Network transformer

Abstract

This utility model discloses a network transformer, belonging to the technical field of network transformers. The network transformer includes a protective shell with a receiving cavity and at least four sets of transformer units. A partition is provided inside the protective shell, dividing the receiving cavity into a first partition cavity and a second partition cavity. Each transformer unit includes a magnetic core unit, which includes a first single-hole magnetic ring and a second single-hole magnetic ring. The first single-hole magnetic ring is disposed in the first partition cavity, and the second single-hole magnetic ring is disposed in the second partition cavity. The winding unit includes a first main magnetic winding and a second main magnetic winding. Both the first and second main magnetic windings are wound around the first single-hole magnetic ring. The tail end of the second winding of the first main magnetic winding and the head end of the fifth winding of the second main magnetic winding are wound around the second single-hole magnetic ring. This utility model reduces the complexity of the magnetic core structure and winding, which is beneficial for mass production.

Description

Technical Field

[0001] This utility model relates to the field of network transformer technology, and in particular to a network transformer. Background Technology

[0002] Network transformers, as a crucial electronic component, are precisely installed on network interface cards (NICs) and widely integrated into every corner of Ethernet devices, playing a vital role. They are not only the bridge for data transmission but also a core component ensuring network communication quality and improving system stability. Specifically, network transformers integrate multiple functions: they can efficiently transmit signals, ensuring accurate data transfer between devices; through precise impedance matching, they reduce signal reflection and loss, improving signal transmission efficiency and quality; simultaneously, they possess strong signal noise suppression capabilities, effectively filtering out external interference and ensuring signal purity; in high-voltage environments, network transformers provide reliable isolation protection to prevent equipment damage; furthermore, they support standard Power over Ethernet (PoE) functionality, providing stable power support for network devices.

[0003] In building the high-speed, high-bandwidth network architecture of 10 Gigabit Ethernet, a suitable network transformer becomes an indispensable and crucial component. With its astonishing transmission speed of up to 10 Gigabit Ethernet and its corresponding operating frequency—a baud rate of 833 MHz, approximately 450 MHz—10 Gigabit Ethernet presents unprecedented challenges to network transformers. To meet these stringent requirements, existing 10 Gigabit Ethernet network transformers generally employ a complex structure involving meticulously wound coils on a two-hole magnetic core. This design requires the winding wire to be repeatedly passed back and forth through two carefully designed through-holes in the magnetic core, using a precise winding process to construct the coil structure required for the 10 Gigabit Ethernet network transformer on the magnetic core.

[0004] However, while this combination of a dual-hole magnetic core and a complex winding structure achieves high-performance network transformers, it also brings significant drawbacks. First, the construction of the magnetic core and the winding structure are quite complex, increasing manufacturing difficulty and cost, and placing extremely high demands on production precision. Second, complex structures often mean higher failure rates and lower yields, which to some extent restricts the efficiency and effectiveness of large-scale mass production. Utility Model Content

[0005] The purpose of this invention is to provide a network transformer that reduces the complexity of the magnetic core structure and winding, which is beneficial for mass production.

[0006] To achieve the above objectives, the following technical solution is provided:

[0007] A network transformer includes a protective shell with a receiving cavity and at least four sets of transformer units. A partition is disposed within the protective shell, dividing the receiving cavity into a first partition cavity and a second partition cavity. Each set of transformer units includes:

[0008] The magnetic core unit includes a first single-hole magnetic ring and a second single-hole magnetic ring. The first single-hole magnetic ring is disposed in the first partition cavity, and the second single-hole magnetic ring is disposed in the second partition cavity. The axial direction of the first single-hole magnetic ring is perpendicular to the axial direction of the second single-hole magnetic ring.

[0009] The winding unit includes a first main magnetic winding and a second main magnetic winding. The first main magnetic winding includes a first winding, a second winding, and a third winding that are twisted together. The second main magnetic winding includes a fourth winding, a fifth winding, and a sixth winding that are twisted together. Both the first main magnetic winding and the second main magnetic winding are wound around the first single-hole magnetic ring. The tail end of the second winding of the first main magnetic winding and the head end of the fifth winding of the second main magnetic winding are wound around the second single-hole magnetic ring.

[0010] As an optional solution for the network transformer, the protective shell is provided with a first potting material and a second potting material, the first potting material covering the first single-hole magnetic ring and the second potting material covering the second single-hole magnetic ring.

[0011] As an optional solution for the network transformer, both the first potting material and the second potting material are made of silicone.

[0012] As an alternative to the network transformer, the heights of the upper surfaces of the first and second potting materials are both less than the height of the upper surface of the partition plate.

[0013] As an alternative to the network transformer, both the first main magnetic winding and the second main magnetic winding are wound 5-6 turns on the first single-hole magnetic ring.

[0014] As an alternative to the network transformer, five turns are wound on the tail of the second winding and the head of the fifth winding on the second single-hole magnetic ring.

[0015] As an alternative to the network transformer, the first single-hole magnetic ring has a permeability of 10000ui.

[0016] As an alternative to the network transformer, the second single-hole magnetic ring has a permeability of 800-1000 μI.

[0017] As an optional solution for the network transformer, the first single-hole magnetic ring is made of manganese-zinc ferrite, and the second single-hole magnetic ring is made of nickel-zinc ferrite.

[0018] As an alternative to the network transformer, the first and third windings are both gold, the second winding is green, the fourth and sixth windings are both blue, and the fifth winding is red.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] The network transformer provided by this invention uses two single-hole magnetic rings instead of the dual-hole magnetic cores commonly used in existing technologies, reducing the construction difficulty of the magnetic core unit. Furthermore, the coil winding method is improved by setting six windings, increasing transmission speed and operating frequency, making it suitable for 10 Gigabit Ethernet. This allows the network transformer to operate at higher frequency bands, enhancing the signal, extending transmission distance, and isolating the chip from external circuitry. Moreover, by placing the first and second single-hole magnetic rings respectively within the first and second partition cavities, their positions within the network transformer are defined, preventing displacement of the first and second single-hole magnetic rings during subsequent adhesive fixing. This would prevent adhesive overflow onto the outer casing or adjacent components, affecting high-frequency network parameter values ​​and causing them to fail to meet standards. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the first main magnetic winding wire in an embodiment of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the second main magnetic winding wire in an embodiment of this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the first main magnetic winding wire and the second main magnetic winding wire wound around the first main magnetic winding wire in an embodiment of this utility model (before the head and tail of the relevant winding wires are twisted together);

[0025] Figure 4 This is a schematic diagram of the structure of the first main magnetic winding wire and the second main magnetic winding wire wound around the first main magnetic winding wire in an embodiment of the present invention (after the head and tail of the relevant winding wires are twisted together);

[0026] Figure 5This is a schematic diagram of the structure after the winding unit and the magnetic core unit are combined in an embodiment of this utility model;

[0027] Figure 6 This is a schematic diagram of the protective shell in an embodiment of the present utility model;

[0028] Figure 7 This is a schematic diagram of the network transformer in an embodiment of the present invention.

[0029] Figure 8 This is a wiring diagram illustrating the network transformer in an embodiment of this utility model.

[0030] Figure label:

[0031] 1. Protective shell; 11. Partition plate; 12. First partition cavity; 13. Second partition cavity; 2. First single-hole magnetic ring; 3. Second single-hole magnetic ring; 4. First main magnetic winding; 5. Second main magnetic winding; 6. First tap; 7. Second tap; 8. First stranded wire; 9. Second stranded wire;

[0032] 001, First winding; 002, Second winding; 003, Third winding; 004, Fourth winding; 005, Fifth winding; 006, Sixth winding. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0035] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0037] To reduce the complexity of the magnetic core construction and winding, and to facilitate mass production, this embodiment provides a network transformer, which is described below in conjunction with... Figures 1 to 8 The specific content of this embodiment will be described in detail.

[0038] The network transformer described in this embodiment is ingeniously designed and uniquely structured to meet a data transmission rate of 25Gbps (gigabits per second). The core components of the network transformer in this embodiment include a protective shell 1 with a housing cavity and at least four carefully configured transformer units. The protective shell 1, as the external protective layer of the entire network transformer, not only provides necessary physical protection for the internal components but also optimizes the operating performance of the network transformer through its finely designed internal structure. Specifically, a partition 11 is cleverly arranged inside the protective shell 1, which effectively divides the housing cavity into two independent parts: a first partition cavity 12 and a second partition cavity 13. This partition design not only improves the utilization of internal space but also lays the foundation for subsequent component layout and performance optimization. Each transformer unit consists of two core parts: a magnetic core unit and a winding unit. They work together to achieve the high efficiency of the network transformer. The magnetic core unit is the "heart" of the transformer, determining its basic electromagnetic characteristics. In this embodiment, the magnetic core unit innovatively adopts a combination of a first single-hole magnetic ring 2 and a second single-hole magnetic ring 3. The two single-hole magnetic rings are respectively placed in the first partition cavity 12 and the second partition cavity 13, and their axes are perpendicular to each other. This layout not only optimizes the distribution of the magnetic circuit but also enhances the concentration effect of the magnetic field, thereby improving the overall performance of the transformer. The winding unit is the "blood" of the transformer, responsible for transmitting electrical energy efficiently and stably. The winding unit design in this embodiment is particularly outstanding. It includes a first main magnetic winding 4 and a second main magnetic winding 5, both of which are composed of three twisted windings. Specifically, the first main magnetic winding 4 is formed by twisting the first winding 001, the second winding 002, and the third winding 003 together, while the second main magnetic winding 5 is formed by twisting the fourth winding 004, the fifth winding 005, and the sixth winding 006 together. This twisting method not only enhances the mechanical strength of the windings but also improves their electrical performance, enabling the network transformer to better adapt to high-frequency, high-speed operating environments.

[0039] During the winding process, the first main magnetic winding 4 and the second main magnetic winding 5 are tightly wound on the first single-hole magnetic ring 2, forming a stable magnetic field distribution. The tail of the second winding 002 of the first main magnetic winding 4 and the head of the fifth winding 005 of the second main magnetic winding 5 are cleverly wound on the second single-hole magnetic ring 3. This cross-ring winding method further optimizes the magnetic circuit layout and improves the transformer's conversion efficiency. It is particularly worth mentioning that the winding unit in this embodiment also achieves several key functions through a meticulous twisting design. Specifically, after the first main magnetic winding 4 and the second main magnetic winding 5 are led out from the first single-hole magnetic ring 2, they undergo a series of twisting operations to form multiple taps and stranded wires with specific functions. For example, the tail of the first winding 001, the tail of the third winding 003, the head of the fourth winding 004, and the head of the sixth winding 006 are twisted to form the first tap 6 (also called a gold-blue strand). This design realizes the function of the primary center tap, providing a stable current input point for the network transformer. Similarly, the head of the second winding 002 and the tail of the fifth winding 005 are twisted together to form the second tap 7 (also known as red-green twist), realizing the function of the secondary center tap and facilitating current output. Furthermore, the head of the first winding 001 and the head of the third winding 003 are twisted together to form the first stranded wire 8 (also known as gold-gold head), and the tail of the fourth winding 004 and the tail of the sixth winding 006 are twisted together to form the second stranded wire 9 (also known as blue-blue tail). Both stranded wires are used as electrodes, further enhancing the electrical connection performance of the network transformer. The tail of the second winding 002 (also known as green tail) and the head of the fifth winding 005 (also known as red head), which are led out from the second single-hole magnetic ring 3, are also used as electrodes. This design makes the electrical connection of the network transformer more flexible and diverse.

[0040] The network transformer provided by this utility model achieves a significant performance improvement mainly due to the following aspects: Innovative core unit design: Using two single-hole magnetic rings instead of the commonly used double-hole magnetic cores in existing technologies not only reduces the construction difficulty and cost of the core unit but also optimizes the magnetic circuit distribution and improves the concentration of the magnetic field through its unique layout. This design allows the network transformer to maintain stable performance output even in high-frequency, high-speed operating environments. Precise winding unit layout: By setting six carefully twisted windings and adopting a winding method that crosses the magnetic rings, the network transformer in this embodiment achieves higher transmission speeds and operating frequencies. This design not only enhances the mechanical strength and electrical performance of the windings but also optimizes the layout of the magnetic circuit and the distribution of the magnetic field, thereby improving the conversion efficiency and stability of the network transformer. Clever use of partition cavities: Arranging the first single-hole magnetic ring 2 and the second single-hole magnetic ring 3 respectively within the first partition cavity 12 and the second partition cavity 13 not only defines their positions within the network transformer but also avoids potential displacement problems during subsequent glue application and fixing. This design ensures the precision and stability of the network transformer during manufacturing, while also helping to prevent adhesive overflow onto the outer periphery of the protective housing 1 or adjacent parts, thereby guaranteeing the accuracy and compliance of high-frequency network parameter values. The setting and optimization of the partition 11: By setting the partition 11 inside the protective housing 1, the network transformer in this embodiment effectively solves the problem of silicone easily flowing onto the leads of the single-hole magnetic ring coil. This design not only ensures the standard values ​​of the network high-frequency parameters but also improves product yield and reduces the number of scraps caused by data non-compliance.

[0041] Understandably, the protective shell 1 contains at least one magnetic ring assembly, and multiple magnetic ring assemblies can be provided. Each magnetic ring assembly provides 24 pins on the protective shell 1 for connection to the network card circuit board. Each magnetic ring assembly includes four transformer units, and each transformer unit includes a first single-hole magnetic ring 2 and a second single-hole magnetic ring 3, which are arranged in pairs. When multiple magnetic ring assemblies are provided, the number of first single-hole magnetic rings 2 is a multiple of four, and the number of second single-hole magnetic rings 3 is a multiple of four.

[0042] Furthermore, the protective shell 1 contains a first potting material and a second potting material. The first potting material covers the first single-hole magnetic ring 2, and the second potting material covers the second single-hole magnetic ring 3. Through their strong adhesive force, the first and second potting materials firmly bond the magnetic rings and winding units together, effectively resisting the effects of external mechanical and thermal stresses, thereby significantly improving the structural stability of the network transformer. This stability is one of the key factors ensuring that the performance of the network transformer does not degrade during long-term operation. The electrical insulation properties of the potting material effectively isolate the electrical connection between the winding units and the external environment, reducing the possibility of electromagnetic interference and signal attenuation. Simultaneously, the potting material can also absorb and disperse the heat generated during the operation of the winding units to a certain extent, helping to maintain the stability of the internal temperature of the network transformer and further optimizing its electrical performance. By completely covering the magnetic rings and winding units, the potting material effectively prevents the generation and spread of electric arcs. In high-voltage or high-current environments, electric arcs may cause fires or damage internal components of the network transformer, while the application of the potting material fundamentally eliminates this safety hazard. The potting material's role in securing the magnetic ring and winding unit ensures the stability and consistency of the network transformer during high-speed data transmission. This stability directly affects the maintenance of network transmission speed and quality, providing users with a smoother and more reliable network experience.

[0043] Optionally, both the first and second potting materials are made of silicone. The softness and elasticity of silicone allow it to adhere tightly to every detail of the magnetic ring and winding unit, forming a uniform and dense protective layer. In extreme weather conditions such as lightning strikes, network transformers may face the risk of lightning damage. When the exposed winding portion is struck by lightning, silicone's excellent insulation and arc-resistance properties effectively prevent current from forming an arc between the exposed winding portion and the surrounding environment. Silicone's high resistivity and good dielectric strength make it an ideal material for preventing arcing, thus protecting the network transformer from lightning damage and ensuring stable equipment operation. As a potting material, silicone's superior electrical insulation properties provide additional safety for the network transformer. It effectively isolates the electrical connection between the winding unit and the external environment, reducing electromagnetic interference and signal attenuation, and improving the stability and reliability of network transmission. Simultaneously, silicone can absorb and disperse the heat generated during the operation of the winding unit to a certain extent, helping to maintain the stability of the network transformer's internal temperature and further optimizing its electrical performance. Silicone potting materials not only possess excellent electrical properties but also outstanding mechanical strength and weather resistance. They can resist external mechanical stress and environmental factors such as vibration, impact, and temperature changes, ensuring stable performance of the network transformer even in harsh environments. Furthermore, silicone exhibits good aging resistance, maintaining the stability of its physical and chemical properties over a long period, thus extending the service life of the network transformer. Although silicone itself has some thermal insulation properties, in the design of network transformers, by properly controlling the thickness and distribution of the silicone, it can ensure electrical insulation without hindering effective heat dissipation. The softness and elasticity of silicone allow it to adapt to the thermal expansion and contraction of the magnetic ring and winding unit, maintaining unobstructed heat dissipation channels and ensuring that the network transformer will not be damaged by overheating during long-term operation.

[0044] Furthermore, the heights of the upper surfaces of both the first and second potting materials are less than the height of the upper surface of the partition 11. The height design of the partition 11 allows the first and second potting materials to be precisely positioned within their respective compartments, avoiding uneven filling or overflow caused by material flow. This precise positioning not only ensures the neatness and orderliness of the internal structure of the network transformer but also facilitates subsequent assembly and testing. Through the adhesive-blocking function of the partition 11, the first and second potting materials can fully utilize their performance advantages within their respective compartments. The first potting material tightly wraps the first single-hole magnetic ring 2 and its winding unit, providing stable electrical insulation and mechanical support; the second potting material similarly provides comprehensive protection for the second single-hole magnetic ring 3 and its winding unit. This partitioned potting method effectively avoids mutual interference between different materials, improving the overall performance and reliability of the network transformer. The adhesive-blocking function of the partition 11 also greatly simplifies the manufacturing process of the network transformer. During the dispensing process, precise filling of the potting material can be achieved without the need for additional complex adhesive-blocking structures or high-precision dispensing equipment. This not only reduces production costs but also improves production efficiency, enabling network transformers to be brought to market more quickly and meet customer needs. Because the partition 11 effectively prevents the flow of potting material, the internal structure of the network transformer remains more stable when facing external environmental factors such as temperature changes and vibrations. This stability helps improve the environmental adaptability of the network transformer, allowing it to maintain good operating performance under various harsh conditions.

[0045] Furthermore, the first main magnetic winding 4 and the second main magnetic winding 5 are both wound 5-6 times on the first single-hole magnetic ring 2. This number of turns is not arbitrary, but rather the optimal solution derived from extensive experiments and calculations. Too few turns may lead to insufficient magnetic coupling, affecting signal transmission efficiency; while too many turns may increase the risk of magnetic ring saturation and also increase production costs. Therefore, 5 to 6 turns ensure sufficient magnetic coupling strength while also being cost-effective.

[0046] Furthermore, five turns are made at the tail of the second winding 002 of the first main magnetic winding 4 and the head of the fifth winding 005 of the second main magnetic winding 5 on the second single-hole magnetic ring 3. This design not only strengthens the magnetic field distribution of the second single-hole magnetic ring 3, but also optimizes the signal transmission path through a specific winding method. In this embodiment, after the first main magnetic winding 4 and the second main magnetic winding 5 are led out from the first single-hole magnetic ring 2, the tail of the second winding 002 and the head of the fifth winding 005 are twisted together and wound around the second single-hole magnetic ring 3. This twisting and winding method not only enhances the electrical connection between the windings, but also effectively reduces interference and loss during signal transmission.

[0047] Understandably, by precisely controlling the number of winding coils, this invention ensures a uniform and moderately strong magnetic field distribution on the first single-hole magnetic ring 2 and the second single-hole magnetic ring 3, thereby improving signal transmission efficiency. Simultaneously, the twisted winding design further reduces signal attenuation during transmission, ensuring signal integrity and accuracy. The optimized design of the number of winding coils results in tighter magnetic coupling between the first main magnetic winding 4 and the second main magnetic winding 5 and the magnetic ring. This tight magnetic coupling not only increases the inductance of the network transformer but also enhances its resistance to external interference, thus improving the overall performance of the product. Twisting the tail of the second winding 002 and the head of the fifth winding 005 together and winding them onto the second single-hole magnetic ring 3 cleverly optimizes the signal transmission path. It reduces signal deflection and reflection during transmission, lowering the risk of signal distortion and ensuring the stability and reliability of signal transmission. By precisely controlling the number of winding coils and employing a twisted winding design, this invention reduces production costs while ensuring product performance. Reducing the number of coils in the winding means lower material consumption, while the stranded winding method improves winding utilization and production efficiency. The optimized winding design allows the network transformer to maintain more stable performance when facing external environmental factors such as temperature changes and vibration. Because the tight magnetic coupling and optimized signal transmission path reduce the impact of the external environment on signal transmission, the product's environmental adaptability is improved.

[0048] Furthermore, the first single-hole magnetic ring 2 possesses a permeability of up to 10,000 μI, a high permeability characteristic that enables the ring to exhibit extremely strong magnetic response in a magnetic field. High permeability means that under the same magnetic field strength, the first single-hole magnetic ring 2 can generate a larger magnetic flux, thereby enhancing the core's concentration and guidance of the magnetic field. In network transformers, this characteristic helps improve signal transmission efficiency and reduce signal attenuation during transmission. Especially in high-frequency, high-speed data transmission scenarios, the high-permeability magnetic ring can more effectively maintain signal integrity and stability.

[0049] Furthermore, the permeability of the second single-hole magnetic ring 3 is 800μi-1000μi. Compared to the first single-hole magnetic ring 2, the permeability range of the second single-hole magnetic ring 3 is set between 800μi and 1000μi. This relatively low permeability range is not arbitrary but based on specific technical considerations. At a lower permeability, the second single-hole magnetic ring 3 responds more smoothly to magnetic fields, which helps to achieve more precise magnetic field control in network transformers. Especially in applications requiring a balance between signal transmission and electromagnetic interference (EMI) suppression, the lower permeability of the magnetic ring can more effectively reduce unnecessary magnetic field radiation and improve the electromagnetic compatibility of the network transformer. In addition, the setting of the permeability range also takes into account material costs and manufacturing process feasibility, making the second single-hole magnetic ring 3 more economical and practical while maintaining performance.

[0050] The differentiated permeability configuration of the first single-hole magnetic ring 2 and the second single-hole magnetic ring 3 achieves complementary and optimized performance. The high-permeability first single-hole magnetic ring 2 is responsible for efficient signal transmission, while the low-permeability second single-hole magnetic ring 3 is responsible for suppressing electromagnetic interference and finely controlling the magnetic field. This division of labor significantly improves the overall performance of the network transformer. By adjusting the permeability range of the second single-hole magnetic ring 3, the network transformer of this invention can better adapt to different application scenarios. In applications requiring high signal transmission efficiency, a second single-hole magnetic ring 3 with a permeability close to the upper limit can be selected; while in applications with high electromagnetic compatibility requirements, a second single-hole magnetic ring 3 with a permeability close to the lower limit can be selected. This flexibility gives the network transformer a wider range of application prospects. The setting of the permeability range also considers material costs and manufacturing process feasibility. By selecting an appropriate permeability range, material costs can be reduced and production efficiency improved while ensuring performance. The differentiated permeability configuration also helps to enhance the reliability and stability of the network transformer. The high-permeability first single-hole magnetic ring 2 ensures the stability of signal transmission, while the second single-hole magnetic ring 3, located in the low-permeability range, reduces performance fluctuations caused by magnetic field fluctuations. This dual protection enables the network transformer to maintain stable performance output even in complex and variable operating environments.

[0051] Furthermore, the first single-hole magnetic ring 2 is made of manganese-zinc ferrite, a soft magnetic material with high permeability. Its high permeability allows it to respond quickly and concentrate the magnetic field in a magnetic field, generating a large magnetic flux even at relatively low magnetic field strengths. Simultaneously, manganese-zinc ferrite exhibits low losses at low frequencies, effectively converting electrical energy into magnetic energy and reducing energy loss during the conversion process. The second single-hole magnetic ring 3 is made of nickel-zinc ferrite. Unlike manganese-zinc ferrite, nickel-zinc ferrite has relatively low permeability but exhibits excellent performance at high frequencies. Nickel-zinc ferrite has high resistivity, resulting in low eddy current losses during high-frequency operation and maintaining good magnetic properties. In addition, nickel-zinc ferrite also possesses good temperature stability and corrosion resistance, enabling it to operate normally in harsh environments.

[0052] In network transformers, different frequency signals require different magnetic materials for processing. The first single-hole magnetic ring 2 uses manganese-zinc ferrite, which, utilizing its high permeability and low-frequency, low-loss characteristics, effectively processes low-frequency signals, ensuring transmission quality and efficiency. The second single-hole magnetic ring 3 uses nickel-zinc ferrite, whose excellent performance in the high-frequency band allows for efficient processing of high-frequency signals, reducing attenuation and distortion. This material combination enables the network transformer to maintain good performance over a wide frequency range, meeting the transmission requirements of different frequency signals, and is particularly suitable for complex network environments such as 10 Gigabit Ethernet that require processing multiple frequency signals. Because manganese-zinc ferrite has low loss in the low-frequency band and nickel-zinc ferrite has low eddy current loss in the high-frequency band, the combination of these two materials effectively reduces the overall loss of the network transformer at different frequencies. Low loss means less energy is lost as heat, improving the energy conversion efficiency of the network transformer, reducing energy waste, and also reducing the heat generated during operation, contributing to improved equipment stability and reliability, and extending service life. The high resistivity of nickel-zinc ferrite reduces electromagnetic radiation and interference to surrounding electronic equipment during high-frequency operation. Simultaneously, the complementary magnetic properties of manganese-zinc ferrite and nickel-zinc ferrite help optimize the magnetic field distribution within the network transformer, reducing magnetic field leakage and further improving electromagnetic compatibility (EMC). In complex electronic equipment environments, good EMC ensures the network transformer can work properly with other devices, preventing signal errors or equipment malfunctions caused by electromagnetic interference. Both manganese-zinc ferrite and nickel-zinc ferrite are relatively mature and cost-effective magnetic materials. By rationally selecting these two materials for the first single-hole magnetic ring 2 and the second single-hole magnetic ring 3, respectively, the high performance of the network transformer is ensured while also considering cost factors. This material combination satisfies the product's performance requirements while effectively controlling costs, enhancing the product's market competitiveness. The good temperature stability and corrosion resistance of nickel-zinc ferrite allow the second single-hole magnetic ring 3 to operate normally under conditions of large temperature variations or harsh environments. Combined with the performance of manganese-zinc ferrite, the overall environmental adaptability of the network transformer is enhanced. It maintains stable performance in environments with high temperature, low temperature, or humidity, ensuring reliable transmission of network signals.

[0053] Specifically, the first winding 001 and the third winding 003 are both gold, the second winding 002 is green, the fourth winding 004 and the sixth winding 006 are both blue, and the fifth winding 005 is red. The gold color of the first and third windings allows workers to quickly and accurately identify them during manufacturing and subsequent maintenance. The green color of the second winding contrasts sharply with the gold, making it easy to distinguish. Similarly, the blue color of the fourth and sixth windings distinguishes them from the gold and green windings while maintaining visual harmony. The red color of the fifth winding, a striking color, allows it to stand out among the windings, facilitating quick location by operators.

[0054] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A network transformer, comprising a protective housing (1) having a receiving cavity and at least four sets of transformer units, characterized in that, The protective shell (1) is provided with a partition (11), which divides the receiving cavity into a first partition cavity (12) and a second partition cavity (13). Each group of transformer units includes: The magnetic core unit includes a first single-hole magnetic ring (2) and a second single-hole magnetic ring (3). The first single-hole magnetic ring (2) is disposed in the first partition cavity (12), and the second single-hole magnetic ring (3) is disposed in the second partition cavity (13). The axial direction of the first single-hole magnetic ring (2) is perpendicular to the axial direction of the second single-hole magnetic ring (3). The winding unit includes a first main magnetic winding (4) and a second main magnetic winding (5). The first main magnetic winding (4) includes a first winding (001), a second winding (002) and a third winding (003) twisted together. The second main magnetic winding (5) includes a fourth winding (004), a fifth winding (005) and a sixth winding (006) twisted together. The first main magnetic winding (4) and the second main magnetic winding (5) are both wound around the first single-hole magnetic ring (2). The tail of the second winding (002) of the first main magnetic winding (4) and the head of the fifth winding (005) of the second main magnetic winding (5) are both wound around the second single-hole magnetic ring (3).

2. The network transformer according to claim 1, characterized in that, The protective shell (1) is provided with a first potting material and a second potting material. The first potting material covers the first single-hole magnetic ring (2), and the second potting material covers the second single-hole magnetic ring (3).

3. The network transformer according to claim 2, characterized in that, Both the first potting material and the second potting material are made of silicone.

4. The network transformer according to claim 2, characterized in that, The height of the upper surface of the first potting material and the upper surface of the second potting material are both less than the height of the upper surface of the partition (11).

5. The network transformer according to claim 1, characterized in that, The first main magnetic loop (4) and the second main magnetic loop (5) are both wound 5-6 times on the first single-hole magnetic ring (2).

6. The network transformer according to claim 1, characterized in that, Five turns are made on the tail of the second winding (002) and the head of the fifth winding (005) on the second single-hole magnetic ring (3).

7. The network transformer according to claim 1, characterized in that, The permeability of the first single-hole magnetic ring (2) is 10000ui.

8. The network transformer according to claim 7, characterized in that, The permeability of the second single-hole magnetic ring (3) is 800-1000 μi.

9. The network transformer according to claim 8, characterized in that, The first single-hole magnetic ring (2) is made of manganese-zinc ferrite, and the second single-hole magnetic ring (3) is made of nickel-zinc ferrite.

10. The network transformer according to any one of claims 1-9, characterized in that, The first winding (001) and the third winding (003) are both gold in color, the second winding (002) is green in color, the fourth winding (004) and the sixth winding (006) are both blue in color, and the fifth winding (005) is red in color.

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