Penetration type vehicle-mounted common-mode filter inductor

Abstract

The utility model relates to the technical field of inductors, in particular to a penetrating type vehicle-mounted common-mode filter inductor which comprises a base, a magnetic core shell and a magnetic core, the magnetic core shell and the base are of an integrated shell structure, the magnetic core is embedded and installed in the magnetic core shell, winding of a coil is omitted, the size of the inductor is reduced, a penetrating type structure is adopted, and the size of the inductor is reduced. According to the inductor, the copper bar penetrates through the magnetic core to be connected with the copper bar terminal, the capacitor and the grounding copper bar are integrated in the base, the base can provide insulation protection for the grounding copper bar and the capacitor, winding of a coil is omitted, and therefore the inductor is simpler in overall structure, smaller in size and free of large installation space.

Description

Technical Field

[0001] The utility model relates to the technical field of inductors, in particular to a penetration-type vehicle-mounted common-mode filtering inductor. Background Art

[0002] For the embedded vehicle-mounted common-mode filter inductors, most of them are still based on annular magnetic cores, and the overall volume of the inductor is relatively large, and a coil usually needs to be wound on the annular magnetic core; and the existing inductors usually have a split shell and a split magnetic core, which is relatively troublesome to process and assemble.

[0003] Therefore, it is necessary to design a vehicle-mounted common-mode filter inductor with smaller size and higher integrity. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a penetration-type vehicle-mounted common-mode filter inductor with a higher degree of integration, higher structural strength, simpler assembly and processing, and smaller size.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A penetration-type vehicle-mounted common-mode filter inductor comprises a base, a magnetic core and a copper busbar. The magnetic core is provided with a magnetic core shell, and the magnetic core shell and the base are an integrated structure. The magnetic core shell is arranged on one side of the base, and a copper busbar terminal is arranged on the base. The copper busbar is connected to the copper busbar terminal and the copper busbar is penetrated by the magnetic core. Grounding copper buses are also arranged on both sides of the bottom of the base for connecting the bottom line.

[0007] Optionally, in one embodiment of the present invention, the magnetic core is a racetrack-shaped structure.

[0008] Optionally, in an embodiment of the utility model, one side of the magnetic core shell is an open structure, and the magnetic core shell is provided with a racetrack-shaped groove matching the magnetic core, and the depth of the groove is greater than the thickness of the magnetic core.

[0009] Optionally, in an embodiment of the present invention, the outward side of the magnetic core is coated with thermally conductive silicone.

[0010] Optionally, in an embodiment of the utility model, the copper bus terminal is fixedly mounted on the top surface of the base and is located within the inner diameter range of the magnetic core, and the copper bus terminal is provided with a connecting portion, which passes through the base and is led out from the bottom of the base.

[0011] Optionally, in an embodiment of the utility model, the copper bus terminal and the grounding copper bus are both provided with fixing holes penetrating the base, which are used to fix the copper bus terminal, the grounding copper bus and the base.

[0012] Optionally, in an embodiment of the utility model, a protruding limiting structure is provided on the top of the magnetic core shell and the top of the base opposite to the magnetic core shell.

[0013] Optionally, in an embodiment of the present invention, capacitors are respectively provided on both sides of the base and the capacitors are electrically connected to the copper busbar terminals.

[0014] Optionally, in an embodiment of the utility model, the bottom of the magnetic core shell and the base are both provided with reinforcing ribs, the reinforcing ribs of the base are in a honeycomb structure, and the reinforcing ribs at the bottom of the magnetic core shell are in a grid structure.

[0015] Beneficial effects of the utility model

[0016] The wear-through vehicle-mounted common-mode filter inductor of the utility model has a simple overall structure. The magnetic core adopts an integrated racetrack-shaped magnetic core, and the inductor itself adopts a wear-through structure. There is no need to wind a coil on the magnetic core, so the volume of the inductor can be reduced. The magnetic core shell and the base are an integrated structure, and there is no need to design other connection structures for connection between the shells. The integration of the inductor is higher and is conducive to reducing the volume. The assembly and processing steps are fewer and the assembly and processing are simpler. In addition, a space for accommodating a capacitor is provided on the base, thereby improving the space utilization rate of the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0018] Figure 1 The overall structure of the inductor of the first embodiment of the present invention is shown in FIG. Figure 1 ;

[0019] Figure 2 The overall structure of the inductor of the first embodiment of the present invention is shown in FIG. Figure 2 ;

[0020] Figure 3 The overall structure of the inductor of the first embodiment of the present invention is shown in FIG. Figure 3 ;

[0021] Figure numerals: base 1, magnetic core shell 2, thermal conductive silicone 201, limiting structure 3, copper bus terminal 4, positioning column 5, capacitor 6, grounding copper bus 7, reinforcing rib 8. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element 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 invention.

[0024] 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. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0028] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments. Example

[0029] In order to meet the design requirements of mechanical automation production and simple structure and easy processing, a penetration-type vehicle-mounted common-mode filter inductor is designed. The specific solution is as follows:

[0030] like Figure 1-3 As shown, a penetration-type vehicle-mounted common-mode filter inductor includes a base, a magnetic core and a copper busbar. The magnetic core is provided with a magnetic core shell. The magnetic core shell and the base are an integrated structure. The magnetic core shell is arranged on one side of the base. A copper busbar terminal is arranged on the base. The copper busbar is connected to the copper busbar terminal and the copper busbar is inserted into the magnetic core. Grounding copper buses are also arranged on both sides of the bottom of the base for connecting the bottom line.

[0031] The magnetic core is a racetrack structure.

[0032] Specifically, the magnetic core is an integrated racetrack-shaped magnetic core. Compared with the circular ring-shaped magnetic core, the racetrack-shaped magnetic core is flatter and has a larger lateral inner diameter space, which is more convenient for subsequent installation and connection of the copper busbar.

[0033] The size of the core can be selected by calculating the relevant parameters of the car and then choosing the appropriate material to make the core to meet the function of inductor filtering.

[0034] One side of the magnetic core shell is an open structure, and the magnetic core shell is provided with a racetrack-shaped groove matching the magnetic core, and the depth of the groove is greater than the thickness of the magnetic core.

[0035] After the core is installed, the extra thickness of the groove is used to apply thermal conductive silicone. The thermal conductive silicone is applied until it is flush with the edge of the core shell to conduct heat and protect the core.

[0036] The outward side of the core is coated with thermally conductive silicone.

[0037] The copper bus terminal is fixedly installed on the top surface of the base and is located within the inner diameter of the magnetic core. The copper bus terminal is provided with a connecting portion, which passes through the base and is led out from the bottom of the base. A round hole is opened at the front end of the connecting portion for penetrating connection.

[0038] The copper busbar terminal and the grounding copper busbar are both provided with fixing holes that pass through the base, which are used to fix the copper busbar terminal, the grounding copper busbar and the base. A sleeve is provided in the fixing hole, and the inductor can be fixed in the car by installing screws later. Even if a hole cannot be locked, a new sleeve can be replaced without replacing the entire inductor.

[0039] There are two fixing holes on the copper bus terminal and the installation position of the copper bus terminal. A shallow groove of the same shape and size is opened on the base for placing the copper bus terminal. The grounding copper bus has a fixing hole. The edges of the copper bus terminal and the grounding copper bus are provided with bent limit parts for inserting into the base to keep the installation stable.

[0040] The top of the magnetic core shell and the top of the base opposite to the magnetic core shell are both provided with a protruding limiting structure.

[0041] Three limiting structures are provided on the top of the core shell, including a block structure located in the center and L-shaped structures located on both sides. A limiting structure is provided on the top of the base. The limiting structure of the base is located on the rear side of the base and between the two copper busbar terminals, protruding upward in a block-shaped structure. Positioning columns are also provided on both sides of the base for positioning and installing the copper busbar. The setting of the limiting structure is used to limit the installation of the inductor as a whole when installing the inductor.

[0042] Capacitors are respectively arranged on both sides of the base and are electrically connected to the copper busbar terminals.

[0043] At the installation position of the capacitor, the base is specially provided with a square installation groove for placing the capacitor. The installation groove is located close to the terminal of the copper busbar on the corresponding side, which facilitates the electrical connection between the capacitor pins and the copper busbar terminals.

[0044] Specifically, during installation, one of the pins of the capacitor is connected to the connecting portion of the copper bus terminal on the corresponding side, and the other pin of the capacitor is used to be connected to the circuit board.

[0045] In this embodiment, the base has a stepped structure at the front and rear, with the portion for installing the copper busbar terminals and the capacitor being at a high position, and the portion for installing the grounding copper busbar being at a low position.

[0046] The bottom of the magnetic core shell and the base are both provided with reinforcing ribs, the reinforcing ribs of the base are in a honeycomb structure, and the reinforcing ribs at the bottom of the magnetic core shell are in a grid structure. Example

[0047] In this embodiment, the inductor structure is basically the same as that of Embodiment 1, except that the grounding copper bars on both sides are arranged below the copper bar terminals, eliminating the original installation position of the grounding copper bars, which saves raw materials and reduces the lateral size of the inductor.

[0048] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the protection content of the present invention.

[0049] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A wear-in vehicle-mounted common-mode filter inductor, comprising a base, a magnetic core and a copper bus, characterized in that: The magnetic core is provided with a magnetic core shell, and the magnetic core shell and the base are an integrated structure. The magnetic core shell is arranged on one side of the base, and a copper bus terminal is arranged on the base. The copper bus is connected to the copper bus terminal and the copper bus is passed through the magnetic core. Grounding copper buses are also arranged on both sides of the bottom of the base for connecting the bottom line.

2. The insertable vehicle-mounted common mode filter inductor according to claim 1, characterized in that: The magnetic core is a racetrack structure.

3. The penetration-type vehicle-mounted common-mode filter inductor according to claim 1, characterized in that: One side of the magnetic core shell is an open structure, and the magnetic core shell is provided with a racetrack-shaped groove matching the magnetic core, and the depth of the groove is greater than the thickness of the magnetic core.

4. The insertable vehicle-mounted common mode filter inductor according to claim 1, characterized in that: The outward side of the magnetic core is coated with thermal conductive silicone.

5. The insertable vehicle-mounted common mode filter inductor according to claim 1, characterized in that: The copper bus terminal is fixedly mounted on the top surface of the base and is located within the inner diameter range of the magnetic core. The copper bus terminal is provided with a connecting portion, which penetrates the base and is led out from the bottom of the base.

6. The insertable vehicle-mounted common mode filter inductor according to claim 1, characterized in that: The copper busbar terminal and the grounding copper busbar are both provided with fixing holes penetrating the base, which are used to fix the copper busbar terminal, the grounding copper busbar and the base.

7. The insertable vehicle-mounted common mode filter inductor according to claim 1, characterized in that: The top of the magnetic core shell and the top of the base opposite to the magnetic core shell are both provided with a protruding limiting structure.

8. The insertable vehicle-mounted common mode filter inductor according to claim 1, characterized in that: Capacitors are respectively arranged on both sides of the base and the capacitors are electrically connected to the copper busbar terminals.

9. The insertable vehicle-mounted common mode filter inductor according to claim 1, characterized in that: The bottom of the magnetic core shell and the base are both provided with reinforcing ribs, the reinforcing ribs of the base are in a honeycomb structure, and the reinforcing ribs at the bottom of the magnetic core shell are in a grid structure.

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