Encapsulated inductor
By opening a heat dissipation slot in the potted inductor and using thermal grease to pot, the problem of low heat dissipation efficiency of traditional inductors is solved, and more efficient heat dissipation effect is achieved, improving the reliability and durability of the inductor.
Patent Information
- Application Number
- CN202420932854.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-04-30
AI Technical Summary
The heat dissipation efficiency of traditional potted inductors is low, resulting in heat accumulation at high frequencies or high currents, reducing the performance and reliability of the inductor.
A plurality of first heat dissipation grooves are opened on the fixed plate and potted with heat dissipation glue to increase the heat dissipation area of the inductor. At the same time, a fixed groove and a second heat dissipation groove are set on the partition block and connected to increase the heat dissipation glue to wrap the coil. area to improve heat dissipation effect.
By increasing the heat dissipation area and using thermally conductive grease potted rubber shells, the heat dissipation efficiency of the potted inductor is significantly improved, the operating temperature of the inductor unit is reduced, and its reliability and durability are enhanced.
Smart Images
Figure CN222354875U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of common mode inductors, in particular to a potting type inductor. Background Art
[0002] In modern electronic devices, inductors are a key electronic component that plays an important role in energy storage, filtering, and circuit delay. The design of traditional inductors usually includes a magnetic core and a set of windings, where the magnetic core provides an effective magnetic channel path and the windings are responsible for generating the required inductance value. In order to ensure that the inductor can adapt to the complex conditions in the outdoor environment, potting glue is usually used to encapsulate its internal components to prevent the intrusion of harmful substances such as moisture, dust, and chemicals. This packaging method can not only improve the insulation performance of the inductor, but also protect the internal components from damage by vibration and shock.
[0003] Nevertheless, conventional inductors generate heat during operation, especially at high currents or frequencies. The accumulation of heat can degrade the performance of the inductor or even cause damage to the inductor. Due to the thermal insulation properties of the potting compound, potted inductors have low heat dissipation efficiency, which may affect their operating performance. Therefore, developing a new inductor design that can improve heat dissipation efficiency while maintaining package strength and protection is critical to the reliability and durability of electronic devices. Utility Model Content
[0004] The utility model aims to provide a potted inductor, which has a plurality of first heat dissipation grooves on a fixed plate and is potted with heat dissipation glue to increase the heat dissipation area of the inductor, thereby improving the heat dissipation efficiency of the potted inductor.
[0005] The above-mentioned optimized structure of the utility model is realized by the following technical scheme: a potted inductor, comprising a base, an inductor unit is arranged on the base, four pins are arranged at the bottom of the base, the four pins are connected to the inductor unit, a fixing plate is arranged on the base, the inductor unit is arranged on one side of the fixing plate, at least three first heat dissipation grooves are arranged on the side of the fixing plate away from the inductor unit, a plastic shell is arranged on the top of the base, the plastic shell is potted by heat dissipation glue, and the inductor unit and the fixing plate are arranged in the plastic shell.
[0006] In some embodiments, the inductor unit includes a closed magnetic core, a first coil and a second coil are wound around the closed magnetic core, the first coil and the second coil are symmetrically arranged, and both ends of the first coil and the second coil are connected to the pin.
[0007] In some embodiments, a spacer is provided on one side of the fixed plate close to the inductor unit, one end of the spacer is fixed to the fixed plate, and the other end protrudes from the closed magnetic core. Fixed grooves are symmetrically provided at both ends of the spacer, and the first coil and the second coil are respectively provided in the two fixed grooves.
[0008] In some embodiments, the cross-section of the spacer is an isosceles trapezoid, and at least three second heat dissipation slots are provided on a side of the spacer away from the inductor unit.
[0009] In some embodiments, the two fixing grooves are both connected to the plurality of the second heat dissipation grooves.
[0010] In some embodiments, a limiting groove is provided on the top of the base, and the bottom of the closed magnetic core can be plugged into and matched with the limiting groove.
[0011] In some embodiments, a flat plate is provided at the bottom of the base, and the four pins all pass through the flat plate.
[0012] In some embodiments, connecting rods are provided through both ends of the plurality of first heat dissipation slots.
[0013] In summary, the utility model has the following beneficial effects:
[0014] The potted inductor has a plurality of first heat dissipation grooves on the fixed plate, and is potted with heat dissipation glue. The heat dissipation area of the inductor is increased through the first heat dissipation grooves, and heat is dissipated through the shell potted with the heat dissipation glue, thereby improving the heat dissipation efficiency of the potted inductor; a fixed groove and a second heat dissipation groove are arranged on the spacer, and the fixed groove, the first heat dissipation groove and the second heat dissipation groove are connected, so that the area of the first coil and the second coil wrapped by the heat dissipation glue is increased, the heat dissipation area of the first coil and the second coil is increased, and the heat dissipation effect is further improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural diagram of the utility model;
[0016] Figure 2 This is a structural diagram of the utility model without the plastic shell;
[0017] Figure 3 This is a side view of the utility model without the plastic shell;
[0018] Figure 4 This is a structural diagram of the utility model without the plastic shell and the inductor unit.
[0019] In the figure: 1, base; 11, limiting groove; 2, inductor unit; 21, closed magnetic core; 22, first coil; 23, second coil; 3, pin; 4, fixing plate; 41, first heat dissipation groove; 5, spacer; 51, fixing groove; 52, second heat dissipation groove; 6, flat plate; 7, connecting rod; 8, plastic shell. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] refer to Figure 1-4 A potted inductor comprises a base 1, an inductor unit 2 is arranged on the base 1, four pins 3 are arranged at the bottom of the base 1, and the four pins 3 are connected to the inductor unit 2, a fixing plate 4 is arranged on the base 1, and the inductor unit 2 is arranged on one side of the fixing plate 4, and the inductor unit 2 comprises a closed magnetic core 21, and a first coil 22 and a second coil 23 are wound on the closed magnetic core 21, and the first coil 22 and the second coil 23 are symmetrically arranged, and both ends of the first coil 22 and the second coil 23 are connected to the pin 3; at least three first heat dissipation grooves 41 are arranged on the side of the fixing plate 4 away from the inductor unit 2, a plastic shell 8 is arranged on the top of the base 1, and the inductor unit 2 and the fixing plate 4 are arranged in the plastic shell 8, and the plastic shell 8 is potted by heat dissipation glue, and the heat dissipation glue can be thermal conductive silicone grease, which has a high thermal conductivity and good wetting performance, can effectively reduce the interface thermal resistance, and thus provide a better heat dissipation effect. When ensuring the sealing of the potted inductor, the first heat dissipation slot 41 is filled with heat dissipation glue to increase the heat dissipation area of the inductor, and heat is dissipated through the plastic shell 8 potted with the heat dissipation glue, thereby improving the heat dissipation efficiency of the potted inductor.
[0022] A spacer block 5 is provided on one side of the fixed plate 4 close to the inductor unit 2 to isolate and insulate the two coils 5, so that a safe distance is achieved between the first coil 22 and the second coil 23 to avoid mutual influence; one end of the spacer block 5 is fixed on the fixed plate 4, and the other end protrudes from the closed magnetic core 21. Fixed grooves 51 are symmetrically provided at both ends of the spacer block 5, and the two fixed grooves 51 are respectively provided with the first coil 22 and the second coil 23. The first coil 22 and the second coil 23 can be positioned on the spacer block 5 to achieve the connection between the first coil 22 and the second coil 23 and the fixed plate 4.
[0023] In some embodiments, the cross-section of the spacer block 5 may be an isosceles trapezoid, and the two sides of the isosceles trapezoid may be arc sides, so that the two end surfaces of the spacer block 5 are closer to the winding shape of the first coil 22 and the second coil 23 on the closed magnetic core 21, which can improve the space utilization efficiency, make the overall structure more compact, reduce material usage, and maintain the stability of the structure.
[0024] In some embodiments, at least three second heat dissipation grooves 52 are provided on the side of the spacer 5 away from the inductor unit 2, and the two fixed grooves 51 are connected to the multiple second heat dissipation grooves 52. When the heat dissipation glue is used for potting, the area of the heat dissipation glue wrapped around the first coil 22 and the second coil 23 can be increased, thereby increasing the heat dissipation area of the first coil 22 and the second coil 23, and further improving the heat dissipation effect.
[0025] In some embodiments, a limiting groove 11 is provided on the top of the base 1, and the bottom of the closed magnetic core 21 can be plugged into the limiting groove 11, so that the closed magnetic core 21 can be limited on the base 1, and the first coil 22 and the second coil 23 are limited on the spacer block 5, thereby achieving the limitation of the inductance unit 2 on the base 1, which is convenient for positioning during potting.
[0026] In some embodiments, a flat plate 6 is provided at the bottom of the base 1, and the four pins 3 all pass through the flat plate 6, which can increase the distance between the base 1 and the circuit board to be installed, increase the heat dissipation space, and at the same time improve the stability between the four pins 3 and the flatness of the installation on the circuit board.
[0027] In some embodiments, connecting rods 7 are provided at both ends of the multiple first heat dissipation grooves 41 to increase the connection strength between the multiple first heat dissipation grooves 41 and prevent the heat dissipation glue from squeezing the first heat dissipation grooves 41 during the potting process, thereby causing the first heat dissipation grooves 41 to deform and affect the heat dissipation effect.
[0028] In some embodiments, coil 5 can be a flat coil, which can reduce the volume of the inductor and improve the current carrying capacity of the inductor; by winding the coil with flat wire, the inter-turn capacitance of coil 5 can be reduced, and the electromagnetic interference effect of the power supply can be more easily reduced. Under the same performance requirements, a smaller volume can be achieved. When the coil 5 is not insulated, an effective safety distance effect and insulation effect can be achieved. At the same time, automated winding can be achieved, shortening processing time and thereby reducing production costs and improving work efficiency, thereby reducing winding production costs and improving product quality.
[0029] The specific working principle is as follows:
[0030] The current of the external circuit flows into the first coil 22 and the second coil 23 through the pin 3, and the closed magnetic core 21 provides an efficient magnetic flux path, and the first coil 22 and the second coil 23 are responsible for generating the required inductance value. The first coil 22 and the second coil 23 generate heat during operation, and part of the heat is directly discharged through the plastic shell 8 encapsulated by the heat dissipation glue, and part of the heat flows to the plastic shell 8 through the first heat dissipation groove 41 on the fixing plate 4 and the second heat dissipation groove 52 on the spacer 5 to be discharged, thereby increasing the overall heat dissipation area and improving the heat dissipation efficiency, thereby reducing the operating temperature of the inductor unit and protecting the inductor operation.
[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A potted inductor, comprising a base (1), an inductor unit (2) being arranged on the base (1), four pins (3) being arranged at the bottom of the base (1), the four pins (3) being connected to the inductor unit (2), characterized in that: A fixing plate (4) is provided on the base (1), the inductor unit (2) is provided on one side of the fixing plate (4), at least three first heat dissipation slots (41) are provided on a side of the fixing plate (4) away from the inductor unit (2), a plastic shell (8) is provided on the top of the base (1), the plastic shell (8) is potted with heat dissipation glue, and the inductor unit (2) and the fixing plate (4) are provided inside the plastic shell (8).
2. The potted inductor according to claim 1, characterized in that: The inductor unit (2) comprises a closed magnetic core (21), a first coil (22) and a second coil (23) being wound around the closed magnetic core (21), the first coil (22) and the second coil (23) being symmetrically arranged, and both ends of the first coil (22) and the second coil (23) being connected to the pin (3).
3. The potted inductor according to claim 2, characterized in that: A spacer (5) is provided on one side of the fixing plate (4) close to the inductor unit (2); one end of the spacer (5) is fixed on the fixing plate (4) and the other end protrudes from the closed magnetic core (21); fixing grooves (51) are symmetrically provided at both ends of the spacer (5); the first coil (22) and the second coil (23) are respectively provided in the two fixing grooves (51).
4. The potted inductor according to claim 3, characterized in that: The cross section of the spacer (5) is an isosceles trapezoid, and at least three second heat dissipation slots (52) are provided on a side of the spacer (5) away from the inductor unit (2).
5. The potted inductor according to claim 4, characterized in that: The two fixing grooves (51) are both in communication with the plurality of the second heat dissipation grooves (52).
6. The potted inductor according to claim 2, characterized in that: The top of the base (1) is provided with a limiting groove (11), and the bottom of the closed magnetic core (21) can be plugged into and matched with the limiting groove (11).
7. The potted inductor according to claim 1, characterized in that: A flat plate (6) is provided at the bottom of the base (1), and the four pins (3) all pass through the flat plate (6).
8. The potted inductor according to claim 1, characterized in that: Connecting rods (7) are provided through both ends of the plurality of first heat dissipation slots (41).