CN220895298U

CN220895298U - Power inductor

Info

Publication number: CN220895298U
Application number: CN202322493199.3U
Authority: CN
Inventors: 周玮
Original assignee: Lianzhen Electronics Shenzhen Co ltd
Current assignee: Lianzhen Electronics Shenzhen Co ltd
Priority date: 2023-09-13
Filing date: 2023-09-13
Publication date: 2024-05-03
Anticipated expiration: 2033-09-13

Abstract

The utility model discloses a power inductor, comprising: a magnetic core, a conductor, and a heat sink; the magnetic core is provided with a through hole penetrating through the inside of the magnetic core, and the magnetic core is provided with a first end face and a second end face which are adjacently arranged; the conductor comprises a terminal part and a main body part, the main body part is arranged in the through hole, the terminal part is connected with the main body part, the terminal part is arranged on the outer surface of the magnetic core, and the terminal part is used for being connected with the circuit board; the heat dissipation portion comprises a first heat dissipation portion and a second heat dissipation portion, wherein the first heat dissipation portion extends from one end of the main body portion to the first end face along the first direction, and the second heat dissipation portion extends from one end of the first heat dissipation portion away from the main body portion to the second end face along the second direction. The utility model effectively increases the heat dissipation area, thereby improving the heat dissipation capacity of the power inductor.

Description

Power inductor

Technical Field

The utility model relates to the technical field of inductors, in particular to a power inductor.

Background

Currently, power inductance refers to inductance that can act as a transfer station for energy through a large current. Has the characteristics of miniaturization, high quality, high energy storage, low resistance value and the like.

The power inductor comprises a magnetic core and a conductor, wherein the conductor is arranged inside the magnetic core, and two end parts of the conductor extend to the outside of the magnetic core and are bent downwards to form two terminals. When the power inductor is used on the circuit board, the power inductor generates loss due to the alternating current passing through large current, the temperature of the power inductor is increased, and effective heat dissipation of the power inductor is needed to maintain normal operation. Especially, as the power consumption of the chip is larger, the current carried by the power inductor is larger, and the relative loss and the generated temperature are higher, so that the heat dissipation problem of the power inductor is more serious, thereby reducing the service life of the power inductor and affecting the normal operation of the power inductor.

Disclosure of utility model

Based on this, it is necessary to provide a power inductor capable of effectively improving heat dissipation capability.

A power inductor, comprising:

The magnetic core is provided with a through hole penetrating through the inside of the magnetic core, and the magnetic core is provided with a first end face and a second end face which are adjacently arranged;

A conductor including a terminal portion and a main body portion, the main body portion being disposed in the through hole, the terminal portion being connected to the main body portion, the terminal portion being disposed on an outer surface of the magnetic core, the terminal portion being for connection to a circuit board; and

The heat dissipation portion comprises a first heat dissipation portion and a second heat dissipation portion, the first heat dissipation portion extends from one end of the main body portion to the first end face along a first direction, and the second heat dissipation portion extends from one end of the first heat dissipation portion away from the main body portion to the second end face along a second direction.

Optionally, the magnetic core further includes a third end surface, where the first end surface and the third end surface are opposite, and the second end surface is disposed between the first end surface and the third end surface; the heat dissipation part further comprises a third heat dissipation part and a fourth heat dissipation part, the third heat dissipation part extends from the other end of the main body part to the third end face along a first direction, and the fourth heat dissipation part extends from one end of the third heat dissipation part away from the main body part to the second end face along a third direction opposite to the second direction.

Optionally, the heat dissipation part is made of metal.

Optionally, the terminal portion includes a first end portion formed extending from one end of the main body portion in a fourth direction opposite to the first direction, and a second end portion formed extending from one end of the main body portion in the fourth direction.

Optionally, the first end portion includes a first connection portion formed by extending from one end of the main body portion in a fourth direction opposite to the first direction, and a first terminal formed by extending from one end of the first connection portion away from the main body portion in the second direction.

Optionally, the second end portion includes a second connection portion formed extending from the other end of the main body portion in a fourth direction opposite to the first direction, and a second terminal formed extending from the one end of the second connection portion away from the main body portion in a third direction opposite to the second direction.

Optionally, the magnetic core includes first magnetic core and second magnetic core, first magnetic core has perpendicular to the first faying surface of first terminal surface, the second magnetic core have perpendicular with the second faying surface of first terminal surface, logical groove has been seted up to first faying surface, first faying surface with the second faying surface is laminated mutually, logical groove with the second faying surface surrounds and constitutes the through-hole.

Optionally, the second magnetic core has with the relative bottom surface that sets up of second faying surface, first mounting groove and second mounting groove have been seted up to the bottom surface, first end part set up in the first mounting groove, second end part set up in the second mounting groove.

Optionally, the conductor and the heat dissipation portion are integrally formed.

According to the application, the heat radiating part is arranged on the outer surface of the magnetic core, so that the generated heat can be timely discharged through the heat radiating part when the power inductor is used, the heat radiating capacity of the power inductor is effectively improved, and the power inductor can also maintain normal operation when carrying large current. In addition, the first heat dissipation part attached to the first end face and the second heat dissipation part attached to the second end face are respectively arranged on the first end face and the second end face adjacent to the magnetic core, so that the heat dissipation area is effectively increased, and the heat dissipation capacity of the power inductor is further improved.

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 an overall structure of a power inductor according to an embodiment;

FIG. 2 is a schematic diagram of a heat sink and a conductor according to an embodiment;

Fig. 3 is a schematic diagram of the overall structure of a power inductor in the first embodiment;

Fig. 4 is a schematic structural diagram of a heat dissipating part and a conductor in the first embodiment;

Fig. 5 is a schematic diagram of the overall structure of a power inductor in the second embodiment;

FIG. 6 is a schematic diagram of a first magnetic core according to an embodiment;

fig. 7 is a schematic structural diagram of a second magnetic core in an embodiment.

Part names and serial numbers in the figure: 1. a magnetic core; 11. a through hole; 12. a first end face; 13. a second end face; 14. a third end face; 15. a first magnetic core; 151. a first bonding surface; 152. a through groove; 16. a second magnetic core; 161. a second bonding surface; 162. a first mounting groove; 163. a second mounting groove; 2. a conductor; 21. a terminal portion; 22. a main body portion; 23. a first end; 231. a first connection portion; 232. a first terminal; 24. a second end; 241. a second connecting portion; 242. a second terminal; 3. a heat dissipation part; 31. a first heat dissipation part; 32. a second heat dissipation part; 33. a third heat dissipation part; 34. a fourth heat radiation section; 4. a first direction; 5. a second direction;

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 particular posture (as shown in the drawings), and if the particular 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, "and/or" in the whole text includes three schemes, taking a and/or B as an example, including a technical scheme, B technical scheme, and technical scheme that a and B meet simultaneously, in addition, the technical schemes between the various embodiments may be combined with each other, but it is necessary to be based on that the technical scheme can be realized by those of ordinary skill in the art, when the combination of the technical schemes contradicts or cannot be realized, the combination of the technical schemes should be considered to be absent, and is not within the protection scope of the utility model claimed.

Referring to fig. 1 and 2, the present application provides a power inductor including a magnetic core 1, a conductor 2, and a heat sink 3; the magnetic core 1 is provided with a through hole 11 penetrating through the interior of the magnetic core 1, and the magnetic core 1 is provided with a first end face 12 and a second end face 13 which are adjacently arranged; the conductor 2 includes a terminal portion 21 and a main body portion 22, the main body portion 22 is disposed in the through hole 11, the terminal portion 21 is connected with the main body portion 22, the terminal portion 21 is disposed on the outer surface of the magnetic core 1, and the terminal portion 21 is used for connection with a circuit board; the heat dissipation portion 3 includes a first heat dissipation portion 31 and a second heat dissipation portion 32, the first heat dissipation portion 31 extending from an end of the main body portion 22 to the first end face 12 along the first direction 4, and the second heat dissipation portion 32 extending from an end of the first heat dissipation portion 31 away from the main body portion 22 to the second end face 13 along the second direction 5.

According to the application, the heat radiating part 3 is arranged on the outer surface of the magnetic core 1, so that the generated heat can be timely discharged through the heat radiating part 3 when the power inductor is used, the heat radiating capacity of the power inductor is effectively improved, and the power inductor can also maintain normal operation when carrying high current. In addition, the first radiating part 31 attached to the first end face 12 and the second radiating part 32 attached to the second end face 13 are respectively arranged on the first end face 12 and the second end face 13 adjacent to the magnetic core 1, so that the radiating area is effectively increased, and the radiating capacity of the power inductor is further improved.

In the present embodiment, the first heat dissipating portion 31 extends from the middle of the first end face 12 to a side of the first end face 12 near the second end face 13, and the second heat dissipating portion 32 extends from a side of the second end face 13 near the first end face 12 to a side of the second end face 13 away from the first end face 12.

Specifically, the first direction 4 is a direction upward along the height direction of the magnetic core 1, and the second direction 5 is a direction rightward along the length direction of the magnetic core 1.

Specifically, the length-width dimension of the second heat dissipating portion 32 is smaller than or equal to the length-width dimension of the second end face 13. Preferably, the length-width dimension of the second heat dissipating portion 32 is identical to the length-width dimension of the second end face 13.

In the first embodiment, the power inductor is a single-path inductor, and referring to fig. 3 and fig. 4, unlike the present embodiment, the magnetic core 1 further includes a third end surface 14, the first end surface 12 and the third end surface 14 are disposed opposite to each other, and the second end surface 13 is disposed between the first end surface 12 and the third end surface 14; the heat dissipation portion 3 further includes a third heat dissipation portion 33 and a fourth heat dissipation portion 34, the third heat dissipation portion 33 extending from the other end of the main body portion 22 to the third end face 14 in the first direction 4, the fourth heat dissipation portion 34 extending from the end of the third heat dissipation portion 33 away from the main body portion 22 to the second end face 13 in a third direction opposite to the second direction 5.

Further, by providing the third heat dissipation portion 33 and the fourth heat dissipation portion 34, the heat dissipation area is further increased, and the heat dissipation capability of the power inductor of the present application is further improved.

Specifically, the third direction is a direction to the left along the length direction of the magnetic core 1.

Specifically, the third heat dissipation portion 33 extends from the middle portion of the third end face 14 to a side of the third end face 14 close to the second end face 13, the fourth heat dissipation portion 34 extends from a side of the second end face 13 close to the third end face 14 to the middle portion of the second end face 13, and the second heat dissipation portion 32 is disposed opposite to the fourth heat dissipation portion 34.

Referring to fig. 5, in the second embodiment, unlike the first embodiment, the power inductor in the second embodiment is a multi-path inductor, the first heat dissipation portion 31 and the second heat dissipation portion 32 are a first group, the third heat dissipation portion 33 and the fourth heat dissipation portion 34 are a second group, and the number of the first group and the second group is the same as the number of the inductors and are respectively disposed at opposite ends of the inductors. In this embodiment, the number of the first group and the second group is two when the inductor is a two-way inductor.

Referring to fig. 2, the conductor 2 and the heat sink 3 are integrally formed. Specifically, the conductor 2 and the heat dissipation portion 3 are both made of a metal material, and the thermal conductivity of the metal material is 50-415W/(m·k). This is because, in the prior art, a heat-conducting silicon sheet is attached to the top surface of the power inductor to achieve effective heat dissipation of the power inductor, and the magnetic material of the power inductor is ferrite or alloy, and the heat conductivity is 5W/(m·k). The heat conductivity coefficient of the heat conducting silica gel sheet is 8-14W/(m.K). By adopting the metal material, the power-on function of the conductor 2 and the heat dissipation function of the heat dissipation part 3 can be realized, and the heat conductivity coefficient of the metal material is far greater than that of the magnetic core, so that the heat dissipation capacity of the power inductor is further improved.

Preferably, the heat dissipation portion 3 of the present application is made of red copper, and the heat conductivity of red copper is as high as 400W/(m·k), so that the heat dissipation capability is better.

Referring to fig. 2, the terminal portion 21 includes a first end portion 23 and a second end portion 24, the first end portion 23 extending from one end of the main body portion 22 in a fourth direction opposite to the first direction 4, and the second end portion 24 extending from one end of the main body portion 22 in the fourth direction.

Specifically, the fourth direction is a direction downward in the height direction of the magnetic core 1.

Referring to fig. 2, the first end portion 23 includes a first connection portion 231 and a first terminal 232, the first connection portion 231 is formed to extend from one end of the main body portion 22 in a fourth direction opposite to the first direction 4, and the first terminal 232 is formed to extend from one end of the first connection portion 231 away from the main body portion 22 in the second direction 5.

Specifically, the first connection portion 231 extends vertically downward from one end of the main body portion 22 to the bottom end of the first end face 12, and the first terminal 232 extends vertically rightward from one end of the first connection portion 231 away from the main body to the bottom face of the magnetic core 1.

Referring to fig. 2, the second end portion 24 includes a second connection portion 241 and a second terminal 242, the second connection portion 241 being formed extending from the other end of the main body portion 22 in a fourth direction opposite to the first direction 4, and the second terminal 242 being formed extending from the end of the second connection portion 241 remote from the main body portion 22 in a third direction opposite to the second direction 5.

Specifically, the second connection portion 241 extends vertically downward from the other end of the main body portion 22 to the bottom end of the third end face 14, and the second terminal 242 extends vertically leftward from the end of the second connection portion 241 away from the main body portion 22 to the bottom surface of the magnetic core 1.

Referring to fig. 6 and 7, the magnetic core 1 includes a first magnetic core 15 and a second magnetic core 16, the first magnetic core 15 has a first bonding surface 151 perpendicular to the first end surface 12, the second magnetic core 16 has a second bonding surface 161 perpendicular to the first end surface 12, the first bonding surface 151 is provided with a through groove 152, the first bonding surface 151 and the second bonding surface 161 are bonded, and the through groove 152 and the second bonding surface 161 are surrounded to form a through hole 11.

Specifically, the shape and size of the through hole 11 match the shape and size of the main body portion 22.

Referring to fig. 1, the second magnetic core 16 has a bottom surface disposed opposite to the second bonding surface 161, and the bottom surface is provided with a first mounting groove 162 and a second mounting groove 163, the first terminal 232 is disposed in the first mounting groove 162, and the second terminal 242 is disposed in the second mounting groove 163.

Specifically, the bottom ends of the first terminals 232 and the bottom surfaces of the second magnetic cores 16 are flush with the bottom ends of the second terminals 242, so that the power inductor of the application is smoothly welded on the circuit board.

The foregoing description of the preferred embodiments of the present utility model should not be construed as limiting the scope of the utility model, but rather should be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model as defined by the following description and drawings or any application directly or indirectly to other relevant art(s).

Claims

1. A power inductor, comprising:

2. The power inductor of claim 1, wherein the magnetic core further comprises a third end face, the first end face and the third end face being disposed opposite each other, the second end face being disposed between the first end face and the third end face; the heat dissipation part further comprises a third heat dissipation part and a fourth heat dissipation part, the third heat dissipation part extends from the other end of the main body part to the third end face along a first direction, and the fourth heat dissipation part extends from one end of the third heat dissipation part away from the main body part to the second end face along a third direction opposite to the second direction.

3. The power inductor as claimed in claim 1, wherein the heat sink is made of metal.

4. The power inductor of claim 1, wherein the terminal portion includes a first end portion and a second end portion, the first end portion extending from an end of the main body portion in a fourth direction opposite the first direction, the second end portion extending from an end of the main body portion in the fourth direction.

5. The power inductor as claimed in claim 4, wherein the first end portion includes a first connection portion formed extending from an end of the main body portion in a fourth direction opposite to the first direction, and a first terminal formed extending from an end of the first connection portion remote from the main body portion in the second direction.

6. The power inductor as claimed in claim 4, wherein the second end portion includes a second connection portion formed extending from the other end of the main body portion in a fourth direction opposite to the first direction, and a second terminal formed extending from an end of the second connection portion remote from the main body portion in a third direction opposite to the second direction.

7. The power inductor of claim 4, wherein the magnetic core comprises a first magnetic core and a second magnetic core, the first magnetic core has a first bonding surface perpendicular to the first end surface, the second magnetic core has a second bonding surface perpendicular to the first end surface, the first bonding surface is provided with a through slot, the first bonding surface and the second bonding surface are bonded, and the through slot and the second bonding surface are surrounded to form the through hole.

8. The power inductor of claim 7, wherein the second magnetic core has a bottom surface disposed opposite the second mating surface, the bottom surface defining a first mounting slot and a second mounting slot, the first end portion disposed in the first mounting slot, the second end portion disposed in the second mounting slot.

9. The power inductor of claim 1, wherein the conductor and the heat sink are integrally formed.