Coupling inductor structure

Abstract

A coupling inductor structure comprises two iron core bodies, one side face of each iron core body is provided with a containing space, each iron core body is provided with a protruding part in the center of the containing space, and the bottom end of at least one containing space transversely extends to the bottom face of the iron core body. Wherein one iron core body is combined with the other iron core body in parallel and in an electrically insulated manner in the direction from the accommodating space to the other accommodating space; the shapes of the two winding conductors respectively correspond to the shapes of the accommodating spaces, so that the winding conductors are combined in the accommodating spaces, each winding conductor is provided with a top and two pin parts, and the pin parts are respectively combined at the bottom end of the top and are respectively positioned on the two sides of the convex parts; the bottom end of each pin part of the at least one winding conductor is bent to the bottom surface of each iron core body. According to the utility model, the two inductors are combined into the coupling inductor in an insulated manner in a manner of facing each other, so that the problems of low coupling coefficient, small effective cross-sectional area and the like caused by superposition of TLVR coils in the prior art can be improved.

Description

Technical Field

[0001] The utility model relates to a magnetic element, in particular to a coupled inductor structure which combines two inductors facing each other. Background Art

[0002] In the era of advanced technology, the industry has developed a variety of microprocessors such as CPU, GPU, ASIC, etc., and the power requirements of microprocessors have been increasing and changing at any time. Voltage stabilizing components with faster transient response are needed to meet power supply requirements. Figure 1 The TLVR (Trans-inductor Voltage Regulator) structure used in the coupled inductor T in the prior art shown above combines the first coil T1 and the second coil T2 in the prior art up and down. The second coil T2 in the prior art has a protrusion T3. This TLVR structure can achieve extremely fast transient response without reducing other key performance parameters, so it is widely used.

[0003] However, because the first coil T1 and the second coil T2 in the prior art are combined up and down, the magnetic fields of the two coils after being energized are likely to affect each other and reduce the coupling coefficient. Also, because space is required to accommodate the first coil T1, the height of the second coil T2 is limited, which in turn limits the height of the protrusion T3, resulting in a smaller effective cross-sectional area of ​​the second coil T2.

[0004] In addition, this TLVR structure has four contacts on the bottom surface, and the distances between the contacts are very close. If they are not carefully adjusted during welding and assembly, a short circuit may occur between the contacts. Utility Model Content

[0005] The main purpose of the utility model is to provide a coupled inductor structure, which combines two inductors in a manner of facing each other, thereby maximizing the coupling coefficient and increasing the effective cross-sectional area of ​​each inductor.

[0006] To achieve the above-mentioned purpose, the coupled inductor structure of the utility model includes two iron core bodies, each of which has a receiving space on one side, each iron core body has a protrusion in the center of the receiving space, and the bottom end of at least one of the receiving spaces extends horizontally to the bottom surface of the iron core body, and one of the iron core bodies is combined with the other iron core body in parallel and electrically insulated in the direction of the receiving space toward the other receiving space; and two winding conductors, whose shapes correspond to each receiving space so that each winding conductor is combined in each receiving space, each winding conductor has a top and two pins, each pin is respectively combined with the bottom end of the top and is respectively located on both sides of each protrusion, and the bottom end of each pin of at least one of the winding conductors is respectively bent into the receiving space on the bottom surface of the iron core body.

[0007] In one embodiment, the top and bottom ends of at least one of the accommodating spaces extend laterally to the top and bottom surfaces of the iron core body, and the top of at least one of the winding conductors is bent into the accommodating space on the top surface of the iron core body, and the bottom ends of each leg portion of at least one of the winding conductors are respectively bent into the accommodating space on the bottom surface of the iron core body; the utility model can bend the top of the winding conductor to the top surface of the iron core body, which means that the height of the protrusion can be very close to the height of the iron core body, further increasing the area of ​​the effective cross-section.

[0008] In order to avoid short circuit between the contacts on the bottom surface, the bottom ends of the pins of one winding conductor can extend toward the opposite two sides adjacent to the accommodating space in the iron core body, so that the bottom ends of the pins of one winding conductor are away from the pins of the other winding conductor.

[0009] In order to electrically insulate the two iron core bodies, an electrically insulating gasket may be combined between the iron core bodies, or the iron core bodies may be bonded together with an electrically insulating colloid.

[0010] Please note that in this article, "iron core" is a common part name for inductor components and is not limited to iron-containing materials.

[0011] The beneficial effects of the utility model are:

[0012] The symmetrical structure of the utility model can maximize the coupling coefficient between inductors, and only one winding conductor is arranged in each iron core body of the utility model. Different from the coupled inductor T in the prior art having both the first coil T1 and the second coil T2, the effective cross-sectional area of ​​the protrusion of the utility model can be larger than the effective cross-sectional area of ​​the protrusion T3 in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to clearly and fully disclose the present invention, preferred embodiments are listed with reference to the accompanying drawings to explain the implementation methods in detail.

[0014] Figure 1 It is a structural schematic diagram of a coupled inductor (TLVR) in the prior art;

[0015] Figure 2 It is a three-dimensional diagram of the first embodiment of the coupled inductor in the utility model;

[0016] Figure 3 The explosion of the embodiment 1 of the coupled inductor in the utility model Figure 1 ;

[0017] Figure 4 The explosion of the embodiment 1 of the coupled inductor in the utility model Figure 2 ;

[0018] FIG5 (A) is a top view of the first embodiment of the coupled inductor of the present invention;

[0019] FIG5 (B) is a bottom view of the first embodiment of the coupled inductor of the present invention;

[0020] Figure 6 It is an exploded view of the second embodiment of the coupled inductor in the utility model;

[0021] Figure 7 It is a top view of the second embodiment of the coupled inductor in the utility model;

[0022] Figure 8 It is an exploded view of the third embodiment of the coupled inductor in the utility model;

[0023] Fig. 9 It is a bottom view of the third embodiment of the coupled inductor in the utility model;

[0024] Fig.10 It is an exploded view of the fourth embodiment of the coupled inductor in the utility model.

[0025] Description of Reference Numerals

[0026] 1 Iron core

[0027] 11 Accommodation space

[0028] 12 protrusion

[0029] 13 Bottom groove space

[0030] 14 Top surface groove space

[0031] 2 Winding conductor

[0032] 21 Top

[0033] 22 pins

[0034] 3Electrical insulation gasket

[0035] Existing technology:

[0036] T coupled inductor

[0037] T1 first coil

[0038] T2 Second Coil

[0039] T3 protrusion. DETAILED DESCRIPTION

[0040] See also Figure 2FIG. 5 discloses drawings of the embodiments of the present invention. The drawings illustrate the first embodiment of the coupled inductor structure of the present invention, which includes two core bodies 1, each of which has a receiving space 11 on one side, and each core body 1 has a protrusion 12 in the center of the receiving space 11. The bottom end of the receiving space 11 of at least one of the core bodies 1 extends horizontally to the bottom surface of the core body 1. Figure 2 As shown in FIG. 5 , the bottom end of the accommodation space 11 of the right side of the core body 1 extends transversely to the bottom surface of the core body 1. In the first embodiment, the protrusion 12 extends to the bottom surface of the core body 1, that is, the bottom end of each accommodation space 11 is divided into two sides by the protrusion 12, so the bottom surface of the right side of the core body 1 has two bottom surface groove spaces 13 connecting the two sides of the bottom end of each accommodation space 11, wherein one core body 1 is connected to the other core body 1 in parallel and electrically insulated in the direction of the accommodation space 11 toward the other accommodation space 11; and two winding conductors 2, whose shapes correspond to each accommodation space 11 so that each winding conductor 2 is combined in each accommodation space 11, each winding conductor 2 has a top 21 and two pins 22, each pin 22 is respectively combined with the bottom end of the top 21 and is respectively located on both sides of each protrusion 12, and the bottom end of each pin 22 of at least one of the winding conductors 2 is bent to the bottom surface of each core body 1, that is, Figure 2 The bottom ends of the pin portions 22 of the winding conductor 2 on the right side of FIG. 5 are bent into the groove spaces 13 of the bottom surfaces, respectively. The bottom ends of the pin portions 22 are respectively used to be combined with a circuit board (not shown).

[0041] The structure of the utility model can maximize the coupling coefficient, and there is no problem of the first coil T1 and the second coil T2 overlapping each other in the prior art. In addition, each iron core body 1 of the utility model is only provided with one winding conductor 2. Unlike the prior art in which the coupling inductor T has both the first coil T1 and the second coil T2, the effective cross-sectional area of ​​the protrusion 12 of the utility model can be larger than the effective cross-sectional area of ​​the protrusion T3 in the prior art. The shape and thickness of each winding conductor 2 can be adjusted according to the parameters such as the inductance and internal resistance required by the product. For example, the thickness of the winding conductor 2 on the left side in the first embodiment is thicker. Alternatively, the iron core body 1 on the left side can also have a bottom groove space 13, so that each pin portion 22 of the winding conductor 2 is bent to the bottom surface of the iron core body 1.

[0042] In order to electrically insulate the two iron core bodies 1 , the iron core bodies 1 in the first embodiment are bonded together with an electrically insulating colloid (not shown).

[0043] like Figure 6 and Figure 7In the second embodiment of the present invention, the top and bottom ends of at least one of the accommodating spaces 11 extend transversely to the top and bottom surfaces of the core body 1, that is, it can be seen that the top surface of the core body 1 on the right side has a top surface groove space 14 connected to the accommodating space 11, and the top 21 of at least one of the winding conductors 2 is bent to the top surface of the core body 1 and is respectively located in the top surface groove space 14, and the bottom ends of the pins 22 of at least one of the winding conductors 2 are respectively bent to the bottom surface of the core body 1 and are respectively located in the bottom surface groove spaces 13. In the second embodiment, the top 21 of one side of the winding conductor 2 is bent to the top surface of the core body 1, indicating that the height of the protrusion 12 can be very close to the height of the core body 1. Unlike the prior art in which the protrusion T3 must be lowered to accommodate the first coil T1, the effective cross-sectional area of ​​the protrusion 12 in the present invention can be larger than the structure in the prior art.

[0044] like Figure 8 and Fig. 9 As shown, in the third embodiment of the present invention, in order to prevent the pins 22 on the bottom surface from short-circuiting each other when soldered to the circuit board, the bottom ends of the pins 22 of one winding conductor 2 can extend toward the two opposite sides adjacent to the accommodating space 11 in the core body 1, that is, bend and extend 90 degrees laterally. Figure 8 It can be seen that the pins 22 of the right winding conductor 2 are oriented at the bottom. Figure 8 The front and rear parts of the middle are bent and extended, and have a stepped design to increase the distance between the left and right legs 22 and the bottom surface of the core body 1. The shape of the bottom groove space 13 of the right core body 1 is also changed to match the stepped bending shape. Fig. 9 It can be seen that the pins 22 of the right iron core body 1 extend to the upper and lower sides, so that the winding conductor 2 ( Fig. 9 The bottom end of each pin portion 22 of the right side of the center) is away from the other winding conductor 2 ( Fig. 9 Each pin portion 22 of the left side of the middle, Fig. 9 The pins 22 on the left side are approximately in the center of the core body 1, so the pins 22 on the left and right sides are not prone to short circuit during welding.

[0045] like Fig.10 In the fourth embodiment of the present invention, in order to electrically insulate the two iron core bodies 1 , an electrically insulating gasket 3 is combined between the iron core bodies 1 .

[0046] However, the above is only a preferred embodiment of the present invention and cannot be used to limit the scope of the present invention. Any changes and modifications that can be obviously made by those skilled in the art should be deemed not to deviate from the essential content of the present invention.

Claims

1. A coupled inductor structure, characterized in that: include: Two iron core bodies, each having a receiving space on one side, each iron core body having a protrusion in the center of the receiving space, at least one bottom end of the receiving space extending transversely to the bottom surface of the iron core body, wherein one iron core body is combined with the other iron core body in parallel and electrically insulated in a direction where the receiving space faces the other receiving space; and Two winding conductors, whose shapes correspond to the respective accommodating spaces so that each winding conductor is combined in each accommodating space, each winding conductor has a top and two pins, each pin is respectively combined with the bottom end of the top and is respectively located on both sides of each protrusion, and the bottom end of each pin of at least one of the winding conductors is respectively bent into the accommodating space on the bottom surface of the iron core body.

2. The coupled inductor structure according to claim 1, characterized in that: The top and bottom ends of at least one of the accommodating spaces extend laterally to the top and bottom surfaces of the core body, and the top of at least one of the winding conductors is bent into the accommodating space on the top surface of the core body, and the bottom ends of the pins of at least one of the winding conductors are respectively bent into the accommodating spaces on the bottom surface of the core body.

3. The coupled inductor structure according to claim 1 or 2, characterized in that: The bottom ends of the pins of one winding conductor extend toward two opposite sides adjacent to the accommodating space in the iron core body.

4. The coupled inductor structure according to claim 1 or 2, characterized in that: An electrical insulating gasket is combined between each iron core body, or each iron core body is bonded by an electrically insulating colloid.

5. The coupled inductor structure according to claim 3, characterized in that: An electrical insulating gasket is combined between each iron core body, or each iron core body is bonded by an electrically insulating colloid.

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