Block inductor

Abstract

The block inductor comprises magnetic core plates, a magnetic core middle column, a coil and a heat conduction part, the coil is wound on the periphery of the magnetic core middle column, the magnetic core plates are arranged at the two ends of the magnetic core middle column respectively and attached to the end wall of the magnetic core middle column, the heat conduction part comprises at least two silica gel sheets and a heat dissipation plate, and the heat dissipation plate is arranged between the silica gel sheets and the heat dissipation plate. The two silica gel sheets are arranged on the side walls, away from each other, of the two magnetic core plates respectively, the silica gel sheets cover the sides, away from the magnetic core middle column, of the magnetic core plates in an attached mode, and the heat dissipation plates are arranged on the sides, away from the magnetic core plates, of the silica gel sheets and attached to the silica gel sheets. According to the block-shaped inductor, the silica gel sheet is matched with the heat dissipation plate, so that the overall weight of the block-shaped inductor can be reduced while overall heat dissipation of the block-shaped inductor is achieved.

Description

Technical Field

[0001] This utility model relates to the field of inductors, and in particular to a block inductor. Background Technology

[0002] With the continuous improvement of the performance and integration of electronic devices, bulk inductors, as core components of power management and signal processing circuits, have their packaging technology directly affecting product performance and reliability. Currently, the industry widely adopts a bulk inductor encapsulation solution with an aluminum shell and internal thermally conductive adhesive. By filling the gap between the inductor and the aluminum shell with thermally conductive adhesive, the heat generated by the inductor during operation is conducted to the surface of the aluminum shell, thereby achieving heat dissipation.

[0003] From a cost and process perspective, the potting process involves multiple steps such as glue filling and curing. It requires not only specialized equipment but also precise control of process parameters, which makes the production process cumbersome, increases energy consumption, and significantly raises manufacturing costs. In terms of application compatibility, the use of thermally conductive adhesive and aluminum shell significantly increases the weight of the product, resulting in a larger weight for the molded block inductor. Utility Model Content

[0004] To reduce the overall weight of a bulk inductor, this invention provides a bulk inductor.

[0005] This utility model provides a technical solution that adopts the following approach:

[0006] A block inductor includes a magnetic core plate, a magnetic core column, a coil, and a heat-conducting part. The coil is wound around the outer periphery of the magnetic core column. The magnetic core plate is respectively disposed at both ends of the magnetic core column and is attached to the end wall of the magnetic core column. The heat-conducting part includes a silicone sheet and a heat sink. There are at least two silicone sheets. The two silicone sheets are respectively disposed on the side walls of the two magnetic core plates that are far away from each other. The silicone sheets are attached to and cover the side of the magnetic core plate away from the magnetic core column. The heat sink is disposed on the side of the silicone sheet away from the magnetic core plate and is attached to the silicone sheet.

[0007] The heat generated by the coil is transferred to the core column. When the core column heats up, it transfers the heat to the core plates at both ends. The heat from the core plates is then directed to the silicone sheet, which in turn transfers the heat to the heat sink. This process transfers the heat from the coil and the core column to the heat sink and dissipates it outside the bulk inductor. The combination of the silicone sheet and the heat sink not only achieves overall heat dissipation of the bulk inductor but also reduces its overall weight. Furthermore, during assembly, heat dissipation of the bulk inductor can be achieved simply by fixing the silicone sheet and the heat sink to the ends of the core plate, which saves on the assembly process and greatly reduces the difficulty of producing inductors.

[0008] Preferably, the heat-conducting part further includes a silicone ring, which is sleeved on the outer periphery of the magnetic core column and located in the gap between the magnetic core column and the coil. The two ends of the silicone ring abut against the two magnetic core plates respectively.

[0009] A silicone ring is placed between the coil and the core post to enclose the core, which makes it easier for the heat of the coil to be transferred to the core post, increases the contact heat dissipation area of ​​the coil, and allows the heat of the coil to be transferred to the outside more fully, which helps to improve the heat dissipation efficiency of the coil.

[0010] Preferably, the silicone ring is attached to and covers the peripheral wall of the central column of the magnetic core.

[0011] Covering the periphery of the magnetic core with a silicone ring helps improve the heat dissipation rate of the coil and enhances the overall heat dissipation effect of the inductor.

[0012] Preferably, there are two magnetic core columns, and each end of the magnetic core column is provided with an epoxy plate for isolating the coil and the magnetic core plate. The epoxy plate has a clearance hole for the end of the magnetic core column to pass through and abut against the magnetic core plate.

[0013] A silicone ring and a coil are fitted around the outer periphery of the magnetic core column. The silicone ring and the coil restrict the relative movement between the magnetic core column and the epoxy plate, so that the epoxy plate is confined to the end of the magnetic core column, thereby isolating the coil and the magnetic core plate. At the same time, the epoxy plate can also restrict the two magnetic core columns from moving towards each other, and restrict the two magnetic core columns to maintain a stable certain distance.

[0014] Preferably, the heat sink is an aluminum plate.

[0015] Aluminum plates have good heat dissipation properties, which makes heat dissipation of the inductor smoother.

[0016] Preferably, the two heat sinks are fixed together by screws and nuts.

[0017] Two heat sinks are secured by screws that pass through them and nuts that tighten the screws. This clamps the heat sinks together, creating a structure including a silicone pad, preventing the inductor from easily separating. The silicone pad, positioned between the heat sink and the core plate, increases friction, preventing displacement on the screw's perpendicular plane. Furthermore, the use of an aluminum plate and silicone pad instead of a traditional aluminum casing and potting compound significantly reduces the overall weight and cost of the bulk inductor.

[0018] In summary, this utility model has the following beneficial technical effects:

[0019] The heat generated by the coil is transferred to the core column. When the core column heats up, it transfers the heat to the core plates at both ends. The heat from the core plates is then directed to the silicone sheet, which in turn transfers the heat to the heat sink. This process transfers the heat from the coil and the core column to the heat sink and dissipates it outside the bulk inductor. The combination of the silicone sheet and the heat sink not only achieves overall heat dissipation of the bulk inductor but also reduces its overall weight. Furthermore, during assembly, heat dissipation of the bulk inductor can be achieved simply by fixing the silicone sheet and the heat sink to the ends of the core plate, which saves on the assembly process and greatly reduces the difficulty of producing inductors. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a block inductor according to the present invention.

[0021] Figure 2 This is an exploded view of a block inductor according to this utility model.

[0022] Explanation of reference numerals in the attached diagram: 1. Magnetic core plate; 2. Magnetic core center column; 3. Coil; 4. Silicone sheet; 5. Heat sink; 6. Silicone ring; 7. Epoxy board; 8. Clearance hole; 9. Screw. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1-2 The present invention will be described in further detail below.

[0024] This utility model discloses a block inductor.

[0025] Reference Figure 1 A block-shaped inductor includes a magnetic core plate 1, a magnetic core column 2, a coil 3, and a heat-conducting part. The coil 3 is wound around the outer periphery of the magnetic core column 2. The magnetic core plate 1 is respectively disposed at both ends of the magnetic core column 2 and is attached to the end wall of the magnetic core column 2. The heat-conducting part includes a silicone sheet 4 and a heat sink 5. There are at least two silicone sheets 4. The two silicone sheets 4 are respectively disposed on the side walls of the two magnetic core plates 1 that are far away from each other. The silicone sheets 4 are attached to and cover the side of the magnetic core plate 1 that is far away from the magnetic core column 2. The heat sink 5 is disposed on the side of the silicone sheet 4 that is far away from the magnetic core plate 1 and is attached to the silicone sheet 4.

[0026] The heat generated by coil 3 is transferred to the core post 2. When the core post 2 heats up, it transfers the heat to the core plates 1 at both ends. The heat from the core plates 1 is then directed to the silicone sheet 4, which in turn transfers the heat to the heat sink 5. Thus, the heat from coil 3 and core post 2 is transferred to the heat sink 5 and dissipated outside the block inductor. The cooperation between the silicone sheet 4 and the heat sink 5 not only achieves overall heat dissipation of the block inductor but also reduces its overall weight. Furthermore, during assembly, heat dissipation of the block inductor can be achieved simply by fixing the silicone sheet 4 and the heat sink 5 to the ends of the core plate 1, which saves on the assembly process and greatly reduces the difficulty of producing inductors.

[0027] Reference Figure 1 as well as Figure 2 In this embodiment, the heat-conducting part also includes a silicone ring 6, which is sleeved on the outer periphery of the magnetic core column 2. The silicone ring 6 is located in the gap between the magnetic core column 2 and the coil 3, and the two ends of the silicone ring 6 abut against the two magnetic core plates 1 respectively.

[0028] A silicone ring 6 is placed between the coil 3 and the magnetic core column 2 to wrap the magnetic core, thereby making it easier for the heat of the coil 3 to be transferred to the magnetic core column 2, increasing the contact heat dissipation area of ​​the coil 3, and making the heat of the coil 3 more fully transferred to its outside, which is beneficial to improving the heat dissipation efficiency of the coil 3.

[0029] Reference Figure 1 as well as Figure 2 In this embodiment, the silicone ring 6 is attached to and covers the peripheral wall of the central column 2 of the magnetic core.

[0030] The silicone ring 6 covers the peripheral wall of the magnetic core post 2, which helps to improve the heat dissipation rate of the coil 3 and improve the overall heat dissipation effect of the inductor.

[0031] Reference Figure 1 as well as Figure 2 In this embodiment, there are two magnetic core columns 2. Both ends of the magnetic core column 2 are provided with epoxy plates 7 for isolating the coil 3 and the magnetic core plate 1. The epoxy plates 7 have clearance holes 8 so that the ends of the magnetic core column 2 can pass through and abut against the magnetic core plate 1. The diameter of the clearance holes 8 is the same as the diameter of the magnetic core column 2.

[0032] A silicone ring 6 and a coil 3 are fitted around the outer periphery of the magnetic core column 2. The silicone ring 6 and the coil 3 restrict the relative movement between the magnetic core column 2 and the epoxy plate 7, so that the epoxy plate 7 is restricted to the end of the magnetic core column 2, thereby isolating the coil 3 and the magnetic core plate 1. At the same time, the epoxy plate 7 can also restrict the two magnetic core columns 2 from moving towards each other, and restrict the two magnetic core columns 2 to maintain a stable certain distance.

[0033] Reference Figure 1 as well as Figure 2 In this embodiment, the heat sink 5 is an aluminum plate.

[0034] Aluminum plates have good heat dissipation properties, which makes heat dissipation of the inductor smoother.

[0035] Reference Figure 1 as well as Figure 2 In this embodiment, the two heat sinks 5 are fixed together by screws 9 and nuts.

[0036] Screws 9 pass through the two heat sinks 5, and nuts are used to secure the screws 9, thus fixing the two heat sinks 5 together. This clamps the two heat sinks 5 together, along with a series of structures including a silicone sheet 4, making the inductor less prone to separation. The silicone sheet 4 is placed between the heat sink 5 and the magnetic core plate 1, increasing the friction between them and preventing displacement on the vertical plane of screws 9. Furthermore, the use of an aluminum plate and silicone sheet 4 replaces the traditional aluminum shell and potting adhesive, significantly reducing the overall weight and cost of the bulk inductor.

[0037] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A block-shaped inductor, characterized in that: The device includes a magnetic core plate, a magnetic core column, a coil, and a heat-conducting part. The coil is wound around the outer periphery of the magnetic core column. The magnetic core plates are respectively disposed at both ends of the magnetic core column and are attached to the end walls of the magnetic core column. The heat-conducting part includes a silicone sheet and a heat sink. There are at least two silicone sheets, which are respectively disposed on the side walls of the two magnetic core plates that are far apart from each other. The silicone sheets are attached to and cover the side of the magnetic core plate that is far away from the magnetic core column. The heat sink is disposed on the side of the silicone sheet that is far away from the magnetic core plate and is attached to the silicone sheet.

2. The block inductor according to claim 1, characterized in that: The heat-conducting part also includes a silicone ring, which is sleeved on the outer periphery of the magnetic core column. The silicone ring is located in the gap between the magnetic core column and the coil, and the two ends of the silicone ring abut against the two magnetic core plates respectively.

3. The block inductor according to claim 2, characterized in that: The silicone ring is attached to and covers the peripheral wall of the central column of the magnetic core.

4. The block inductor according to claim 1, characterized in that: The magnetic core has two columns, and each end of the magnetic core has an epoxy plate for isolating the coil and the magnetic core plate. The epoxy plate has a clearance hole for the end of the magnetic core to pass through and abut against the magnetic core plate.

5. The block inductor according to claim 4, characterized in that: The heat sink is made of aluminum.

6. The block inductor according to claim 5, characterized in that: The two heat sinks are fixed together by screws and nuts.

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