Column-type wire-wound resistor

Abstract

The utility model relates to the technical field of resistors, in particular to a column-type wire-wound resistor, which comprises a first disc body and a second disc body which are arranged in parallel at intervals, and a first support column is arranged between the first disc body and the second disc body; a plurality of insulated supporting plates are arranged on the opposite side portions of the first disc body and the second disc body in the circumferential direction at intervals. Each supporting plate is provided with a plurality of threading rings which are arranged at intervals in the length direction of the supporting plate. The flexible resistance wire alternately bypasses the threading rings of the supporting plates of the first disc body and the second disc body, the resistance wire is arranged in a plurality of wave shapes, and the plurality of wave shapes are distributed in the length direction of the supporting plates; and two adjacent wave crests are arranged in a staggered manner in the length direction of the supporting plate. Compared with the prior art, the heat dissipation effect is good, the two adjacent wave-shaped wave crests are arranged in the length direction of the supporting plate in a staggered mode, the mutual heating influence of the resistance wires is reduced through the inner and outer adjacent staggered mode, meanwhile, the inductance can be reduced, and even the non-inductance effect can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of resistor technology, specifically to a cylindrical wire-wound resistor. Background Technology

[0002] High-power resistors are widely used in energy consumption control systems powered by variable frequency motors, starting, speed regulation, and braking control systems of industrial motors, as well as in the neutral point grounding resistance of various industrial electrical appliances' simulated loads and power distribution systems. Existing high-power resistors mainly include wire-wound resistors, thick-film resistors, and chip resistors. Currently, it is difficult to achieve both a small size and sufficient power in high-power resistors. With the development of technology, the integration of power electronic equipment is increasing, and the size requirements for components are becoming more stringent. As an important component in electrical equipment, the performance, size, and power of resistors have a significant impact on the stability of electrical and electronic equipment.

[0003] For example, Chinese patent document CN109065303A discloses a braided wire-wound resistor. In the field of resistor design technology, compared with the prior art, because there are two or more insulating partition layers in the box, each insulating partition layer is provided with multiple shuttle positions, and the resistor strip is flexible and the resistor strip is meandered through different shuttle positions, the overall structure is more compact. It is possible to wind a longer resistor strip in the insulating partition layer with a fixed box volume to meet the needs of high power use.

[0004] For example, Chinese patent document CN209515352U discloses a high-power resistor in the field of resistors. Compared with traditional wire-wound resistors, the entire resistor strip is clamped onto a support plate. This clamping structure reduces the space occupied and improves the overall space utilization for the same power. In the same space, a longer resistor strip can be arranged, increasing the resistance power. There is no need to coat the resistor strip with an insulating layer or bake it for fixation, thus making manufacturing faster and more time-saving, reducing manufacturing costs. Traditional wire-wound resistors have a screw in the middle, shortening the creepage distance, while this resistor strip is only supported by the support frame, eliminating the need for additional fastening mechanisms. This removal of the traditional screw extends the creepage distance, resulting in better overall insulation performance of the product.

[0005] Chinese patent document CN117747230A discloses a method for manufacturing a large-diameter wire-wound resistor, including a bending step, a plate insertion step, a plate embedding step, and a fixing step. For large-diameter resistor strips, the bending step first bends and winds the resistor strip. During the bending and winding process, it is not constrained by the partition plate and can be shaped by its own strength. After shaping, the resistor body is then separated by a partition plate in the plate insertion step. To facilitate the insertion of the partition plate, the partition plate in the U-shape is divided into two pieces. The two partition plates are inserted laterally into the U-shape and then moved longitudinally to allow the dividing groove to engage the bent segment of the metal strip, thus smoothly placing the partition plate and positioning the bent segment of the metal strip. The positioning plate embedded in the plate embedding step supports and positions the laterally adjacent partition plates and positions the metal strip laterally, improving insulation safety performance.

[0006] Most existing wire-wound resistors have slotted wires on the board, but the board has high air resistance, which affects heat dissipation performance to some extent. Summary of the Invention

[0007] In view of the above-mentioned technical problems existing in the prior art, this utility model provides a cylindrical wire-wound resistor.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A cylindrical wire-wound resistor is provided, comprising a first disk and a second disk arranged in parallel and separated from each other, with a first support column disposed between the first disk and the second disk;

[0010] Multiple insulating support plates are arranged circumferentially on the opposing sides of the first and second discs, with each support plate arranged radially along the first / second disc; each support plate is provided with multiple threading rings arranged along its own length.

[0011] It also includes flexible resistance wires that alternately wrap around the threading loops of the support plates of the first and second disks, thereby arranging the resistance wires in multiple wavy patterns, with the multiple wavy patterns distributed along the length of the support plates; the crests of two adjacent wavy patterns are staggered along the length of the support plates.

[0012] As a further optional solution, a third disk is also included. The first, second, and third disks are arranged in sequence at intervals, and a second support is provided between the second and third disks. The support plate and resistance wire are also provided between the second and third disks, and their arrangement is the same as that of the support plate and resistance wire between the first and second disks.

[0013] As a further optional solution, the sides of the first and third discs facing the second disc are respectively provided with multiple first positioning grooves for the support plate to be embedded, and the sides of the second disc facing the first and third discs are respectively provided with multiple second positioning grooves for the support plate to be embedded.

[0014] As a further alternative, the support plate is interference-fitted with the first positioning groove / second positioning groove, which allows the support plate to be moved or removed along its own length under the action of external force.

[0015] As a further alternative, the first, second, and third discs are all discs, and the first and second pillars are cylinders located at the center of the discs.

[0016] As a further alternative, the first, second, and third discs are made of ceramic.

[0017] The beneficial effects of this utility model are:

[0018] This utility model discloses a cylindrical wire-wound resistor. Compared with the prior art, the resistance wire is wound in a wavy shape between different disks, which has a good heat dissipation effect. Furthermore, the peaks of two adjacent wavy shapes are staggered along the length of the support plate. This staggered arrangement of adjacent inner and outer parts reduces the mutual heating effect of the resistance wires and can also reduce inductance, or even achieve zero inductance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a cylindrical wire-wound resistor in one of the embodiments.

[0020] Figure 2 This is a structural schematic diagram of a cylindrical wire-wound resistor from another perspective in one of the embodiments.

[0021] Figure 3 This is a schematic diagram of the structure of a cylindrical wire-wound resistor in one embodiment, after the resistance wires are hidden.

[0022] Figure label:

[0023] First disc 1, second disc 2, third disc 3, first support column 4, second support column 5, first positioning groove 6, second positioning groove 7, support plate 8, threading ring 81, resistance wire 9. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0025] This embodiment provides a cylindrical wire-wound resistor, such as... Figures 1 to 3As shown, it includes a first disc 1 and a second disc 2 arranged side by side and separated by a first support 4 between the first disc 1 and the second disc 2, thereby defining the relative positions of the first disc 1 and the second disc 2.

[0026] Multiple insulating support plates 8 are arranged circumferentially on the opposing sides of the first disc 1 and the second disc 2, with each support plate 8 arranged radially along the first disc 1 / second disc 2; each support plate 8 is provided with multiple threading rings 81 arranged along its own length.

[0027] The resistor also includes flexible resistance wires 9, which alternately wrap around the threaded loops 81 of the support plates 8 of the first disk 1 and the second disk 2, thus arranging the resistance wires 9 in multiple wavy patterns. These multiple wavy patterns are distributed along the length of the support plate 8. The peaks / troughs of adjacent wavy patterns are staggered along the length of the support plate 8. The multiple wavy patterns can be the same continuous resistance wire 9 or different resistance wires 9. The multiple wavy resistance wires 9 are arranged from the inside out, with adjacent inner and outer wavy patterns staggered to reduce the mutual heating effect of the resistance wires 9, thereby reducing inductance and even achieving zero inductance.

[0028] Specifically, the resistor in this embodiment also includes a third disk 3. The first disk 1, the second disk 2 and the third disk 3 are arranged in sequence at intervals. A second support column 5 is provided between the second disk 2 and the third disk 3, thereby defining the relative position of the second disk 2 and the third disk 3. The support plate 8 and the resistance wire 9 are also provided between the second disk 2 and the third disk 3, and their arrangement is the same as that of the support plate 8 and the resistance wire 9 between the first disk 1 and the second disk 2.

[0029] Specifically, the first disc 1 and the third disc 3 are respectively provided with a plurality of first positioning grooves 6 for the support plate 8 to be embedded on the side facing the second disc 2, and the second disc 2 is respectively provided with a plurality of second positioning grooves 7 for the support plate 8 to be embedded on the side facing the first disc 1 and the third disc 3.

[0030] Specifically, the support plate 8 has an interference fit with the first positioning groove 6 / second positioning groove 7, allowing the support plate 8 to move or be pulled away along its length under external force. The number of support plates 8 can be increased or decreased according to resistance and power requirements to achieve resistance and power adjustment. The position of the support plate 8 can be moved to adjust the tension of the resistance wire 9. In practice, the support plate 8 can be threaded through before being embedded into the corresponding slot in the disk body.

[0031] Specifically, the first disc 1, the second disc 2, and the third disc 3 are all discs, and the first support 4 and the second support 5 are cylinders located at the center of the discs.

[0032] Specifically, the first plate 1, the second plate 2, and the third plate 3 are ceramic parts.

[0033] In practice, it can be modified so that the first support 4 and / or the second support 5 are cylindrical, with multiple air holes on their side walls. Through the connected external air duct, the air holes blow air from the inside to the outside to dissipate heat from the resistance wire 9.

[0034] In practice, resistance wire is either a solid structure with sufficient strength, or a hollow tube structure that is easy to bend and wind.

[0035] In the description of this utility model, it is obvious that the described embodiments are only a part of the embodiments of this utility model, and not all of them. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the above detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0037] In the description of this utility model, it should be noted that the terms "middle," "upper," "lower," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

Claims

1. A cylindrical wire-wound resistor, characterized in that: It includes a first disc (1) and a second disc (2) arranged side by side and separated from each other, with a first support (4) provided between the first disc (1) and the second disc (2); The first disc (1) and the second disc (2) are respectively arranged in a circumferentially separated manner with multiple insulating support plates (8). Each support plate (8) is arranged radially along the first disc (1) / second disc (2). Each support plate (8) is provided with multiple threading rings (81) arranged separately along its own length. It also includes flexible resistance wires (9), which alternately pass around the threading loops (81) of the support plates (8) of the first disk (1) and the second disk (2), so that the resistance wires (9) are arranged in multiple wavy shapes, and the multiple wavy shapes are distributed along the length direction of the support plate (8); the peaks of two adjacent wavy shapes are staggered along the length direction of the support plate (8).

2. A cylindrical wire-wound resistor according to claim 1, characterized in that: It also includes a third disc (3), with the first disc (1), the second disc (2) and the third disc (3) arranged in sequence at intervals. A second support column (5) is provided between the second disc (2) and the third disc (3). The support plate (8) and resistance wire (9) are also provided between the second disc (2) and the third disc (3), and their arrangement is the same as that of the support plate (8) and resistance wire (9) between the first disc (1) and the second disc (2).

3. A cylindrical wire-wound resistor according to claim 2, characterized in that: The first disc (1) and the third disc (3) are provided with multiple first positioning grooves (6) for the support plate (8) to be embedded on the side facing the second disc (2), and the second disc (2) is provided with multiple second positioning grooves (7) for the support plate (8) to be embedded on the side facing the first disc (1) and the third disc (3).

4. A cylindrical wire-wound resistor according to claim 3, characterized in that: The support plate (8) is interference-fitted with the first positioning groove (6) / the second positioning groove (7), and can move or pull away the support plate (8) along its own length direction under the action of external force.

5. A cylindrical wire-wound resistor according to claim 2, characterized in that: The first disc (1), the second disc (2), and the third disc (3) are discs, and the first support (4) and the second support (5) are cylinders located at the center of the discs.

6. A cylindrical wire-wound resistor according to claim 2, characterized in that: The first plate (1), the second plate (2), and the third plate (3) are ceramic parts.

Images