A dc-dc converter boost inductor

Abstract

The utility model relates to the technical field of inductance, especially a DC-DC converter boost inductance, can effectively reduce the problem of heat generation of boost inductance in BOOST circuit. The DC-DC converter boost inductance includes: the magnetic core, the magnetic core includes the lower seat body, the upper seat body opposite with the lower seat body, the mounting post of one end connection lower seat body and the other end connection upper seat body, and the connecting body of the two sides symmetrical setting of mounting post, the mounting post includes a plurality of connecting blocks, a plurality of connecting blocks are mutually superposed arrangement from the direction of lower seat body to the direction of upper seat body, have air gap between two connecting blocks of adjacent, the connecting body has installation space between mounting post, the lower seat body and upper seat body are provided with the hollow circular heat dissipation hole, the connecting block is circular ring shape, the inner hole of connecting block is opposite heat dissipation hole, the winding coil, the wire body of winding coil passes through installation space, and is continuously around the setting of mounting post.

Description

Technical Field

[0001] This utility model relates to the field of inductor technology, and in particular to a boost inductor for a DC-DC converter. Background Technology

[0002] In a BOOST circuit, the boost inductor acts as an energy conversion device that transforms electrical energy into magnetic field energy. When the MOSFET is closed, the inductor converts electrical energy into magnetic field energy and stores it. When the MOSFET is turned off, the inductor converts the stored magnetic field energy into electric field energy. This energy, after being superimposed with the input power supply voltage, is filtered by diodes and capacitors to obtain a smooth DC voltage that is supplied to the load. Since this voltage is formed by the superposition of the input power supply voltage and the inductor's magnetic field energy converted into electrical energy, the output voltage is higher than the input voltage, thus completing the boost process.

[0003] In current BOOST circuits, the boost inductor has two main drawbacks: First, it generates significant heat. Inductors produce considerable heat during operation, especially at high frequencies, which can cause the inductor temperature to rise, affecting the circuit's stability and lifespan. Second, it has low efficiency. The efficiency of the BOOST circuit is greatly affected by the inductor, which loses energy during the conversion process, especially during switching, leading to a decrease in the overall circuit efficiency. Utility Model Content

[0004] The purpose of this invention is to propose a boost inductor for a DC-DC converter, which can effectively reduce the heat generation problem of the boost inductor in the BOOST circuit.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A boost inductor for a DC-DC converter includes: a magnetic core comprising a lower body, an upper body opposite the lower body, a mounting post connected at one end to the lower body and at the other end to the upper body, and connecting bodies symmetrically arranged on both sides of the mounting post; the mounting post includes multiple connecting blocks, which are stacked and arranged from the lower body towards the upper body, with an air gap between adjacent connecting blocks, and an installation space between the connecting bodies and the mounting post; the lower body and the upper body are provided with perforated circular heat dissipation holes, and the connecting blocks are annular with their inner holes facing the heat dissipation holes; and a winding coil, the wire of which passes through the installation space and continuously surrounds the mounting post.

[0007] Based on the above scheme and as a preferred embodiment of the above scheme: insulating pads are respectively provided between the winding coil and the lower seat and the upper seat.

[0008] Based on the above scheme and as a preferred embodiment of the above scheme: an insulating pad is provided between the winding coil and the mounting post.

[0009] Based on the above solution and as a preferred embodiment of the above solution: a thermally conductive silicone spacer is provided between two adjacent connecting blocks to form the air gap.

[0010] Based on the above scheme and as a preferred embodiment of the above scheme: the outer periphery of the connecting block is circular, the side of the connecting body near the mounting post is arc-shaped, and the lower seat, the connecting body, the upper seat, and the mounting post together form a fan-shaped mounting space; the winding coil is cylindrical.

[0011] Based on the above scheme and as a preferred embodiment of the above scheme: the wire of the winding coil is flat, and the flat wire is wound around the mounting post in a single layer.

[0012] Based on the above scheme and as a preferred embodiment of the above scheme: the connecting body includes a first part and a second part of a fan-shaped structure, the first part is connected to the lower seat body, and the second part is connected to the upper seat body. When the upper seat body and the lower seat body are facing each other, the first part and the second part are aligned and assembled to form the connecting body.

[0013] Based on the above solution and as a preferred embodiment of the above solution: the first part and the second part are joined together by adhesive.

[0014] Based on the above scheme and as a preferred embodiment of the above scheme: a first mounting groove is provided on the outer side of the first part, a second mounting groove is provided on the outer side of the second part, and a connecting piece is provided, one end of the connecting piece being fixedly embedded in the first mounting groove and the other end being fixedly embedded in the second mounting groove.

[0015] Based on the above solution and as a preferred embodiment of the above solution: a mounting plate is provided on the bottom side of the lower seat, a connecting hole is provided on the outer side of the mounting plate, and the lower seat and the mounting plate are bonded together by adhesive.

[0016] In order to effectively reduce the heat generation problem of the boost inductor in the BOOST circuit, this utility model has the following beneficial effects:

[0017] The boost inductor of this DC-DC converter features a ring-shaped connecting block. Both the upper and lower housings have heat dissipation holes directly opposite the inner hole of the ring-shaped connecting block. Therefore, the inner hole of the connecting block and the heat dissipation holes together form a heat dissipation channel penetrating the magnetic core. This heat dissipation channel constitutes the internal heat dissipation structure of the boost inductor during operation, effectively reducing the heat generation problem of the boost inductor in the BOOST circuit.

[0018] In this process, multiple connecting blocks are stacked and arranged to form an air gap in the mounting column, thereby reducing the permeability of the magnetic core and increasing the saturation magnetic flux density.

[0019] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the boost inductor structure of the DC-DC converter of this utility model;

[0021] Figure 2 This is a schematic diagram of the magnetic core structure of this utility model;

[0022] Figure 3 This is an exploded view of the DC-DC converter boost inductor assembly of this utility model. Detailed Implementation

[0023] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0024] See Figure 1-3 This utility model discloses a boost inductor for a DC-DC converter, including a magnetic core 100 and a winding coil 200. The magnetic core 100 includes a lower base 101, an upper base 102 directly opposite the lower base 101, a mounting post 107 connected at one end to the lower base 101 and at the other end to the upper base 102, and connecting bodies 108 symmetrically arranged on both sides of the mounting post 107. The mounting post 107 includes multiple connecting blocks 104, which are stacked and arranged from the direction of the lower base 101 to the direction of the upper base 102. There is an air gap 105 between two adjacent connecting blocks 104. There is an installation space 114 between the connecting body 108 and the mounting post 107. The lower base 101 and the upper base 102 are provided with hollowed-out circular heat dissipation holes 103. The connecting blocks 104 are annular, and the inner hole of the connecting block 104 is directly opposite the heat dissipation hole 103. The wire (with an insulating layer or enameled wire) of the winding coil 200 passes through the installation space 114 and is continuously arranged around the mounting post 107.

[0025] In this invention, the boost inductor of the DC-DC converter has a ring-shaped connecting block 104. Both the upper body 102 and the lower body 101 are provided with heat dissipation holes 103 that correspond to the inner hole of the ring-shaped connecting block 104. Therefore, the inner hole of the connecting block 104 and the heat dissipation holes 103 together form a heat dissipation channel penetrating the magnetic core 100. This heat dissipation channel forms the internal heat dissipation structure of the boost inductor during operation, thereby effectively reducing the heat generation problem of the boost inductor in the BOOST circuit.

[0026] In this process, multiple connecting blocks 104 are stacked and arranged to form segmented air gaps 105 in the mounting posts 107, thereby reducing the permeability of the magnetic core 100 and increasing the saturation magnetic flux density.

[0027] In the embodiments of this disclosure, such as Figure 2 As shown, the outer periphery of the connecting block 104 is circular, and the side of the connecting body 108 near the mounting post 107 is arc-shaped. The lower seat 101, the connecting body 108, the upper seat 102, and the mounting post 107 together form a fan-shaped mounting space 114. The winding coil 200 is cylindrical and is embedded in the magnetic core 100. The inner coil of the coil is fitted onto the mounting post 107, and the outer coil of the coil cooperates with the connecting body 108. This makes the boost inductor structure of this DC-DC converter more compact, which can effectively reduce the product size. At the same time, the winding coil 200 of this structure, together with the fan-shaped mounting space 114, forms a better magnetic conductivity effect and reduces magnetic loss.

[0028] Furthermore, the connector 108 includes a first part 109 and a second part 111 with a fan-shaped structure (visually appearing as an arc with a certain thickness). The first part 109 is connected to the lower base 101, and the second part 111 is connected to the upper base 102. When the upper base 102 and the lower base 101 are facing each other, the first part 109 and the second part 111 are aligned to form the connector 108. Firstly, this structure of the connector 108 can reduce its thickness to a certain extent, thereby improving the product's heat dissipation capacity. Secondly, by setting the magnetic core 100 as a two-part, vertically joined connector, the assembly difficulty of the assembly operation is effectively reduced, as is the production difficulty of the magnetic core 100, thus reducing product production costs. The connection method can be achieved by bonding the joint of the first part 109 and the second part 111 with adhesive.

[0029] Furthermore, to improve installation reliability, a first mounting groove 110 is provided on the outer side of the first part 109, a second mounting groove 112 is provided on the outer side of the second part 111, and a connecting piece 113 is provided, with one end of the connecting piece 113 fixedly embedded in the first mounting groove 110 and the other end fixedly embedded in the second mounting groove 112.

[0030] In this embodiment, the wire of the coil 200 is flat and is wound in a single layer around the mounting post 107. This improves conductivity and, combined with the design of the magnetic core 100, enhances conversion efficiency.

[0031] In this embodiment of the present disclosure, to improve product safety, insulating pads 115 are respectively provided between the winding coil 200 and the lower seat 101 and the upper seat 102. Furthermore, an insulating pad layer 116 (insulating paper) is provided between the winding coil 200 and the mounting post 107.

[0032] In this embodiment of the disclosure, a thermally conductive silicone spacer 106 is provided between two adjacent connecting blocks 104 to form an air gap 105, which is beneficial for heat conduction and heat dissipation.

[0033] In this embodiment of the disclosure, in order to facilitate the installation of the product, a mounting plate 300 is provided on the bottom side of the lower body 101, preferably made of epoxy board. A connection hole 301 is provided on the outer side of the mounting plate 300, and the lower body 101 and the mounting plate 300 are bonded together by fixing adhesive.

[0034] Among them, the magnetic core 100 is a ferrite magnetic core 100 made of high-frequency magnetic permeable material.

[0035] In summary, the boost inductor of this DC-DC converter comprehensively improves the safety and stability of the product, reduces magnetic loss and temperature rise, improves conversion efficiency, and saves electricity costs.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A boost inductor for a DC-DC converter, characterized in that, include: The magnetic core (100) includes a lower base (101), an upper base (102) opposite to the lower base (101), a mounting post (107) with one end connected to the lower base (101) and the other end connected to the upper base (102), and connecting bodies (108) symmetrically arranged on both sides of the mounting post (107). The mounting post (107) includes multiple connecting blocks (104), which are stacked on top of each other from the lower seat (101) towards the upper seat (102). There is an air gap (105) between two adjacent connecting blocks (104). There is an installation space (114) between the connecting body (108) and the mounting post (107). The lower seat (101) and the upper seat (102) are provided with hollowed-out circular heat dissipation holes (103). The connecting blocks (104) are annular, and the inner hole of the connecting block (104) is directly opposite the heat dissipation hole (103). A winding coil (200) is provided, the wire of which passes through the mounting space (114) and is continuously arranged around the mounting post (107).

2. The boost inductor of the DC-DC converter according to claim 1, characterized in that, Insulating pads (115) are respectively provided between the winding coil (200) and the lower seat (101) and the upper seat (102).

3. The boost inductor of the DC-DC converter according to claim 1, characterized in that, An insulating pad (116) is provided between the winding coil (200) and the mounting post (107).

4. The boost inductor of the DC-DC converter according to claim 1, characterized in that, The air gap (105) is formed between two adjacent connecting blocks (104) by providing a thermally conductive silicone spacer (106).

5. The boost inductor of the DC-DC converter according to claim 1, characterized in that, The outer periphery of the connecting block (104) is circular, and the side of the connecting body (108) near the mounting post (107) is arc-shaped. The lower seat (101), the connecting body (108), the upper seat (102), and the mounting post (107) together form a fan-shaped mounting space (114). The winding coil (200) is cylindrical.

6. The boost inductor of the DC-DC converter according to claim 5, characterized in that, The wire of the winding coil (200) is flat and is wound in a single layer around the mounting post (107).

7. The boost inductor of the DC-DC converter according to claim 5, characterized in that, The connector (108) includes a first part (109) and a second part (111) of a fan-shaped structure. The first part (109) is connected to the lower seat (101), and the second part (111) is connected to the upper seat (102). When the upper seat (102) and the lower seat (101) are facing each other, the first part (109) and the second part (111) are aligned to form the connector (108).

8. The boost inductor of the DC-DC converter according to claim 7, characterized in that, The first part (109) and the second part (111) are joined together by adhesive.

9. The boost inductor of the DC-DC converter according to claim 7, characterized in that, The first part (109) has a first mounting groove (110) on its outer side, and the second part (111) has a second mounting groove (112) on its outer side. A connecting piece (113) is provided, with one end of the connecting piece (113) fixedly embedded in the first mounting groove (110) and the other end fixedly embedded in the second mounting groove (112).

10. The boost inductor of the DC-DC converter according to claim 1, characterized in that, The lower seat (101) is provided with a mounting plate (300) on its bottom side. The mounting plate (300) is provided with a connecting hole (301) on its outer side. The lower seat (101) and the mounting plate (300) are bonded together by adhesive.

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