Novel differential and common mode inductor structure

Abstract

The utility model relates to the technical field of inductor manufacturing, in particular to a novel differential and common mode inductor structure which comprises an integrated framework and a differential and common mode inductor assembly. A plurality of U-shaped grooves are formed in the top of the integrated framework corresponding to the outer contour of a winding of the differential and common mode inductor assembly, pin through holes are formed in the bottoms of the U-shaped grooves corresponding to pins of the winding, and a protruding part is arranged on the outer edge of the bottom of the integrated framework along the bottom contour of the differential and common mode inductor assembly. When the top of the integrated framework and the bottom of the differential and common mode inductor assembly are installed in a buckled mode, the winding is embedded into the U-shaped groove, the pins penetrate through the pin through holes, and the bottom of the differential and common mode inductor assembly abuts against the top of the protruding part. The underlying part is arranged on the bottom surface of the integrated framework; the number of the U-shaped grooves is equal to that of the windings; therefore, the effects of few production procedures, convenience in disassembly and assembly and low cost are achieved.

Description

Technical Field

[0001] This utility model relates to the field of inductor manufacturing technology, and in particular to a novel differential common-mode inductor structure. Background Technology

[0002] With the rapid development of the photovoltaic industry, photovoltaic power plants are springing up everywhere, and the demand for photovoltaic inductors is increasing daily during the construction of these plants. Among them, three-phase differential mode inductors will play a greater role in medium-power and high-power photovoltaic power generation solutions. However, their manufacturing process is quite difficult, resulting in high costs.

[0003] For example, differential mode inductors with epoxy boards spliced ​​together to form a frame (such as...) Figure 1 As shown in the diagram, the base plate 100, spacer 200, U-shaped plate 300, and tin-through plate are all made of epoxy board. These epoxy board components are then assembled with other inductor components to form the skeleton supporting the differential mode inductor, which is then fastened to the inductor winding made of copper wire 400. This solution requires the individual molding and manufacturing of numerous components such as the base plate 100, spacer 200, U-shaped plate 300, and tin-through plate, and involves many assembly steps, resulting in long manufacturing time, high manpower and material resources, and high costs.

[0004] For example, Chinese patent application number 2010201298231 describes a common-mode inductor that uses a vertical frame as its main structure. Copper wire windings are symmetrically wound on the vertical frame, with two high-permeability magnetic cores inserted into the central through-hole. Magnetic core clips are snapped into the two high-permeability magnetic cores, and the power magnetic core is inserted into the power magnetic core slot and bonded to the two high-permeability magnetic cores, thus completing the assembly process. However, disassembling the inductor after directly winding it into a differential-mode or common-mode inductor using a vertical frame is very difficult. If copper wires are damaged or the insulation of the vertical frame is damaged, requiring disassembly and replacement, the entire inductor needs to be disassembled, which is very inconvenient. Utility Model Content

[0005] To address the aforementioned shortcomings, the purpose of this invention is to propose a novel differential common-mode inductor structure that features fewer production steps, ease of disassembly and assembly, and low cost.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The application discloses a novel differential common-mode inductor structure which comprises an integrated skeleton and a differential common-mode inductor component; a plurality of U-shaped grooves are arranged on the top of the integrated skeleton and correspond to the winding outer contour of the differential common-mode inductor component; a pin through hole is arranged on the bottom of the U-shaped groove and corresponds to the pin of the winding; a protruding part is arranged on the bottom outer edge of the integrated skeleton and along the bottom contour of the differential common-mode inductor component, so that when the top of the integrated skeleton and the bottom of the differential common-mode inductor component are buckled and mounted, the winding is embedded in the U-shaped groove, the pin passes through the pin through hole, and the bottom of the differential common-mode inductor component abuts against the top of the protruding part.

[0008] A pad part is arranged on the bottom surface of the integrated skeleton.

[0009] The number of the U-shaped grooves is equal to the number of the windings.

[0010] Further, the plurality of U-shaped grooves are arranged side by side from front to back on the top of the integrated skeleton, a front U-shaped groove and a rear U-shaped groove share a side groove side plate, the front side opening of the U-shaped groove located at the front side of the integrated skeleton, and the rear side opening of the U-shaped groove located at the rear side of the integrated skeleton.

[0011] Further, a fixing part through hole is arranged on the bottom of the integrated skeleton and corresponds to the fixing part of the differential common-mode inductor component.

[0012] The height of the protruding part exceeds the height of the fixing part protruding from the bottom surface of the differential common-mode inductor component.

[0013] Further, a protruding connecting part is arranged between the protruding part and the U-shaped groove, one end of the protruding connecting part is connected with the protruding part, the other end of the protruding connecting part is connected with the frame of the U-shaped groove, and the height of the protruding connecting part is equal to the height of the protruding part.

[0014] The protruding connecting part is arranged away from the fixing part through hole.

[0015] Further, the number of the protruding connecting parts is one less than the number of the windings, and the protruding connecting parts are arranged between adjacent two U-shaped grooves.

[0016] Further, the pad part is arranged at the fixing part through hole.

[0017] Further, when the fixing part through hole located at the left side of the integrated skeleton and the fixing part through hole located at the right side of the integrated skeleton are symmetrical, the pad part extends from the left side of the integrated skeleton to the right side of the integrated skeleton and is in a strip shape.

[0018] The technical solution provided by this utility model can include the following beneficial effects: Based on the structural characteristics of the differential and common mode inductor assembly, the integrated frame has multiple U-shaped grooves on its top corresponding to the outer contour of the winding of the differential and common mode inductor assembly to accommodate the winding. It integrates the features and functions of components such as U-shaped plates, base plates, and partitions. Then, pin through holes are opened at the bottom of the U-shaped grooves corresponding to the pins of the winding, allowing the pins to protrude outside the integrated frame, facilitating pin insertion into the PCB board and soldering. Finally, a protrusion is provided on the bottom outer edge of the integrated frame along the bottom contour of the differential and common mode inductor assembly, integrating the function of a pad to prevent unevenness of the bottom contour of the differential and common mode inductor assembly, which would cause it to not fit properly when inserted into the PCB board. Therefore, the integrated frame provides this support. The frame is reshaped to reshape the bottom surface, so that when the top of the integrated frame and the bottom of the differential / common mode inductor assembly are snapped together, the windings are embedded in the U-shaped slots, the pins pass through the pin through holes, and the bottom of the differential / common mode inductor assembly abuts against the top of the raised part. The assembly of the entire differential / common mode inductor can be completed in one installation step. Next, a pad is provided on the bottom surface of the integrated frame to replace the function of the solder plate, so that the pin soldering joint is suspended from the PCB board. During wave soldering, the solder can spread up to form a solder pile, and the contact between the pin and the PCB board is more stable. Secondly, the number of U-shaped slots is set to be equal to the number of windings, so that the integration of the integrated frame and the differential / common mode inductor assembly is better. This achieves the effect of fewer production steps, convenient disassembly and assembly, and low cost. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a differential mode inductor with a frame made of epoxy boards.

[0020] Figure 2 This is a schematic diagram of a novel differential common-mode inductor structure according to one embodiment of the present invention.

[0021] Figure 3 Is it like this? Figure 2 The diagram shows an assembly diagram of a novel differential common-mode inductor structure.

[0022] Figure 4 Is it like this? Figure 2 The integrated skeleton shown is a structural schematic diagram. Figure 1 .

[0023] Figure 5 Is it like this? Figure 2 The integrated skeleton shown is a structural schematic diagram. Figure 2 .

[0024] Among them: integrated frame 1, differential and common mode inductor assembly 2, U-shaped groove 11, pin through hole 12, protrusion 13, padding part 14, fixing part through hole 15, winding 21, pin 22, fixing part 23, and protruding connection part 131. Detailed Implementation

[0025] 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.

[0026] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. 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, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish and describe features, without any order or emphasis.

[0027] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] The following is combined Figures 1 to 5 This describes a novel differential common-mode inductor structure according to an embodiment of the present invention.

[0030] A novel differential-common mode inductor structure includes an integrated frame 1 and a differential-common mode inductor assembly 2. The top of the integrated frame 1 is provided with multiple U-shaped grooves 11 corresponding to the outer contour of the winding 21 of the differential-common mode inductor assembly 2. The bottom of the U-shaped grooves 11 is provided with pin through holes 12 corresponding to the pins 22 of the winding 21. The bottom outer edge of the integrated frame 1 is provided with a protrusion 13 along the bottom contour of the differential-common mode inductor assembly 2. When the top of the integrated frame 1 and the bottom of the differential-common mode inductor assembly 2 are fastened together, the winding 21 is embedded in the U-shaped grooves 11, the pins 22 pass through the pin through holes 12, and the bottom of the differential-common mode inductor assembly 2 and the top of the protrusion 13 abut against each other.

[0031] The bottom surface of the integrated frame 2 is provided with a raised part 14;

[0032] The number of the U-shaped grooves 11 is equal to the number of the windings 21.

[0033] In a preferred embodiment of the novel differential common-mode inductor structure, as shown in the drawings, Figure 2 and Figure 3 The differential common-mode inductor assembly 2 is generally wrapped with an insulating paper around the core, and then the copper wire is wound around the core wrapped with the insulating paper to form the winding 21, thereby forming the inductor winding. The differential mode inductor and the common mode inductor are only different in winding method, but the appearance of the winding 21 is basically the same. If the differential common-mode inductor assembly 2 is composed of multiple inductors, the cores of the multiple inductors can be fixed together to form the assembly. Therefore, according to the structural characteristics of the differential common-mode inductor assembly 2, a plurality of U-shaped grooves 11 corresponding to the outer contour of the winding 21 of the differential common-mode inductor assembly 2 are arranged on the top of the integrated skeleton 1 to accommodate the winding 21, which integrates the features and functions of the U-shaped plate, the bottom plate, the partition plate and the like. Then, the pin through hole 12 is opened at the bottom of the U-shaped groove 11 corresponding to the pin 22 of the winding 21, so that the pin 22 is exposed outside the integrated skeleton 1, which is convenient for inserting and soldering the pin into the PCB board. Finally, the protruding part 13 is arranged along the bottom contour of the differential common-mode inductor assembly 2 at the outer edge of the bottom of the integrated skeleton 1, which integrates the function of the pad and avoids the uneven bottom contour of the differential common-mode inductor assembly 2, so that the differential common-mode inductor assembly 2 is not fitted when the PCB board is inserted, so the pad is lifted and the bottom surface is reshaped by the integrated skeleton 2. Thus, when the top of the integrated skeleton 1 and the bottom of the differential common-mode inductor assembly 2 are fitted and installed, the winding 21 is embedded in the U-shaped groove 11, the pin 22 passes through the pin through hole 12, the bottom of the differential common-mode inductor assembly 2 abuts against the top of the protruding part 13, and the whole assembly of the differential common-mode inductor can be completed in one installation process. Then, the lifting part 14 is arranged on the bottom surface of the integrated skeleton 2 to replace the function of the tin plate, so that the pin 22 soldering part is suspended with the PCB board, the soldering tin can be spread when wave soldering, the tin pile is formed, and the contact between the pin 22 and the PCB board is more stable. Secondly, the number of the U-shaped grooves 11 is equal to the number of the windings 21, so that the integrated degree of the integrated skeleton 1 and the differential common-mode inductor assembly 2 is better after being embedded. In summary, the integrated skeleton 1 integrates most of the functions of the inductor components and is integrally formed, which greatly reduces the production process, labor cost and manufacturing cost while ensuring the performance of the product. In addition, when the insulating paper and copper wire are damaged, the differential common-mode inductor assembly 2 can be directly disassembled and replaced, which is convenient for maintenance.

[0034] Further, the plurality of U-shaped grooves 11 are arranged side by side from front to back on the top of the integrated skeleton 1. The front U-shaped groove 11 and the rear U-shaped groove 11 share a side groove side plate. The front side opening of the U-shaped groove 11 located at the most front side of the integrated skeleton 1, and the rear side opening of the U-shaped groove 11 located at the most rear side of the integrated skeleton 1.

[0035] In this embodiment, as shown in the drawings, Figure 4As shown, the inductance windings in the differential common-mode inductance assembly 2 are mostly arranged side by side, so according to this feature, a plurality of U-shaped grooves 11 are arranged side by side from front to back on the top of the integrated skeleton 1, and a front U-shaped groove 11 shares a side groove side plate with a rear U-shaped groove 11, which reduces the material while using the shared groove side plate to isolate two adjacent windings 21, avoiding contact to cause short circuit; then the front side opening of the U-shaped groove 11 located at the front side of the integrated skeleton 1 and the rear side opening of the U-shaped groove 11 located at the rear side of the integrated skeleton 1, which reduces the material while increasing the heat dissipation area of the winding 21.

[0036] Further, the bottom of the integrated skeleton 1 is provided with a fixing member through hole 15 corresponding to the fixing member 23 of the differential common-mode inductance assembly 2;

[0037] The height of the protruding part 13 exceeds the height of the fixing member 23 protruding from the bottom surface of the differential common-mode inductance assembly 2.

[0038] In this embodiment, when fixing the inductance winding of the differential common-mode inductance assembly 2, the core often needs to be fixed, so there must be a fixing member 23. According to the mounting relationship between the differential common-mode inductance assembly 2 and the integrated skeleton 1, the winding 21 needs to be placed by being embedded in the U-shaped groove 11, and the pin 22 passes through the pin through hole 12, so the core is in parallel relationship with the bottom surface of the integrated skeleton 1. Therefore, when the connecting plate connects a plurality of cores and is fixed by the fixing member 23, the fixing member 23 is in vertical relationship with the bottom surface of the integrated skeleton 1. Therefore, the head of the fixing member 23 (similar to the head of a screw) will protrude from the bottom surface of the differential common-mode inductance assembly 2, so the height of the protruding part 13 needs to exceed the height of the fixing member 23 protruding from the bottom surface of the differential common-mode inductance assembly 2 (similar to the height of the head of a screw), so that the integrated skeleton 1 and the differential common-mode inductance assembly 2 cannot be tightly buckled during installation, the protruding part 13 cannot abut against the bottom of the differential common-mode inductance assembly 2, resulting in a loose installation relationship. In addition, the fixing member 23 needs to be operated, so that the installer can operate without disassembling the integrated skeleton 1, so the fixing member through hole 15 needs to be provided on the bottom of the integrated skeleton 1 corresponding to the fixing member 23, and the principle is similar to that of a screwdriver passing through the fixing member through hole 15 to tighten the screw (fixing member 23).

[0039] Further, the protruding part 13 and the U-shaped groove 11 are further provided with a protruding connecting part 131, one end of the protruding connecting part 131 is connected with the protruding part 13, and the other end of the protruding connecting part 131 is connected with the frame of the U-shaped groove 11, and the height of the protruding connecting part 131 is equal to the height of the protruding part 13.

[0040] The protruding connecting part 131 is arranged away from the fixing member through hole 15.

[0041] In this embodiment, when the differential common-mode inductor assembly 2 has a relatively large volume, the protruding portion 13 at the outer edge of the integrated skeleton 1 may be bent and the differential common-mode inductor assembly 2 may be biased, so as to improve the stability of the differential common-mode inductor assembly 2, a protruding connecting portion 131 is further arranged between the protruding portion 13 and the U-shaped groove 11, one end of the protruding connecting portion 131 is connected with the protruding portion 13, the other end of the protruding connecting portion 131 is connected with the frame of the U-shaped groove 11, and the height of the protruding connecting portion 131 is equal to the height of the protruding portion 13; the protruding connecting portion 131 can provide support force for the differential common-mode inductor assembly 2 and conduct pressure from the protruding portion 13 at the same time, so as to disperse the pressure and prevent the protruding portion 13 and the protruding connecting portion 131 from being bent; it should be noted that the protruding connecting portion 131 needs to avoid the fixing member through hole 15 to prevent the fixing member through hole 15 from penetrating through the protruding connecting portion 131 and breaking the pressure conduction.

[0042] Further, the number of the protruding connecting portion 131 is one less than the number of the winding 21, and the protruding connecting portion 131 is arranged between the two adjacent U-shaped grooves 11.

[0043] In this embodiment, in order to effectively support the important components of the differential common-mode inductor assembly 2, i.e. the inductor winding, the number of the protruding connecting portion 131 is set to be one less than the number of the winding 21, and the protruding connecting portion 131 is arranged between the two adjacent U-shaped grooves 11, so that the inductor winding is supported by the protruding portion 13 and the protruding connecting portion 131 around.

[0044] Further, the pad portion 14 is arranged at the fixing member through hole 15.

[0045] In this embodiment, as shown in Figure 5 the fixing through hole 15 corresponds to the fixing member 23, the fixing member 23 is often fixed in the middle of the iron core, and the copper wire is wound around the iron core and then led out from the two sides of the iron core to form the pin 22, so the fixing through hole 15 and the pin through hole 12 corresponding to the pin 22 are misaligned, and the pin through hole 12 is generally located on both sides of the fixing through hole 15, so the pad portion 14 is arranged at the fixing member through hole 15 to avoid the pin through hole 12, so that the lifting point of the integrated skeleton 1 is not located at the pin through hole 12, when the pin 22 is welded, there is no gap between the integrated skeleton 1 and the PCB, and tin cannot be formed at the pin 22, so that the pin 22 cannot be stably welded.

[0046] Further, when the fixing member through hole 15 on the left side of the integrated skeleton 1 is symmetrical with the fixing member through hole 15 on the right side of the integrated skeleton 1, the pad portion 14 extends from the left side of the integrated skeleton 1 to the right side of the integrated skeleton 1 in a strip shape.

[0047] In the embodiment, if the plurality of inductor windings in the differential common mode inductor assembly 2 are fixed by the fixing member 23 from both ends of the core, the fixing member through hole 15 on the left side of the integrated skeleton 1 and the fixing member through hole 15 on the right side of the integrated skeleton 1 will be symmetrically arranged, so the pad part 14 can be arranged in a long strip shape from the left side of the integrated skeleton 1 to the right side of the integrated skeleton 1 without affecting the pin through hole 12, and the PCB can provide more support force for the integrated skeleton 1.

[0048] Other configurations and operations of the novel differential common mode inductor structure according to the embodiments of the present application are known to those skilled in the art, and will not be described in detail here.

[0049] In the description of the present specification, the description referring to the terms "embodiment", "example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0050] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A novel differential common mode inductance structure characterized by: The integrated skeleton and the differential common mode inductor assembly are provided with a plurality of U-shaped grooves on the top of the integrated skeleton corresponding to the winding outer contour of the differential common mode inductor assembly, the bottom of the U-shaped groove is provided with a pin through hole corresponding to the pin of the winding, the bottom outer edge of the integrated skeleton is provided with a protruding part along the bottom contour of the differential common mode inductor assembly, so that when the top of the integrated skeleton and the bottom of the differential common mode inductor assembly are buckled and installed, the winding is embedded in the U-shaped groove, the pin passes through the pin through hole, and the bottom of the differential common mode inductor assembly and the top of the protruding part abut. The bottom surface of the integrated skeleton is provided with a raised part. The number of the U-shaped grooves is equal to the number of the windings.

2. A novel differential common mode inductor structure as claimed in claim 1, wherein: A plurality of U-shaped grooves are arranged side by side from front to back on the top of the integrated skeleton, a front U-shaped groove and a rear U-shaped groove share a side groove side plate, the front side opening of the U-shaped groove located at the front side of the integrated skeleton, and the rear side opening of the U-shaped groove located at the rear side of the integrated skeleton.

3. A novel differential common mode inductor structure as claimed in claim 1, wherein: The bottom of the integrated skeleton is provided with a fixing part through hole corresponding to the fixing part of the differential common mode inductor assembly. The height of the protruding part exceeds the height of the fixing part protruding from the bottom surface of the differential common mode inductor assembly.

4. A novel differential common mode inductor structure as claimed in claim 3, wherein: The protruding part and the U-shaped groove are further provided with a protruding connecting part, one end of the protruding connecting part is connected with the protruding part, the other end of the protruding connecting part is connected with the frame of the U-shaped groove, and the height of the protruding connecting part is equal to the height of the protruding part. The protruding connecting part is arranged away from the fixing part through hole.

5. A novel differential common mode inductor structure as claimed in claim 4, wherein: The number of the protruding connecting parts is less than the number of the windings by one, and the protruding connecting parts are arranged between adjacent two U-shaped grooves.

6. A novel differential common mode inductor structure as claimed in claim 3, wherein: The raised part is arranged at the fixing part through hole.

7. A novel differential common mode inductor structure as claimed in claim 6, wherein: When the fixing part through hole located on the left side of the integrated skeleton and the fixing part through hole located on the right side of the integrated skeleton are symmetrical, the raised part extends from the left side of the integrated skeleton to the right side of the integrated skeleton in a strip shape.

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