A roebel coil transformer of a cross structure

Abstract

The utility model discloses a kind of mutual inductors of cross type structure's Rogowski coil, including Rogowski coil body, output end wire, shell, the output end wire is connected with Rogowski coil body both ends, first threading hole and second threading hole are set in shell along circumference direction, first threading hole and second threading hole are parallel, Rogowski coil body one end is inserted into first threading hole and forms first threading section, Rogowski coil body other end is inserted into second threading hole and forms second threading section, first threading section and second threading section axial part coincide. Coil section of cross distribution improves magnetic field coupling uniformity, reduces conductor position sensitivity, reduces measurement error. Cross threading design makes coil evenly distribute in shell interior, eliminates cavity area, without additional shielding device, reduce processing cost;Plug-in assembly can realize quick opening and closing, facilitate installation.

Description

Technical Field

[0001] This utility model relates to the field of current transformer technology, and in particular to a cross-type Rogowski coil current transformer with a compact structure and strong anti-interference capability. Background Technology

[0002] A Rogowski coil is a current transformer used to measure alternating current. Its operating principle is based on electromagnetic induction, offering advantages such as high linearity and no magnetic saturation. However, traditional Rogowski coils, with their single-slot arrangement within the housing, easily create unwound cavities at both ends. These cavities cause uneven magnetic flux distribution, and changes in conductor position can easily lead to measurement errors. To improve magnetic field uniformity, existing technologies typically require adding shielding devices (such as magnetic shielding layers or compensating coils) to the cavity areas. However, this increases the number of components and manufacturing costs, while also limiting product miniaturization. Therefore, there is an urgent need for a Rogowski coil design that can eliminate the effects of cavities while achieving a compact structure. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a cross-type Rogowski coil with a compact structure and strong anti-interference capability. To achieve the above objective, the technical solution provided by this invention is as follows:

[0004] A Rogowski coil current transformer with a cross-type structure includes a Rogowski coil body, an output terminal line, and a housing. The output terminal line is connected to both ends of the Rogowski coil body. A first wire hole and a second wire hole are arranged circumferentially inside the housing. The first wire hole and the second wire hole are parallel. One end of the Rogowski coil body passes through the first wire hole to form a first wire segment, and the other end of the Rogowski coil body passes through the second wire hole to form a second wire segment.

[0005] Preferably, the first threading segment and the second threading segment overlap axially.

[0006] Preferably, one end of the Rogowski coil body is disposed in the first wire hole, and the other end is movably disposed in the second wire hole via a plug-in assembly.

[0007] Optionally, the plug-in assembly includes a rotating buckle disposed on the housing and a buckle disposed at the other end of the Rogowski coil body. The rotating buckle is provided with an L-shaped slot, and the buckle is adapted to the L-shaped slot.

[0008] The advantages and beneficial effects of this utility model are as follows:

[0009] 1. The staggered distribution design at both ends of the Rogowski coil can eliminate the cavity region, improve the uniformity of magnetic field coupling, reduce the sensitivity of conductor position, reduce measurement error, and eliminate the need for additional shielding devices, thus reducing processing costs;

[0010] 2. The staggered distribution design at both ends of the Rogowski coil effectively shortens the axial length of the coil, reduces the overall volume, and makes the structure more compact.

[0011] 3. The plug-in components enable quick opening and closing, facilitating installation. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the current transformer structure of this utility model;

[0013] Figure 2 This is a top view of the current transformer of this utility model;

[0014] Figure 3 This is a schematic diagram of the first threading segment and the second threading segment of this utility model;

[0015] Figure 4 This is a schematic diagram of the plug-in assembly structure of this utility model.

[0016] In the figure: 1. Rogowski coil body; 2. Output terminal wire; 3. Housing; 31. First wire hole; 311. First wire segment; 32. Second wire hole; 321. Second wire segment; 4. Plug-in assembly; 41. Rotary buckle; 42. Buckle; 43. L-shaped slot. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0018] like Figure 1-4 As shown, this utility model provides a Rogowski coil current transformer with a cross-type structure, including a Rogowski coil body 1, an output terminal line 2, and a housing 3. The output terminal line 2 is connected to both ends of the Rogowski coil body 1. The housing 3 has a first wire hole 31 and a second wire hole 32 arranged circumferentially inside. The first wire hole 31 and the second wire hole 32 are parallel. One end of the Rogowski coil body 1 passes through the first wire hole 31 to form a first wire segment 311, and the other end of the Rogowski coil body 1 passes through the second wire hole 32 to form a second wire segment 321.

[0019] The first threading segment 311 and the second threading segment 321 overlap axially.

[0020] One end of the Rogowski coil body 1 is disposed in the first wire hole 31, and the other end is movably disposed in the second wire hole 32 through the plug-in component 4.

[0021] The plug-in assembly 4 includes a rotating buckle 41 disposed on the housing 3 and a buckle 42 disposed at the other end of the Rogowski coil body 1. The rotating buckle 41 is provided with an L-shaped slot 43, and the buckle 42 is adapted to the L-shaped slot 43.

[0022] The specific workflow is as follows: The rotating buckle 41 on the rotating housing 3 allows the buckle 42 at the other end of the Rogowski coil body 1 to disengage from the L-shaped slot 43 on the rotating buckle 41, thus placing the Rogowski coil body 1 in an open-loop state. After the current transformer is fitted onto the conductor to be tested, the buckle 42 at the other end of the Rogowski coil body 1 is slidably inserted into the L-shaped slot 43, and locked in place by rotating the buckle 41. The housing 3 has a first through-hole 31 and a second through-hole 32 arranged circumferentially inside. The first through-hole 31 and the second through-hole 32 are parallel. One end of the Rogowski coil body 1 passes through the first through-hole 31 to form a first through-hole segment 311, and the other end of the Rogowski coil body 1 passes through the second through-hole 32 to form a second through-hole segment 321. Therefore, the Rogowski coil body 1 forms a cross-shaped closed loop, eliminating the cavity area and achieving improved magnetic field coupling uniformity, reduced conductor position sensitivity, and reduced measurement errors without the need for additional shielding devices.

[0023] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A Rogowski coil current transformer with a cross-type structure, comprising a Rogowski coil body (1), an output terminal line (2), and a housing (3), wherein the output terminal line (2) is connected to both ends of the Rogowski coil body (1), characterized in that, The housing (3) is provided with a first wire hole (31) and a second wire hole (32) along the circumferential direction. The first wire hole (31) and the second wire hole (32) are parallel. One end of the Rogowski coil body (1) is inserted into the first wire hole (31) to form a first wire segment (311), and the other end of the Rogowski coil body (1) is inserted into the second wire hole (32) to form a second wire segment (321).

2. The Rogowski coil transformer with a cross-type structure according to claim 1, characterized in that, The first threading segment (311) and the second threading segment (321) partially overlap in axial direction.

3. A Rogowski coil transformer with a cross-type structure according to claim 1, characterized in that, One end of the Rogowski coil body (1) is disposed in the first wire hole (31), and the other end is movably disposed in the second wire hole (32) through the plug-in assembly (4).

4. A Rogowski coil transformer with a cross-type structure according to claim 3, characterized in that, The plug-in assembly (4) includes a rotating buckle (41) disposed on the housing (3) and a buckle (42) disposed on the other end of the Rogowski coil body (1). The rotating buckle (41) is provided with an L-shaped slot (43), and the buckle (42) is adapted to the L-shaped slot (43).

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