Multi-channel signal transformer bank

Abstract

The invention provides a multi-channel signal transformer bank. The multi-channel signal transformer bank comprises an insulating bottom plate and a plurality of transformers, the plurality of transformers are arranged on the insulating bottom plate; the transformer comprises a magnetic core, a primary coil and a secondary coil, wherein the primary coil and the secondary coil are wound on the magnetic core. A plurality of primary leading-out ends are led out from the primary coil through a center tap, and a plurality of secondary leading-out ends are led out from the secondary coil through a plurality of windings. According to the transformer bank, the plurality of transformers are arranged on the same insulating bottom plate, the structure is compact, the integration degree is high, the size of the whole transformer bank is reduced, and the signal processing efficiency is greatly improved. The primary coil adopts a center tapped mode, so that the effects of adjusting output voltage, preventing harmonic interference, providing a stable voltage source, reducing common-mode current / voltage and providing direct-current bias for Rx / Tx signals in the transformer can be effectively achieved; and the secondary coil adopts a multi-path winding so as to meet various converted voltage values in use, and the transmission efficiency of the transformer bank is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of transformers, and more specifically, relates to a multi-channel signal transformer group. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. In modern electronic devices, signal transmission and processing are becoming more and more complex, and the requirements for signal isolation and conversion are becoming higher and higher. Traditional single-channel signal transformers can no longer meet the needs of multi-channel signal processing.

[0003] Although the existing multi-channel signal transformer group can process multi-channel signals, it has a complex structure, a large size, a high cost, and its performance is often limited in high-frequency applications. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a multi-channel signal transformer group to solve the technical problems existing in the prior art of large size, low degree of integration and slow transmission speed of the transformer group.

[0005] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide a multi-channel signal transformer group, including an insulating base plate and multiple transformers; multiple transformers are arranged on the insulating base plate; the transformer includes a magnetic core and a primary coil and a secondary coil wound on the magnetic core; the primary coil leads to multiple primary lead-out terminals through a center tap, and the secondary coil leads to multiple secondary lead-out terminals through a multi-channel winding.

[0006] Optionally, the transformer is surface mounted on the insulating base plate.

[0007] Optionally, a plurality of primary pads and secondary pads are provided on the insulating bottom plate, one of the primary lead-out terminals is welded on one of the primary pads, and one of the secondary lead-out terminals is welded on one of the secondary pads.

[0008] Optionally, the primary pad includes a Ni layer and an Au layer arranged sequentially from bottom to top.

[0009] Optionally, the structure of the secondary pad is the same as that of the primary pad.

[0010] Optionally, the insulating base plate is a ceramic plate.

[0011] Optionally, the magnetic core is a ring structure.

[0012] Optionally, the primary coil is a coil wound using a full cross winding method.

[0013] Optionally, the secondary coil is a coil wound using a full cross winding method.

[0014] The multi-channel signal transformer group also includes a heat sink, and the heat sink is fixed below the insulating bottom plate.

[0015] The beneficial effect of the multi-channel signal transformer group provided by the present application is that: compared with the prior art, in the present application, multiple transformers are arranged on an insulating base plate, with a compact structure and a high degree of integration, which reduces the volume of the entire transformer group and greatly improves the efficiency of signal processing. The primary coil adopts a center tap method, which can effectively adjust the output voltage, prevent harmonic interference, provide a stable voltage source, reduce common mode current / voltage and provide a DC bias for the Rx / Tx signal in the transformer; the secondary coil adopts a multi-channel winding to meet the various voltage values ​​converted during use, thereby improving the transmission efficiency of the transformer group. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A schematic diagram of the main structure of a multi-channel signal transformer group provided in an embodiment of the present application;

[0018] Figure 2 A schematic diagram of the side structure of a multi-channel signal transformer group provided in an embodiment of the present application;

[0019] Figure 3 A schematic diagram of the main structure of an insulating base plate in a multi-channel signal transformer group provided in an embodiment of the present application;

[0020] Figure 4 This is a working principle diagram of the multi-channel signal transformer group provided in an embodiment of the present application.

[0021] Among them, the reference numerals in the figure are:

[0022] 100-insulation base plate;

[0023] 110-primary pad;

[0024] 120- secondary pad;

[0025] 200- Transformer;

[0026] 210-magnetic core;

[0027] 220-primary coil;

[0028] 221-primary lead terminal;

[0029] 230-secondary coil;

[0030] 231-Secondary lead-out terminal. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0033] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] Please also read Figure 1 and Figure 2 The multi-channel signal transformer set provided by the embodiment of the present application is now described. The multi-channel signal transformer set includes an insulating base plate 100 and a plurality of transformers 200; the plurality of transformers 200 are arranged on the insulating base plate 100; the transformer 200 includes a magnetic core 210 and a primary coil 220 and a secondary coil 230 wound on the magnetic core 210; the primary coil 220 leads to a plurality of primary lead-out terminals 221 through a center tap, and the secondary coil 230 leads to a plurality of secondary lead-out terminals 231 through a multi-channel winding.

[0036] Compared with the prior art, the multi-channel signal transformer group provided by the present application, in the embodiment of the present application, multiple transformers 200 are all arranged on an insulating base plate 100, with a compact structure and a high degree of integration, which reduces the volume of the entire transformer group and greatly improves the efficiency of signal processing. The primary coil 220 adopts a center tap method, which can effectively adjust the output voltage, prevent harmonic interference, provide a stable voltage source, reduce common mode current / voltage, and provide a DC bias for the Rx / Tx (transmit / receive) signal in the transformer 200; the secondary coil 230 adopts a multi-channel winding to meet the various voltage values ​​converted during use, thereby improving the transmission efficiency of the transformer group.

[0037] It is understood that the center tap is a circuit design term that usually refers to an additional tap located at the center of a component such as a transformer or inductor. This tap can be used to obtain a voltage proportional to the main winding voltage, or in some cases, to provide a current proportional to the main current. The design of the center tap allows the circuit to switch between two different voltage levels or provide a reference ground when needed.

[0038] Specifically, the center tap of the primary coil 220 can effectively adjust the output voltage of the transformer 200 by changing the winding turns ratio; the center tap can help eliminate harmonic interference and protect the load device from voltage fluctuations by being connected to the load device; the center tap can also provide a low impedance path for common mode current, which helps to reduce electromagnetic interference.

[0039] In one embodiment of the present application, the transformer 200 is surface mounted on the insulating base plate 100 .

[0040] It is understandable that the full name of surface mount technology (Surface Mount Technology, SMT for short) is an electronic assembly technology used to mount electronic components directly to the surface of a printed circuit board (PCB). Compared with traditional through-hole technology (THT), surface mount technology can achieve smaller component size, higher assembly density and faster production speed. The transformer 200 in this application adopts a surface mount installation method, which can reduce the lead length and reduce the influence of parasitic inductance and distributed capacitance.

[0041] The multi-channel signal transformer group of the embodiment of the present application has good reliability. It is installed as a surface mount structure during design to ensure the reliability of the solder joints when the transformer 200 undergoes reflow soldering (maximum temperature 245 degrees); then the various components are combined into one by high-temperature bonding to ensure better reliability of the multi-channel signal transformer group when the whole machine is used.

[0042] In one embodiment of the present application, please refer to Figure 1 and Figure 3 , a plurality of primary pads 110 and secondary pads 120 are provided on the insulating base plate 100, a primary lead-out terminal 221 is welded on a primary pad 110, and a secondary lead-out terminal 231 is welded on a secondary pad 120. That is, the number of primary pads 110 is equal to the number of primary lead-out terminals 221, and the number of secondary pads 120 is equal to the number of secondary lead-out terminals 231.

[0043] Specifically, the wire diameter of the welding wire used for welding is φ0.015mm-φ0.25mm, and the primary lead-out terminal 221 is welded to the primary pad 110 by resistance welding, and the secondary lead-out terminal 231 is welded to the secondary pad 120. The resistance welding method has good welding reliability and can effectively ensure good contact between the primary lead-out terminal 221 and the primary pad 110, as well as good contact between the secondary lead-out terminal 231 and the secondary pad 120.

[0044] In one embodiment of the present application, the primary pad 110 includes a Ni layer (not shown) and an Au layer (not shown) sequentially arranged from bottom to top.

[0045] In this embodiment, the primary pad 110 can provide good welding performance and corrosion resistance by providing a Ni layer (nickel layer) and an Au layer (gold layer).

[0046] Specifically, the Ni layer and the Au layer are disposed on the insulating base plate 100 by electroplating. First, the Ni layer is electroplated on the insulating base plate 100, and the thickness of the Ni layer is 2.5 to 8.0 μm; then, the Au layer is electroplated on the Ni layer, and the thickness of the Au layer is 1.5 μmMin.

[0047] In one embodiment of the present application, the structure of the secondary pad 120 is the same as that of the primary pad 110 .

[0048] In this embodiment, the structure of the secondary pad 120 is the same as that of the primary pad 110 , thereby ensuring the consistency of the pad and the stability of signal transmission.

[0049] In one embodiment of the present application, the insulating base plate 100 is a ceramic plate.

[0050] In this embodiment, the insulating base plate 100 is made of a ceramic plate, which has good insulation performance and heat resistance and is suitable for working in a high temperature environment.

[0051] In another embodiment of the present application, the material of the insulating base plate 100 can also be selected from other materials with high insulation performance and good thermal stability, such as polyimide or epoxy resin. Such material selection helps to ensure that the transformer group can still maintain good electrical performance and structural stability in a high temperature environment. The shape of the insulating base plate 100 is designed to be rectangular to meet the installation requirements of most circuit boards. At the same time, positioning holes are provided on the edge of the base plate to facilitate accurate alignment and fixation with the circuit board or other components.

[0052] In one embodiment of the present application, see Figure 1 , the magnetic core 210 is a ring structure.

[0053] In this embodiment, the magnetic core 210 adopts a ring structure, which can effectively reduce magnetic leakage and improve the efficiency and performance of the transformer 200.

[0054] In another embodiment of the present application, the magnetic core 210 of the transformer 200 is made of ferrite material, which has high magnetic permeability and low loss and is suitable for high-frequency signal transmission. The primary coil 220 and the secondary coil 230 are both wound with high-purity copper wire to reduce resistance loss and improve transmission efficiency.

[0055] In one embodiment of the present application, the primary coil 220 is a coil wound in a full cross winding method.

[0056] In one embodiment of the present application, the secondary coil 230 is a coil wound in a full cross winding method.

[0057] It is understandable that full cross winding is a special winding technology used in the cable manufacturing process, which crosses the wires in the cable by winding the wires in a cross manner, thereby reducing electromagnetic interference and improving the quality of signal transmission. In this embodiment, the primary coil 220 and the secondary coil 230 are both wound using the full cross winding method, which can reduce the coupling between the coils and improve the isolation of the signal, thereby ensuring the clarity and stability of the signal transmission.

[0058] In this embodiment, the primary coil 220 has 30-42 turns, the secondary coil 230 has 5-9 turns for windings 7-6 and 5-4, and 74-88 turns for winding 6-5.

[0059] In another embodiment of the present application, the multi-channel signal transformer group further includes a shielding cover (not shown), which covers the top of the transformer 200 to reduce the impact of electromagnetic interference on surrounding circuits. The shielding cover is usually made of conductive materials, such as copper or aluminum, which can effectively shield the interference of external electromagnetic fields and also prevent the electromagnetic field generated by the transformer 200 from affecting other sensitive circuits.

[0060] In another embodiment of the present application, the multi-channel signal transformer group further includes a heat sink (not shown), which is fixed below the insulating base plate 100 to improve the heat dissipation performance of the transformer group. The material of the heat sink is selected to be a metal material with good thermal conductivity, such as aluminum or copper. The shape of the heat sink is designed to match the shape of the transformer group to maximize the heat dissipation area, thereby effectively reducing the temperature of the transformer group during operation and improving its stability and service life.

[0061] In another embodiment of the present application, the multi-channel signal transformer group further includes a temperature sensor (not shown), which is mounted on the insulating base plate 100, close to the heat source of the transformer 200. The temperature sensor is used to monitor the operating temperature of the transformer 200 in real time. When the temperature exceeds the preset safety threshold, the sensor triggers an alarm system to promptly notify the operator or automatically start a cooling mechanism to prevent equipment damage or performance degradation caused by overheating. The introduction of the temperature sensor further enhances the safety and reliability of the transformer group.

[0062] In another embodiment of the present application, the multi-channel signal transformer group further includes a filter circuit (not shown), which is connected to the output end of the transformer 200. The filter circuit is mainly composed of an inductor, a capacitor and a resistor, and is used to filter out high-frequency noise and ripples in the output voltage of the transformer 200 to ensure that the voltage received by the load device is smoother and more stable. The design and selection of the filter circuit depends on the specific requirements of the load device for voltage quality to meet the precise control requirements of different application scenarios.

[0063] In another embodiment of the present application, the multi-channel signal transformer group further includes a programmable logic controller (PLC), which is connected to the primary and secondary coils 230 of the transformer 200. The PLC is used to dynamically adjust the output voltage of the transformer 200 according to the real-time needs of the load device to achieve intelligent voltage management. Through programming, the PLC can implement a variety of control strategies, such as constant voltage control, load adaptive adjustment, etc., thereby improving the energy efficiency and response speed of the entire system.

[0064] In another embodiment of the present application, the multi-channel signal transformer group also includes a remote monitoring module (not shown), which is connected to an external monitoring center through wireless communication technology. The remote monitoring module can transmit the operating data of the transformer group, such as voltage, current, temperature, etc., to the monitoring center in real time to realize remote diagnosis and maintenance of the transformer group. In addition, the remote monitoring module can also receive instructions from the monitoring center to remotely control and adjust the transformer group to adapt to different working environments and load changes.

[0065] In summary, the multi-channel signal transformer group provided in this application not only improves the performance and reliability of the transformer 200 by integrating a variety of advanced technologies and designs, but also enhances its intelligence and remote monitoring capabilities, meeting the strict requirements of modern electronic equipment for power management.

[0066] The multi-channel signal transformer group provided in this embodiment is widely used in the fields of transportation, communication, etc., such as power, signal, and control systems in transportation systems such as trams, subways, and railways; it plays an important role in equipment such as optical fiber transceivers; it is a link in the bidirectional AC data voltage signal chain in the transceiver, and when the signal passes through this link, it is inevitable that there will be some attenuation. Leakage inductance is an indicator to measure the degree of signal attenuation. For the same multi-channel signal transformer group, its degree of signal attenuation is related to the degree of coupling between the primary and secondary coils 230. The better the coupling, the smaller the leakage inductance and the less signal attenuation. The multi-channel signal transformer group is designed to use a magnetic core 210 with a ring structure with minimal magnetic leakage, and the winding is wound using a full cross winding method to achieve the minimum leakage inductance of the product and ultimately achieve a high-speed transmission effect of the product.

[0067] In this embodiment, two transformers 200 are provided as an example. Each transformer 200 has three primary lead-out terminals 221 and four secondary lead-out terminals 231. Figure 4 As shown, D1, D2, D3, E1, E2, and E3 are primary lead-out terminals 221, and D4, D5, D6, D7, E4, E5, E6, and E7 are secondary lead-out terminals 231. The electrical performance parameters of the multi-channel signal transformer group are shown in Table 1.

[0068] Table 1:

[0069]

[0070]

[0071] The multi-channel signal transformer group provided in this embodiment has a length, width and height of 15.8 mm, 7.2 mm and 3.8 mm respectively. As shown in Table 1, the transmission rate of the multi-channel signal transformer group can reach 512 Mb / s; therefore, the multi-channel signal transformer group provided in this embodiment has the characteristics of miniaturization, integration and high-speed transmission.

[0072] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A multi-channel signal transformer group, characterized in that: include: Insulation baseboard; A plurality of transformers are provided on the insulating base plate; the transformers include a magnetic core and a primary coil and a secondary coil wound on the magnetic core; the primary coil leads to a plurality of primary lead-out terminals through a center tap, and the secondary coil leads to a plurality of secondary lead-out terminals through a multi-path winding.

2. The multi-channel signal transformer group according to claim 1, characterized in that: The transformer is surface mounted on the insulating base plate.

3. The multi-channel signal transformer group according to claim 1, characterized in that: A plurality of primary pads and secondary pads are arranged on the insulating bottom plate, one of the primary lead-out terminals is welded on one of the primary pads, and one of the secondary lead-out terminals is welded on one of the secondary pads.

4. The multi-channel signal transformer group according to claim 3, characterized in that: The primary pad includes a Ni layer and an Au layer which are sequentially arranged from bottom to top.

5. The multi-channel signal transformer group according to claim 4, characterized in that: The structure of the secondary pad is the same as that of the primary pad.

6. The multi-channel signal transformer group according to claim 1, characterized in that: The insulating bottom plate is a ceramic plate.

7. The multi-channel signal transformer group according to claim 1, characterized in that: The magnetic core is a ring structure.

8. The multi-channel signal transformer group according to claim 1, characterized in that: The primary coil is a coil wound by a full cross winding method.

9. The multi-channel signal transformer group according to claim 1, characterized in that: The secondary coil is a coil wound by a full cross winding method.

10. The multi-channel signal transformer group according to any one of claims 1 to 9, characterized in that: The multi-channel signal transformer group also includes a heat sink, and the heat sink is fixed below the insulating bottom plate.

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