Combined magnetic core and inductor

Abstract

The utility model relates to a combined magnetic core and an inductor. The magnetic core combination comprises an upper yoke, a lower yoke and three parallel core columns, wherein the upper yoke and the lower yoke are parallel to each other. The three core columns are respectively a left core column, a middle core column and a right core column and are vertically arranged between the upper yoke and the lower yoke side by side at intervals; one or more grooves are formed in the side surface of at least one core column; the two ends of the groove extend to the upper end and the lower end of the core column. The three core columns are sleeved with winding wires respectively to form coils, and the coils and the combined magnetic core form the inductor. According to the combined winding and the inductor, after the winding wire is sleeved with the core column, the heat dissipation space of the core column is relatively increased, the heat dissipation effect is improved, and the overall magnetic material cost is also reduced.

Description

Technical Field

[0001] The utility model relates to the field of electronic components, in particular to a combined magnetic core and inductor. Background Art

[0002] Traditional multi-inductors, such as three-phase inductor structures, have core columns made of silicon steel sheets. Due to the high-frequency application range of silicon steel sheets, a large amount of iron core is used in the design, resulting in a large volume and heavy weight of the finished product. Specifically, the prior art three-phase inductor structure has a magnetic core comprising upper and lower yokes parallel to each other and three parallel core columns between the upper and lower yokes, and three windings are wound on the three core columns respectively. The parallel upper and lower yokes are arranged horizontally, and the core column is sandwiched between the upper and lower yokes and arranged vertically. The two core columns are located on both sides, connecting the two ends of the upper and lower yokes respectively, and the middle core column is arranged at equal intervals between the two side core columns, and the two ends of the middle core column are respectively connected to the midline position of the upper and lower yokes. The prior art three-phase inductor structure has the following defects: the connection between the core column and the upper and lower yokes is unstable, and there is a risk of displacement or falling off during use. The core column is a planar design. During the assembly process, after the winding wire is wrapped around the column, the heat dissipation space of the column is reduced, and the heat dissipation effect is weakened. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a combined magnetic core and inductor to solve the problems of poor heat dissipation effect of the existing magnetic core.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A combined magnetic core comprises an upper yoke and a lower yoke which are parallel to each other, and three parallel core columns; the three core columns are respectively a left core column, a middle core column and a right core column, which are arranged vertically between the upper yoke and the lower yoke in parallel and at intervals; at least one of the core columns is provided with one or more grooves on the side surface; the two ends of the grooves extend to the upper and lower ends of the core column.

[0006] In some embodiments, the groove extends straightly on the side of the core column to form a straight groove, or bends and meanders to form a curved groove.

[0007] In some embodiments, corresponding to the grooves on the core column, one or more grooves are provided on the corresponding sides of the upper yoke and / or the lower yoke, which are connected to the grooves on the core column, and the connected grooves pass through the upper and lower ends of the corresponding sides of the entire magnetic core.

[0008] In some embodiments, the groove on the core column is a linear groove extending in the height direction of the side surface of the core column; the groove on the upper yoke and / or the lower yoke corresponds to the groove on the core column, and the connected groove is a linear groove that runs through the height of the corresponding side surface of the entire magnetic core; the groove on the core column is a linear groove extending in the height direction of the center line of the side surface of the core column; the groove on the upper yoke and / or the lower yoke is a linear groove extending in the height direction of the trisection line of the upper yoke and / or the lower yoke; the core column is a straight column, and the structure and shape of the three core columns are the same.

[0009] In some embodiments, the upper yoke and / or the lower yoke is provided with a slot on one side, specifically:

[0010] The top surface of the lower yoke is provided with three recessed slots, which are respectively matched with the lower ends of the three core columns, and the lower ends of the three core columns are respectively embedded and fixed in the slots; and / or

[0011] The bottom surface of the upper yoke is provided with three recessed slots, which are matched with the upper ends of the three core columns, and the upper ends of the three core columns are respectively embedded and fixed in the slots.

[0012] In some embodiments, the upper yoke and the lower yoke are flat plate structures, and the side surfaces of the upper yoke and the lower yoke are continuous planes or planes having the grooves or the slots.

[0013] In some embodiments, the bottom surface of the upper yoke and the top surface of the lower yoke are planes, and the top and bottom surfaces of the three core columns are planes; the top surfaces of the three core columns are in close plane contact with the bottom surface of the upper yoke and are fixed by glue; the bottom surfaces of the three core columns are in close plane contact with the top surface of the lower yoke and are fixed by glue.

[0014] In some embodiments, the middle core column is connected to the midline positions of the upper yoke and the lower yoke respectively; the left core column is connected to the left side of the upper yoke and the lower yoke, and the right core column is connected to the right side of the upper yoke and the lower yoke.

[0015] In some embodiments, the left core column is flush with or separated by a predetermined distance from the left side surface of the upper yoke and the lower yoke; the right core column is flush with or separated by a predetermined distance from the right side surface of the upper yoke and the lower yoke; the three core columns are flush with or separated by a predetermined distance from the rear side surface of the upper yoke and the lower yoke; the three core columns are flush with or separated by a predetermined distance from the front side surface of the upper yoke and the lower yoke; the predetermined distance difference ensures that the coil on the core column will not exceed the overall magnetic core after assembly, thereby reducing the volume of the inductor.

[0016] The utility model also provides an inductor, comprising a magnetic core and a winding coil; the magnetic core is a combined magnetic core as described in any of the above embodiments; the winding coil is formed by winding wires respectively wound on three core columns.

[0017] The beneficial effects of the utility model are:

[0018] The combined magnetic core of the present application has a groove on its core column, and after the winding wire package is wrapped around the core column, the heat dissipation space is increased, and the thermal effect is better; the groove saves magnetic materials and has lower costs.

[0019] Furthermore, in the combined magnetic core of the present application, a slot is provided on one side of the upper yoke and / or the lower yoke, and the upper end and / or the lower end of the core column is embedded and fixed in the corresponding slot, so that the overall device structure is more stable and will not shift or detach. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1-2 It is a stereoscopic diagram of the combined magnetic core of the embodiment of the utility model from different viewing angles.

[0021] Figure 3 It is a single-sided schematic diagram of an upper yoke or a lower yoke of a combined magnetic core according to an embodiment of the utility model. DETAILED DESCRIPTION

[0022] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0023] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a", "an", and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive and therefore specify the presence of stated features, operations, elements, and / or parts, but do not exclude the presence or addition of one or more other features, operations, elements, parts, and / or combinations thereof.

[0024] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "top", "bottom", "top surface", "bottom surface", "left side", "right side", "left side", "right side", "front side", "rear side", "front side", "rear side", "upper end", "lower end", "above", "below", "vertical", "left and right", "upper and lower", "horizontal", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation other than the orientation depicted in the figure. For example, if the device in the figure is turned over, then the element described as "below other elements or features" or "below other elements or features" will be subsequently oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both above and below orientations. The device can be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0025] Please refer to Figure 1-3 As shown, the utility model relates to a combined magnetic core 100, comprising an upper yoke 1, a lower yoke 2 and three parallel core columns 3 between the upper and lower yokes, namely a left core column 31, a middle core column 32 and a right core column 33. Three windings (not shown) are respectively wound on the three core columns 3. Figure 1 In the orientation shown, the upper yoke 1 and the lower yoke 2 are arranged horizontally, and the three core columns 3 are sandwiched between the upper yoke 1 and the lower yoke 2, arranged vertically, respectively connected between the bottom surface of the upper yoke and the top surface of the lower yoke, and the three core columns are arranged at equal intervals. The middle core column 32 is respectively connected to the midline position of the upper yoke 1 and the lower yoke 2, the left core column 31 is connected to the left side of the upper yoke 1 and the lower yoke 2, and the right core column 33 is connected to the right side of the upper yoke 1 and the lower yoke 2. The left core column 31 is flush with the left side of the upper yoke 1 and the lower yoke 2 or differs by a predetermined distance, that is, it does not exceed the left side of the upper yoke 1 and the lower yoke 2, and the right core column 33 is flush with the right side of the upper yoke 1 and the lower yoke 2 or differs by a predetermined distance, that is, it does not exceed the right side of the upper yoke 1 and the lower yoke 2. The rear side surfaces of the three core columns 3 are flush with the rear side surfaces of the upper and lower yokes or differ by a predetermined distance, that is, the rear side surfaces of the three core columns 3 do not exceed the rear side surfaces of the upper yoke 1 and the lower yoke 2. The front side surfaces of the three core columns 3 are flush with the rear side surfaces of the upper yoke 1 and the lower yoke 2 or are separated by a predetermined distance, that is, the front side surfaces of the three core columns 3 do not exceed the front side surfaces of the upper yoke 1 and the lower yoke 2. In a non-limiting example, the front side surfaces of the three core columns 3 are not flush with the front side surfaces of the upper yoke 1 and the lower yoke 2, and are installed relatively backed a certain distance between the upper yoke 1 and the lower yoke 2. The three core columns 3 have a certain distance from the corresponding sides of the upper yoke 1 and the lower yoke 2 mainly considering that the winding on the core column 3 will not exceed the overall magnetic core after assembly, so as to reduce the volume of the inductor, support the winding, and increase the stability after assembly.

[0026] In some embodiments, at least one of the three core columns 3 has one or more grooves 30 on one or more of its front, rear, left and right sides. The grooves 30 extend along the side of the core column, and the two ends of the grooves pass through the upper and lower ends of the core column.

[0027] In some embodiments, the groove 30 extends straightly on the side of the stem 3 to form a straight groove, or bends to form a curved groove. For example, the center lines of the front and rear sides of the three stems 30 are each provided with a groove 30 that runs through the entire height of the stem.

[0028] To facilitate heat dissipation and the connection between the core column and the upper and lower yokes, preferably, corresponding to the grooves 30 on the core column 3, the corresponding sides of the upper yoke 1 and / or the lower yoke 2 are provided with one or more grooves 10 / 20, which are connected to the grooves 30 on the core column 3, and the connected grooves pass through the upper and lower ends of the corresponding sides of the combined magnetic core 100.

[0029] In this embodiment: the groove 30 on the core column 3 is a linear groove extending in the height direction of the side center line of the core column 3. The groove 10 / 20 on the upper yoke 1 and / or the lower yoke 2 corresponds to the groove 30 on the core column 3, and the groove 30 is connected with the groove 10 / 20 to form a linear groove of the height that runs through the corresponding side of the entire magnetic core 100. For example, the groove 10 / 20 / 30 is a linear groove extending in the height direction of the center line of the corresponding side.

[0030] For example, the core column 3 is a vertical column, and the three core columns 3 have the same structure and shape. Each core column 3 has a groove 30 on its front and rear sides, and the groove 30 passes through the upper and lower ends of the core column along the height of the core column; the left and right sides can be designed as planes, such as rectangular planes; and the upper and lower surfaces are also planes.

[0031] In some embodiments, reference Figure 3, the upper yoke 1 and the lower yoke 2 are provided with a single-sided card slot 11 and 21. Specifically, the bottom surface of the upper yoke 1 and the top surface of the lower yoke 2 are provided with a recessed card slot 11 or 21, and the card slot 11 or 21 is adapted to the upper and lower ends of the three core columns 3. The upper and lower ends of the three core columns 3 are respectively embedded in the card slots 11 or 21 on the bottom surface of the upper yoke 1 and the top surface of the lower yoke 2, and are clamped and fixed. The rear side surfaces of the upper yoke 1 and the lower yoke 2 are correspondingly provided with three grooves 10 / 20, and the three grooves 10 / 20 are respectively connected with the grooves 30 on the rear side surfaces of the three core columns 3, forming a straight groove that runs through the upper and lower yokes and the height of the rear side surfaces of the three core columns. During assembly, the upper and lower ends of the three core columns 3 are tightly fitted with the recessed card slots 11 or 21 on the opposite sides of the upper yoke 1 and the lower yoke 2, respectively, without the need for other processes (such as glue dispensing). During use, the core column 3 is not easy to fall off or shift between the upper and lower yokes 1 and 2. The magnetic core 100 of the present application has a single-sided slot 11 / 21 on the upper and lower yokes, and two ends of the three core columns 3 are respectively embedded in the fixed slots 11 / 21, so that the magnetic core structure is stable and firm.

[0032] The upper yoke 1 and the lower yoke 2 are flat plate structures, and the side surfaces thereof are continuous planes or planes having the grooves 10 / 20 or the slots.

[0033] In other embodiments, the upper yoke 1 or the lower yoke 2 is provided with a slot on one side, specifically:

[0034] The top surface of the lower yoke 2 is provided with three recessed slots, which are respectively matched with the lower ends of the three core columns 3, and the lower ends of the three core columns 3 are respectively embedded and fixed in the slots; or,

[0035] The bottom surface of the upper yoke 1 is provided with three recessed slots, which are matched with the upper ends of the three core columns 3, and the upper ends of the three core columns are respectively embedded and fixed in the slots.

[0036] In other embodiments, the bottom surface of the upper yoke 1 and the top surface of the lower yoke 2 of the composite magnetic core 100 are planes, and the top and bottom surfaces of the three core columns 3 are planes; the top surfaces of the three core columns 3 are in close contact with the bottom surface of the upper yoke 1 and are fixed by glue; the bottom surfaces of the three core columns 3 are in close contact with the top surface of the lower yoke 2 and are fixed by glue.

[0037] When the combined magnetic core 100 of the present application is used to make an inductor, winding wires are wound around the three core columns 3 to form winding coils, and the upper and lower leads of each set of winding coils are arranged to extend in parallel along the corresponding grooves 10 / 20 on the rear side of the upper and lower yokes. Because the core column 3 is provided with grooves 30, after the winding wire is wrapped around the core column 3, the heat dissipation space is increased and the heat dissipation effect is improved. In addition, the grooves are provided on the three core columns 3, or the grooves or slots are provided on the upper and lower yokes, which saves the amount of magnetic material used and reduces the overall magnetic material cost.

[0038] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined magnetic core, comprising an upper yoke and a lower yoke parallel to each other, and three parallel core columns; the three core columns are respectively a left core column, a middle core column and a right core column, which are arranged vertically between the upper yoke and the lower yoke in parallel and spaced apart; characterized in that: One or more grooves are arranged on the side surface of at least one of the core columns; two ends of the grooves extend to the upper and lower ends of the core column.

2. The composite magnetic core according to claim 1, characterized in that: The groove extends straightly on the side of the core column to form a straight groove, or bends and meanders to form a curved groove.

3. The composite magnetic core according to claim 1, characterized in that: Corresponding to the grooves on the core column, the corresponding side surfaces of the upper yoke and / or the lower yoke are provided with one or more grooves, which are connected to the corresponding grooves on the core column, and the connected grooves pass through the upper and lower ends of the corresponding side surfaces of the entire magnetic core.

4. The combined magnetic core according to claim 3, characterized in that: The groove on the stem is a linear groove extending in the height direction of the side surface of the stem; The grooves on the upper yoke and / or the lower yoke correspond to the grooves on the core column, and the connecting grooves are straight grooves that run through the height of the corresponding side surfaces of the entire magnetic core; The groove on the core column is a linear groove extending in the height direction along the center line of the side of the core column; the groove on the upper yoke and / or the lower yoke is a linear groove extending in the height direction along the trisection line of the upper yoke and / or the lower yoke; the core column is a vertical column, and the three core columns have the same structure and shape.

5. The combined magnetic core according to any one of claims 1 to 4, characterized in that: The upper yoke and / or the lower yoke are provided with a slot on one side, specifically: The top surface of the lower yoke is provided with three recessed slots, which are respectively matched with the lower ends of the three core columns, and the lower ends of the three core columns are respectively embedded and fixed in the slots; and / or The bottom surface of the upper yoke is provided with three recessed slots, which are matched with the upper ends of the three core columns, and the upper ends of the three core columns are respectively embedded and fixed in the slots.

6. The combined magnetic core according to claim 5, characterized in that: The upper yoke and the lower yoke are flat plate structures, and the side surfaces of the upper yoke and the lower yoke are continuous planes or planes with the grooves or the slots.

7. The combined magnetic core according to any one of claims 1 to 4, characterized in that: The bottom surface of the upper yoke and the top surface of the lower yoke are planes, and the top and bottom surfaces of the three core columns are planes; the top surfaces of the three core columns are in close contact with the bottom surface of the upper yoke and are fixed by glue; the bottom surfaces of the three core columns are in close contact with the top surface of the lower yoke and are fixed by glue.

8. The composite magnetic core according to claim 1, characterized in that: The middle core column is connected to the midline positions of the upper yoke and the lower yoke respectively; the left core column is connected to the left sides of the upper yoke and the lower yoke, and the right core column is connected to the right sides of the upper yoke and the lower yoke.

9. The combined magnetic core according to any one of claims 1 to 4 or 8, characterized in that: The left core column is flush with or separated by a predetermined distance from the left side surface of the upper yoke and the lower yoke; the right core column is flush with or separated by a predetermined distance from the right side surface of the upper yoke and the lower yoke; the three core columns are flush with or separated by a predetermined distance from the rear side surface of the upper yoke and the lower yoke; the three core columns are flush with or separated by a predetermined distance from the front side surface of the upper yoke and the lower yoke; The predetermined phase difference ensures that the coil on the core column will not exceed the entire magnetic core after assembly, thereby reducing the volume of the inductor.

10. An inductor comprising a magnetic core and a winding coil; characterized in that: The magnetic core is the combined magnetic core according to any one of claims 1 to 9; the winding coil is formed by winding wires respectively wound on three core columns.

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