space and is convenient to integrate on a circuit board;
b. fast response: the PCB-mounted high-current transformer has the characteristic of quick response, can monitor and measure the change of current in real time, and plays a key role in real-time control and protection;
c. high precision: the PCB-mounted high-current transformer has higher measurement precision after accurate calibration and test, and can provide accurate and reliable current data;
d. the installation is simple and convenient: because the transformer is designed to be installed by a PCB, the installation process is relatively simple, and the transformer is only required to be installed at a proper position on the target circuit board and connected with a corresponding circuit;
e. the device is durable and reliable: the PCB-mounted high-current transformer adopts high-quality materials and manufacturing processes, has good durability and reliability, and can stably operate in a severe working environment.
The general assembly steps of the PCB-mounted high-current transformer are as follows:
1) The qualified framework is wound by a secondary coil by adopting an automatic winding twisting machine, and the beginning and the end of the secondary coil are respectively treated by 5 strands of twisting wires so as to enhance the stress intensity and prevent the breakage of leads in the subsequent manufacturing process and the use process of finished products; the middle baffle is stuck with a flange adhesive tape; a piece of covering adhesive tape is stuck on the winding starting end to prevent the short circuit phenomenon between the starting lead and the winding body, and after the winding of the coil is completed, the flange adhesive tape is reversely folded in the coil, and then two layers of adhesive tapes are wrapped outside;
2) Processing the secondary lead, performing soldering tin processing, and performing correlation test such as resistance and the like on the secondary coil;
3) The safety tape is stuck on the two sides of the framework coil, so that the insulation strength between the coil and the iron core is improved;
4) Carrying out automatic production treatment on the primary winding by adopting an automatic bending soldering tin forming machine, and carrying out insulating sleeve treatment on the U-shaped lead after the treatment;
5) Performing silicon steel sheet insertion treatment, performing performance test, and performing insulating tape wrapping treatment on the periphery of the steel sheet after the performance test is passed;
6) And inserting a primary positioning baffle plate and assembling a primary winding.
The foregoing is only a preferred embodiment of the utility model, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the utility model.
Claims (8)
1. A PCB-mounted high-current transformer comprises a main body framework (1) and an iron core (2), wherein the iron core (2) is inserted and wrapped on the main body framework (1), and a primary winding (3) and a secondary winding (4) are wound on the main body framework (1);
the method is characterized in that: the main body framework (1) is a split-slot framework, the primary winding (3) and the secondary winding (4) are respectively arranged in a separated mode corresponding to the slot body (10) of the main body framework (1), a creepage distance increasing component (5) is arranged between the primary winding (3) and the secondary winding (4), and creepage distances are increased through the slot wall (11) and the creepage distance increasing component (5) at intervals.
2. A PCB-mounted high current transformer according to claim 1, wherein: the creepage distance increasing component (5) is a flange adhesive tape arranged on the side face of the secondary winding (4).
3. A PCB-mounted high current transformer according to claim 1, wherein: an insulating protective layer (6) is laid on the part, which is surrounded and covered by the iron core (2), of the main body framework (1), and the coil winding is insulated and isolated from the iron core (2) through the insulating protective layer (6).
4. A PCB-mounted high current transformer according to claim 1, wherein: the mounting feet (12) of the main body framework (1) are provided with a plurality of mounting holes (13) to form a multi-hole-site mounting foot position structure.
5. The PCB-mounted high current transformer of claim 4, wherein: the framework pins (7) of the main framework (1) are positioned on the mounting pins (12), and the leading-out ends of the framework pins (7) are arranged on the same side as the mounting holes (13).
6. A PCB-mounted high current transformer according to claim 1, wherein: the primary winding (3) is of a U-shaped structure, the end part of the primary winding (3) of the U-shaped structure penetrates through a positioning inserting plate (16) fixed relative to the main body framework (1) to be shaped and arranged, and the primary winding (3) is fixed relative to the main body framework (1) through fixed epoxy (15) in a solidifying mode.
7. The PCB-mounted high current transformer of claim 6, wherein: the outside of the wire of the primary winding (3) is provided with a high-temperature insulating heat-shrinkable sleeve (8).
8. The PCB-mounted high current transformer of claim 7, wherein: the periphery of the iron core (2) is wrapped and bound through an outer wrapping part (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322059583.2U CN220491717U (en) | 2023-08-02 | 2023-08-02 | PCB-mounted high-current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322059583.2U CN220491717U (en) | 2023-08-02 | 2023-08-02 | PCB-mounted high-current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220491717U true CN220491717U (en) | 2024-02-13 |
Family
ID=89828299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322059583.2U Active CN220491717U (en) | 2023-08-02 | 2023-08-02 | PCB-mounted high-current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220491717U (en) |
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2023
- 2023-08-02 CN CN202322059583.2U patent/CN220491717U/en active Active
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