Vertical three-phase common-mode inductor

Abstract

The utility model discloses a vertical three-phase common-mode inductor, which relates to the technical field of inductors and comprises a base, a magnetic ring and three groups of coils, the magnetic ring and the three groups of coils are arranged on the base, an insulating shell is arranged outside the magnetic ring, three annular rings are formed on the insulating shell, and three winding areas are formed on the insulating shell by utilizing the three annular rings. The three groups of coils are respectively wound on the three winding areas; six through holes are formed in the base, two pin wires are led out from each group of coils, and the pin wires penetrate through the corresponding through holes; three pieces of insulation separation paper are arranged on the inner side of the insulation shell, the two ends of each piece of insulation separation paper are connected with the inner sides of the adjacent annular rings in an inserted mode, and three spaces which are electrically isolated from one another are formed by the three pieces of insulation separation paper and the three annular rings. Current transmission and electromagnetic interaction between coils are prevented, suppression of common-mode noise and power grid fluctuation is enhanced, the requirements of high-power and high-output application places are met, and a power system is made to operate stably.

Description

Technical Field

[0001] This utility model relates to the field of inductor technology, and in particular to a vertical three-phase common-mode inductor. Background Technology

[0002] A three-phase common-mode inductor is an electronic component used in three-phase power systems, primarily to suppress common-mode noise in circuits. Common-mode noise refers to interference signals that appear in three-phase lines with the same phase and amplitude. These interference signals not only increase electromagnetic interference but can also lead to equipment performance degradation or even malfunction. A three-phase common-mode inductor suppresses this noise by winding three coils on the same magnetic core, utilizing the magnetic field generated by the common-mode current in the core, while minimizing the impact on normal operating current. In modern industrial automation, communication systems, and other fields requiring high-quality power supply, three-phase common-mode inductors play a crucial role. They effectively reduce noise caused by grid fluctuations or the equipment itself, ensuring stable system operation. Especially in power conversion equipment, frequency converters, UPS uninterruptible power supplies, and other high-power applications, three-phase common-mode inductors have become an indispensable component.

[0003] Although three-phase common-mode inductors are widely used in various applications, some shortcomings still exist in practical use. Currently, most commercially available three-phase common-mode inductors achieve their magnetic ring insulation primarily by coating the outer surface of the magnetic ring with paint or by covering the surface with insulating tape. While these two methods can provide the required insulation effect to a certain extent, their insulation strength is clearly insufficient for high-power, high-output applications, failing to meet the more stringent electrical safety requirements.

[0004] Therefore, it is necessary to propose a new technical solution to address the above problems. Utility Model Content

[0005] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can address the insufficient insulation strength in high-power, high-output applications.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a vertical three-phase common mode inductor, comprising a base and a magnetic ring and three sets of coils disposed on the base. An insulating shell is disposed outside the magnetic ring, and three annular rings are formed on the insulating shell. The three annular rings are used to form three winding areas on the insulating shell, and the three sets of coils are respectively wound on the three winding areas.

[0007] The base has six through holes, and two lead wires are led out from each group of coils, with the lead wires passing through the corresponding through holes.

[0008] The inner side of the insulating shell is provided with three insulating sheets, and the two ends of each insulating sheet are inserted into the inner side of the adjacent annular ring, forming three electrically isolated spaces using the three insulating sheets and the three annular rings.

[0009] As a further embodiment of this utility model: a groove is formed on the inner side of the annular ring facing the insulating shell, and the two ends of the insulating paper are respectively inserted into the grooves opened on the inner side of two adjacent annular rings. The grooves are T-shaped, and the ends of the insulating paper inserted into the grooves are provided with bent edges.

[0010] As a further embodiment of this utility model: the length of the insulating paper is greater than the straight-line distance between two adjacent annular rings, so that the insulating paper forms an arched structure after being inserted into the slots at both ends.

[0011] As a further embodiment of this utility model: the lead wires of the three sets of coils are led out after passing through the space formed between the corresponding coil and the insulating paper.

[0012] As a further embodiment of this utility model: the lead wire is wrapped with an insulating flexible tube.

[0013] As a further embodiment of this utility model: the pin wires and the insulating shell are all fixed to the base with epoxy resin adhesive.

[0014] Compared with the prior art, the beneficial effects of this technical solution are as follows: by wrapping the magnetic ring with an insulating shell, the insulation effect between the three sets of coils is improved, effectively preventing the transmission of current and electromagnetic interaction between the three sets of coils, thereby enhancing the suppression of common mode noise and power grid fluctuations. In addition, the insulating shell can also provide physical protection for the magnetic ring, preventing the magnetic ring from being damaged by collisions, friction and other factors during daily use.

[0015] Meanwhile, by adding three insulating sheets, the three sets of coils wound on the magnetic ring with the insulating shell are separated. This makes the three sets of coils separated by the insulating sheets in the inner ring space of the insulating shell, thereby preventing current transmission and electromagnetic interaction between the three sets of coils in the inner ring of the insulating shell, further strengthening the insulation strength between the three sets of coils. This allows the three-phase common mode inductor to meet the electrical safety requirements of high-power, high-output applications, and thus ensures the stable operation of the three-phase power system.

[0016] Furthermore, by using the annular ring set on the insulating shell, three areas are formed on the insulating shell for winding three sets of coils. The annular ring has a protruding structure compared to the insulating shell, which makes it easier to wind the three sets of coils separately on the insulating shell, improves assembly efficiency, and reduces the probability of contact between the three sets of coils.

[0017] The three insulating sheets can be quickly removed from the insulating shell, thus creating a spacious inner ring space within the insulating shell. This facilitates the removal and replacement of the coil when needed. The quick removal and installation of the three insulating sheets also benefits the assembly of three-phase common-mode inductors. For example, the coil can be wound first, and then the three insulating sheets can be inserted, making the inner ring space of the insulating shell more spacious during coil winding, which is more convenient for coil winding.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a cross-sectional schematic diagram of the present invention;

[0022] Figure 3 yes Figure 2 Enlarged schematic diagram of a local structure at point A;

[0023] Figure 4 This is a partial cross-sectional view of the pin wire structure of this utility model;

[0024] The corresponding labels in the attached diagram are explained as follows:

[0025] 1. Base; 2. Magnetic ring; 3. Coil; 31. Lead wire; 4. Insulating shell; 41. Ring; 42. Groove; 5. Insulating paper; 51. Bent edge; 6. Insulating hose. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-4A vertical three-phase common mode inductor includes a base 1, a magnetic ring 2 and three sets of coils 3 disposed on the base 1, an insulating shell 4 is disposed outside the magnetic ring 2, and three rings 41 are formed on the insulating shell 4. The three rings 41 are used to form three winding areas on the insulating shell 4, and the three sets of coils 3 are respectively wound on the three winding areas.

[0028] The base 1 has six through holes. Each group of coils 3 has two lead wires 31. The lead wires 31 pass through the corresponding through holes and are connected to the circuit through the three groups of lead wires 31 of the three groups of coils 3, so that the three-phase common mode inductor acts in the three-phase power circuit.

[0029] Three insulating sheets 5 are provided on the inner side of the insulating shell 4, and the two ends of each insulating sheet 5 are inserted into the inner side of the adjacent ring 41, forming three electrically isolated spaces by the three insulating sheets 5 and the three rings 41.

[0030] When this three-phase common-mode inductor is installed in a power system to suppress common-mode noise and reduce grid fluctuations, the insulating shell 4 surrounding the magnetic ring 2 improves the insulation between the three coils 3, effectively preventing the transmission of current and electromagnetic interaction between the three coils 3, thereby enhancing the suppression of common-mode noise and grid fluctuations. In addition, the insulating shell 4 can also provide physical protection for the magnetic ring 2, preventing it from being damaged by collisions, friction and other factors during daily use.

[0031] Meanwhile, when the three sets of coils 3 are wound on the magnetic ring 2 covered with an insulating shell 4, the three sets of coils 3 are separated by the three insulating sheets 5. This makes the three sets of coils 3 separated by the insulating sheets 5 in the inner ring space of the insulating shell 4, thereby preventing the current transmission and electromagnetic interaction between the three sets of coils 3 in the inner ring of the insulating shell 4, further strengthening the insulation strength between the three sets of coils 3. This allows the three-phase common mode inductor to meet the electrical safety requirements of high-power, high-output applications, and thus ensures the stable operation of the three-phase power system.

[0032] Furthermore, by utilizing the annular ring 41 provided on the insulating shell 4, three areas are formed on the insulating shell 4 for winding three sets of coils 3. The annular ring 41 has a protruding structure compared to the insulating shell 4, which makes it easier for the three sets of coils 3 to be wound separately on the insulating shell 4, thereby improving assembly efficiency and reducing the probability of contact between the three sets of coils 3.

[0033] Preferably, the annular ring 41 has a groove 42 formed on the inner side facing the insulating shell 4. The two ends of the insulating paper 5 are respectively inserted into the grooves 42 opened on the inner side of two adjacent annular rings 41. The grooves 42 are T-shaped, and the ends of the insulating paper 5 inserted into the grooves 42 are provided with bent edges 51.

[0034] Specifically, when the three sets of insulating paper 5 are placed in the inner ring space of the magnetic ring 2, the bent edges 51 at both ends of the insulating paper 5 are aligned with the two adjacent slots 42 and pushed in, so that the bent edges 51 are inserted into the slots 42 which are set in a T-shaped structure. The above operation is repeated to insert the three insulating papers 5 into the corresponding slots 42 in sequence to form a space that is isolated from each other, thereby improving the insulation strength between the three coils 3.

[0035] Meanwhile, the three insulating sheets 5 can be quickly removed from the insulating shell 4, thus making the inner ring space of the insulating shell 4 more spacious, so that the coil 3 can be removed and replaced when needed. The quick removal and installation of the three insulating sheets 5 is also reflected in the assembly of three-phase common mode inductors. For example, the coil 3 can be wound first and then the three insulating sheets 5 can be installed, which makes the inner ring space of the insulating shell 4 more spacious when the coil 3 is wound, making it easier to wind the coil 3.

[0036] Preferably, the length of the insulating paper 5 is greater than the straight-line distance between two adjacent annular rings 41, so that the insulating paper 5 forms an arched structure after being inserted into the slots 42 at both ends.

[0037] Specifically, after all three insulating sheets 5 are inserted into the inner ring space of the insulating shell 4, the three insulating sheets 5 form an arched structure with each other, so that the arched surfaces of the three insulating sheets 5 abut against each other, thereby making the position of the three insulating sheets 5 more stable and preventing the insulating sheets 5 from falling off during use.

[0038] Among them, the insulating paper 5 can be glutinous rice paper, and the paper has a certain thickness to avoid easy damage. Glutinous rice paper has good insulation properties and a high heat resistance level, which can further enhance the insulation strength and quality between coils 3.

[0039] Preferably, the lead wires 31 of the three sets of coils 3 pass through the space formed between the corresponding coil 3 and the insulating paper 5 and are then led out.

[0040] Specifically, when the three sets of coils 3 are wound on the insulating shell 4 and the lead wires 31 are led out, the lead wires 31 are led out by passing through the space separated by the corresponding coil 3 and the insulating paper 5, so that the insulating paper 5 can prevent the lead wires 31 from contacting each other, thereby avoiding affecting the insulation effect between them.

[0041] Preferably, the lead wire 31 is wrapped with an insulating flexible tube 6.

[0042] Specifically, by using an insulating flexible tube 6 to cover the lead wire 31, an additional insulation barrier can be provided for the lead wire 31, thereby further improving the insulation strength between the coils 3. At the same time, the insulating flexible tube 6 can also provide physical protection for the lead wire 31 to prevent wear, scratches or breakage.

[0043] Furthermore, the insulating hose 6 has a certain degree of flexibility, which allows it to adapt to the bending changes of the lead wire 31.

[0044] Preferably, the lead wire 31 and the insulating shell 4 are fixed to the base 1 with epoxy resin glue.

[0045] Epoxy resin adhesive has good insulation properties, heat resistance and mechanical strength, thus maintaining high insulation and protection while fixing the insulating shell 4, the internal magnetic ring 2 and the lead wire 31.

[0046] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A vertical three-phase common-mode inductor, characterized in that, Includes a base (1) and a magnetic ring (2) and three sets of coils (3) disposed on the base (1). An insulating shell (4) is disposed outside the magnetic ring (2). Three rings (41) are formed on the insulating shell (4). The three rings (41) are used to form three winding areas on the insulating shell (4), and the three sets of coils (3) are respectively wound on the three winding areas. The base (1) has six through holes, and each coil (3) has two lead wires (31) leading out, and the lead wires (31) pass through the corresponding through holes; The inner side of the insulating shell (4) is provided with three insulating paper (5), and the two ends of each insulating paper (5) are inserted into the inner side of the adjacent ring (41), so that the three insulating paper (5) and the three ring (41) form three mutually electrically isolated spaces. The annular ring (41) has a groove (42) formed on one side facing the inner side of the insulating shell (4). The two ends of the insulating paper (5) are respectively inserted into the grooves (42) opened on the inner side of two adjacent annular rings (41). The grooves (42) are T-shaped, and the end of the insulating paper (5) inserted into the groove (42) is provided with a bent edge (51). The length of the insulating paper (5) is greater than the straight-line distance between two adjacent annular rings (41), so that the insulating paper (5) forms an arched structure after being inserted into the slots (42) at both ends.

2. The vertical three-phase common-mode inductor according to claim 1, characterized in that, The lead wires (31) from the three sets of coils (3) pass through the space formed between the corresponding coil (3) and the insulating paper (5) and are then led out.

3. The vertical three-phase common-mode inductor according to claim 1, characterized in that, The lead wire (31) is wrapped with an insulating flexible tube (6).

4. The vertical three-phase common-mode inductor according to claim 1, characterized in that, The pin wire (31) and the insulating shell (4) are fixed to the base (1) with epoxy resin glue.

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