Inductor

Abstract

An inductor including a pot-type magnetic core and a set of bus bars, where the pot-type magnetic core includes a first half and a second half, at least one of the first half and the second half includes a central post and the first half and the second half are mounted oppositely in alignment with each other to form an annular inner space around the central post; the group of bus bars includes a positive bus bar and a negative bus bar, where the positive bus bar and the negative bus bar include winding portions arranged in parallel in an internal space of the pot-type magnetic core in a staggered manner and end portions extending from opposite ends of the winding portions out of the internal space of the pot-type magnetic core to an exterior of the pot-type magnetic core. Wherein the winding portion of the positive bus bar and the winding portion of the negative bus bar axially face each other and are spaced at a uniform axial pitch.

Description

TECHNICAL FIELD

[0001] The present invention relates to the field of inductors. In particular, to an inductor suitable for high voltage high inductance scenarios. BACKGROUND

[0002] EMC filters are typically applied in high voltage high inductance scenarios, which can suppress current noise and high frequency harmonics generated by switching power supplies. Two main components in EMC filters are inductors and capacitors, wherein the inductor is typically composed of a magnetic core with a central through hole and a set of bus bars extending through the central through hole of the magnetic core, which is usually implemented in the form of two parallel copper bars for the purpose of being suitable for high voltage high inductance scenarios, while the magnetic core can be a ferrite or a ferrimagnetic core, which generates inductance under the action of the magnetic field established around the bus bars when the current flowing through the bus bars changes.

[0003] The size of the inductance that can be generated by an inductor is generally related to the number of turns of the bus bars exponentially, specifically, is proportional to the square of the number of turns of the bus bars. Therefore, a scheme has emerged to wind the bus bars into multiple turns. In low voltage scenarios, the bus bars are usually formed in the form of metal wires, such as copper wires, which are convenient to wind into multiple turns, while in high voltage high inductance scenarios, such as in EMC filters, the bus bars are usually made into copper bars with large cross-sectional dimensions, which are not convenient to be wound into multiple turns like copper wires, and even if the bus bars in the form of copper bars are wound, it is difficult to accommodate them in the magnetic core of the inductor without increasing the volume of the inductor.

[0004] Therefore, there is a need for an improved inductor suitable for high voltage high inductance scenarios, which should increase the number of turns of the bus bars as much as possible to increase the size of the inductance that can be generated without increasing the volume of the inductor. SUMMARY

[0005] To achieve the above object, the present invention proposes an inductor comprising a pot-type magnetic core and a set of bus bars, wherein:

[0006] The pot-type magnetic core comprises a first half and a second half, at least one of the first half and the second half comprises a central column and is installed in opposition to each other to form an annular internal space around the central column;

[0007] The set of bus bars comprises positive bus bars and negative bus bars, the positive bus bars and the negative bus bars comprise winding portions arranged in parallel to each other within the internal space of the pot-type magnetic core and end portions extending out of the internal space of the pot-type magnetic core to the outside of the pot-type magnetic core from opposite ends of the winding portions, wherein the winding portions of the positive bus bars and the winding portions of the negative bus bars axially face each other and are uniformly spaced by an axial spacing.

[0008] The first half and the second half can each comprise an end face portion formed with a through opening and a circumferential portion extending perpendicularly from an edge of the respective end face portion, and a central column extending from a center of the end face portion in the same extension direction as the circumferential portion, wherein, when the first half and the second half are mounted in alignment with respect to each other, the end face portions, the circumferential portions and the central columns jointly enclose an interior space of the pot core, and the end portions of the set of bus bars extend through the openings to the outside of the pot core.

[0009] Optionally, the central columns are made of the same magnetic material as the circumferential portions and form a solid column structure, and, in case the first half and the second half each comprise a central column, the central columns are aligned in close proximity to each other when the first half and the second half are mounted in alignment with respect to each other.

[0010] Optionally, the winding portions of the positive bus bars and the winding portions of the negative bus bars are axially facing each other without a radial offset.

[0011] Optionally, the adjacent end portions of the positive bus bars and the negative bus bars are arranged parallel to each other and facing each other with a set radial gap. The radial gap is determined in accordance with a required electrical gap between the positive bus bars and the negative bus bars.

[0012] Optionally, the winding portions of the positive bus bars and the negative bus bars are arranged in parallel in an interleaved manner such that the axial spacing of the winding portions of the positive bus bars and the winding portions of the negative bus bars and the radial gap of the adjacent end portions of the positive bus bars and the negative bus bars are equal and remain constant.

[0013] Optionally, the pitch of the winding portions of the positive bus bars is equal to the pitch of the winding portions of the negative bus bars.

[0014] The dimensions of the first half and the second half and the number of turns of the winding portions can be determined by the required inductance size of the inductor.

[0015] Optionally, the surfaces of the set of bus bars comprise an insulation layer, and / or the inductor comprises an insulation structure, wherein the insulation structure is configured to fill a space between the set of bus bars and the pot core. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 shows an exploded view of an inductor according to one embodiment of the present application;

[0017] Figure 2 shows a perspective view of an assembled Figure 1 inductor according to one embodiment of the present application;

[0018] Figure 3 shows a side view of two halves of a pot core according to one embodiment of the present application;

[0019] Figure 4 shows a correspondingFigure 1 A bottom view of the winding portions of the two busbars being arranged in parallel with each other in a staggered manner;

[0020] Figure 5A Shown corresponding to Figure 2 A perspective view of an inductor with one half of the pot core omitted;

[0021] Figure 5B Shown corresponding to Figure 5A Left side view of ; and

[0022] Figure 5C Shown corresponding to Figure 5A Right side view.

[0023] Description of Reference Numerals

[0024] 10 Inductors

[0025] 100 Pot Cores

[0026] 110 First Half

[0027] 120 Second Half

[0028] 111, 121 end face

[0029] 112, 122 circumferential part

[0030] 113, 123 opening

[0031] 114, 124 central column

[0032] 200 busbars

[0033] 210 positive bus

[0034] 220 negative bus

[0035] 211, 221 winding part

[0036] 212, 213, 222, 223 end DETAILED DESCRIPTION

[0037] Figure 1 shows an exploded view of an unassembled inductor according to one embodiment of the present invention, Figure 2 Shown assembled Figure 1 3D view of an inductor. Figure 1 and Figure 2 , the inductor 10 according to the present invention includes a pot-type magnetic core 100 and a set of bus bars 200 .

[0038] Specifically, Figure 1The pot core 100 is shown to comprise two halves: a first half 110 and a second half 120, and at least one of the first half 110 and the second half 120 comprises a central post. For ease of manufacture of the pot core 100, the two halves 110 and 120 can have identical structure and each have a central post 114, 124 (as shown in Figure 1 and Figure 3 In the assembled inductor 10, the first half 110 and the second half 120 are aligned to each other to form an annular inner space around the central post 114, 124. In case only one of the first half 110 and the second half 120 comprises a central post, the central post can be formed as a complete central post formed when the central posts 114, 124 shown in the figures are aligned. The first half 110 and the second half 120 of the pot core are made of, for example, iron or ferrite.

[0039] The inductor 10 according to the present application is particularly suitable for high-voltage operating scenarios requiring high inductance, for which purpose, unlike the common busbars in the form of metal wires, for example, copper wires, the set of busbars 200 of the inductor 10 of the present application can be implemented as busbars 210, 220 in the form of two copper bars having a larger cross-sectional dimension. One of the busbars 210, 220 in the form of copper bars, for example, 210 is the positive busbar, while the other, for example, 220 is the negative busbar. The busbars 210 and 220 comprise windings 211, 221 arranged in parallel to each other interleaved within the inner space of the pot core 100 and end portions 212, 213 and 222, 223 extending from opposite ends of the respective windings 211, 221 out of the inner space of the pot core 100 to the outside of the pot core 100. In the assembled inductor 10, the windings 211 of the positive busbar 210 and the windings 221 of the negative busbar 220 axially face each other and are uniformly spaced by an axial spacing, as described in detail below.

[0040] Generally, the size of the inductance that an inductor can produce is directly proportional to the number of turns of the busbar, and therefore, compared to the common busbar formed as two flat plate-shaped busbars in parallel, the portion of the busbars 210 and 220 of the present application that is accommodated in the inner space of the pot core is formed as windings 211, 221, which increases the number of turns of the busbar, and therefore, the resulting inductor 10 can produce a greater inductance, making it more suitable for high-voltage operating scenarios requiring high inductance, for example, for use in EMC filters.

[0041] The principle of inductors generating inductance is known in the art. In brief, inductance is generated by a magnetic field established around the busbars 210, 220 when the current flowing through the busbars 210, 220 changes. When the busbars are formed as metal bars, for example copper bars, the two copper bars are usually arranged in parallel, that is to say, a uniform distance is formed between the two copper bars along the direction of their elongation. In the present application, since the portion of the set of busbars 200 accommodated in the inner space of the pot core 100 is formed as the winding portions 211, 221, in order to improve the electromagnetic induction phenomenon between the positive busbar 210 and the negative busbar 220 of the set of busbars 200, and to achieve a compact structure, it is advantageous that the winding portion 211 of the positive busbar 210 and the winding portion 221 of the negative busbar 220 axially face each other with a uniform axial spacing. In this context, "axial" is to be understood as the direction of the axis around which the winding portion 211 of the positive busbar 210 and the winding portion 221 of the negative busbar 220 are wound, in the case of the assembled inductor 10 shown in the form of a cylinder, "axial" is the direction of extension of the center line of the cylinder, that is to say, the line between the centers of the two end surfaces. The winding portion 211 of the positive busbar 210 and the winding portion 221 of the negative busbar 220 axially facing each other with a uniform axial spacing means that the axial spacing between the winding portion 211 of the positive busbar 210 and the winding portion 221 of the negative busbar 220 is constant or substantially constant at any position in the axial direction, so that a compact busbar arrangement can be achieved. Further, the winding portions 211 and 221 of the busbars 210 and 220, respectively, are arranged in parallel interleaved with each other such that the axial spacing of the winding portion 211 of the positive busbar 210 and the winding portion 221 of the negative busbar 220 as well as the radial clearance of the adjacent ends of the positive busbar 210 and the negative busbar 220 are equal and remain constant. The specific arrangement of the positive busbar 210 and the negative busbar 220 will be described in more detail below. Figure 2

[0042] Figure 2 The assembled inductor 10 is shown in a perspective view, in combination with Figure 1 and Figure 1 It can be seen that the two halves 110 and 120 of the pot core 100 are mounted in opposition to each other to make up the complete pot core 100, and it can also be seen that the ends 212, 213 of the positive busbar 210 and the ends 222, 223 of the negative busbar 220 extend from the opposite ends of the winding portions 211, 221, respectively, out of the inner space of the pot core 100 to the outside of the pot core 100, while the winding portions 211 of the positive busbar 210 and the winding portions 221 of the negative busbar 220 are completely enclosed within the inner space of the pot core 100, whereby the shielding effect of the assembled pot core 100 on the busbars 210 and 220 can be improved. Figure 2

[0043] ​​The two halves 110 and 120 of the pot core 100 can be attached to each other by a fastening means, such as a fastening glue, or a fastening structure that is separate from or integral with one or both of the two halves 110 and 120, such that the two halves 110 and 120 are fixed relative to each other during operation of the inductor 10.

[0044] Although not shown in the drawings, the inductor 10 according to the present application can also include a housing mounted around the outer periphery of the pot core 100, which is configured to house the pot core 100 therein and has perforations through which the ends 212, 213, 222, 223 of the bus bars 210 and 220 extend. Corresponding to the configuration of the pot core 100, the housing can also be made in two housing halves, each of which can house a corresponding one of the halves of the pot core 100 therein, and when the two housing halves are mounted in alignment, the pot core 100 is housed therein.

[0045] The two housing halves can be attached to each other by a fastening means, such as a fastening glue, or a fastening structure that is separate from or integral with the two housing halves.

[0046] The ends 212, 213, 222, 223 of the bus bars 210 and 220 extend through the perforations of the two housing halves to the outside of the two housing halves, so that the bus bars 210 and 220 can be connected to other elements in a circuit. Bus bar fixing means can be formed on the two housing halves to fix the bus bars 210 and 220, respectively, whereby in the assembled inductor 10, the distance between the bus bars 210 and 220 can be maintained uniform. The bus bar fixing means can be formed as an integral part of the two housing halves, or can also be separate means attached to the two housing halves.

[0047] The pot core 100 according to the present application will be described in more detail below Figure 1 and Figure 3 The pot core 100 according to the present application will be described in more detail below Figure 3 A side view of the two halves of the pot core 100 according to one embodiment of the present application is shown. The pot core 100 includes a first half 110 and a second half 120, and since the two halves can have exactly or approximately the same configuration, the first half 110 will be described in more detail below.

[0048] The first half 110 includes an end face portion 111 and a circumferential portion 112 that extends perpendicularly along the edge of the end face portion 111. Figure 1 and Figure 3The end face portion 111 of the first half 110 is shown to be formed as a circular shape, and correspondingly, the circumferential portion 112 is formed as a form of a wall of a circular ring shape extending perpendicularly to the circular end face portion 111 from a circumferential edge of the circular end face portion 111. A through opening 113 is formed in the end face portion 111 such that in the assembled inductor 10, one end portion of each of the bus bars 210 and 220, such as the end portion 212 of the positive bus bar 210 and the end portion 222 of the negative bus bar 220 as shown, extends through the opening 113 to the outside of the pot core 100. Figure 2

[0049] The first half 110 can further include a central post 114 extending from the center of the end face portion 111 in the same direction as the extension direction of the circumferential portion 112, and the bus bars 210 and 220 each include a winding portion 211 and 221 around the central post of the two halves. That is, in the perspective view shown in Figure 3 the center line of the central post 114 coincides with the center of the end face portion 111, or in other words, the central post 114 is centrally positioned in the very center of the end face portion 111, such an arrangement can make the arrangement of the winding portions 211 and 221 around the central post 114 inside the assembled pot core 100 more compact, but such a centrally positioned arrangement is not strictly required. As shown in Figure 3 the opening 113 of the end face portion 111 of the first half 110 is formed between the circumferential portion 112 and the central post 114. It should be noted that the size of the opening 113 and the central post 114 can each depend on the cross-sectional size of the bus bars 210 and 222.

[0050] Corresponding to the first half 110, the second half 120 can include an end face portion 121, a circumferential portion 122, an opening 123, and a central post 124, and the portions of the second half 120 can be exactly the same as the corresponding portions of the first half 110. However, this is not necessary, for example, the positions of the opening 113 of the first half 110 and the opening 123 of the second half 120 depend on the arrangement of the bus bars 210 and 220, and the opening 123 of the second half 120 can be different from the position of the opening 113 of the first half 110 in the respective end face portions. Nevertheless, it is advantageous to make the first half 110 and the second half 120 exactly the same in order to facilitate the manufacture and installation of the pot core 100.

[0051] When the two halves 110 and 120 are assembled as shown in Figure 2 ​When the two halves 110, 120 are mounted in opposition to each other, a complete pot core 100 is formed, in which the end face portions 111, 121 and the circumferential portions 112, 122 and the central posts 114, 124 together enclose an inner space of the pot core 100 to accommodate the winding portions 221, 222 of the set of bus bars 200 in the inner space, while the end portions 212, 213, 222, 223 of the set of bus bars 200 extend through the openings 113, 123 to the outside of the pot core 100.

[0052] Advantageously, the central posts 114, 124 of the two halves 110, 120 of the pot core 100 are made of the same magnetic material as the circumferential portions 112, 122 and form solid post structures, and, in case the first and second halves each comprise a central post, the central post 114 of the first half 110 and the central post 124 of the second half 120 are aligned in close abutment to each other when the first half 110 and the second half 120 are mounted in opposition to each other to form a complete post structure. Thus, in the assembled inductor 10, the winding portions 211, 221 of the bus bars 210, 220 are enclosed by the central posts 114, 124 and the circumferential portions 112, 122 to form a closed magnetic field, so that the size of the inductance that can be generated by the inductor 10 can be increased.

[0053] A set of bus bars 200 according to the present application will be described in more detail below with reference to Figure 1 and Figure 4 A set of bus bars 200 according to the present application will be described in more detail below with reference to Figure 4 Fig. 2 shows a plan view of the two winding portions of the two bus bars corresponding to Figs. 1a and 1b, when the winding portions are arranged in parallel in an interleaved manner. Referring to Fig. 2, Figure 1 Fig. 2 shows a plan view of the two winding portions of the two bus bars corresponding to Figs. 1a and 1b, when the winding portions are arranged in parallel in an interleaved manner. Referring to Fig. 2, Figure 4 The positive bus bar 210 comprises a winding portion 211 and end portions 212, 213 extending in opposite directions from opposite ends of the winding portion 211. Correspondingly, the negative bus bar 220 comprises a winding portion 221 and end portions 222, 223 extending in opposite directions from opposite ends of the winding portion 221. As shown in Figs. 1a and 1b, Figure 2 and Figure 4 As shown in Figs. 1a and 1b, the winding portion 211 of the positive bus bar 210 and the winding portion 221 of the negative bus bar 220 are each wound in two turns, so that the winding portions 211, 221 can be accommodated in the inner space of the pot core 100 around the central posts 114, 124. That is, the winding portions 211, 221 form two turns around the central posts 114, 124 when they are arranged in the inner space of the pot core 100.

[0054] In Figure 2 and Figure 4In the embodiment, the winding portion 211 of the positive busbar 210 and the winding portion 221 of the negative busbar 220 are respectively wound into two turns. The inductor 10 formed at this time includes two turns of busbar. Compared with a conventional inductor that provides two parallel flat busbars, the inductor 10 according to the present invention can generate an inductance that is increased by four times the original. Therefore, the inductance that can be generated by the inductor is greatly increased without increasing the volume of the inductor. Therefore, the inductor according to the present invention is more suitable for scenarios where high voltage working conditions require high inductance.

[0055] like Figure 4 As shown, the winding portion 211 of the positive busbar 210 and the winding portion 221 of the negative busbar 220 are axially aligned with each other (ie Figure 4 The busbars 200 are arranged in a horizontal direction facing each other and spaced evenly in the axial direction. Such an arrangement can make the arrangement of a group of busbars 200 in the assembled inductor more compact. Figure 4 As shown, the winding portion 211 of the positive busbar 210 and the winding portion 221 of the negative busbar 220 are completely axially facing each other without radial offset, that is, in the assembled inductor 10, the winding portion 211 of the positive busbar 210 and the winding portion 221 of the negative busbar 220 are each radially (i.e. Figure 4 The outermost portions (in the vertical direction) of the inductor 10 are roughly located in the same annular plane without offset, so that the arrangement of a group of busbars 200 in the assembled inductor 10 can be further made more compact, and the electromagnetic induction between the positive busbar 210 and the negative busbar 220 can be maximized to increase the inductance that the inductor 10 can generate as much as possible.

[0056] like Figure 4 As shown, the pitch P1 of the winding portion 211 of the positive busbar 210 can be equal to the pitch P2 of the winding portion 221 of the negative busbar 220. As is known in the art, the pitches P1 and P2 can be defined as the axial distance between two adjacent turns of the winding portion of the busbar, which measures the tightness or sparseness of the busbar winding.

[0057] Figure 4 The adjacent ends of positive busbar 210 and negative busbar 220 are shown to be arranged parallel to each other and facing each other with a predetermined radial gap d. That is, radial gap d is provided between end 212 of positive busbar 210 and end 222 of negative busbar 220, and radial gap d is also provided between end 213 of positive busbar 210 and end 223 of negative busbar 220.

[0058] Preferably, in the assembled inductor 10, the radial gap d is determined according to the required electrical clearance between the busbars 210, 220. The pitch P1 of the winding 211 of the positive busbar 210 and the pitch P2 of the winding 221 of the negative busbar 220 are then dependent on the cross-sectional thickness of the respective busbar and the radial gap d.

[0059] As mentioned before, the high-voltage inductor busbar is usually realized in the form of two copper bars. Also, depending on the actual operating conditions, a certain electrical clearance between the two copper bar busbars is required. Thus, according to the actual operating conditions, the required electrical clearance between the busbars 210, 220 can be derived and the busbars 210, 220 can be designed with a corresponding cross-sectional thickness. On this basis, the aforementioned pitches P1 and P2 and the radial gap d can be determined, whereby the assembled inductor 10 can be made as compact as possible while meeting the requirements of the actual operating conditions.

[0060] As Figure 5A As is schematically shown in Fig. 2, the radial gap d between the end portions 212, 213 of the positive busbar 210 and the corresponding adjacent end portions 222, 223 of the negative busbar 220 can be approximately equal to the cross-sectional thickness of the positive busbar 210 and the negative busbar 220, i.e. the pitches P1 and P2 are approximately four times the radial gap d. However, this is not necessarily the case, as mentioned before, the radial gap d is mainly dependent on the required electrical clearance between the busbars 210, 220.

[0061] Preferably, in the assembled inductor 10, the busbars 210, 220 maintain a uniform distance between each other at any corresponding place. In particular, the axial distance between the winding 211 of the positive busbar 210 and the winding 221 of the negative busbar 220 and the radial gap d of the adjacent end portions of the positive busbar 210 and the negative busbar 220 are equal and constant, whereby the electromagnetic induction phenomenon between the two busbars can be improved, and thus the size of the inductance that can be generated by the inductor 10 can be increased, and, such an arrangement can make the arrangement of the busbars more compact, increase the utilization of the interior space of the pot core 100, so that the inductor can be made as small as possible while meeting the size of the inductance that can be generated by the inductor.

[0062] It should be noted that the winding portions 211, 221 of the bus bars 210 and 220 in the inductor 10 of the present application are not limited to being wound in two turns as shown in the figures, but can also be wound in three or more turns, the number of turns in which the winding portions 211, 221 of the bus bars 210 and 220 can be wound depending on the size of the pot core 100, specifically, the size of the two halves 110 and 120 of the pot core 100 in the direction perpendicular to the end face portions 111, 121, or the extension of the circumferential portions 112, 122, the larger the size, the more turns in which the winding portions 211, 221 of the bus bars 210 and 220 can be wound, thereby the larger the number of turns of the resulting set of bus bars 200, and the larger the inductance that the inductor 10 can generate. Therefore, the size of the two halves 110 and 120 of the pot core 100 and the number of turns in which the winding portions 211 and 221 of the bus bars 210 and 220 are wound are determined by the requirement of the size of the inductance that the inductor generates.

[0063] It should also be noted that although the two halves 110 and 120 of the pot core 100 are shown in the figures to be formed in a cylindrical shape, and the central columns 114, 124 are formed in a cylindrical shape and the winding portions 211, 221 are wound in a circular shape, these portions do not have to be formed in the shapes shown in the figures, and it is within the scope of the present application that these portions are formed in a form having a square or other shape cross section. Nevertheless, having these portions in the shapes shown in the figures can result in the inductor 10 having a very compact structure, thereby increasing the size of the inductance that the inductor 10 can generate as much as possible while maintaining a small volume of the inductor 10.

[0064] Generally, in an inductor, there is an insulation requirement between the bus bars in a set and between the set of bus bars and the core. For this purpose, the surface of the set of bus bars 200 of the present application can include an insulation layer. For example, the set of bus bars 200 can be pre-processed for surface insulation, such as vulcanization, before being installed into the interior space of the pot core 100.

[0065] Alternatively or additionally, in the case where the insulation requirement between the set of bus bars and between the set of bus bars and the magnetic core is so high that the ordinary insulation layer is difficult to meet the insulation requirement, the inductor 10 according to the present application can further comprise an insulation structure (not shown in the figures) configured to fill the space between the set of bus bars 200 and the pot-type magnetic core 100. In this case, the bus bars 210, 220 and the pot-type magnetic core 100 are sized such that a space for placing the insulation structure is left between the bus bars 210, 220 and the pot-type magnetic core 100. For example, the insulation structure can be formed as a ring-like structure surrounding the winding portions 211, 221 of the bus bars 210, 220, the inner wall of the insulation structure can be in close contact with the winding portions 211, 221 of the bus bars 210, 220, and the outer wall can be in close contact with the two halves 110, 120 of the pot-type magnetic core 100, thereby enhancing the insulation effect between the set of bus bars 200 and the pot-type magnetic core 100.

[0066] The thickness of the insulation structure can depend on the insulation requirement, and the insulation structure is preferably made of high-temperature and high-voltage resistant material to adapt to the working environment of the inductor. Also, the insulation layer on the surface of the set of bus bars 200 can exist simultaneously with the insulation structure filling the space between the set of bus bars 200 and the pot-type magnetic core 100 to further increase the insulation effect.

[0067] Figure 5B 、 Figure 5C and Figure 2 respectively show the perspective view, the left side view and the right side view of the inductor 10 corresponding to Figures 5A to 5C the case where one half of the pot-type magnetic core is omitted. It can be clearly seen from Figures 5A to 5B how the bus bars 210, 220 arranged in a staggered parallel manner are accommodated within the internal space of the pot-type magnetic core 100.

[0068] Figure 5A only the second half 120 of the pot-type magnetic core 100 is shown, and the first half 110 is omitted. It can be seen from Figure 5B and Figure 5C that the winding portions 211, 221 of the bus bars 210, 220 sufficiently fill the internal space of the pot-type magnetic core 100, that is, the internal space of the pot-type magnetic core 100 is maximally arranged with the bus bars of multiple turns to maximize the inductance size that the inductor 10 can generate. It can be seen from ​ that the opening 123 of the second half 120 of the pot-type magnetic core 100 is only slightly larger than the cross-sectional dimension occupied by the end portions 213, 223 of the bus bars 210, 220, thereby improving the shielding effect of the assembled pot-type magnetic core 100 on the bus bars 210 and 220.

[0069] In summary, the inductor of the present application increases the number of turns of the bus to increase the size of the inductance that can be generated without increasing the volume of the inductor, and is particularly suitable for high-voltage working conditions requiring high inductance, such as an inductor used as an EMC filter, but its application scenarios are not limited thereto.

[0070] The above describes in detail the feasible but non-limiting embodiments of the inductor according to the present application with the help of the drawings. It is obvious that modifications and supplements to the technology and structure and recombination of features in various embodiments should be considered within the scope of the present application without departing from the scope and essence of the present disclosure set forth in the following claims. Therefore, these modifications and supplements that can be conceived under the teaching of the present application should be considered as part of the present disclosure. The scope of the present disclosure is limited by the following appended claims, and includes equivalent technologies known at the filing date of the present disclosure and equivalent technologies not yet foreseen.

Claims

1. An inductor (10), comprising a pot-type magnetic core (100) and a set of busbars (200), wherein: The pot-type magnetic core (100) includes a first half (110) and a second half (120), at least one of the first half (110) and the second half (120) includes a central column (114, 124), and the first half (110) and the second half (120) are aligned and mounted relative to each other to form an annular inner space around the central column (114, 124); The set of busbars (200) includes a positive busbar (210) and a negative busbar (220), wherein the positive busbar (210) and the negative busbar (220) include winding portions (211, 221) arranged in parallel with each other in an inner space of the pot-type magnetic core (100) and end portions (212, 213, 222, 223) extending from opposite ends of the winding portions (211, 221) out of the inner space of the pot-type magnetic core (100) to the outside of the pot-type magnetic core (100), wherein the winding portion (211) of the positive busbar (210) and the winding portion (221) of the negative busbar (220) axially face each other and are spaced apart by a uniform axial distance.

2. The inductor (10) according to claim 1, wherein the first half (110) and the second half (120) each include an end face portion (111, 121) and a circumferential portion (112, 122) extending perpendicularly from an edge of the corresponding end face portion (111, 121), the end face portions (111, 121) each having an opening (113, 123) therethrough, and the central column (114, 124) extending from the center of the end face portion (111, 121) in the same extending direction as the circumferential portion (112, 122), in, When the first half (110) and the second half (120) are aligned and installed relative to each other, the end surface portions (111, 121), the circumferential portions (112, 122) and the central column (114, 124) jointly enclose an interior space of the pot-type magnetic core (100), and the ends (212, 213, 222, 223) of the set of busbars (200) extend through the openings (113, 123) to the outside of the pot-type magnetic core (100).

3. The inductor (10) of claim 2, wherein the central pillar (114, 124) is made of the same magnetic material as the circumferential portion (112, 122) and forms a solid pillar structure, and, when the first half (110) and the second half (120) each include a central pillar (114, 124), the central pillars (114, 124) are closely aligned with each other when the first half (110) and the second half (120) are aligned and mounted relative to each other.

4. The inductor (10) according to claim 1, wherein the winding portion (211) of the positive busbar (210) and the winding portion (221) of the negative busbar (220) completely face each other axially without radial offset.

5. The inductor (10) according to any one of claims 1 to 4, wherein adjacent ends of the positive busbar (210) and the negative busbar (220) are arranged parallel to each other and face each other with a set radial gap (d).

6. The inductor (10) according to claim 5, wherein the winding portions (211, 221) are arranged in parallel with each other in an alternating manner so that the axial spacing between the winding portion (211) of the positive busbar (210) and the winding portion (221) of the negative busbar (220) and the radial gap (d) between the adjacent ends of the positive busbar (210) and the negative busbar (220) are equal and remain constant.

7. The inductor (10) according to claim 6, wherein a pitch (P1) of the winding portion (211) of the positive busbar (210) is equal to a pitch (P2) of the winding portion (221) of the negative busbar (220).

8. The inductor (10) according to claim 5, wherein The radial gap (d) is determined according to the required electrical clearance between the positive busbar (210) and the negative busbar (220).

9. The inductor (10) according to any one of claims 1 to 4, wherein the sizes of the first half (110) and the second half (120) and the number of turns of the winding portion (211, 221) are determined by the requirement of the inductance generated by the inductor (10).

10. The inductor (10) according to any one of claims 1 to 4, wherein a surface of the set of busbars (200) comprises an insulating layer, and / or The inductor (10) includes an insulating structure, wherein the insulating structure is configured to fill a space between the set of busbars (200) and the pot core (100).

Images