Split type common mode inductor and circuit controller
Through the split common mode inductor structure, the closed magnetic circuit is decomposed into independent inductors, which solves the problems of low yield and poor consistency of devices in the prior art, and achieves the improvement of automated production and electrical performance.
Patent Information
- Application Number
- CN202422014732.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-19
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-08-19
AI Technical Summary
The existing magnetic circuit structure of common mode inductors leads to low yield, low production efficiency, high labor costs, and poor consistency between the two sets of coils of the device, affecting electrical performance.
The split common mode inductor structure is adopted to decompose the closed magnetic circuit into two independent discrete inductors, with the opposite winding directions, and the shell and positioning structure are used to achieve automated production, reducing magnetic leakage and electromagnetic interference through magnetic or non-magnetic material shells.
It simplifies the difficulty of automated production, improves the winding consistency and yield of the device, reduces production costs, reduces electromagnetic interference, and ensures electrical performance.
Smart Images
Figure CN223180946U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of communication equipment, and particularly relates to a split common-mode inductor and a circuit controller. Background Art
[0002] In an electronic circuit, a common-mode inductor plays an important role in reducing noise, improving performance, and ensuring accurate signal transmission. It is mainly applied to power lines such as AD / DC converters and switching power supplies, data transmission lines such as USB, Ethernet, and HDMI, and motor control circuits to reduce electromagnetic interference or suppress common-mode interference caused by noise.
[0003] Nowadays, common common-mode inductors can ensure a closed magnetic circuit structure during normal operation. However, for actual production, the integrated magnetic circuit structure of a magnetic ring-like shape will lead to a decrease in the yield of devices, an increase in labor costs, low production efficiency, and an increase in the proportion of manually completed devices will inevitably result in poor consistency between the two sets of coils of the final device and poor common-mode balance. This causes a certain gap between the performance of the device and the theoretical design value, resulting in the need to further increase production costs to ensure the electrical performance of the device. Summary of the Utility Model
[0004] Aiming at the problems existing in the prior art, the utility model provides a split common-mode inductor and a circuit controller, which can reduce the difficulty of automatic production of the device while ensuring the consistency of the two windings of the device.
[0005] The utility model is realized through the following technical solutions:
[0006] A split common-mode inductor includes a housing and a plurality of discrete inductors arranged inside it. The magnetic circuits of the plurality of discrete inductors form a complete closed magnetic circuit; the discrete inductor includes a winding window core and electrode cores arranged at both ends thereof, and a winding coil is wound around the winding window core.
[0007] Preferably, an electrode groove is provided on the electrode core, the bottom surface of the electrode groove is flush with the surface of the winding window core, an electrode layer is provided on the surface of the electrode groove, and the lead of the winding coil is connected to the electrode layer.
[0008] Preferably, the housing is made of a magnetic material or a non-magnetic material.
[0009] Preferably, the number of the plurality of discrete inductors is two, and the two discrete inductors are arranged in parallel splicing and the winding directions of the corresponding winding coils are opposite.
[0010] Preferably, a first positioning structure is provided between the electrode cores of the two discrete inductors, including a convex structure and a concave structure cooperating therewith. The convex structure and the concave structure are respectively disposed on the side walls of the two electrode cores and are located on the side close to the other discrete inductor.
[0011] Preferably, a second positioning structure is provided between the housing and the electrode core of the discrete inductor.
[0012] Preferably, the second positioning structure includes a guide groove and a guide block. The guide groove is disposed on the inner side wall of the housing or the outer side wall of the electrode core. The guide groove is vertically disposed and penetrates through the upper end. The guide block is correspondingly disposed on the outer side wall of the electrode core or the inner wall of the housing.
[0013] Preferably, there is an adhesive layer in the contact area between the discrete inductor and the housing, and / or between the two discrete inductors.
[0014] A circuit controller includes the split common-mode inductor.
[0015] Preferably, the circuit controller is an AD / DC converter, a switching power supply controller, a motor controller or a signal controller.
[0016] Compared with the prior art, the present utility model has the following beneficial technical effects:
[0017] The present utility model provides a split common-mode inductor, including a housing and two independent discrete inductors embedded therein. The winding directions of the coils on the two inductors are opposite. The completely closed magnetic circuit is decomposed into two independent discrete inductors, and each discrete inductor is wound separately, which simplifies the winding method of the coil and has a lower requirement for automated production. It can ensure the consistency of the two windings of the device while ensuring automated production. At the same time, it can reduce the magnetic leakage phenomenon of the device during actual operation, improve the actual performance of the device and ensure that it will not cause significant electromagnetic interference to surrounding devices. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 is a schematic diagram of the core structure of the split common-mode inductor structure of the present utility model;
[0019] Figure 2 is a structural diagram of the housing of the split common-mode inductor structure of the present utility model;
[0020] Figure 3 is the core part of the discrete inductor in the split common-mode inductor structure of the present utility model;
[0021] Figure 4 is the core part of the split common-mode inductor body in the split common-mode inductor structure of the present utility model;
[0022] Figure 5 This is the cross-section of the winding magnetic core in the split common-mode inductor structure of the present utility model;
[0023] Figure 6 This is the structural diagram of the discrete inductor in the split common-mode inductor structure of the present utility model;
[0024] Figure 7 This is the schematic diagram after the assembly of the split common-mode inductor of the present utility model;
[0025] Figure 8 This is the electrical connection diagram of the split common-mode inductor of the present utility model;
[0026] Figure 9 This is the three-dimensional diagram of the split common-mode inductor designed by the present utility model.
[0027] In the figure, 1 - housing, 2 - discrete inductor, 3 - winding window magnetic core, 4 - first electrode magnetic core, 5 - second electrode magnetic core, P1 - first electrode, P2 - second electrode, W1 - winding coil, G1 - first groove, G2 - second groove, G3 - third groove, B1 - first protrusion, B2 - second protrusion, B3 - third protrusion, B4 - fourth protrusion, B5 - fifth protrusion. Specific embodiments
[0028] The following further describes the present utility model in detail with reference to the accompanying drawings, which is an explanation rather than a limitation of the present utility model.
[0029] A split common-mode inductor includes a housing and a plurality of discrete inductors arranged inside it, and the magnetic circuits of the plurality of discrete inductors form a complete closed magnetic circuit; the discrete inductor includes a winding window magnetic core and electrode magnetic cores arranged at both ends thereof, and a winding coil is wound on the winding window magnetic core.
[0030] Refer to Figure 1 , a split common-mode inductor includes a housing 1 and a common-mode inductor body arranged inside it; the common-mode inductor body serves as a coil winding window and includes two laterally spliced discrete inductors 2. The discrete inductor 2 includes a winding window magnetic core 3 and a first electrode magnetic core 4 and a second electrode magnetic core 5 arranged at both ends thereof. A winding coil W1 is wound on the winding window magnetic core 3, and the winding coils W1 on the two discrete inductors 2 are wound in opposite directions.
[0031] In some embodiments, a cavity for installing the common-mode inductor body is formed in the housing, the common-mode inductor body is installed in the cavity, the housing is a structure with an open top and through both ends, that is, a U-shaped structure, and the common-mode inductor body is embedded and positioned in the housing to protect the coil from external force damage from above and to close the magnetic circuit.
[0032] Such as Figure 2As shown, it is the housing of a split common mode inductor. In a surface mount common mode inductor, this is a rectangular thin sheet, usually made of the same material as the magnetic core body. As part of the magnetic circuit, it serves the purpose of protecting the coil from external forces above and closing the magnetic circuit. For common mode inductors similar to other structures, their magnetic circuits are closed during normal operation and do not require additional components to complete the magnetic circuit to improve the electrical performance of the device. However, a completely closed magnetic circuit will further increase the difficulty of automatic winding, resulting in a lower yield of the device, an increase in labor costs, and low production efficiency. The increase in the proportion of devices completed manually will also inevitably lead to poor consistency between the two sets of coils of the final device and poor common mode balance. Therefore, the split common mode inductor of this application opens the originally closed structure and turns it into two discrete inductors with the same magnetic core structure but opposite coil winding directions and installation directions. This greatly reduces the difficulty of automatic winding and reduces the investment in the production line during the automatic winding process.
[0033] Therefore, correspondingly, the housing that was originally part of the magnetic circuit is optimized to Figure 2 the U-shaped housing in [reference], which includes a bottom plate and side plates provided at both ends and extending upward to form the housing together, ensuring the close contact of the two discrete inductors in the split common mode inductor structure and ensuring that the coil will not be damaged due to external forces during production and use.
[0034] In some embodiments, the housing is made of magnetic or non-magnetic materials.
[0035] The magnetic housing can greatly reduce the magnetic leakage of the device and reduce the electromagnetic interference to surrounding devices during normal operation of the device. The non-magnetic housing, such as a non-magnetic housing mainly made of plastic or other materials, serves the purpose of enhancing the external mechanical strength of the device.
[0036] In some embodiments, first positioning structures are provided at both ends of the two discrete inductors 2 to ensure the accuracy of the installation of the two discrete inductors 2 during the automatic production process.
[0037] The positioning structures are provided on the first pole magnetic core 4 and the second electrode magnetic core 5. The positioning structure includes a convex structure and a concave structure that cooperates with it. The convex structure and the concave structure are respectively provided on the first pole magnetic core 4 and the second electrode magnetic core 5 and are located on the side close to the other discrete inductor 2. During installation and positioning, the convex structure of the first discrete inductor is set in the concave structure of the second discrete inductor, and the concave structure of the first discrete inductor is set in the convex structure of the second discrete inductor, so as to achieve the positioning of the two discrete inductors. At the same time, the structures of the two discrete inductors are kept consistent to avoid inconsistent discrete inductor structures caused by the positioning structure, which requires processing two types of discrete inductor magnetic cores and increases the production cost.
[0038] In some embodiments, the concave structure is a vertical groove provided on the side wall of the electrode core, the groove vertically penetrates the side wall of the electrode core, and the convex structure is a positioning block provided on another electrode core.
[0039] The cross-section of the vertical groove is a trapezoidal groove, and the positioning block is a trapezoidal positioning block that cooperates with the trapezoidal groove. During the production process, by matching the trapezoidal grooves of the two discrete inductors with the trapezoidal positioning blocks, the positioning and installation of the two discrete inductors can be achieved.
[0040] In some embodiments, a second positioning structure is provided between the side wall of the discrete inductor and the housing. Through the second positioning structure, the accurate and rapid installation of the discrete inductor and the housing can be achieved to ensure the accuracy of the installation during the automated production process.
[0041] The second positioning structure includes a guiding groove and a guiding block. The guiding groove is provided on the inner side wall of the housing or the outer side wall of the electrode core (the side close to the housing), the guiding groove is vertically arranged and penetrates the upper end, and the guiding block is correspondingly provided on the outer side wall of the electrode core or the inner wall of the housing.
[0042] The second positioning structure can be one or two. The second positioning structure is provided on any one of the electrode cores, or the second positioning structure is provided on both of the two electrode cores. Preferably, the second positioning structure is the same as the first positioning structure. Four protrusions for determining the installation position are added on the inner side of the side wall of the housing. During the automatic production process, by identifying the positions of the protrusions, the installation accuracy and success rate of the housing can be improved to a certain extent, and the yield rate of the device can be effectively improved.
[0043] Refer to Figure 4 , two discrete inductors 2 with the same magnetic core structure but opposite winding directions are spliced in opposite directions. Therefore, the magnetic core is processed in the form of the magnetic core of a single discrete inductor during the automated production process, which greatly reduces the production cost of the device during automated production. A trapezoidal protrusion and a trapezoidal groove are provided on one side of the discrete inductor as the positioning grooves during the splicing process of the two identical discrete inductors to ensure the accuracy of the device during the automated assembly process. And two trapezoidal grooves are provided on the other side, and their positions correspond to the two trapezoidal protrusions provided on the side wall of the housing in Figure 3 as the positioning grooves during the process of assembling the housing of the device. Figure 2 In some embodiments, the contact area between the discrete inductor and the housing, and / or the two discrete inductors are adhesively bonded.
[0044] The discrete inductor and the housing are bonded together by a magnetic core adhesive, and the contact areas between the two discrete inductors are bonded by an adhesive to improve the structural strength of the entire common mode inductor. The thickness of the adhesive is preferably 5 - 50um.
[0045] The discrete inductor and the housing are bonded together by a magnetic core adhesive, and the contact areas between the two discrete inductors are bonded by an adhesive to improve the structural strength of the entire common mode inductor. The thickness of the adhesive is preferably 5 - 50um.
[0046] In some embodiments, the edge chamfering treatment of the winding window core of the discrete inductor is used to protect the coil.
[0047] The discrete inductor includes a winding window core, and first and second electrode cores connected to the winding window core and having electrode groove portions. For the winding window core, it is set as a Figure 4 rectangular window as shown, and rounded corners are made. Its window cross-sectional area is in the range of 1-4 mm 2 to ensure the simplicity of the mold during the production of the device and at the same time ensure that the coil will not be damaged by sharp edges during the winding process, resulting in the failure of the insulation layer. While reducing the production cost of the core, the yield rate of the device is improved.
[0048] In some embodiments, the window core 3, the first electrode core 4, and the second electrode core 5 form an I-shaped structure. Electrodes are provided on the two electrode cores for connecting the lead ends of the winding coil. An electrode groove is provided at the top of the electrode core, and the bottom surface of the electrode groove is flush with the winding window core 3. The lead ends of the winding coil W1 are arranged in the lead groove.
[0049] The electrode groove is a trapezoidal groove. The electrode part on the discrete inductor is set in the form of a trapezoidal groove, which not only ensures that the coil on the device will not climb through a large slope during the winding process and leaves a deformable space with a large space, but also ensures the accuracy of the coil positioning during the winding process. For the winding, its two ends are connected to the electrodes, and the winding direction can be clockwise or counterclockwise. It only needs to ensure that the winding directions of the windings on a set of spliced discrete inductors are opposite during winding.
[0050] Embodiment 1
[0051] A split common-mode inductor includes a housing 1 and a common-mode inductor body. The common-mode inductor body is composed of two identical discrete inductors 2. The core of the discrete inductor 2 includes a winding window core 3 for winding the winding and first and second electrode cores 4 and 5 provided at both ends thereof. First electrodes P2 and second electrodes P1 with trapezoidal electrode groove structures are provided on the top surfaces of the first electrode core 4 and the second electrode core 5. A winding coil W1 is wound on the winding window core 3, and the winding directions of the winding coils W1 on the two discrete inductors 2 are opposite.
[0052] The first electrode P2 and the second electrode P1 are arranged in the form of trapezoidal wire grooves, which not only ensure that the winding coil W1 can be successfully positioned with the coil and the electrode after winding, but also ensure a small height difference between the electrode position and the winding window, reducing the final deformable space of the coil, reducing the coil damage caused by huge deformation of the coil after being subjected to external forces, and effectively improving the yield rate of the device. For the winding W1 wound on the winding window core 3, the winding directions of the windings of the two discrete inductors of the split common-mode inductor are opposite, which can ensure the actual electrical function of the common-mode inductor. And the two groups of coils are respectively wound on two winding window cores. Therefore, there is no restriction on the actual winding method of the winding, and only the winding directions need to be opposite.
[0053] The common-mode inductor includes two identical discrete inductors 2. This structure is used to complete the automatic winding of the core and splicing after the coil winding is completed, ensuring the closed structure of the magnetic circuit when it is put into use, so as to ensure the realization of its automatic production and the original electrical performance.
[0054] As Figure 3 shown, it is a schematic diagram of the discrete inductor 2 in the split winding core structure. Regarding the problems of automatic winding and automatic splicing of the two discrete inductors 2 during the production process, the two discrete inductors 2 are respectively the first discrete inductor and the second discrete inductor. On one side of the second electrode core 5 of the first discrete inductor, a trapezoidal first groove G1 is provided, and on one side of the first electrode core 4 of the first discrete inductor, a trapezoidal first protrusion B1 is provided for the positioning of the two cores during the splicing process, and to ensure that the processes of the two cores are completely consistent during actual production and winding, so as to ensure a high degree of consistency between the components of the device.
[0055] On the other side of the second electrode core 5 of the first discrete inductor, a trapezoidal second groove G2 is provided, and on one side of the first electrode core 4 of the first discrete inductor, a trapezoidal third groove G3 is provided for the accurate positioning of the housing during actual installation with the discrete inductor.
[0056] Refer to Figures 6 - 9 , the housing can be made of magnetic material or non-magnetic material. The specific structures of the two housings are both Figure 2 kept consistent, with a thickness between 0.4 mm and 1.5 mm, in a U shape. On the inner sides of the two side walls of the housing, second protrusions B2, third protrusions B3, fourth protrusions B4, and fifth protrusions B5 are respectively provided for the accurate positioning of the assembly process of the housing and the discrete inductor, ensuring the accurate assembly of the device during actual production, and protecting the coil from structural damage caused by external impact during production and use. The housing is bonded to the two discrete inductors and between the two discrete inductors by a core binder, and the thickness of the core binder is preferably 5 - 50 um.
[0057] For the magnetic core housing, its material is the same as that of the magnetic core part of the discrete inductor. Such a magnetic housing can greatly reduce the magnetic leakage of the device and reduce the electromagnetic interference to surrounding devices during the normal operation of the device. For the non-magnetic core housing, the magnetic housing can be changed to a non-magnetic housing mainly made of plastic or other materials to enhance the external mechanical strength of the device.
[0058] Embodiment 2
[0059] An AD / DC converter includes the above-mentioned split common-mode inductor.
[0060] Embodiment 3
[0061] A switching power supply includes the above-mentioned split common-mode inductor.
[0062] Embodiment 4
[0063] An electric motor controller includes the above-mentioned split common-mode inductor.
[0064] Embodiment 5
[0065] A signal transmission controller includes the above-mentioned split common-mode inductor.
[0066] The utility model discloses a split common-mode inductor, the structure of which mainly consists of a split common-mode inductor body and a housing. This structure effectively reduces the operation difficulty of such a common-mode inductor during automatic winding and automatic assembly, greatly improves the economic benefits of device production and reduces the labor cost.
[0067] The above content is only to illustrate the technical idea of the utility model, and the protection scope of the utility model cannot be limited thereby. Any modification made on the basis of the technical solution according to the technical idea proposed by the utility model falls within the protection scope of the claims of the utility model.
Claims
1. A split common mode inductor, characterized in that, It includes a housing and a plurality of discrete inductors arranged inside it. The magnetic circuits of the plurality of discrete inductors form a complete closed magnetic circuit. The discrete inductor includes a winding window core and electrode cores arranged at both ends thereof, and a winding coil is wound on the winding window core.
2. The split common mode inductor according to claim 1, wherein, An electrode groove is provided on the electrode core. The bottom surface of the electrode groove is flush with the surface of the winding window core, and an electrode layer is provided on the surface of the electrode groove. The lead of the winding coil is connected to the electrode layer.
3. The split common-mode inductor according to claim 1, wherein, The housing is made of a magnetic material or a non-magnetic material.
4. A split common mode inductor according to any one of claims 1-3, characterized in that, The plurality of discrete inductors are two, and the two discrete inductors are arranged in parallel splicing and the winding directions of the corresponding winding coils are opposite.
5. The split common mode inductor according to claim 4, wherein A first positioning structure is provided between the electrode cores of the two discrete inductors, including a convex structure and a concave structure cooperating with it. The convex structure and the concave structure are respectively arranged on the side walls of the two electrode cores and are located on the side close to the other discrete inductor.
6. The split common-mode inductor according to claim 1 or 5, characterized in that, A second positioning structure is provided between the housing and the electrode core of the discrete inductor.
7. The split common mode inductor according to claim 6, wherein The second positioning structure includes a guide groove and a guide block. The guide groove is provided on the inner side wall of the housing or the outer side wall of the electrode core. The guide groove is vertically arranged and penetrates through the upper end. The guide block is correspondingly arranged on the outer side wall of the electrode core or the inner wall of the housing.
8. A split common mode inductor according to any one of claims 1 - 3, 7, characterized in that, There is an adhesive layer in the contact area between the discrete inductor and the housing, and / or between the two discrete inductors.
9. A circuit controller, characterized in that, It includes the split common-mode inductor according to any one of claims 1-8.
10. A circuit controller according to claim 9, characterized in that, The circuit controller is an AD / DC converter, a switching power supply controller, a motor controller or a signal controller.