Composite magnetic loop structure power inductor module

Abstract

The utility model relates to a combined type magnetic loop structure power inductor module, which belongs to the technical field of inductors and comprises a bottom plate, a placing groove is formed in the top surface of the bottom plate, a magnet base is placed in the placing groove, and cylindrical magnetic cores are fixedly connected to the periphery of the top surface of the magnet base. The top face of the magnet base is fixedly connected with a cross magnetic core, and a magnet cover plate is placed among the top faces of the four cylindrical magnetic cores. According to the power inductor module with the combined type magnetic loop structure, a magnetic conduction loop without an air gap is formed through the joint between the cylindrical magnetic core and the magnet cover plate, in addition, another magnetic conduction loop with an air gap is formed through the joint between the cross magnetic core and the magnet cover plate, and the magnetic conduction loop with the air gap is formed on one group of magnetic cores. The inductor has a magnetic conduction loop without an air gap and a magnetic conduction loop with an air gap, the magnetic saturation effect can be greatly delayed through the combined action of the two magnetic circuits, and the current bearing capacity of the inductor can be expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of inductors, in particular to a power inductor module with a composite magnetic loop structure. Background Art

[0002] An inductor is a component that can convert electrical energy into magnetic energy and store it. The structure of an inductor is similar to that of a transformer, but it has only one winding. An inductor has a certain inductance and only hinders changes in current. If there is no current passing through the inductor, it will try to hinder the current from flowing through it when the circuit is connected. If there is current passing through the inductor, it will try to maintain the current unchanged when the circuit is disconnected. An inductor is also called a choke, a reactor, and a dynamic reactor.

[0003] The traditional inductor magnetic circuit is mainly a single loop, which is mainly conducted through the magnetic core. Some products only use an air gap loop, which reduces the use effect. Therefore, a composite magnetic circuit structure power inductor module is proposed to solve the above problems. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a composite magnetic circuit structure power inductor module, which has the advantages of both a magnetic core conduction circuit and an air gap circuit, and solves the problem that the traditional inductor magnetic circuit is mainly based on a single circuit, mainly through the magnetic core conduction circuit, and some products only use an air gap circuit, which reduces the use effect.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a composite magnetic circuit structure power inductor module, comprising a base plate, a top surface of the base plate is provided with a placement groove, a magnet base is placed inside the placement groove, and a cylindrical magnetic core is fixedly connected to the top surface of the magnet base on all four sides.

[0006] A cross magnetic core is fixedly connected to the top surface of the magnet base, a magnet cover is placed between the top surfaces of the four cylindrical magnetic cores, the outer peripheral walls of the four cylindrical magnetic cores are each covered with a coil, eight clearance holes are opened on the top surface of the bottom plate, the two ends of the four coils extend to the inside of the eight clearance holes respectively, the inside of the four clearance holes are each fixedly connected to a pin with one end passing through the bottom plate and extending to the bottom thereof, the pin is fixedly connected to the coil, and both ends of the four coils are each covered with a protective ring.

[0007] The bottom plate is provided with a positioning assembly for fixing the magnet cover plate.

[0008] The bottom plate is provided with a supporting assembly for supporting the positioning assembly.

[0009] Furthermore, the protective ring is fixedly connected to the bottom plate, and the coil is gap-matched with the clearance hole.

[0010] Furthermore, the cross-shaped core is located between the four cylindrical cores, and the height of the cross-shaped core is lower than that of the cylindrical cores.

[0011] Furthermore, the positioning assembly includes two telescopic rods. Both of the two telescopic rods are fixedly connected to the top surface of the bottom plate. The top surfaces of the two telescopic rods are both fixedly connected with support plates. Springs respectively fixedly connected to the support plates and the bottom plate are sleeved on the outer peripheral walls of the two telescopic rods. The top surfaces of the two support plates are both fixedly connected with fixing plates. Positioning rods are fixedly connected to the bottom surfaces of the two fixing plates. Two positioning holes are formed in the top surface of the magnet cover plate, and the positioning rods extend into the interior of the positioning holes.

[0012] Furthermore, the fixing plate is an L-shaped plate. The fixing plate is in contact with the magnet cover plate, and the positioning rod and the positioning hole are in clearance fit.

[0013] Furthermore, the telescopic rod is composed of a sleeve bin and a moving rod. One end of the moving rod penetrates and extends into the interior of the sleeve bin. A limiting block located inside the sleeve bin is fixedly connected to the outer side of the moving rod. A through hole adapted to the moving rod is formed in one side of the sleeve bin.

[0014] Furthermore, the support assembly includes two mounting plates. The two mounting plates are respectively fixedly connected to the left side surface and the right side surface of the bottom plate. Support grooves are formed in the opposite side surfaces of the two mounting plates. Support blocks are fixedly connected to the side surfaces of the two support plates away from the magnet cover plate. The two support blocks respectively extend into the interiors of the two support grooves. Rubber pads are fixedly connected to the front and back surfaces of the two support blocks.

[0015] Furthermore, the support block is in sliding connection with the support groove, and the rubber pad is in contact with the support groove.

[0016] Compared with the prior art, the technical solution of the present application has the following beneficial effects:

[0017] 1. In this composite magnetic circuit structure power inductor module, through the engagement between the cylindrical core and the magnet cover plate, a magnetic conduction loop without an air gap is formed. In addition, through the engagement between the cross-shaped core and the magnet cover plate, another magnetic conduction loop with an air gap is formed. On a group of cores, there are both a magnetic conduction loop without an air gap and a magnetic conduction loop with an air gap. The combined action of the two magnetic paths can greatly delay the occurrence of the magnetic saturation effect, expand the current-carrying capacity of the inductor, reduce the heat generated during the operation of the inductor, that is, reduce the loss of the inductor. By protecting both ends of the coil with a protective ring, the insulation withstand voltage performance of the inductor is further improved;

[0018] 2. The power inductor module with a composite magnetic circuit structure fixes the magnet cover plate through the clearance fit between the positioning rod and the positioning hole, improving the stability of the magnet cover plate. Under the action of the spring, it supports the fixing plate, improving the stability of the fixing plate. At the same time, it supports the support plate through the sliding connection between the support block and the support groove, which is more convenient and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the present utility model;

[0020] Figure 2 is Figure 1 an enlarged schematic diagram of the structure of A in

[0021] Figure 3 is Figure 1 an enlarged schematic diagram of the structure of B in

[0022] Figure 4 It is a top view schematic diagram of the cross-shaped magnetic core in the structure of the present utility model;

[0023] Figure 5 It is a front view schematic diagram of the structure of the present utility model.

[0024] In the figure: 1 bottom plate, 2 relief hole, 3 protective ring, 4 telescopic rod, 5 spring, 6 support plate, 7 fixing plate, 8 magnet cover plate, 9 cylindrical magnetic core, 10 cross-shaped magnetic core, 11 coil, 12 magnet base, 13 support groove, 14 placement groove, 15 mounting plate, 16 pin, 17 positioning rod, 18 positioning hole, 19 rubber pad, 20 support block. SPECIFIC EMBODIMENTS

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] Embodiment 1: Please refer to Figures 1-5 , a power inductor module with a composite magnetic circuit structure in this embodiment includes a bottom plate 1. A placement groove 14 is opened on the top surface of the bottom plate 1, and a magnet base 12 is placed inside the placement groove 14. Cylindrical magnetic cores 9 are fixedly connected to the peripheries of the top surface of the magnet base 12.

[0027] The top surface of the magnet base 12 is fixedly connected with a cross-shaped magnetic core 10. A magnet cover plate 8 is placed between the top surfaces of the four cylindrical magnetic cores 9. Coils 11 are sleeved on the outer peripheral walls of the four cylindrical magnetic cores 9. The top surface of the bottom plate 1 is provided with eight relief holes 2. The two ends of the four coils 11 respectively extend into the eight relief holes 2. Inside each of the four relief holes 2, there is a pin 16 fixedly connected to one end that penetrates the bottom plate 1 and extends to its bottom. The pin 16 is fixedly connected to the coil 11. Protective rings 3 are sleeved on both ends of the four coils 11.

[0028] Among them, the protective ring 3 is fixedly connected to the bottom plate 1. The coil 11 and the relief hole 2 are in clearance fit. The cross-shaped magnetic core 10 is located between the four cylindrical magnetic cores 9, and the height of the cross-shaped magnetic core 10 is lower than that of the cylindrical magnetic cores 9.

[0029] It should be noted that the four coils are four inductors, rather than a single inductor. Multiple inductors on one entity are usually called an inductor module.

[0030] Specifically, the magnet base 12 is placed into the placement groove 14. Under the action of the placement groove 14, the magnet base 12 is restricted. The coil 11 is sleeved on the cylindrical magnetic core 9, and the two ends of the coil 11 enter into the relief hole 2. The coil 11 is fixedly connected to the pin 16. The magnet cover plate 8 is placed on the top surface of the cylindrical magnetic core 9 and fits with it. Through the cooperation between the cylindrical magnetic core 9 and the magnet cover plate 8, a magnetic core conduction loop is formed, and through the cooperation between the cross-shaped magnetic core 10 and the magnet cover plate 8, an air gap loop is formed, having both a magnetic core conduction loop and an air gap loop.

[0031] Embodiment Two: Please refer to Figures 1-5 , in this embodiment, on the basis of Embodiment One, it includes a positioning component on the bottom plate 1. The positioning component includes two telescopic rods 4. Both of the two telescopic rods 4 are fixedly connected to the top surface of the bottom plate 1. The top surfaces of the two telescopic rods 4 are both fixedly connected with support plates 6. Spring 5 is sleeved on the outer peripheral walls of the two telescopic rods 4 and is fixedly connected to the support plate 6 and the bottom plate 1 respectively. The top surfaces of the two support plates 6 are both fixedly connected with fixing plates 7. The bottom surfaces of the two fixing plates 7 are both fixedly connected with positioning rods 17. The top surface of the magnet cover plate 8 is provided with two positioning holes 18, and the positioning rods 17 extend into the positioning holes 18.

[0032] Among them, the fixing plate 7 is an L-shaped plate. The fixing plate 7 fits with the magnet cover plate 8. The positioning rod 17 and the positioning hole 18 are in clearance fit. The telescopic rod 4 is composed of a sleeve and a moving rod. One end of the moving rod penetrates and extends into the sleeve. A limiting block located inside the sleeve is fixedly connected to the outside of the moving rod. A through hole adapted to the moving rod is opened on one side of the sleeve.

[0033] Specifically, pull the support plate 6 so that the support plate 6 drives the fixed plate 7 to move, and the positioning rod 17 moves. The positioning rod 17 and the positioning hole 18 are located on the same center line. Loosen the fixed plate 7, and the elasticity of the spring 5 pushes the positioning rod 17 into the interior of the positioning hole 18. The magnet cover plate 8 is fixed by the clearance fit between the positioning rod 17 and the positioning hole 18.

[0034] Example 3: Please refer to Figures 1-5 In this embodiment, on the basis of the first and second embodiments, a support assembly is provided on the base plate 1, and the support assembly includes two mounting plates 15, and the two mounting plates 15 are respectively fixedly connected to the left side and the right side of the base plate 1, and the two mounting plates 15 have support grooves 13 on the opposite sides thereof, and the two support plates 6 have support blocks 20 fixedly connected on the sides thereof away from the magnet cover plate 8, and the two support blocks 20 extend to the inside of the two support grooves 13, respectively, and the front and back sides of the two support blocks 20 are fixedly connected to rubber pads 19.

[0035] The support block 20 is slidably connected to the support groove 13 , and the rubber pad 19 is fitted to the support groove 13 .

[0036] Specifically, the support plate 6 is supported by the sliding connection between the support block 20 and the support groove 13 to improve the stability of the support plate 6, and the support block 20 is supported by the fit between the rubber pad 19 and the support groove 13 to improve the stability of the support block 20.

[0037] The working principle of the above embodiment is:

[0038] Pull the support plate 6, so that the support plate 6 drives the fixed plate 7 to move, so that the positioning rod 17 moves, and the support plate 6 is supported by the sliding connection between the support block 20 and the support groove 13 to improve the stability of the support plate 6. The support block 20 is supported by the fit between the rubber pad 19 and the support groove 13 to improve the stability of the support block 20. The magnet base 12 is placed into the placement groove 14. Under the action of the placement groove 14, the magnet base 12 is restricted. The coil 11 is sleeved on the cylindrical magnetic core 9, and the two ends of the coil 11 enter the inside of the make way hole 2. The ring 11 and the pin 16 are fixedly connected, the magnet cover 8 is placed on the top surface of the cylindrical magnetic core 9 and fits it, the positioning rod 17 and the positioning hole 18 are located on the same center line, the fixing plate 7 is loosened, and the elasticity of the spring 5 pushes the positioning rod 17 into the interior of the positioning hole 18, and the magnet cover 8 is fixed by the clearance fit between the positioning rod 17 and the positioning hole 18. A magnetic core conduction circuit is formed by the fit between the cylindrical magnetic core 9 and the magnet cover 8, and an air gap circuit is formed by the fit between the cross magnetic core 10 and the magnet cover 8, which has both a magnetic core conduction circuit and an air gap circuit.

[0039] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0040] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A composite magnetic circuit structure power inductor module, comprising a bottom plate (1), characterized in that: The top surface of the bottom plate (1) is provided with a placement groove (14), and a magnet base (12) is placed inside the placement groove (14). Cylindrical magnetic cores (9) are fixedly connected to the periphery of the top surface of the magnet base (12). A cross-shaped magnetic core (10) is fixedly connected to the top surface of the magnet base (12). A magnet cover plate (8) is placed between the top surfaces of the four cylindrical magnetic cores (9). Coils (11) are sleeved on the outer peripheral walls of the four cylindrical magnetic cores (9). The top surface of the bottom plate (1) is provided with eight relief holes (2). The two ends of the four coils (11) respectively extend into the eight relief holes (2). Inside the four relief holes (2), pins (16) are fixedly connected, with one end of each pin (16) passing through the bottom plate (1) and extending to its bottom. The pins (16) are fixedly connected to the coils (11). Protective rings (3) are sleeved on both ends of the four coils (11). A positioning component is provided on the bottom plate (1), and a support component is provided on the bottom plate (1).

2. The power inductor module with a composite magnetic circuit structure according to claim 1, wherein: The protective ring (3) is fixedly connected to the bottom plate (1), and the coil (11) and the relief hole (2) are in clearance fit.

3. The power inductor module with a composite magnetic circuit structure according to claim 2, characterized in that: The cross-shaped magnetic core (10) is located between the four cylindrical magnetic cores (9), and the height of the cross-shaped magnetic core (10) is lower than the height of the cylindrical magnetic cores (9).

4. A composite magnetic circuit structure power inductor module according to claim 1, characterized in that: The positioning component includes two telescopic rods (4). The two telescopic rods (4) are both fixedly connected to the top surface of the bottom plate (1). Support plates (6) are fixedly connected to the top surfaces of the two telescopic rods (4). Springs (5) are sleeved on the outer peripheral walls of the two telescopic rods (4), and are respectively fixedly connected to the support plates (6) and the bottom plate (1). Fixing plates (7) are fixedly connected to the top surfaces of the two support plates (6). Positioning rods (17) are fixedly connected to the bottom surfaces of the two fixing plates (7). The top surface of the magnet cover plate (8) is provided with two positioning holes (18), and the positioning rods (17) extend into the positioning holes (18).

5. The power inductor module with a composite magnetic circuit structure according to claim 4, characterized in that: The fixing plate (7) is an L-shaped plate. The fixing plate (7) is in contact with the magnet cover plate (8), and the positioning rod (17) and the positioning hole (18) are in clearance fit.

6. The power inductor module with a composite magnetic circuit structure according to claim 4, characterized in that: The telescopic rod (4) is composed of a sleeve bin and a moving rod. One end of the moving rod passes through and extends into the sleeve bin. A limiting block located inside the sleeve bin is fixedly connected to the outside of the moving rod. A through hole adapted to the moving rod is provided on one side of the sleeve bin.

7. A composite magnetic circuit structure power inductor module according to claim 4, characterized in that: The support component includes two mounting plates (15). The two mounting plates (15) are respectively fixedly connected to the left side surface and the right side surface of the bottom plate (1). Support grooves (13) are provided on the opposite side surfaces of the two mounting plates (15). Support blocks (20) are fixedly connected to the side surfaces of the two support plates (6) away from the magnet cover plate (8). The two support blocks (20) respectively extend into the two support grooves (13). Rubber pads (19) are fixedly connected to the front and back surfaces of the two support blocks (20).

8. The power inductor module with a composite magnetic circuit structure according to claim 7, characterized in that: The support block (20) is in sliding connection with the support groove (13), and the rubber pad (19) is in contact with the support groove (13).

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