Single-phase double-circuit magnetic integration common mode inductor

Abstract

The invention discloses a single-phase double-circuit magnetic integration common mode inductor which comprises a base, an iron core, a first coil assembly and a second coil assembly, the iron core, the first coil assembly and the second coil assembly are all installed on the surface of the top side of the base, one side of the iron core is sleeved with the first coil assembly, and the other side of the iron core is sleeved with the second coil assembly. The second coil group sleeves the other side of the iron core; the first coil assembly comprises a first coil and a second coil, and the first coil and the second coil are sequentially connected to the side surface of the iron core in a sleeving mode in the length extension direction of one side of the iron core. The second coil assembly comprises a third coil and a fourth coil, and the third coil and the fourth coil are sequentially arranged on the side surface of the iron core in the length extension direction of the other side of the iron core. According to the single-phase double-circuit magnetic integration common mode inductor, the multiple coils are integrated on the same iron core through the magnetic circuit, so that the integration degree of the common mode inductor is greatly improved, and the common mode inductive reactance of the single-phase double-circuit magnetic integration common mode inductor is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of common mode inductors, and in particular to a single-phase dual-path magnetic integrated common mode inductor. Background Art

[0002] Common-mode inductors are inductors used in circuits, which are designed to suppress common-mode interference. In circuits, common-mode interference refers to interference signals that act on two wires in the circuit (usually the power line and the ground line) at the same time. This interference signal may come from the external environment, power supply fluctuations, electromagnetic interference, etc. Common-mode inductors can effectively suppress or filter out these common-mode interference signals through specific inductor coil design and magnetic core structure. Its working principle is to use the inductor coil to adjust the impedance characteristics of the common-mode signal, so that the transmission of the common-mode signal in the circuit is limited to reduce the impact on the normal signal of the circuit. Common-mode inductors are widely used in power supply filtering, signal transmission, communication equipment and other fields. It can improve the anti-interference ability of the circuit and ensure the stability and reliability of the signal.

[0003] Existing common-mode inductors generally have a common-direction winding at each end of the iron core. In actual use, due to the limitation on the number of connectable contacts of the common-mode inductor, the common-mode inductor has poor versatility and expansibility, and the common-mode inductance generated under the preset number of turns is low, and its anti-interference ability is insufficient. Summary of the invention

[0004] Based on this, it is necessary to provide a single-phase dual-path magnetic integrated common-mode inductor to address the technical problem that the existing common-mode inductor has insufficient anti-interference ability.

[0005] A single-phase dual-circuit magnetic integrated common-mode inductor comprises a base, an iron core, a first coil group and a second coil group. The iron core, the first coil group and the second coil group are all mounted on the top surface of the base, the first coil group is sleeved on one side of the iron core, and the second coil group is sleeved on the other side of the iron core.

[0006] The first coil group includes a first coil and a second coil, and the first coil and the second coil are sequentially sleeved on the side surface of the iron core along the length extension direction of one side of the iron core, so that the first coil and the second coil are magnetically integrated on one side of the iron core; the second coil group includes a third coil and a fourth coil, and the third coil and the fourth coil are sequentially sleeved on the side surface of the iron core along the length extension direction of the other side of the iron core, so that the third coil and the fourth coil are magnetically integrated on the other side of the iron core.

[0007] In one embodiment, the iron core is configured as a frame-type structure, and the iron core is provided with a first functional portion and a second functional portion, and the first functional portion and the second functional portion are respectively provided at two opposite sides of the iron core.

[0008] In one embodiment, the first coil and the second coil are sequentially sleeved on the side surface of the first functional portion along the length extension direction of the first functional portion; the third coil and the fourth coil are sequentially sleeved on the side surface of the second functional portion along the length extension direction of the second functional portion.

[0009] In one embodiment, the first coil assembly further includes a first insulating plate, the first insulating plate is matched with a side surface of the first functional portion, and the first insulating plate is disposed between the first coil and the second coil.

[0010] In one embodiment, the first insulating plate is configured as a U-shaped structure, and the first insulating plate is buckled on a side surface of the first functional portion.

[0011] In one embodiment, the second coil assembly further includes a second insulating plate, the second insulating plate corresponds to and matches the side surface of the second functional portion, and the second insulating plate is disposed between the third coil and the fourth coil.

[0012] In one embodiment, the second insulating plate is configured as a U-shaped structure, and the second insulating plate is buckled on the side surface of the second functional portion.

[0013] In one embodiment, the iron core is further provided with a third insulating plate, two ends of the third insulating plate are respectively connected to the iron core, and the third insulating plate is provided between the first coil group and the second coil group.

[0014] In one embodiment, the base includes a bottom plate and a plurality of pads, the plurality of pads are disposed on the top surface of the bottom plate, and the iron core, the first coil group and the second coil group are mounted on the bottom plate and the top surfaces of the plurality of pads.

[0015] In one embodiment, the plurality of spacers are disposed in the middle of the top surface of the bottom plate, and when the core is mounted to the base, the third insulating plate abuts against the top surfaces of the plurality of spacers.

[0016] In one embodiment, when the first coil assembly and the second coil assembly are mounted on the top surface of the bottom plate, the bottom end of the first insulating plate and the bottom end of the second insulating plate are respectively connected to the top surface of the bottom plate.

[0017] In one embodiment, the bottom plate is provided with four wire outlet hole groups, and the four wire outlet hole groups are respectively and one by one arranged at the bottom sides of the first coil, the second coil, the third coil and the fourth coil.

[0018] In one embodiment, each of the above-mentioned wire outlet holes includes two wire outlet holes, each of which passes through the top surface of the bottom plate to the bottom surface of the bottom plate; the wire outlet ends at both ends of the first coil, the second coil, the third coil and the fourth coil respectively pass through the corresponding two wire outlet holes from the top surface of the bottom plate to the bottom surface of the bottom plate.

[0019] The single-phase dual-circuit magnetic integrated common-mode inductor of the present invention integrates two coils on both sides of the iron core, that is, the first coil and the second coil are integrated on one side of the iron core, and the third coil and the fourth coil are integrated on the other side of the iron core, thereby greatly enhancing the versatility and expansibility of the single-phase dual-circuit magnetic integrated common-mode inductor. When the first coil, the second coil, the third coil and the fourth coil are all connected to the circuit, in the first coil group, the first coil and the second coil can respectively generate magnetic fields with the same direction, thereby completing the superposition of magnetic flux between the first coil and the second coil through the iron core; in the second coil group, the third coil and the fourth coil can respectively generate magnetic fields with the same direction, thereby completing the superposition of magnetic flux between the third coil and the fourth coil through the iron core; then, the first coil group and the second coil group complete the superposition of magnetic flux between the first coil group and the second coil group through the iron core, thereby greatly improving the equivalent magnetic permeability of each coil, and promoting the effective improvement of the common-mode inductance of the single-phase dual-circuit magnetic integrated common-mode inductor, thereby improving the anti-interference performance of the common-mode inductor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a single-phase dual-path magnetic integrated common-mode inductor in one embodiment; Figure 2 A schematic diagram of the structure of a single-phase dual-path magnetic integrated common-mode inductor in one embodiment; Figure 3 It is a schematic diagram of the exploded structure of a single-phase dual-circuit magnetic integrated common mode inductor in one embodiment; Figure 4 A schematic diagram of the structure of a single-phase dual-path magnetic integrated common-mode inductor in one embodiment; Figure 5 for Figure 4 A schematic cross-sectional structure diagram of the AA portion in the illustrated embodiment. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention 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 present invention. However, the present invention 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 present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0022] 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 limiting the present invention.

[0023] 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 invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0024] 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.

[0025] In the present invention, 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.

[0026] 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.

[0027] See also Figures 1 to 5 The present invention discloses a single-phase dual-circuit magnetic integrated common-mode inductor, which includes a base 1, an iron core 2, a first coil group 3 and a second coil group 4. The iron core 2, the first coil group 3 and the second coil group 4 are all installed on the top side surface of the base 1, the first coil group 3 is sleeved on one side of the iron core 2, and the second coil group 4 is sleeved on the other side of the iron core 2. Specifically, the first coil group 3 includes a first coil 31 and a second coil 32, and the first coil 31 and the second coil 32 are sequentially sleeved on the side surface of the iron core 2 along the length extension direction of one side of the iron core 2, so that the first coil 31 and the second coil 32 are magnetically integrated on one side of the iron core 2; the second coil group 4 includes a third coil 41 and a fourth coil 42, and the third coil 41 and the fourth coil 42 are sequentially sleeved on the side surface of the iron core 2 along the length extension direction of the other side of the iron core 2, so that the third coil 41 and the fourth coil 42 are magnetically integrated on the other side of the iron core 2. In practical applications, compared with traditional single-phase common-mode inductors, the single-phase dual-circuit magnetically integrated common-mode inductor of the present invention integrates two coils on both sides of the iron core 2, that is, the first coil 31 and the second coil 32 are integrated on one side of the iron core 2, and the third coil 41 and the fourth coil 42 are integrated on the other side of the iron core 2, thereby greatly enhancing the versatility and expansibility of the single-phase dual-circuit magnetically integrated common-mode inductor. When the first coil 31, the second coil 32, the third coil 41 and the fourth coil 42 are all connected to the circuit, in the first coil group 3, the first coil 31 and the second coil 32 can respectively generate magnetic fields of the same direction, thereby completing the superposition of magnetic flux between the first coil 31 and the second coil 32 through the iron core 2; in the second coil group 4, the third coil 41 and the fourth coil 42 can respectively generate magnetic fields of the same direction, thereby completing the superposition of magnetic flux between the third coil 41 and the fourth coil 42 through the iron core 2; then, the first coil group 3 and the second coil group 4 complete the superposition of magnetic flux between the first coil group 3 and the second coil group 4 through the iron core 2, thereby greatly improving the equivalent magnetic permeability of each coil, and promoting the common-mode inductance of the single-phase dual-circuit magnetic integrated common-mode inductor to be effectively improved. On this basis, the single-phase dual-circuit magnetic integrated common-mode inductor of the present invention integrates multiple coils into the same iron core 2 through the magnetic circuit, thereby greatly improving the integration of the common-mode inductor, thereby reducing the actual installation space of the common-mode inductor while ensuring the extensibility of the common-mode inductor.

[0028] See also Figures 1 to 5 , further, the core 2 is set to a frame-type structure, and the core 2 is provided with a first functional part 21 and a second functional part 22, and the first functional part 21 and the second functional part 22 are respectively provided on two opposite sides of the core 2. Specifically, the first coil 31 and the second coil 32 are sequentially sleeved on the side surface of the first functional part 21 along the length extension direction of the first functional part 21; the third coil 41 and the fourth coil 42 are sequentially sleeved on the side surface of the second functional part 22 along the length extension direction of the second functional part 22. In this embodiment, by setting the core 2 to a frame-type structure and mirror-setting the first coil group 3 and the second coil group 4 on both sides of the core 2, the installation space of the core 2 can be effectively utilized, so that the fourth coil 42 can be assembled more compactly, thereby greatly reducing the overall volume of the single-phase dual-circuit magnetic integrated common mode inductor.

[0029] See also Figures 1 to 5 Furthermore, the first coil assembly 3 further includes a first insulating plate 33, which is matched with the side surface of the first functional portion 21, and is disposed between the first coil 31 and the second coil 32, thereby ensuring the insulation performance between the first coil 31 and the second coil 32. Specifically, the first insulating plate 33 is configured as a U-shaped structure, and the first insulating plate 33 is buckled on the side surface of the first functional portion 21, thereby improving the matching degree between the first insulating plate 33 and the first functional portion 21, thereby ensuring the isolation degree between the first coil 31 and the second coil 32.

[0030] See also Figures 1 to 5 Furthermore, the second coil group 4 further includes a second insulating plate 43, which is matched with the side surface of the second functional part 22, and the second insulating plate 43 is arranged between the third coil 41 and the fourth coil 42, so as to ensure the insulation performance between the third coil 41 and the fourth coil 42. Specifically, the second insulating plate 43 is arranged as a U-shaped structure, and the second insulating plate 43 is buckled on the side surface of the second functional part 22, so as to improve the matching degree between the second insulating plate 43 and the second functional part 22, so as to ensure the isolation degree between the third coil 41 and the fourth coil 42.

[0031] See also Figures 1 to 5 Furthermore, the iron core 2 is also provided with a third insulating plate 23, both ends of the third insulating plate 23 are respectively connected to the iron core 2, and the third insulating plate 23 is arranged between the first coil group 3 and the second coil group 4, so as to ensure the insulation performance between the first coil group 3 and the second coil group 4.

[0032] See also Figures 1 to 5, further, the base 1 includes a bottom plate 11 and a plurality of pads 12, the plurality of pads 12 are arranged on the top side surface of the bottom plate 11, and the iron core 2, the first coil group 3 and the second coil group 4 are installed on the bottom plate 11 and the top side surfaces of the plurality of pads 12. Specifically, the plurality of pads 12 are arranged in the middle of the top side surface of the bottom plate 11, and when the iron core 2 is installed to the base 1, the third insulating plate 23 abuts against the top side surfaces of the plurality of pads 12, so that the plurality of pads 12 can effectively support the iron core 2. Specifically, when the first coil group 3 and the second coil group 4 are installed to the top side surface of the bottom plate 11, the bottom end of the first insulating plate 33 and the bottom end of the second insulating plate 43 are respectively connected to the top side surface of the bottom plate 11, so as to strengthen the connection stability between the first insulating plate 33, the second insulating plate 43 and the iron core 2 and the bottom plate 11.

[0033] See also Figures 1 to 5 Furthermore, the bottom plate 11 is provided with four wire outlet hole groups, and the four wire outlet hole groups are respectively provided on the bottom sides of the first coil 31, the second coil 32, the third coil 41 and the fourth coil 42 in a one-to-one correspondence. Specifically, each wire outlet hole group includes two wire outlet holes 111, and each wire outlet hole 111 passes through the top side surface of the bottom plate 11 to the bottom side surface of the bottom plate 11; the wire outlet ends at both ends of the first coil 31, the second coil 32, the third coil 41 and the fourth coil 42 pass through the corresponding two wire outlet holes 111 from the top side surface of the bottom plate 11 to the bottom side surface of the bottom plate 11.

[0034] In summary, the single-phase dual-circuit magnetic integrated common-mode inductor disclosed by the present invention integrates two coils on both sides of the iron core, that is, the first coil and the second coil are integrated on one side of the iron core, and the third coil and the fourth coil are integrated on the other side of the iron core, thereby greatly enhancing the versatility and expansibility of the single-phase dual-circuit magnetic integrated common-mode inductor. When the first coil, the second coil, the third coil and the fourth coil are all connected to the circuit, in the first coil group, the first coil and the second coil can respectively generate magnetic fields with the same direction, thereby completing the superposition of magnetic flux between the first coil and the second coil through the iron core; in the second coil group, the third coil and the fourth coil can respectively generate magnetic fields with the same direction, thereby completing the superposition of magnetic flux between the third coil and the fourth coil through the iron core; then, the first coil group and the second coil group complete the superposition of magnetic flux between the first coil group and the second coil group through the iron core, thereby greatly improving the equivalent magnetic permeability of each coil, and promoting the effective improvement of the common-mode inductance of the single-phase dual-circuit magnetic integrated common-mode inductor, thereby improving the anti-interference performance of the common-mode inductor.

[0035] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A single-phase dual-circuit magnetic integrated common-mode inductor, characterized in that: include: A base, an iron core, a first coil group and a second coil group, wherein the iron core, the first coil group and the second coil group are all mounted on the top surface of the base, the first coil group is sleeved on one side of the iron core, and the second coil group is sleeved on the other side of the iron core; The first coil group includes a first coil and a second coil, and the first coil and the second coil are sequentially sleeved on the side surface of the iron core along the length extension direction of one side of the iron core, so that the first coil and the second coil are magnetically integrated on one side of the iron core; the second coil group includes a third coil and a fourth coil, and the third coil and the fourth coil are sequentially sleeved on the side surface of the iron core along the length extension direction of the other side of the iron core, so that the third coil and the fourth coil are magnetically integrated on the other side of the iron core.

2. The single-phase dual-circuit magnetic integrated common-mode inductor according to claim 1, characterized in that: The iron core is configured as a frame-type structure, and the iron core is provided with a first functional portion and a second functional portion, wherein the first functional portion and the second functional portion are respectively provided at two opposite sides of the iron core.

3. The single-phase dual-circuit magnetic integrated common-mode inductor according to claim 2 is characterized in that: The first coil and the second coil are sequentially sleeved on the side surface of the first functional part along the length extension direction of the first functional part; the third coil and the fourth coil are sequentially sleeved on the side surface of the second functional part along the length extension direction of the second functional part.

4. The single-phase dual-circuit magnetic integrated common-mode inductor according to claim 3 is characterized in that: The first coil group further includes a first insulating plate, the first insulating plate is matched with a side surface of the first functional part, and the first insulating plate is disposed between the first coil and the second coil.

5. The single-phase dual-circuit magnetic integrated common-mode inductor according to claim 4, characterized in that: The first insulating plate is configured as a U-shaped structure, and the first insulating plate is buckled on a side surface of the first functional portion.

6. The single-phase dual-circuit magnetic integrated common-mode inductor according to claim 5, characterized in that: The second coil group further includes a second insulating plate, the second insulating plate is matched with a side surface of the second functional portion, and the second insulating plate is disposed between the third coil and the fourth coil.

7. The single-phase dual-circuit magnetic integrated common-mode inductor according to claim 6, characterized in that: The second insulating plate is configured as a U-shaped structure, and the second insulating plate is buckled on the side surface of the second functional portion.

8. The single-phase dual-circuit magnetic integrated common-mode inductor according to claim 7, characterized in that: The iron core is further provided with a third insulating plate, both ends of the third insulating plate are respectively connected to the iron core, and the third insulating plate is provided between the first coil group and the second coil group.

9. The single-phase dual-circuit magnetic integrated common-mode inductor according to claim 8, characterized in that: The base includes a bottom plate and a plurality of pads, wherein the plurality of pads are arranged on the top side surface of the bottom plate, and the iron core, the first coil group and the second coil group are installed on the bottom plate and the top side surfaces of the plurality of pads.

10. The single-phase dual-circuit magnetic integrated common-mode inductor according to claim 9, characterized in that: A plurality of the pads are arranged at the middle of the top side surface of the bottom plate. When the iron core is mounted to the base, the third insulating plate abuts against the top side surfaces of the plurality of the pads.

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