A connection inductor component for LCL filtering

Abstract

The present invention provides a connecting inductor component for LCL filtering, which allows gaps to be left between turns to ensure heat dissipation performance, and integrates the filter inductor and the connecting inductor into one, and the wiring is connected by a soft wire, so that the installation is convenient and flexible, and the structure is simple and easy to manufacture. Two groups of spaced magnetic ring groups are arranged on the bottom plate, specifically a filter inductor magnetic ring group and a connecting inductor magnetic ring group, each group of magnetic ring groups includes at least one magnetic ring, the bottom of each group of magnetic ring groups is fixed at a corresponding position on the upper surface of the bottom plate, and the outer ring of the non-bottom area of ​​each group of the magnetic ring groups is surrounded by a plurality of flat wire turns spaced apart, each of the flat wire turns is wound by flat metal, and the outer surface of each flat wire turn is wrapped with an insulating film or dipped in insulating paint, and the flat wire turn is specifically obtained by a thin flat metal surrounding the radial ring of the corresponding magnetic ring group for at least one circle, and a circumferential spacing distance is left between adjacent flat wire turns.

Description

Technical Field

[0001] The invention relates to the technical field of filtering equipment, in particular to a connection inductor component for LCL filtering. Background Art

[0002] LCL filtering is mainly used for active power filters (APF) and static VAR generators (SVG). The connection inductor components of LCL filtering in the prior art are in the form of multi-strand windings, with multiple small inductors welded in parallel on a PCB board, and the inductors are connected to the front and rear stage circuits with copper bars or copper columns. The existing multi-strand winding inductors are not conducive to heat dissipation and will affect the internal air duct of the APF or SVG. In addition, the multi-strand windings are manually wound, so the windings are often loose, which may cause vibration noise when a large current flows through. Summary of the invention

[0003] In view of the above problems, the present invention provides a connecting inductor component for LCL filtering, which leaves gaps between turns to ensure heat dissipation performance, and integrates the filter inductor and the connecting inductor into one, and the wiring is connected by soft wires, making the installation convenient and flexible, and the structure is simple and easy to manufacture.

[0004] A connecting inductor component for LCL filtering, characterized in that: it includes a bottom plate, on which are arranged two groups of spaced magnetic ring groups, specifically a filter inductor magnetic ring group and a connecting inductor magnetic ring group, each group of magnetic ring groups includes at least one magnetic ring, the bottom of each group of magnetic ring groups is fixedly arranged at a corresponding position on the upper surface of the bottom plate, and the outer ring circumference of the non-bottom area of ​​each group of magnetic ring groups is covered with a plurality of turns of flat wire turns spaced apart, each of the flat wire turns is wound by flat metal, and the outer surface of each flat wire turn is wrapped with an insulating film or dipped in insulating paint, and the flat wire turns are specifically obtained by wrapping a thin flat metal around the radial ring of the corresponding magnetic ring group for at least one turn, and a circumferential spacing distance is left between adjacent flat wire turns, and a plurality of flat wire turns on each group of magnetic ring groups are provided. The dry flat wire turns include corresponding end flat wire turns, one of the end flat wire turns on the filter inductor magnetic ring group is externally connected to a filter inductor lead-out wire, and the filter inductor lead-out wire is connected to a filter inductor lead-out terminal, one of the end flat wire turns on the connecting inductor magnetic ring group is externally connected to a connecting inductor lead-out wire, and the connecting inductor lead-out wire is connected to a connecting inductor lead-out terminal, and the filter inductor lead-out terminal and the connecting inductor lead-out terminal are respectively fixed at corresponding positions on the upper surface of the base plate, and it also includes a connecting terminal, which is fixed at a corresponding position on the upper surface of the base plate, and the connecting terminal is respectively connected to another end flat wire turn on the filter inductor magnetic ring group and another end flat wire turn on the connecting inductor magnetic ring.

[0005] It is further characterized by:

[0006] The outer periphery of the bottom plate is provided with a plurality of positioning holes, and the positioning holes make the whole structure easy to install;

[0007] The filter inductor magnetic ring group and the connecting inductor magnetic ring group are arranged side by side, and the central axes are arranged on the same vertical plane, ensuring that the occupied space is small and the arrangement is convenient;

[0008] The bottom of each magnetic ring group is fixedly adhered to the corresponding upper surface of the bottom plate by black glue to ensure that the position of the magnetic ring group is stable and reliable;

[0009] When the magnetic ring group includes at least two magnetic rings, the magnetic rings in each magnetic ring group are equal-diameter magnetic rings, all the equal-diameter magnetic rings are arranged in parallel, the central axes are on the same straight line, and the facing end faces of adjacent magnetic rings are arranged closely, which is used to adjust the inductance according to demand;

[0010] After a number of flat wire turns are arranged at corresponding circumferential intervals of each magnetic ring group, a fixing tie is wrapped around the width center position formed by the flat wire turns, and the bottom plate is provided with a through hole corresponding to the passing position of the fixing tie. The fixing tie is fixedly installed along the equivalent annular surface of the flat wire turn and the through hole and the corresponding surface area of ​​the lower surface of the bottom plate to ensure that the position of the flat wire turn is stable and reliable;

[0011] The connection terminal is located between the inductor lead-out terminal and the connecting inductor lead-out terminal. The connection terminal, the inductor lead-out terminal and the connecting inductor lead-out terminal are arranged on the same side of the bottom plate. The connection terminal is arranged on one side of the interval area between the two magnetic ring groups, which ensures that subsequent wiring is convenient and quick.

[0012] The connection terminals, inductor lead terminals, and connection inductor lead terminals are all cold-pressed terminals, which allow subsequent connections to be made through flexible wires, making installation and wiring more flexible;

[0013] The base plate is specifically a FR4 thickened base plate, which has insulation, high temperature resistance and firmness characteristics;

[0014] The flat wire turns are specifically formed by winding copper metal or aluminum metal.

[0015] After adopting the structure of the present invention, since the outer ring circumference of the non-bottom area of ​​each group of magnetic ring groups is equipped with a plurality of flat wire turns arranged at intervals, each flat wire turn is wound by flat metal, and the outer surface of each flat wire turn is wrapped with an insulating film or dipped in insulating paint. The flat wire turns are specifically obtained by wrapping a thin flat metal around the radial ring of the corresponding magnetic ring group for at least one circle, and an annular spacing distance is left between adjacent flat wire turns, so that the turns are obtained by vertically winding the flat wire, so that gaps are left between the turns to ensure heat dissipation performance, and the filter inductor magnetic ring group and the connecting inductor magnetic ring group are fixedly installed on the same base plate, and connecting terminals, inductor lead-out terminals, and connecting inductor lead-out terminals are respectively arranged on the base plate, wherein the connecting terminals are used to connect the filter capacitor, the inductor lead-out terminals are used to lead out the filter inductor, and the connecting inductor lead-out terminals are used to lead out the connecting inductor, so that the filter inductor and the connecting inductor are integrated into one, and the wiring is connected by a soft wire, so that the installation is convenient and flexible, and the structure is simple and easy to manufacture. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the top view structure of the present invention;

[0018] Figure 3 It is a bottom view structural schematic diagram of the present invention;

[0019] Figure 4 It is a schematic diagram of the assembly structure when the magnetic ring group has three magnetic rings;

[0020] The names corresponding to the serial numbers in the figure are as follows:

[0021] Bottom plate 1, filter inductor magnetic ring group 2, connecting inductor magnetic ring group 3, magnetic ring 4, flat wire turns 5, annular spacing distance 6, filter inductor lead wire 7, filter inductor lead terminal 8, connecting inductor lead wire 9, connecting inductor lead terminal 10, connecting terminal 11, positioning hole 12, fixing tie 13, through hole 14. DETAILED DESCRIPTION

[0022] A connection inductor component for LCL filtering, see Figure 1-Figure 4:It includes a bottom plate 1, on which are arranged two groups of spaced magnetic ring groups, specifically a filter inductor magnetic ring group 2 and a connecting inductor magnetic ring group 3, each group of magnetic ring groups includes at least one magnetic ring 4, the bottom of each group of magnetic ring groups is fixedly arranged at a corresponding position on the upper surface of the bottom plate 1, and the outer ring circumference of the non-bottom area of ​​each group of magnetic ring groups is set with a plurality of turns of flat wire turns 5 arranged at intervals, each flat wire turn 5 is wound by flat metal, and the outer surface of each flat wire turn 5 is wrapped with an insulating film or dipped in insulating paint, and the flat wire turn 5 is specifically obtained by wrapping a thin flat metal around the radial ring of the corresponding magnetic ring group for at least one circle, and a circumferential spacing distance 6 is left between adjacent flat wire turns 5, and the plurality of flat wire turns 5 on each group of magnetic ring groups include corresponding The end flat wire turns, one of the end flat wire turns on the filter inductor magnetic ring group 2 is externally connected to the filter inductor lead-out wire 7, the filter inductor lead-out wire 7 is connected to the filter inductor lead-out terminal 8, one of the end flat wire turns on the connecting inductor magnetic ring group 3 is externally connected to the connecting inductor lead-out wire 9, the connecting inductor lead-out wire 9 is connected to the connecting inductor lead-out terminal 10, the filter inductor lead-out terminal 8 and the connecting inductor lead-out terminal 10 are respectively fixed at corresponding positions on the upper surface of the base plate 1, and it also includes a connecting terminal 11, the connecting terminal 11 is fixed at corresponding positions on the upper surface of the base plate 1, and the connecting terminal 11 is respectively connected to the other end flat wire turn on the filter inductor magnetic ring group 2 and the other end flat wire turn on the connecting inductor magnetic ring 3.

[0023] A plurality of positioning holes 12 are provided on the periphery of the bottom plate 1, and the positioning holes 12 make the whole structure easy to install;

[0024] The filter inductor magnetic ring group 2 and the connecting inductor magnetic ring group 3 are arranged side by side, and the central axes are arranged on the same vertical plane, ensuring that the occupied space is small and the arrangement is convenient;

[0025] The bottom of each magnetic ring group is fixed to the corresponding upper surface of the bottom plate 1 by black glue to ensure that the position of the magnetic ring group is stable and reliable;

[0026] When the magnetic ring group includes at least two magnetic rings 4, the magnetic rings in each magnetic ring group are equal-diameter magnetic rings, all the equal-diameter magnetic rings 4 are arranged in parallel, the central axes are on the same straight line, and the facing end faces of adjacent magnetic rings 4 are arranged closely, which is used to adjust the inductance according to the needs;

[0027] After a number of flat wire turns 5 are arranged at corresponding circumferential intervals of each magnetic ring group, a fixing tie 13 is wrapped around the width center position formed by the flat wire turns 5, and a through hole 14 is arranged on the bottom plate 1 corresponding to the passing position of the fixing tie 13. The fixing tie 13 is fixedly installed along the equivalent annular surface of the flat wire turn 5 and the through hole 14 and the corresponding surface area of ​​the lower surface of the bottom plate to ensure that the position of the flat wire turn 5 is stable and reliable;

[0028] The connection terminal 11 is located between the inductor lead-out terminal 8 and the inductor lead-out terminal 10. The connection terminal 11, the inductor lead-out terminal 8 and the inductor lead-out terminal 11 are arranged on the same side of the bottom plate 1. The connection terminal 11 is arranged on one side of the interval area between the two magnetic ring groups, which ensures that subsequent wiring is convenient and quick.

[0029] The connection terminal 11, the inductor lead terminal 8, and the connection inductor lead terminal 10 are all cold-pressed terminals, which allow subsequent connections to be made through soft wires, making installation and wiring more flexible;

[0030] The base plate 1 is specifically a FR4 thickened base plate, which has insulation, high temperature resistance and firmness characteristics;

[0031] The flat wire turns 5 are specifically formed by winding copper metal or aluminum metal.

[0032] The working principle is as follows: since the outer ring of the non-bottom area of ​​each group of magnetic ring groups is surrounded by a plurality of flat wire turns arranged at intervals, each flat wire turn is wound by flat metal, and the outer surface of each flat wire turn is wrapped with an insulating film or dipped in insulating paint, the flat wire turn is specifically obtained by wrapping a thin flat metal around the radial ring of the corresponding magnetic ring group for at least one circle, and a circumferential spacing distance is left between adjacent flat wire turns, so that the turns are obtained by vertically winding the flat wire, leaving gaps between the turns to ensure heat dissipation performance, and the filter inductor magnetic ring group and the connecting inductor magnetic ring group are fixedly installed on the same base plate, and connecting terminals, inductor lead-out terminals, and connecting inductor lead-out terminals are respectively arranged on the base plate, wherein the connecting terminals are used to connect the filter capacitor, the inductor lead-out terminals are used to lead out the filter inductor, and the connecting inductor lead-out terminals are used to lead out the connecting inductor, so that the filter inductor and the connecting inductor are integrated into one, and the wiring is connected by a soft wire, so that the installation is convenient and flexible, and the structure is simple and easy to manufacture.

[0033] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0034] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A connection inductor component for LCL filtering, characterized in that: It includes a bottom plate, on which two groups of spaced magnetic ring groups are arranged, specifically a filter inductor magnetic ring group and a connecting inductor magnetic ring group, each group of magnetic ring groups includes at least one magnetic ring, the bottom of each group of magnetic ring groups is fixedly arranged at a corresponding position on the upper surface of the bottom plate, and the outer ring circumference of the non-bottom area of ​​each group of magnetic ring groups is covered with a plurality of turns of flat wire turns spaced apart, each of the flat wire turns is wound by flat metal, and the outer surface of each flat wire turn is wrapped with an insulating film or dipped in insulating paint, and the flat wire turns are specifically obtained by wrapping a thin flat metal around the radial ring of the corresponding magnetic ring group for at least one circle, and a circumferential spacing distance is left between adjacent flat wire turns, and the plurality of flat wire turns on each group of magnetic ring groups include corresponding end The filter inductor magnetic ring group has one flat wire turn at one end, one of the flat wire turns at one end is externally connected to a filter inductor lead-out wire, the filter inductor lead-out wire is connected to a filter inductor lead-out terminal, one of the flat wire turns at one end on the connecting inductor magnetic ring group is externally connected to a connecting inductor lead-out wire, the connecting inductor lead-out wire is connected to a connecting inductor lead-out terminal, the filter inductor lead-out terminal and the connecting inductor lead-out terminal are respectively fixed at corresponding positions on the upper surface of the bottom plate, and it also includes a connecting terminal, the connecting terminal is fixed at corresponding positions on the upper surface of the bottom plate, and the connecting terminal is respectively connected to the other flat wire turn at one end on the filter inductor magnetic ring group and the other flat wire turn at one end on the connecting inductor magnetic ring; The connecting terminal is located between the inductor lead-out terminal and the connecting inductor lead-out terminal. The connecting terminal, the inductor lead-out terminal and the connecting inductor lead-out terminal are arranged on the same side of the bottom plate. The connecting terminal is arranged on one side corresponding to the spacing area between the two magnetic ring groups. The connecting terminal, the inductor lead-out terminal, and the connecting inductor lead-out terminal are all cold-pressed terminals.

2. A connection inductor assembly for LCL filtering as claimed in claim 1, characterized in that: A plurality of positioning holes are arranged on the outer periphery of the bottom plate.

3. A connecting inductor assembly for LCL filtering as claimed in claim 1, characterized in that: The filtering inductor magnetic ring group and the connecting inductor magnetic ring group are arranged side by side, and their central axes are arranged in the same vertical plane.

4. A connecting inductor assembly for LCL filtering as claimed in claim 1, characterized in that: The bottom of each magnetic ring group is fixedly adhered to the corresponding upper surface of the bottom plate by black glue.

5. A connecting inductor assembly for LCL filtering as claimed in claim 1, characterized in that: When the magnetic ring group includes at least two magnetic rings, the magnetic rings in each magnetic ring group are equal-diameter magnetic rings, all the equal-diameter magnetic rings are arranged in parallel, their central axes are on the same straight line, and the facing end faces of adjacent magnetic rings are arranged in close contact.

6. A connection inductor assembly for LCL filtering as claimed in claim 1, characterized in that: After a number of flat wire turns are arranged at corresponding circumferential intervals of each magnetic ring group, a fixing tie is wrapped around the width center position formed by the flat wire turns, and the base plate is provided with a through hole corresponding to the passing position of the fixing tie. The fixing tie is fixed along the equivalent annular surface of the flat wire turns and the through hole and the corresponding surface area of ​​the lower surface of the base plate.

7. A connecting inductor assembly for LCL filtering as claimed in claim 1, characterized in that: The base plate is specifically a FR4 thickened base plate.

8. A connecting inductor assembly for LCL filtering as claimed in claim 1, characterized in that: The flat wire turns are specifically formed by winding copper metal or aluminum metal.

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