A winding structure filter

Abstract

The utility model relates to a winding structure filter, including a winding copper busbar assembly, a grounding capacitor assembly, a filter bracket assembly and a magnetic ring. The winding copper busbar assembly and the grounding capacitor assembly are installed on the filter bracket assembly. One end of the grounding capacitor assembly is connected to the winding copper busbar assembly, and the other end is connected to the filter bracket assembly. The magnetic ring passes through the winding copper busbar assembly; the winding copper busbar assembly is a flat copper wire laminated arrangement structure. Compared with the prior art, the utility model has the advantages of adopting a winding copper busbar assembly with a flat copper wire laminated arrangement structure to increase the inductance and improve the filtering performance of the filter, and improve the ability of the filter to suppress differential mode noise; the winding copper busbar assembly passes through the same magnetic ring, which strengthens the ability of the filter to suppress differential mode noise; the structure of the first grounding capacitor back to the second grounding capacitor makes the filter structure compact, shortens the equivalent series inductance of the capacitor absorption loop, and thus improves the high-frequency noise suppression performance of the filter.

Description

Technical Field

[0001] The utility model relates to a filter, in particular to a filter with a winding structure. Background Art

[0002] The filter is a filter circuit composed of capacitors, inductors and resistors. The filter plays a key role in motor drive. It can filter out interference and noise in the input signal and then supply the power to the motor, thus ensuring the normal operation of the motor. Figure 1 and Figure 2 As shown, the common problems of conventional filter structures are: 1) The filter structure is customized according to the outer envelope of the motor controller. Most motor controllers are compact and the filter design space is limited. In addition, the insertion loss of conventional filters used for high-voltage ports is large, resulting in low filter performance; 2) The copper bars of conventional filters are laid flat and pass through the magnetic ring in parallel. The parasitic capacitance between the copper bars is large, resulting in large high-frequency noise of the filter.

[0003] After searching, the authorization announcement number CN105405609B discloses a filter inductor, which specifically discloses: it includes two spliced ​​E-shaped magnetic cores with a bottom plate, a winding post and two side posts, a first copper sheet winding and a second copper sheet winding and an insulating sheet arranged around the winding post and having a plurality of stacked copper sheets; the first copper sheet winding and the second copper sheet winding are stacked; the first copper sheet winding and the second copper sheet winding are both formed into a vortex structure according to the shape of the winding post; the first copper sheet winding has a first external end and a first internal end arranged adjacent to the winding post, and the second copper sheet winding has a second external end and a second internal end arranged adjacent to the winding post and electrically connected to the first internal end.

[0004] However, the prior art only designs the filter inductor, and does not include other filter components. Therefore, designing a filter with good filtering performance and good noise suppression capability is a technical problem that needs to be solved. Utility Model Content

[0005] The purpose of the utility model is to provide a winding structure filter in order to overcome the defects of the prior art, that is, poor filtering performance and large high-frequency noise.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] According to one aspect of the utility model, a winding copper busbar structure filter is provided, comprising a winding copper busbar assembly, a grounding capacitor assembly, a filter bracket assembly and a magnetic ring, wherein the winding copper busbar assembly and the grounding capacitor assembly are mounted on the filter bracket assembly, one end of the grounding capacitor assembly is connected to the winding copper busbar assembly, and the other end is connected to the filter bracket assembly, and the magnetic ring passes through the winding copper busbar assembly; the winding copper busbar assembly is a flat copper wire laminated arrangement structure.

[0008] As a preferred technical solution, the magnetic ring includes a flat magnetic ring and a U-shaped magnetic ring. The flat magnetic ring is installed between the winding copper busbar assembly and the filter bracket assembly. The U-shaped magnetic ring passes through the winding copper busbar assembly and one end is fitted with the flat magnetic ring.

[0009] As a preferred technical solution, the winding copper busbar assembly includes a connection copper busbar and a winding copper busbar, the magnetic ring is installed on the winding copper busbar, and the winding copper busbar is connected to the connection copper busbar.

[0010] As a preferred technical solution, the wiring copper bar includes a first winding copper bar and a second winding copper bar, and the first winding copper bar is stacked on the second winding copper bar; the wiring copper bar includes a first wiring copper bar, a second wiring copper bar, a third wiring copper bar and a fourth wiring copper bar, one end of the first winding copper bar is connected to the first wiring copper bar, and the other end is connected to the second wiring copper bar, one end of the second winding copper bar is connected to the third wiring copper bar, and the other end is connected to the fourth wiring copper bar.

[0011] As a preferred technical solution, the winding copper busbar and the wiring copper busbar are connected by screws.

[0012] As a preferred technical solution, the grounding capacitor assembly includes a first grounding capacitor and a second grounding capacitor, and the second grounding capacitor is rotated 90° relative to the first grounding capacitor and placed on a side away from the filter bracket assembly.

[0013] As a preferred technical solution, the filter bracket assembly includes a filter bracket and a grounding copper busbar, and one end of the grounding capacitor assembly is connected to the grounding copper busbar.

[0014] As a preferred technical solution, a capacitor mounting groove is provided on the filter bracket assembly, and the grounding capacitor assembly is fixed in the capacitor mounting groove by glue dispensing.

[0015] As a preferred technical solution, the filter bracket assembly is provided with a limiting groove, and the winding copper busbar assembly is installed on the filter bracket assembly through the guiding of the limiting groove.

[0016] As a preferred technical solution, the filter also includes a rubber pad and a magnetic ring pressure plate. The rubber pad is installed at one end of the magnetic ring away from the filter bracket assembly, and the magnetic ring pressure plate is installed on the rubber pad and buckled with the filter bracket assembly.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1) The utility model adopts a winding copper busbar structure of flat copper wire, which can increase the inductance and improve the filtering performance of the filter; the stacked arrangement structure makes the overall structure compact, reduces the inter-turn parasitic capacitance, and improves the ability of the filter to suppress differential mode noise;

[0019] 2) The utility model winding copper bar assembly passes through the same magnetic ring, which can enhance the ability of the filter to suppress differential mode noise;

[0020] 3) The structure of the first grounding capacitor and the second grounding capacitor of the grounding capacitor assembly of the utility model makes the filter structure compact, shortens the equivalent series inductance of the capacitor absorption loop, and thus improves the high-frequency noise suppression performance of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the existing filter structure;

[0022] Figure 2 This is a schematic diagram of the copper busbar layout of the existing filter;

[0023] Figure 3 This is a cross-sectional view of a winding structure filter of the utility model;

[0024] Figure 4 This is a top view of a winding structure filter of the utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the filter bracket assembly of the utility model;

[0026] Figure 6 This is the front view of the grounding capacitor assembly of the utility model;

[0027] Figure 7 This is a top view of the grounding capacitor assembly of the utility model;

[0028] Figure 8 This is the front view of the winding copper busbar assembly of the utility model;

[0029] Fig. 9 This is a top view of the winding copper busbar assembly of the utility model;

[0030] The numbers in the figure show:

[0031] 1. Filter bracket assembly, 1-1. Filter bracket, 1-2. Grounding copper busbar, 2. Grounding capacitor assembly, 2-1. Second grounding capacitor, 2-2. First grounding capacitor, 3. Winding copper busbar assembly, 3-1. First wiring copper busbar, 3-2. First winding copper busbar, 3-3. Second wiring copper busbar, 3-4. Fourth wiring copper busbar, 3-5. Second winding copper busbar, 3-6. Third wiring copper busbar, 4. Magnetic ring pressure plate, 5. Rubber pad, 6. U-shaped magnetic ring, 7. Flat magnetic ring. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0033] Methods for improving filter performance include: increasing the total capacitance of the first grounding capacitor, increasing the inductance, expanding the order of the filter components, optimizing the filter parasitic parameters, etc. Since the vehicle limits the outer envelope size of the motor controller and the capacitance of the grounding capacitor, the utility model designs the filter by expanding the order of the filter components as much as possible and optimizing the filter parasitic parameters.

[0034] In order to improve the high-frequency noise suppression performance of the filter and increase the inductance of the filter, thereby improving the filter performance, the utility model proposes a winding structure filter.

[0035] like Figure 3 and Figure 4 As shown, a winding structure filter mainly includes a filter bracket assembly 1, a grounding capacitor assembly 2, a winding copper busbar assembly 3, a magnetic ring pressing plate 4, a rubber pad 5, a U-shaped magnetic ring 6 and a flat magnetic ring 7. A capacitor mounting groove is provided on the filter bracket assembly 1, and the grounding capacitor assembly 2 is placed in the capacitor mounting groove of the filter bracket assembly 1 and fixed on the filter bracket assembly 1 by dispensing glue. One end of the capacitor pin on the grounding capacitor assembly 2 is connected to the copper bar pin of the winding copper bar assembly 3, and the other end pin is connected to the grounding copper bar 1-2 of the filter bracket assembly 1; a limiting groove is provided on the filter bracket assembly, and the winding copper bar assembly 3 is installed on the filter bracket assembly 1 through the guiding effect of the limiting groove of the filter bracket assembly 1, and the winding copper bar assembly 3 is a flat copper wire laminated arrangement structure; the flat magnetic ring 7 is installed below the winding copper bar assembly 3, and the U-shaped magnetic ring 6 passes through the winding copper bar assembly 3 from above the filter bracket assembly 1 and is completely and tightly fitted with the flat magnetic ring 7; the rubber pad 5 is installed above the U-shaped magnetic ring 6, and the magnetic ring pressure plate 4 is installed on the rubber pad 5, and the U-shaped magnetic ring 6 and the flat magnetic ring are further tightly fitted by buckling with the filter bracket assembly 1.

[0036] like Figure 5 As shown, the filter bracket assembly 1 includes a filter bracket 1-1 and a grounding copper bar 1-2. The grounding copper bar 1-2 is directionally installed on the filter bracket 1-1 through a limiting groove of the filter bracket 1-1.

[0037] like Figure 6 and Figure 7As shown, the grounding capacitor assembly 2 includes a second grounding capacitor 2-1 and a first grounding capacitor 2-2. The second grounding capacitor 2-1 is rotated 90° and placed upside down on the first grounding capacitor 2-2. The second grounding capacitor 2-1 is smaller and the first grounding capacitor 2-2 is larger, that is, a large-on-back-small installation structure. This placement structure reduces the installation space of the grounding capacitor, makes the filter structure more compact, shortens the equivalent series inductance of the capacitor absorption loop, and thereby improves the high-frequency noise suppression performance of the filter.

[0038] like Figure 8 and Fig. 9 As shown, the winding copper bar assembly 3 includes a first wiring copper bar 3-1, a first winding copper bar 3-2, a second wiring copper bar 3-3, a fourth wiring copper bar 3-4, a second winding copper bar 3-5 and a third wiring copper bar 3-6. The first wiring copper bar 3-1 and the third wiring copper bar 3-6 are located in the same plane, and the second wiring copper bar 3-3 and the fourth wiring copper bar 3-4 are located in the same plane. The first winding copper bar 3-2 is stacked on the second winding copper bar 3-5, which has the advantages of compact structure, reduced parasitic capacitance between turns, and improved ability of the filter to suppress differential mode noise. The first winding copper bar 3-2 and the second winding copper bar 3-5 pass through the same magnetic ring, which has the ability to enhance the ability of the filter to suppress differential mode noise. The first wiring copper bus 3-1 is connected to the end of the first winding copper bus 3-2 by screws, the second wiring copper bus 3-3 is connected to the front end of the first winding copper bus 3-2 by screws, the third wiring copper bus 3-6 is connected to the end of the second winding copper bus 3-5 by screws, and the fourth wiring copper bus 3-4 is connected to the front end of the second winding copper bus 3-5 by screws. This connection method is convenient for the installation and disassembly of the winding copper bus.

[0039] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A winding structure filter, characterized in that: The invention comprises a wire-wound copper busbar assembly (3), a grounding capacitor assembly (2), a filter support assembly (1) and a magnetic ring. The wire-wound copper busbar assembly (3) and the grounding capacitor assembly (2) are mounted on the filter support assembly (1). One end of the grounding capacitor assembly (2) is connected to the wire-wound copper busbar assembly (3) and the other end is connected to the filter support assembly. The magnetic ring passes through the wire-wound copper busbar assembly (3). The wire-wound copper busbar assembly (3) is a flat copper wire laminated arrangement structure.

2. A wound wire structure filter according to claim 1, characterized in that: The magnetic ring comprises a flat magnetic ring (7) and a U-shaped magnetic ring (6); the flat magnetic ring (7) is installed between the winding copper busbar assembly (3) and the filter bracket assembly (1); the U-shaped magnetic ring (6) passes through the winding copper busbar assembly (3) and one end of the U-shaped magnetic ring (6) is in contact with the flat magnetic ring (7).

3. A wound wire structure filter according to claim 1, characterized in that: The winding copper busbar assembly (3) comprises a connection copper busbar and a winding copper busbar, the magnetic ring is mounted on the winding copper busbar, and the winding copper busbar is connected to the connection copper busbar.

4. A wound wire structure filter according to claim 3, characterized in that: The wiring copper bar comprises a first winding copper bar (3-2) and a second winding copper bar (3-5), wherein the first winding copper bar (3-2) is stacked on the second winding copper bar (3-5), and the first winding copper bar (3-2) and the second winding copper bar (3-5) pass through the same magnetic ring; the wiring copper bar comprises a first wiring copper bar (3-1), a second wiring copper bar (3-3), a third wiring copper bar (3-6) and a fourth wiring copper bar (3-4), wherein one end of the first winding copper bar (3-2) is connected to the first wiring copper bar (3-1), and the other end is connected to the second wiring copper bar (3-3), and one end of the second winding copper bar (3-5) is connected to the third wiring copper bar (3-6), and the other end is connected to the fourth wiring copper bar (3-4).

5. The wound wire structure filter according to claim 3, characterized in that: The winding copper bar is connected with the wiring copper bar by screws.

6. The wound wire structure filter according to claim 1, characterized in that: The grounding capacitor assembly (2) comprises a first grounding capacitor (2-2) and a second grounding capacitor (2-1), wherein the second grounding capacitor (2-1) is rotated 90° relative to the first grounding capacitor (2-2) and is placed on a side away from the filter bracket assembly (1).

7. The wound wire structure filter according to claim 1, characterized in that: The filter support assembly comprises a filter support (1-1) and a grounding copper busbar (1-2); one end of the grounding capacitor assembly (2) is connected to the grounding copper busbar (1-2).

8. The wire wound structure filter according to claim 1, characterized in that: The filter bracket assembly (1) is provided with a capacitor mounting groove, and the grounding capacitor assembly (2) is fixed in the capacitor mounting groove by glue dispensing.

9. The wound wire structure filter according to claim 1, characterized in that: The filter support assembly (1) is provided with a limiting groove, and the winding copper busbar assembly (3) is installed on the filter support assembly (1) through the guiding of the limiting groove.

10. The wire wound structure filter according to claim 1, characterized in that: The filter further comprises a rubber pad (5) and a magnetic ring pressing plate (4); the rubber pad (5) is mounted on an end of the magnetic ring away from the filter support assembly (1); and the magnetic ring pressing plate (4) is mounted on the rubber pad (5) and is buckled with the filter support assembly (1).

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