Differential mode inductor with novel magnetic core structure

Abstract

The utility model discloses a novel magnetic core structure differential mode inductor which comprises a first amorphous magnetic core, second amorphous magnetic cores and a coil, the first amorphous magnetic core is of an annular structure, the second amorphous magnetic cores are of an annular structure, and the two second amorphous magnetic cores are arranged side by side and bonded together. The inner surface of the first amorphous magnetic core is bonded with the outer surfaces of the two second amorphous magnetic cores; the number of the coils is three, the three coils are arranged on the magnetic core structure in a sleeving mode side by side, one coil is arranged at the joint of the two second amorphous magnetic cores in a sleeving mode, and the other two coils are arranged at the joint of the two second amorphous magnetic cores and the first amorphous magnetic core in a sleeving mode. The two second amorphous magnetic cores which are arranged side by side and connected with each other are arranged in the first amorphous magnetic core in a sleeved mode, the second amorphous magnetic cores are each of an annular structure, and equivalently, two through grooves are formed in the first amorphous magnetic core, so that three coils can be wound on the magnetic core structure conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of differential mode inductors, and particularly to a differential mode inductor with a novel magnetic core structure. Background Art

[0002] Traditional silicon steel magnetic cores perform well at low frequencies, but at high frequencies, due to the limitations of their material properties, they will face serious heating problems. High-frequency components will cause eddy current losses and hysteresis losses inside the magnetic core, thereby causing the magnetic core to heat up and affecting the performance and lifespan of the inductor; while differential mode inductors are generally used to process alternating current with frequencies of 50HZ / 60HZ, accompanied by high-frequency components of small current, with frequencies up to 10KHZ, and traditional silicon steel magnetic cores cannot withstand the heating effect brought by high-frequency components to the magnetic core.

[0003] Therefore, in order to solve the heating effect brought by high-frequency components to the silicon steel magnetic core in the prior art, amorphous magnetic cores are generally used to change the magnetic core material. An amorphous magnetic core is a ferromagnetic iron core made of a ferromagnetic amorphous alloy. At high frequencies, the loss of the amorphous magnetic core is much lower than that of the traditional silicon steel magnetic core, so it can effectively reduce the heating of the inductor.

[0004] The prior art generally uses amorphous magnetic cores to change the magnetic core material to solve the heating effect brought by high-frequency components to the magnetic core. However, amorphous magnetic cores cannot be stamped and grooved like silicon steel magnetic cores, making it difficult to wind three-phase windings on amorphous magnetic cores. Therefore, we propose a differential mode inductor with a novel magnetic core structure. Content of the Utility Model

[0005] The purpose of the utility model is to improve and innovate in view of the shortcomings and problems in the background art, to solve the problem of difficult three-phase winding of amorphous magnetic core differential mode inductors, and to provide a differential mode inductor with a novel magnetic core structure.

[0006] A differential mode inductor with a novel magnetic core structure includes:

[0007] A magnetic core structure, which includes a first amorphous magnetic core and a second amorphous magnetic core;

[0008] The first amorphous magnetic core, the number of the first amorphous magnetic cores is one, and the first amorphous magnetic core is in a ring structure;

[0009] The second amorphous magnetic core, the number of the second amorphous magnetic cores is two, both of the two second amorphous magnetic cores are in a ring structure, the two second amorphous magnetic cores are arranged side by side and bonded together, and the inner surface of the first amorphous magnetic core is adhesively bonded to the outer surfaces of the two second amorphous magnetic cores;

[0010] A coil, the number of the coils is set to three, and the three coils are sleeved side by side on the magnetic core structure. One of the coils is sleeved on the connection part of two second amorphous magnetic cores, and the other two coils are respectively sleeved on the connection parts of the two second amorphous magnetic cores and the first amorphous magnetic core.

[0011] A further solution is that the three coils are separated from the first amorphous magnetic core and the second amorphous magnetic core by an insulating structure.

[0012] A further solution is that the insulating structure includes a partition skeleton and / or an insulating paper layer. The insulating paper layer wraps the outer surfaces of the first amorphous magnetic core and the second amorphous magnetic core, and the partition skeleton is bonded to the first amorphous magnetic core and the second amorphous magnetic core. The partition skeleton is used to separate the coil from the first amorphous magnetic core and the second amorphous magnetic core.

[0013] A further solution is that both the first amorphous magnetic core and the second amorphous magnetic core are composed of multiple amorphous magnetic core chips. After the head and tail ends of each amorphous magnetic core chip are bonded together, an annular structure is formed, and the outer surface of the adjacent inner amorphous magnetic core chip is adhesively bonded to the inner surface of the outer amorphous magnetic core chip.

[0014] A further solution is that a base plate is installed on the outer surface of the first amorphous magnetic core. The magnetic core structure is installed on the PCB board through the base plate, and the lead-out wires of the three coils pass through the base plate and are welded on the PCB board.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: By sleeving two second amorphous magnetic cores which are arranged side by side and connected with each other inside the first amorphous magnetic core, since the second amorphous magnetic cores are both annular structures, it is equivalent to having two through slots inside the first amorphous magnetic core, so that there is space on the magnetic core structure for winding three coils, which facilitates winding three coils on the magnetic core structure and ensures that the coils are in a closed loop with each other, thus realizing three-phase winding on the amorphous magnetic core. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a three-dimensional structure diagram of a novel magnetic core structure differential mode inductor provided by an embodiment of the present utility model.

[0018] Reference numerals: First amorphous magnetic core 1, Second amorphous magnetic core 2, Coil 3, Partition skeleton 4, Base plate 5. Detailed implementation manners

[0019] To make the objectives, features, and advantages of the present utility model more obvious and understandable, the following provides a detailed description of the specific implementation manners of the present utility model with reference to the accompanying drawings.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific implementation manners and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0022] Please refer to Figure 1 , the present utility model provides a novel differential-mode inductor with a magnetic core structure, including a magnetic core structure, and the magnetic core structure includes a first amorphous magnetic core 1 and a second amorphous magnetic core 2; it should be noted that the first amorphous magnetic core 1 and the second amorphous magnetic core 2 are ferromagnetic iron cores made of amorphous alloys with ferromagnetism; at high frequencies, the loss of the amorphous magnetic core is much lower than that of the traditional silicon steel magnetic core, so it can effectively reduce the heating of the differential-mode inductor. However, the amorphous magnetic core cannot be stamped and grooved like the silicon steel magnetic core, making it difficult to wind multiple coils on the amorphous magnetic core at the same time, that is, it is difficult to perform three-phase winding on the amorphous magnetic core.

[0023] The number of the first amorphous magnetic cores 1 is one, and the first amorphous magnetic core 1 is in a ring structure; the number of the second amorphous magnetic cores 2 is two, and the two second amorphous magnetic cores 2 are also in ring structures. The two second amorphous magnetic cores 2 are arranged side by side and bonded together with glue, and the inner surface of the first amorphous magnetic core 1 and the outer surfaces of the two second amorphous magnetic cores 2 are bonded together with glue.

[0024] It should be noted that both the first amorphous magnetic core 1 and the second amorphous magnetic core 2 are composed of multiple amorphous magnetic core chips. After the head and tail ends of each amorphous magnetic core chip are bonded together, a ring structure is formed, and the outer surface of the adjacent inner-layer amorphous magnetic core chip and the inner surface of the outer-layer amorphous magnetic core chip are bonded together with glue, so as to obtain the ring-structured first amorphous magnetic core 1 and second amorphous magnetic core 2.

[0025] Since the second amorphous magnetic cores 2 are both annular structures, and the first amorphous magnetic core 1 is sleeved on the outer surfaces of the two second amorphous magnetic cores 2, it is equivalent to stamping two through grooves inside the first amorphous magnetic core 1, so that there is space for winding three coils 3 in the magnetic core structure, and it can ensure that the three coils 3 are in a closed loop with each other, thus realizing three-phase winding on the amorphous magnetic core.

[0026] In this embodiment, the number of the coils 3 is set to three, and the three coils 3 are sleeved side by side on the magnetic core structure. One of the coils 3 is sleeved at the connection of the two second amorphous magnetic cores 2, and the other two coils 3 are respectively sleeved at the connections of the two second amorphous magnetic cores 2 and the first amorphous magnetic core 1.

[0027] The three coils 3 are separated from the first amorphous magnetic core 1 and the second amorphous magnetic cores 2 by an insulating structure.

[0028] Specifically, the insulating structure includes a partition frame 4 and / or an insulating paper layer. In this embodiment, a combination of insulating paper and the partition frame 4 is used as the insulating structure. The insulating paper layer wraps the outer surfaces of the middle parts of the first amorphous magnetic core 1 and the second amorphous magnetic cores 2. The insulating paper layer is used to separate the inner rings of the coils 3 from the first amorphous magnetic core 1 or the second amorphous magnetic cores 2. The insulating paper layer is not shown in the figure. The partition frame 4 is bonded to the upper and lower surfaces of the inner rings of the second amorphous magnetic cores 2. The partition frame 4 is used to separate the upper and lower surfaces of the coils 3 from the first amorphous magnetic core 1 and the second amorphous magnetic cores 2. It can be understood that only insulating paper or the partition frame 4 can also be used as the insulating structure, and the present application does not make specific limitations.

[0029] Furthermore, a base plate 5 is further installed at the bottom end of the first amorphous magnetic core 1. The magnetic core structure is installed on the PCB board through the base plate 5. The lead-out wires of the three coils 3 pass through the base plate 5 and are welded on the PCB board. The base plate 5 is used to separate the magnetic core structure and the PCB board.

[0030] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without conflict, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples.

[0031] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A novel differential-mode inductor with a magnetic core structure, characterized in that, Comprising: A magnetic core structure, the magnetic core structure including a first amorphous magnetic core (1) and a second amorphous magnetic core (2); The first amorphous magnetic core (1), the number of the first amorphous magnetic cores (1) being one, and the first amorphous magnetic core (1) being in a ring structure; The second amorphous magnetic core (2), the number of the second amorphous magnetic cores (2) being two, both of the two second amorphous magnetic cores (2) being in a ring structure, the two second amorphous magnetic cores (2) being arranged side by side and bonded together, and the inner surface of the first amorphous magnetic core (1) being adhesively bonded to the outer surfaces of the two second amorphous magnetic cores (2); Coils (3), the number of the coils (3) being three, the three coils (3) being sleeved side by side on the magnetic core structure, one of the coils (3) being sleeved on the connection part of the two second amorphous magnetic cores (2), and the other two coils (3) being respectively sleeved on the connection parts of the two second amorphous magnetic cores (2) and the first amorphous magnetic core (1).

2. A novel differential-mode inductor with a magnetic core structure according to claim 1, characterized in that: The three coils (3) are separated from the first amorphous magnetic core (1) and the second amorphous magnetic core (2) by an insulating structure.

3. A differential mode inductor with a novel magnetic core structure according to claim 2, characterized in that: The insulating structure includes a partition skeleton (4) and / or an insulating paper layer, the insulating paper layer wrapping the outer surfaces of the first amorphous magnetic core (1) and the second amorphous magnetic core (2), the partition skeleton (4) being bonded to the first amorphous magnetic core (1) and the second amorphous magnetic core (2), and the partition skeleton (4) being used to separate the coils (3) from the first amorphous magnetic core (1) and the second amorphous magnetic core (2).

4. A novel differential-mode inductor with a magnetic core structure according to claim 1, characterized in that: Both the first amorphous magnetic core (1) and the second amorphous magnetic core (2) are composed of multiple amorphous magnetic core chips. After the head and tail ends of each amorphous magnetic core chip are bonded together, a ring structure is formed, and the outer surface of the adjacent inner-layer amorphous magnetic core chip is adhesively bonded to the inner surface of the outer-layer amorphous magnetic core chip.

5. A novel differential-mode inductor with a magnetic core structure according to claim 1, characterized in that: A base plate (5) is installed on the outer surface of the first amorphous magnetic core (1), the magnetic core structure is installed on the PCB board through the base plate (5), and the lead-out wires of the three coils (3) pass through the base plate (5) and are welded on the PCB board.

Images