Three-phase common-mode integrated inductor and filtering device

Abstract

The utility model relates to a three-phase common-mode integrated inductor and a filtering device, and belongs to the technical field of inductors. The utility model provides a three-phase common-mode integrated inductor. The three-phase common-mode integrated inductor comprises a magnetic ring; and the single-phase winding comprises a copper wire, the cross section of the copper wire is strip-shaped, the first end of the cross section of the copper wire is in contact with the magnetic ring, and the copper wire is wound on the magnetic ring. The utility model aims to solve the technical problem of serious heating.

Description

Technical Field

[0001] The utility model relates to the technical field of inductors, and more specifically, the utility model relates to a three-phase common-mode integrated inductor and a filtering device. Background Art

[0002] At present, for the application environment of three-phase five-wire, 3 single-phase common-mode inductors or three-phase three-wire common-mode inductors can be used. However, with the continuous increase of the electrical power, in actual operation, due to a large number of differential-mode voltage harmonic components and common-mode voltage harmonic components in the output voltage of various converters and inverters, the harmonic components of the output voltage will exacerbate the heating of the common-mode inductor in the electrical system and affect the operation of the electrical appliance. Summary of the Utility Model

[0003] An object of the utility model is to provide a three-phase common-mode integrated inductor and a filtering device.

[0004] According to a first aspect of the utility model, there is provided a three-phase common-mode integrated inductor, comprising:

[0005] A magnetic core;

[0006] A single-phase winding, the single-phase winding comprising copper wire, the cross-section of the copper wire being strip-shaped, a first end of the cross-section of the copper wire being in contact with the magnetic core, and the copper wire being wound around the magnetic core.

[0007] Optionally, there are six single-phase windings, which are evenly distributed on the magnetic core.

[0008] Optionally, the winding directions and the number of turns of the plurality of single-phase windings are the same.

[0009] Optionally, the single-phase winding further comprises a first contact piece and a second contact piece, the first contact piece is connected to the first end of the copper wire, the second contact piece is connected to the second end of the copper wire, and one end of the first contact piece away from the first end of the copper wire is arranged opposite to one end of the second contact piece away from the second end of the copper wire.

[0010] According to a second aspect of the utility model, there is provided a filtering device, comprising:

[0011] A three-phase common-mode integrated inductor, the three-phase common-mode integrated inductor comprising the three-phase common-mode integrated inductor as described in the first aspect, the three-phase common-mode integrated inductor comprising a single-phase winding and a magnetic core;

[0012] A base, the base comprising a first base and a second base, the first base and the second base being connected by a fixing member, and the three-phase common-mode integrated inductor being arranged inside the base.

[0013] Optionally, the fixing member includes at least two threaded posts, and the threaded posts are respectively threadedly connected to the first base and the second base.

[0014] Optionally, there are three threaded posts, and the three threaded posts are evenly distributed at the edges of the first base and the second base.

[0015] Optionally, a first wire groove for inserting the first contact piece of the single-phase winding is provided on the first base, and a second wire groove for inserting the second contact piece of the single-phase winding is provided on the second base.

[0016] One technical effect of the present utility model is that for a three-phase common-mode integrated inductor provided by the present utility model, the cross-section of the copper wire of the single-phase winding is strip-shaped. This enables there to be a uniform gap between the copper wires when the copper wire of the single-phase winding is wound around the magnetic ring, which increases the contact area between the winding and air, results in a lower temperature rise under high-power conditions, and thus is not easily saturated, making the electrical appliance operate more stably during operation.

[0017] Other features and advantages of the present utility model will become clear through the following detailed description of the exemplary embodiments of the present utility model with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings forming a part of the specification depict embodiments of the present utility model and, together with the description, are used to explain the principles of the present utility model.

[0019] Figure 1 is a schematic structural diagram of a three-phase common-mode integrated inductor according to one embodiment;

[0020] Figure 2 is a schematic structural diagram of a three-phase common-mode integrated inductor according to another embodiment.

[0021] DESCRIPTION OF REFERENCE NUMERALS:

[0022] 1, single-phase winding; 11, first contact piece; 12, second contact piece; 13, copper wire; 2, magnetic ring; 3, first base; 31, first wire groove; 4, threaded post; 5, second base; 51, second wire groove. DETAILED DESCRIPTION

[0023] Now, various exemplary embodiments of the present utility model will be described in detail with reference to the accompanying drawings. It should be noted that: Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present utility model.

[0024] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present utility model, its application, or its use.

[0025] Technologies and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies and devices shall be regarded as part of the specification.

[0026] In all the examples shown and discussed herein, any specific values should be construed as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.

[0027] It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

[0028] A three-phase common-mode integrated inductor provided by the present application, as Figure 1 and Figure 2 shown, the three-phase common-mode integrated inductor includes a magnetic ring 2 and a single-phase winding 1.

[0029] The single-phase winding 1 includes a copper wire 13, the cross-section of the copper wire 13 is strip-shaped, the first end of the cross-section of the copper wire 13 contacts the magnetic ring 2, and the copper wire 13 is wound around the magnetic ring 2.

[0030] In the present application, the single-phase winding 1 is, for example, a flat copper wire 13 winding, the cross-section of the flat copper wire 13 winding can be strip-shaped, and the first end of the cross-section of the copper wire 13 contacts the magnetic ring 2, so that the wider side of the flat copper wire 13 winding can contact the air to improve the heat dissipation efficiency of the three-phase common-mode integrated inductor.

[0031] In the present application, the cross-section of the copper wire 13 of the single-phase winding 1 is strip-shaped, which makes there be a uniform gap between the copper wires 13 when the copper wires 13 of the single-phase winding 1 are wound around the magnetic ring 2, which makes the contact area between the winding and the air larger, the temperature rise generated under high-power conditions is lower, and thus it is not easy to saturate, which makes the electrical appliance operate more stably during the operation process.

[0032] In one embodiment of the present application, as Figure 1 shown, there are six single-phase windings 1, namely single-phase windings 1a - 1g, and they are evenly distributed on the magnetic ring 2.

[0033] In the present application, the evenly distributed windings make the differential-mode components between phases have very high consistency. After being filtered by the integrated common-mode inductor, a better filtering effect can be obtained, the magnetic field interference at the output end can be reduced, and it has better heat dissipation performance, which is beneficial to the suppression point of the backend EMI not drifting and ensures the stability of the circuit. After integration, the manufacturing process difficulty is reduced and the occupied space is saved.

[0034] In one embodiment of the present application, the winding directions and the number of turns of multiple single-phase windings 1 are the same.

[0035] In this application, when differential-mode current flows through the two single-phase windings 1, the magnetic fluxes in the magnetic core 2 cancel each other out, resulting in a small inductance. The differential-mode current can pass through without attenuation, so it can effectively suppress the common-mode interference signal and reduce the impact caused by the differential-mode signal during the normal transmission of the line.

[0036] In one embodiment of this application, as Figure 1 shown, the single-phase winding 1 further includes a first contact piece 11 and a second contact piece 12. The first contact piece 11 is connected to the first end of the copper wire 13, and the second contact piece 12 is connected to the second end of the copper wire 13. One end of the first contact piece 11 away from the first end of the copper wire 13 is arranged opposite to one end of the second contact piece 12 away from the second end of the copper wire 13.

[0037] In this application, the first contact piece 11 and the second contact piece 12 can also be part of the copper wire 13, that is, the copper wire 13, the first contact piece 11, and the second contact piece 12 are integrally formed.

[0038] In this application, by setting the first contact piece 11 and the second contact piece 12, it is convenient to quickly identify the two ends of the single-phase winding 1, and the installation efficiency of the three-phase common-mode integrated inductor is improved.

[0039] A filtering device provided by this application, as Figure 1 shown, includes:

[0040] A three-phase common-mode integrated inductor, which includes the three-phase common-mode integrated inductor in any of the above embodiments. The three-phase common-mode integrated inductor includes a single-phase winding 1 and a magnetic core 2;

[0041] A base, which includes a first base 3 and a second base 5. The first base 3 and the second base 5 are connected by fixing members, and the three-phase common-mode integrated inductor is arranged inside the base.

[0042] In this application, by configuring the base, the three-phase common-mode integrated inductor can be placed inside the base to achieve the purpose of protecting the three-phase common-mode integrated inductor and improving the service life of the filtering device.

[0043] In one embodiment of this application, the fixing members include at least two threaded posts 4, and the threaded posts 4 are respectively threadedly connected to the first base 3 and the second base 5.

[0044] In this application, the first base 3 and the second base 5 are respectively threadedly connected to the threaded posts 4 through bolts to achieve fixation, so as to install the three-phase common-mode integrated inductor into the base.

[0045] In one embodiment of this application, there are three threaded posts 4, and the three threaded posts 4 are evenly distributed at the edges of the first base 3 and the second base 5.

[0046] In this application, the threaded post 4 is, for example, a hexagonal threaded post. The first base 3 and the second base 5 have the hexagonal threaded posts distributed at an angle of 120° respectively at the center of the base. Through the threaded post 4, the first base 3 and the second base 5 are relatively fixed; the hexagonal threaded posts group the single-phase windings 1, enabling the multiple single-phase windings 1 to be evenly distributed on the magnetic ring 2.

[0047] In an embodiment of this application, as Figure 1 shown, a first wire groove 31 for inserting the first contact piece 11 of the single-phase winding 1 is provided on the first base 3, and a second wire groove 51 for inserting the second contact piece 12 of the single-phase winding 1 is provided on the second base 5.

[0048] In this application, by providing the first wire groove 31 and the second wire groove 51, the single-phase winding 1 can pass through the base and be connected to other components in the electrical appliance, facilitating the assembly of the circuit structure of the electrical appliance.

[0049] Although some specific embodiments of the present utility model have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present utility model. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present utility model. The scope of the present utility model is defined by the appended claims.

Claims

1. A three-phase common-mode integrated inductor, characterized in that: include: Magnetic ring; A single-phase winding comprises a copper wire, the cross section of the copper wire is in a strip shape, a first end of the cross section of the copper wire contacts the magnetic ring, and the copper wire is wrapped around the magnetic ring.

2. The three-phase common-mode integrated inductor according to claim 1, characterized in that: There are six single-phase windings, which are evenly distributed on the magnetic ring.

3. The three-phase common-mode integrated inductor according to claim 1 or 2, characterized in that: The winding directions and numbers of turns of the multiple single-phase windings are the same.

4. The three-phase common-mode integrated inductor according to claim 1 or 2, characterized in that: The single-phase winding also includes a first contact piece and a second contact piece, the first contact piece is connected to the first end of the copper wire, the second contact piece is connected to the second end of the copper wire, and an end of the first contact piece away from the first end of the copper wire and an end of the second contact piece away from the second end of the copper wire are arranged opposite to each other.

5. A filtering device, characterized in that: include: A three-phase common-mode integrated inductor, wherein the three-phase common-mode integrated inductor comprises the three-phase common-mode integrated inductor according to any one of claims 1 to 4, and the three-phase common-mode integrated inductor comprises a single-phase winding and a magnetic ring; The base comprises a first substrate and a second substrate, the first substrate and the second substrate are connected via a fixing member, and the three-phase common-mode integrated inductor is arranged in the base.

6. The filtering device according to claim 5, characterized in that The fixing member includes at least two threaded columns, and the threaded columns are respectively threadedly connected to the first base and the second base.

7. The filtering device according to claim 6, characterized in that: There are three threaded columns, and the three threaded columns are evenly distributed at the edges of the first substrate and the second substrate.

8. The filtering device according to claim 5, characterized in that The first substrate is provided with a first wire groove for plugging the first contact piece of the single-phase winding, and the second substrate is provided with a second wire groove for plugging the second contact piece of the single-phase winding.

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