CN221200917U

CN221200917U - Integrated inductor

Info

Publication number: CN221200917U
Application number: CN202323181206.2U
Authority: CN
Inventors: 赵浩; 韩仕杰; 何小康; 燕青; 王航
Original assignee: Sungrow Power Supply Co Ltd
Current assignee: Sungrow Power Supply Co Ltd
Priority date: 2023-11-21
Filing date: 2023-11-21
Publication date: 2024-06-21
Anticipated expiration: 2033-11-21

Abstract

The utility model discloses an integrated inductor. The integrated inductor comprises: at least two differential mode inductance components, each differential mode inductance component comprising a differential mode magnetic core and a winding, the winding comprising at least one coil, each coil being configured in a semi-surrounding shape to have a gap, each coil being partially embedded within the differential mode magnetic core; the common mode magnetic core is constructed to be in a full-surrounding shape so as to surround and form a preset opening, the differential mode inductance component is inserted into the common mode magnetic core through the notch, and one side of the differential mode inductance component stretches into the preset opening. According to the integrated inductor provided by the embodiment of the utility model, the occupied area of the overall structure of the integrated inductor integrated with the differential mode inductor and the common mode inductor on the circuit board is smaller.

Description

Integrated inductor

Technical Field

The present utility model relates to the field of electronic components, and in particular, to an integrated inductor.

Background

In the inverter and the power supply product, there is a filter inductance, which can ensure the stable operation of the power supply system. In the related art, the filter inductance includes a differential mode inductance and a common mode inductance.

In the prior art, the differential mode inductor and the common mode inductor are two independent devices, and in a circuit structure with the differential mode inductor and the common mode inductor, the common occupied area of the differential mode inductor and the common mode inductor on a circuit board is large.

Disclosure of utility model

The utility model provides an integrated inductor, which integrates a differential mode inductor and a common mode inductor and can reduce the total occupied area.

The embodiment of the utility model provides an integrated inductor, which comprises: at least two differential mode inductance assemblies, each differential mode inductance assembly comprising a differential mode magnetic core and a winding, the winding comprising at least one coil, each coil being configured in a semi-surrounding shape to have a gap, each coil being partially embedded within the differential mode magnetic core; the common mode magnetic core is configured into a full-surrounding shape so as to surround and form a preset opening, the differential mode inductance component is inserted into the common mode magnetic core through the notch, and one side of the differential mode inductance component stretches into the preset opening.

According to the integrated inductor provided by the embodiment of the utility model, each differential-mode inductance component comprises the differential-mode magnetic core and the winding, each coil is constructed into a semi-surrounding shape so as to have a notch, the differential-mode inductance component is inserted into the common-mode magnetic core through the notch to form an integrated inductor structure integrated with the differential-mode inductance and the common-mode inductance, and the part functioning as the differential-mode inductance and the part functioning as the common-mode inductance share the coil, so that the occupied area of the integrated inductor integrated with the differential-mode inductance and the common-mode inductance on a circuit board is smaller. Each coil is constructed into a semi-surrounding shape, and part of each coil is embedded in the differential-mode magnetic core, so that the coil and the differential-mode magnetic core are integrated by adopting a simplified process, the differential-mode inductance assembly and the automatic production of the integrated inductor are facilitated, and the production efficiency of the integrated inductor is improved.

According to the foregoing embodiment of the present utility model, the coil is configured in a folded-line-shaped U-shaped structure or an arc-shaped C-shaped structure. In the above embodiment, the coil with the folded-line U-shaped structure or the arc-shaped C-shaped structure is convenient for manufacturing the coil on one hand, and on the other hand, the assembly of the differential mode inductance component and the common mode magnetic core is convenient for further improving the production efficiency of the integrated inductor because the gap is formed on one side of the coil.

According to any one of the foregoing embodiments of the present utility model, the differential mode magnetic core is configured in a folded-line-shaped U-shaped structure or an arc-shaped C-shaped structure. In the above embodiment, the differential-mode magnetic core is also formed in a semi-surrounding shape so as to have a notch, and the differential-mode inductance assembly is conveniently inserted into the common-mode magnetic core after the coil and the differential-mode magnetic core are integrated.

According to any one of the preceding embodiments of the present utility model, the number of differential-mode magnetic cores in each of the differential-mode inductance assemblies corresponds to the number of coils, each of the coils being embedded in a corresponding one of the differential-mode magnetic cores.

According to any of the foregoing embodiments of the present utility model, the number of the coils in each differential-mode inductance assembly is at least two, and at least two of the coils of each differential-mode inductance assembly are embedded in the same differential-mode magnetic core. In the above embodiment, at least two coils are embedded in the same differential mode magnetic core, so that a plurality of coils and the differential mode magnetic core are integrally formed by a simple forming process, and the differential mode inductance assembly is convenient to produce and manufacture.

According to any of the foregoing embodiments of the present utility model, each of the coils includes a coil body embedded in the differential mode magnetic core and two electrical connection terminals exposed outside the differential mode magnetic core, and the coils of the same winding are connected in series with each other through the electrical connection terminals. In the above embodiment, the electrical connection terminals of the coils are located outside the differential mode magnetic core, so that the electrical connection terminals of the coils are electrically connected to each other or to a specific circuit structure.

According to any of the foregoing embodiments of the present utility model, an insulation interval between the coil bodies of adjacent coils; and an insulating structure is arranged between the adjacent differential mode inductance components. In the above embodiment, the insulation space between the coil bodies of the adjacent coils and the insulation structure between the adjacent differential mode inductance components can further improve the safety of the electric appliance.

According to any of the foregoing embodiments of the present utility model, the integrated inductor further comprises: the base comprises a mounting plate and a limiting piece arranged on the mounting plate, and the common-mode magnetic core is arranged on the mounting plate through the limiting piece. In the embodiment, the base is arranged, so that a stable connecting structure can be provided for the differential mode inductance component and the common mode magnetic core of the integrated inductor, and the use stability of the integrated inductor is ensured.

According to any one of the foregoing embodiments of the present utility model, the limiting member includes a plurality of limiting grooves, and the common-mode magnetic core is clamped in the limiting grooves. In the above embodiment, the limiting member includes a plurality of limiting grooves, so that the stability of the connection of the common-mode magnetic core on the base is further improved.

According to any one of the foregoing embodiments of the present utility model, the mounting plate is provided with limiting holes penetrating through two opposite surfaces thereof, and each coil includes a coil body embedded in the differential mode magnetic core and two electrical connection terminals exposed outside the differential mode magnetic core, and the electrical connection terminals are inserted into the limiting holes. In the above embodiment, the electrical connection end is inserted in the limiting hole, so that on one hand, the differential-mode inductance assembly is firmly connected, and on the other hand, the electrical connection end of the coil is convenient to be electrically connected in a specific manner.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a three-dimensional structure of an embodiment of an integrated inductor according to the present utility model;

FIG. 2 is an exploded perspective view of a differential mode inductor assembly according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram illustrating a differential mode inductor assembly according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of a differential mode inductor assembly according to an alternative embodiment of the integrated inductor of the present utility model;

Fig. 5 is a schematic perspective view of an integrated inductor according to an embodiment of the present utility model after a coil is connected to a winding.

Reference numerals illustrate:

100-integrated inductance;

110-differential mode inductance component; 111-differential mode magnetic core; 112-coil; 112 a-electrical connection; k1-a preset space;

120-common mode core; k2-a preset opening;

130-an insulator;

140-a base; 141-a mounting plate; 1411-a limiting hole; 142-limiting piece.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators such as up, down, left, right, front, and rear … … in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a specific posture such as that shown in the drawings, and if the specific posture is changed, the directional indicator is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The embodiment of the utility model provides an integrated inductor. Fig. 1 is a schematic perspective view of an embodiment of an integrated inductor according to the present utility model, and fig. 2 is an exploded perspective view of a differential-mode inductor assembly according to an embodiment of the present utility model. The integrated inductor 100 includes at least two differential mode inductor components 110 and a common mode core 120.

Fig. 3 is a schematic perspective view of a differential mode inductance component according to an embodiment of the present utility model. Each differential mode inductance assembly 110 includes a differential mode magnetic core 111 and a winding including at least one coil 112, each coil 112 being configured in a semi-surrounding shape to have a gap K1, each coil 112 being partially embedded within the differential mode magnetic core 111.

The common-mode magnetic core 120 is configured to be a full-surrounding shape so as to surround and form a preset opening K2, the differential-mode inductance component 110 is inserted into the common-mode magnetic core 120 through the notch K1, and one side of the differential-mode inductance component 110 extends into the preset opening K2.

Coil 112 is, for example, a copper wire coil. In some embodiments, the differential mode core 111 is made of ferrite, or magnetic powder, or the like. In some embodiments, common mode core 120 is made of ferrite, nanocrystalline tape, or amorphous tape, among other materials.

According to the integrated inductor 100 of the embodiment of the present utility model, each differential-mode inductor assembly 110 includes a differential-mode magnetic core 111 and a winding, each coil 112 is configured in a semi-surrounding shape to have a notch K1, the differential-mode inductor assembly 110 is inserted into the common-mode magnetic core 120 through the notch K1, and an integrated inductor 100 structure integrated with a differential-mode inductor and a common-mode inductor is formed, wherein a portion functioning as the differential-mode inductor and a portion functioning as the common-mode inductor share the coil 112, so that the overall structure of the integrated inductor 100 integrated with the differential-mode inductor and the common-mode inductor occupies a smaller area on a circuit board.

In the present embodiment, the differential mode core 111 is made of magnetic powder. In the manufacturing process of the differential-mode inductance assembly 110, the magnetic powder and the coil 112 may be molded or cast, and then co-fired to obtain the differential-mode inductance assembly 110.

According to the integrated inductor 100 of the embodiment of the present utility model, each coil 112 is constructed in a semi-surrounding shape and is partially embedded in the differential-mode magnetic core 111, so that the coil 112 and the differential-mode magnetic core 111 are integrated by a simplified process, that is, the differential-mode inductor assembly 110 is obtained by co-firing after molding or casting the magnetic powder and the coil 112, thereby facilitating the automatic production of the differential-mode inductor assembly 110 and the integrated inductor 100 and improving the production efficiency of the integrated inductor 100.

In the present embodiment, the coil 112 is configured in a zigzag U-shaped structure or an arc-shaped C-shaped structure. In the above embodiment, the coil 112 with a U-shaped structure or a C-shaped structure is convenient for manufacturing the coil 112, and the differential-mode inductance assembly 110 and the common-mode magnetic core 120 are convenient for assembling due to the notch K1 on one side of the coil 112, so as to further improve the production efficiency of the integrated inductor 100.

In some embodiments, differential mode magnetic core 111 is configured in a zigzag U-shaped structure or an arcuate C-shaped structure. Therefore, the differential-mode magnetic core 111 is also formed in a semi-surrounding shape so as to have a notch K1, and the differential-mode inductance assembly 110 is easily inserted into the common-mode magnetic core 120 after the coil 112 is integrated with the differential-mode magnetic core 111.

In the present embodiment, the differential mode core 111 has a U-shaped structure, and the differential mode core 111 is inserted into the common mode core 120. In the above embodiment, the differential mode magnetic core 111 has a U-shaped structure, and the differential mode magnetic core 111 is inserted into the common mode magnetic core 120 to complete the assembly of the differential mode inductance assembly 110 and the common mode magnetic core 120, thereby improving the assembly efficiency and further improving the production efficiency of the integrated inductor 100.

In some embodiments, the winding includes a single coil 112. In some embodiments, the winding includes a plurality of coils 112. In some embodiments, the number of differential-mode magnetic cores 111 in each differential-mode inductance assembly 110 corresponds to the number of coils 112, each coil 112 being embedded in a corresponding one of the differential-mode magnetic cores 111. For example, in the present embodiment, the differential-mode inductance assemblies 110 are plural, each differential-mode inductance assembly 110 includes a differential-mode magnetic core 111 and a winding, wherein the differential-mode magnetic core 111 and the winding in each differential-mode inductance assembly 110 include plural coils 112, and each coil 112 is embedded in a corresponding differential-mode magnetic core 111.

Fig. 4 is a schematic perspective view of a differential mode inductance component according to an alternative embodiment of the integrated inductor of the present utility model. In an alternative embodiment, the number of coils 112 in each differential-mode inductance assembly 110 is at least two, and at least two coils 112 of each differential-mode inductance assembly 110 are embedded in the same differential-mode magnetic core 111. In the alternative embodiment, at least two coils 112 are embedded in the same differential mode magnetic core 111, so that a plurality of coils 112 and the differential mode magnetic core 111 are integrally formed by a simple molding process, thereby facilitating the production and manufacture of the differential mode inductance assembly 110.

As shown in fig. 1 to 3, in some embodiments, each coil 112 includes a coil body embedded in the differential mode magnetic core 111 and two electrical connection terminals 112a exposed outside the differential mode magnetic core 111, and the coils 112 of the same winding are connected in series with each other through the electrical connection terminals 112 a. In the above embodiment, the electrical connection terminals 112a of the coils 112 are located outside the differential mode magnetic core 111, so that the electrical connection terminals 112a of the coils 112 are electrically connected to each other or to a specific circuit structure.

Fig. 5 is a schematic perspective view of an integrated inductor according to an embodiment of the present utility model after a coil is connected to a winding. In some embodiments, the windings of each differential-mode inductance assembly 110 include a plurality of coils 112, with the coils 112 of the same winding being connected in series with each other via electrical connections 112 a. Alternatively, the electrical connection terminals 112a of the plurality of coils 112 may be electrically connected by means of a printed circuit board, copper sheet, resistance welding, high frequency welding, or the like, so that the plurality of coils 112 are connected in series as a desired winding to increase the inductance. In other embodiments, the integrated inductor 100 includes two, three or more windings, selected according to actual needs.

The common mode core 120 may be a toroidal, oval, or rounded rectangular toroidal (or racetrack) core structure.

In some embodiments, the coil bodies of adjacent coils 112 are spaced apart by an insulation distance. In some embodiments, adjacent differential-mode inductive components 110 have an insulating structure therebetween. In some embodiments, the insulation between the coil bodies of adjacent coils 112 may be provided with insulation, or with a physical air gap, or with insulation using the differential mode core 111 body material. In some embodiments, the insulation structure between adjacent differential-mode inductance components 110, such as enameled wires, physical air gaps, insulating tapes, etc., may also be an insulation structure using the material of the differential-mode magnetic core 111. In the above embodiment, the insulation interval between the coil bodies of the adjacent coils 112 and the insulation structure between the adjacent differential-mode inductance assemblies 110 can further improve the electrical safety.

As shown in fig. 1 and 2, in one example, the coil bodies of adjacent coils 112 are separated from each other by a physical air gap, and adjacent differential-mode inductance components 110 are insulated from each other by an insulator 130.

In some embodiments, the differential mode magnetic core is molded or cast from a particular magnetic powder, wherein the particular magnetic powder comprises a magnetic powder body and an insulating layer attached to a surface of the magnetic powder body. The magnetic powder body may be a metal powder (including an alloy powder), a nanocrystalline magnetic powder, an amorphous magnetic powder, or the like, and may be, for example, an Fe metal magnetic powder, an FeSi metal magnetic powder, a FeNi metal magnetic powder, feSiCr metal magnetic powder, a fesai metal magnetic powder, an Fe-based amorphous magnetic powder. The insulating layer is made of insulating material with high resistivity and adhesive force, and is obtained by insulating treatment on the surface of the magnetic powder body. The differential-mode magnetic core obtained by molding or casting the specific magnetic powder has insulation properties and can form an insulation space between the coil bodies of the adjacent coils 112.

In some embodiments, integrated inductor 100 further includes a base 140. The base 140 includes a mounting plate 141 and a limiting member 142 disposed on the mounting plate 141. The common-mode core 120 is mounted on the mounting plate 141 via a stopper 142.

In the above embodiment, by providing the base 140, a stable connection structure can be provided for the differential mode inductance component 110 and the common mode magnetic core 120 of the integrated inductance 100, so as to ensure the stability of the integrated inductance 100 in use.

In some embodiments, the limiting member 142 includes a plurality of limiting grooves, and the common-mode core 120 is clamped in the limiting grooves. In the above embodiment, the limiting member 142 includes a plurality of limiting grooves, thereby further improving the stability of the connection of the common mode core 120 to the base 140.

In some embodiments, the mounting plate 141 is provided with a limiting hole 1411 penetrating through two opposite surfaces thereof, and each coil 112 includes a coil body embedded in the differential mode magnetic core 111 and two electrical connection terminals 112a exposed outside the differential mode magnetic core 111, wherein the electrical connection terminals 112a are inserted into the limiting hole 1411. Since the electrical connection end 112a is inserted into the limiting hole 1411, on one hand, the differential-mode inductance assembly 110 is firmly connected, and on the other hand, the specific electrical connection of the electrical connection end 112a of the coil 112 is facilitated.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, but rather, the equivalent structural changes made by the description and drawings of the present utility model or the direct/indirect application in other related technical fields are included in the scope of the present utility model.

Claims

1. An integrated inductor, comprising:

At least two differential mode inductance assemblies, each differential mode inductance assembly comprising a differential mode magnetic core and a winding, the winding comprising at least one coil, each coil being configured in a semi-surrounding shape to have a gap, each coil being partially embedded within the differential mode magnetic core;

The common mode magnetic core is configured into a full-surrounding shape so as to surround and form a preset opening, the differential mode inductance component is inserted into the common mode magnetic core through the notch, and one side of the differential mode inductance component stretches into the preset opening.

2. The integrated inductor of claim 1, wherein the coil is configured in a folded U-shaped configuration or an arcuate C-shaped configuration.

3. The integrated inductor of claim 1, wherein the differential mode core is configured in a folded U-shaped configuration or an arcuate C-shaped configuration.

4. The integrated inductor of claim 1, wherein a number of said differential mode magnetic cores in each said differential mode inductor assembly corresponds to a number of said coils, each said coil being embedded in a corresponding one of said differential mode magnetic cores.

5. The integrated inductor of claim 1 wherein said number of said coils in each of said differential mode inductor assemblies is at least two, and wherein at least two of said coils of each of said differential mode inductor assemblies are embedded in a common said differential mode core.

6. The integrated inductor of claim 1 wherein each of said coils comprises a coil body embedded within said differential mode core and two electrical connection terminals exposed outside said differential mode core, said coils of the same winding being connected in series with one another through said electrical connection terminals.

7. The integrated inductor of claim 6 wherein said coil bodies of adjacent said coils are spaced apart by an insulation distance; and an insulating structure is arranged between the adjacent differential mode inductance components.

8. The integrated inductor of claim 1, further comprising:

The base comprises a mounting plate and a limiting piece arranged on the mounting plate, and the common-mode magnetic core is arranged on the mounting plate through the limiting piece.

9. The integrated inductor of claim 8, wherein the spacing member includes a plurality of spacing slots, the common mode core being snapped into the spacing slots.

10. The integrated inductor of claim 8 wherein said mounting plate is provided with spacing holes extending through opposite surfaces thereof, each of said coils including a coil body embedded in said differential mode core and two electrical connection terminals exposed outside said differential mode core, said electrical connection terminals being inserted through said spacing holes.