Double-winding coupling inductor

Abstract

The utility model relates to the technical field of inductors, and particularly discloses a duplex-winding coupling inductor which comprises an inductor body made of magnetic powder, a first coil, a second coil, two first electrode plates and two second electrode plates. The first coil and the second coil are wound together, the two first electrode plates are connected with the two ends of the first coil respectively, and the two second electrode plates are connected with the two ends of the second coil respectively; the inductor body wraps the first coil and the second coil, the two first electrode plates and the two second electrode plates extend out of the inductor body and extend to the bottom face of the inductor body, the two first electrode plates are located at one set of opposite angles of the bottom face of the inductor body, and the two second electrode plates are located at the other set of opposite angles of the bottom face of the inductor body. According to the utility model, the magnetic circuit can be prolonged, and the two electrode plates connected with the same coil are not easy to be short-circuited.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of inductance, especially a double-winding coupled inductance. BACKGROUND

[0002] The double-winding coupled inductance refers to the inductance having two coils coupled with each other inside, which plays the role of EMI filtering and is used for inhibiting electromagnetic waves generated by high-speed signal lines and has very wide application in the field of electronic circuits.

[0003] However, in the existing double-winding coupled inductance, the two electrode pieces connected with the same coil are usually arranged on the same side of the inductance, and the distance between the two electrode pieces is relatively short, so that the magnetic circuit is not utilized better, and the two electrode pieces connected with the same coil are easily short-circuited during welding. SUMMARY

[0004] The utility model provides a double-winding coupled inductance, which can prolong the magnetic circuit and prevent the two electrode pieces connected with the same coil from being short-circuited.

[0005] To solve the above problems, the utility model adopts the following technical scheme:

[0006] The embodiment of the utility model provides a double-winding coupled inductance, which comprises an inductance body made of magnetic powder, a first coil, a second coil, two first electrode pieces and two second electrode pieces. The first coil and the second coil are wound together, the two first electrode pieces are connected with the two ends of the first coil respectively, and the two second electrode pieces are connected with the two ends of the second coil respectively. The inductance body wraps the first coil and the second coil, the two first electrode pieces and the two second electrode pieces all extend out of the inductance body and extend to the bottom surface of the inductance body, the two first electrode pieces are located at one set of opposite corners of the bottom surface of the inductance body, and the two second electrode pieces are located at another set of opposite corners of the bottom surface of the inductance body.

[0007] In some embodiments, the first coil and the second coil are double-helically wound.

[0008] In some embodiments, the first coil and the second coil each comprise an outer coil and an inner coil, and the outer coil of each of the first coil and the second coil is sleeved on the outside of the inner coil.

[0009] In some embodiments, the first electrode piece and the second electrode piece each comprise a welding portion located on the bottom surface of the inductance body, the bottom surface of the inductance body is provided with first missing slots on both sides, and the welding portion of the first electrode piece and the welding portion of the second electrode piece are embedded in the first missing slots adjacent thereto.

[0010] In some embodiments, the first electrode sheet and the second electrode sheet each include a first connecting portion and a second connecting portion. The end of the first coil, the first connecting portion of the first electrode sheet, the second connecting portion of the first electrode sheet, and the welding portion of the first electrode sheet are sequentially connected. The end of the second coil, the first connecting portion of the second electrode sheet, the second connecting portion of the second electrode sheet, and the welding portion of the second electrode sheet are sequentially connected. The first connecting portion of the first electrode sheet and the first connecting portion of the second electrode sheet are both embedded in the inductor body. The second connecting portion of the first electrode sheet and the second connecting portion of the second electrode sheet are located on the side of the inductor body.

[0011] In some embodiments, each side of the inductor body is provided with a second slot that communicates with the adjacent first slot, and the second connecting portion of the first electrode sheet and the second connecting portion of the second electrode sheet are both embedded in the second slot adjacent to them.

[0012] In some embodiments, the end of the first coil and the first connecting portion of the first electrode sheet are welded and fixed, and the end of the second coil and the first connecting portion of the second electrode sheet are welded and fixed.

[0013] The present invention has at least the following beneficial effects: the two first electrode plates connected to the first coil are located at one diagonal of the bottom surface of the inductor body, and the two second electrode plates connected to the second coil are located at another diagonal of the bottom surface of the inductor body. That is, the two electrode plates connected to the same coil are diagonally distributed. Compared with the two electrode plates being set on the same side, the distance between the two electrode plates connected to the same coil can be increased, thereby extending the magnetic circuit and improving the space utilization. Moreover, during soldering, the solder is not likely to stick to the two electrode plates located at the diagonal positions at the same time, making it less likely for the two electrode plates connected to the same coil to short-circuit. Attached Figure Description

[0014] Fig. 1 This is a schematic diagram of the structure of a dual-winding coupled inductor according to an embodiment of the present invention;

[0015] Fig. 2 This is a schematic diagram of the structure of a dual-winding coupled inductor according to an embodiment of the present invention after removing the inductor body;

[0016] Fig. 3 This is a cross-sectional schematic diagram of the first coil and the second coil according to an embodiment of the present invention.

[0017] The attached figures are labeled as follows:

[0018] Inductor body 100, first slot 101, second slot 102;

[0019] First coil 210, second coil 220;

[0020] First connecting part 301, second connecting part 302, welding part 303, first electrode plate 310, second electrode plate 320. Detailed Implementation

[0021] This invention provides the following description with reference to the accompanying drawings to aid in a comprehensive understanding of the various embodiments of the invention as defined by the claims and their equivalents. The description includes various specific details to aid understanding, but these details should be considered exemplary only. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the invention.

[0022] In the description of this utility model, the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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.

[0023] It should be understood that when one element (e.g., the first element) is “connected” to another element (e.g., the second element), the element may be directly connected to the other element, or there may be an intervening element (e.g., the third element) between the element and the other element.

[0024] An embodiment of this utility model provides a dual-winding coupled inductor, such as... Figs. 1-3 As shown, the inductor includes an inductor body 100 made of magnetic powder, a first coil 210, a second coil 220, two first electrode plates 310, and two second electrode plates 320. The magnetic powder can be hot-pressed to form a cuboid inductor body 100. The first coil 210 and the second coil 220 are wound together. The two first electrode plates 310 are respectively connected to the two ends of the first coil 210, and the two second electrode plates 320 are respectively connected to the two ends of the second coil 220. When the two first electrode plates 310 are energized, the first coil 210 generates a magnetic field. When the two second electrode plates 320 are energized, the second coil 220 also generates a corresponding magnetic field.

[0025] The inductor body 100 encloses the first coil 210 and the second coil 220, and also encloses a portion of the two first electrode plates 310 and a portion of the two second electrode plates 320. Specifically, the first coil 210, the second coil 220, the two first electrode plates 310, and the two second electrode plates 320 can be fabricated first. Then, the first coil 210, the second coil 220, the two first electrode plates 310, and the two second electrode plates 320 are placed into a special mold. After injecting magnetic powder into the mold, the inductor body 100 is formed by hot pressing or other methods. The inductor body 100 thus encloses the first coil 210, the second coil 220, a portion of the two first electrode plates 310, and a portion of the two second electrode plates 320.

[0026] Both first electrode pieces 310 and two second electrode pieces 320 extend beyond the inductor body 100 and reach the bottom surface of the inductor body 100. The two first electrode pieces 310 are located at one diagonal point on the bottom surface of the inductor body 100, and the two second electrode pieces 320 are located at another diagonal point on the bottom surface of the inductor body 100. That is, the two electrode pieces connected to the same coil are diagonally distributed. Compared with placing them on the same side, the distance between the two electrode pieces connected to the same coil can be increased, thereby extending the magnetic circuit, improving space utilization, and during soldering, solder is less likely to adhere to the two electrode pieces located at diagonal positions at the same time, making it less likely for the two electrode pieces connected to the same coil to short-circuit.

[0027] In some embodiments, the first coil 210 and the second coil 220 are wound in a double helix, so that the first coil 210 and the second coil 220 can be closely attached together, and facilitate the uniform routing of the first coil 210 and the second coil 220.

[0028] Furthermore, such as Fig. 3 As shown, both the first coil 210 and the second coil 220 include an outer coil and an inner coil, meaning that both the first coil 210 and the second coil 220 form a two-coil structure. The outer coil of the first coil 210 is placed outside the inner coil of the first coil 210, and the outer coil of the second coil 220 is placed outside the inner coil of the second coil 220. This structure can increase the number of turns of the first coil 210 and the second coil 220, thereby increasing the magnetic field strength.

[0029] In some embodiments, both the first electrode piece 310 and the second electrode piece 320 include a welding portion 303 located on the bottom surface of the inductor body 100. When mounting the inductor, the welding portion 303 is welded to the circuit board. First notch 101 is provided on both sides of the bottom surface of the inductor body 100. The welding portion 303 of the first electrode piece 310 and the welding portion 303 of the second electrode piece 320 are both embedded in the adjacent first notch 101. During welding, the solder can fill into the first notch 101, thereby making the bottom surface of the inductor body 100 relatively flat. After welding, the distance between the bottom surface of the inductor body 100 and the circuit board is small, and the structure is more compact.

[0030] Furthermore, both the first electrode piece 310 and the second electrode piece 320 further include a first connection portion 301 and a second connection portion 302. The end of the first coil 210, the first connection portion 301 of the first electrode piece 310, the second connection portion 302 of the first electrode piece 310, and the welding portion 303 of the first electrode piece 310 are connected in sequence. The end of the second coil 220, the first connection portion 301 of the second electrode piece 320, the second connection portion 302 of the second electrode piece 320, and the welding portion 303 of the second electrode piece 320 are connected in sequence. The first connection portion 301 of the first electrode piece 310 and the first connection portion 301 of the second electrode piece 320 are both buried in the inductor body 100. The second connection portion 302 of the first electrode piece 310 and the second connection portion 302 of the second electrode piece 320 are located on the side surface of the inductor body 100. This structure can make the electrode piece adjacent to the corresponding coil, and the electrode piece can extend out of the inductor body 100 to facilitate welding.

[0031] Among them, the first connection portion 301, the second connection portion 302, and the welding portion 303 can be in a "U" - shaped structure, so that the electrode piece extends out laterally from the side surface of the inductor body 100.

[0032] In some embodiments, second notch 102 communicating with the adjacent first notch 101 is provided on both side surfaces of the inductor body 100. The second connection portion 302 of the first electrode piece 310 and the second connection portion 302 of the second electrode piece 320 are both embedded in the adjacent second notch 102. Thus, the second connection portion 302 does not protrude from the side surface of the inductor body 100. On the circuit board, the inductor body 100 and the adjacent electronic components can be closer, making the circuit structure compact and improving the integration degree.

[0033] In some embodiments, the end of the first coil 210 and the first connection portion 301 of the first electrode piece 310 are welded and fixed, and the end of the second coil 220 and the first connection portion 301 of the second electrode piece 320 are welded and fixed. Spot welding can be used for welding and fixing, which is convenient for operation.

[0034] The terms and words used in the foregoing description and claims are not limited to their literal meaning, but are merely used by the applicant to enable a clear and consistent understanding of the present invention. Therefore, those skilled in the art should understand that the foregoing description of various embodiments of the present invention is for illustrative purposes only, and not intended to limit the present invention as defined by the appended claims and their equivalents.

Claims

1. A dual-winding coupled inductor, characterized in that: The inductor includes an inductor body made of magnetic powder, a first coil, a second coil, two first electrode plates, and two second electrode plates. The first coil and the second coil are wound together. The two first electrode plates are connected to the two ends of the first coil, and the two second electrode plates are connected to the two ends of the second coil, respectively. The inductor body encloses the first coil and the second coil. The two first electrode plates and the two second electrode plates extend out of the inductor body and reach the bottom surface of the inductor body. The two first electrode plates are located at one set of diagonals on the bottom surface of the inductor body, and the two second electrode plates are located at another set of diagonals on the bottom surface of the inductor body.

2. The dual-winding coupled inductor according to claim 1, characterized in that: The first and second coils are wound in a double helix.

3. The dual-winding coupled inductor according to claim 2, characterized in that: The first coil and the second coil each include an outer ring and an inner ring, with the outer ring of each coil being fitted over the outer side of its inner ring.

4. The dual-winding coupled inductor according to any one of claims 1-3, characterized in that: Both the first electrode sheet and the second electrode sheet include a welding portion located on the bottom surface of the inductor body. Both sides of the bottom surface of the inductor body are provided with a first notch, and the welding portions of the first electrode sheet and the welding portions of the second electrode sheet are embedded in the adjacent first notch.

5. The dual-winding coupled inductor according to claim 4, characterized in that: The first electrode sheet and the second electrode sheet each include a first connecting portion and a second connecting portion. The end of the first coil, the first connecting portion of the first electrode sheet, the second connecting portion of the first electrode sheet and the welding portion of the first electrode sheet are connected in sequence. The end of the second coil, the first connecting portion of the second electrode sheet, the second connecting portion of the second electrode sheet and the welding portion of the second electrode sheet are connected in sequence. The first connecting portion of the first electrode sheet and the first connecting portion of the second electrode sheet are both embedded in the inductor body. The second connecting portion of the first electrode sheet and the second connecting portion of the second electrode sheet are located on the side of the inductor body.

6. The dual-winding coupled inductor according to claim 5, characterized in that: Both sides of the inductor body are provided with a second slot that communicates with the adjacent first slot, and the second connecting part of the first electrode sheet and the second connecting part of the second electrode sheet are both embedded in the second slot adjacent to them.

7. The dual-winding coupled inductor according to claim 5, characterized in that: The end of the first coil and the first connecting part of the first electrode sheet are welded and fixed, and the end of the second coil and the first connecting part of the second electrode sheet are welded and fixed.

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