A filter for filtering out lightning surges
By designing a filter that includes multi-stage filtering circuits and overvoltage protection, the problem of poor suppression of high-frequency lightning surges by existing filters has been solved, achieving efficient filtering of lightning surges and protecting the stable operation of equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SJEC RES INST CO LTD
- Filing Date
- 2025-08-15
- Publication Date
- 2026-07-21
AI Technical Summary
Existing filters have limited effectiveness in suppressing high-frequency lightning surges, making it difficult to effectively protect high-precision equipment.
A filter comprising a first connecting line, a filter body, and a second connecting line is designed. The filter body is equipped with multi-stage filtering circuits and an overvoltage protection device. The connecting lines are made of highly conductive materials and equipped with heat dissipation modules, enabling direct installation on target equipment to achieve efficient filtering of lightning surges.
Significantly reduces equipment failure and error rates, and improves equipment stability and lifespan.
Smart Images
Figure CN224537787U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power grid filtering, specifically to a filter for filtering out lightning surges. Background Technology
[0002] In daily life, we often encounter voltage surges caused by lightning strikes or power grid switching; this phenomenon is called a lightning surge. Lightning surges are extremely destructive to electronic equipment, especially precision instruments, potentially causing damage or even complete failure. To ensure the stable operation of electronic equipment, protective devices for filtering lightning surges are needed in the circuit. Currently, most filters on the market use simple inductor-capacitor filtering structures, but their suppression effect on high-frequency surges is limited and cannot meet the protection requirements of high-precision equipment. Therefore, there is an urgent need for a filter with a reasonable structure, fast response speed, and efficient lightning surge filtering capability to overcome the above-mentioned shortcomings. Utility Model Content
[0003] The purpose of this invention is to provide a filter for filtering out lightning surges, which can be directly installed on the target device, thereby protecting the target device from the effects of lightning surges and reducing the failure rate and error rate of the target device.
[0004] To achieve the above objectives, this utility model provides a filter for filtering out lightning surges, the filter comprising: a first connecting line, a filter body, and a second connecting line;
[0005] The first connecting line is connected to the input terminal of the target device;
[0006] The filter body is connected to the target device via the first connecting line, and the filter body is used to filter out lightning surges.
[0007] The second connecting line is connected to the ground terminal of the target device, and the filter body is also connected to the ground terminal of the target device through the second connecting line.
[0008] In another embodiment, the filter body is provided with multiple stages of filtering circuits, each stage of which consists of an inductor and a capacitor.
[0009] In another embodiment, the filter body is further provided with an overvoltage protection device, which is used to disconnect the filter body from the target device when the lightning surge voltage exceeds a preset value.
[0010] In another embodiment, both the first connecting wire and the second connecting wire are made of a material with high conductivity.
[0011] In another embodiment, the filter body is further provided with a heat dissipation module, which is used to dissipate heat from the filter body.
[0012] In another embodiment, the target device is a frequency converter.
[0013] The beneficial effects of this utility model are as follows: The filter designed in this utility model for filtering lightning surges comprises the following key parts: a first connecting line, a filter body, and a second connecting line. Specifically, the first connecting line is specifically used for a stable connection to the input terminal of the target device; the filter body is effectively connected to the target device through this first connecting line, and its main function is to efficiently filter out interference caused by lightning surges. Furthermore, the second connecting line is responsible for a reliable connection to the grounding terminal of the target device, ensuring that the filter body is not only connected to the target device through the first connecting line, but also forms a closed loop with the grounding terminal of the target device through the second connecting line. This design allows the filter to be directly installed on the target device, thereby effectively protecting the target device from lightning surges, significantly reducing the failure rate and error rate of the target device, and improving the stability and service life of the device.
[0014] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of a filter for filtering out lightning surges, as shown in one embodiment of this application. Detailed Implementation
[0016] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0017] It should be noted that references to "an embodiment," "embodiment," "example embodiment," etc., in this specification refer to the described embodiment including specific features, structures, or characteristics; however, not every embodiment must include these specific features, structures, or characteristics. Furthermore, such expressions do not refer to the same embodiment. Moreover, when describing specific features, structures, or characteristics in conjunction with embodiments, whether or not explicitly described, it is indicated that incorporating such features, structures, or characteristics into other embodiments is within the knowledge of those skilled in the art.
[0018] Furthermore, certain terms are used in the specification and subsequent claims to refer to specific components or parts. Those skilled in the art will understand that manufacturers may use different names or terms to refer to the same component or part. This specification and subsequent claims do not distinguish components or parts by differences in name, but rather by differences in function. The terms "comprising" and "including" used throughout the specification and subsequent claims are open-ended and should be interpreted as "including but not limited to." Additionally, the term "connection" here includes any direct and indirect electrical connection means. Indirect electrical connection means include connections made through other means.
[0019] Please see Figure 1 , Figure 1 A schematic diagram of a filter for filtering lightning surges is provided. The filter includes: a first connecting line, a filter body, and a second connecting line; the first connecting line is connected to the input terminal of a target device; the filter body is connected to the target device via the first connecting line, and the filter body is used to filter lightning surges; the second connecting line is connected to the ground terminal of the target device, and the filter body is also connected to the ground terminal of the target device via the second connecting line.
[0020] Specifically, the first connection line has three wires. The filter used to filter out lightning surges is connected to the target device through the first and second connection lines and supplies power to the target device normally. When a lightning surge occurs, the current input to the target device needs to pass through the lightning surge filter first. After the lightning surge is filtered out by the lightning surge filter, the normal current is input to the target device to ensure the normal operation of the target device.
[0021] Optionally, the filter body is provided with multiple stages of filtering circuits, each stage of which consists of an inductor and a capacitor.
[0022] Specifically, the filter body internally incorporates multi-stage filtering circuits, i.e., multiple filtering elements. These elements work together to effectively filter out lightning surges of various frequencies, ensuring that the target equipment is not damaged. Furthermore, the filter body utilizes high-quality materials and advanced manufacturing processes, resulting in high reliability and durability, capable of withstanding various harsh environmental conditions. In practical applications, users simply need to connect the filter's first and second connection lines to the input and ground terminals of the target equipment, respectively, to achieve the lightning surge filtering function; operation is simple and quick.
[0023] Optionally, the filter body is also provided with an overvoltage protection device, which is used to disconnect the filter body from the target device when the lightning surge voltage exceeds a preset value.
[0024] Specifically, when the voltage is too high, it may cause irreversible damage to the target equipment. The overvoltage protection device can disconnect the filter body from the target equipment when the lightning surge voltage exceeds the preset value, thereby ensuring that the target equipment is not damaged by high voltage.
[0025] Optionally, both the first and second connecting wires are made of materials with high conductivity.
[0026] Specifically, both the first and second connecting wires are made of highly conductive materials, which can increase the lifespan of the filter used to filter out lightning surges.
[0027] Optionally, the filter body is further provided with a heat dissipation module, which is used to dissipate heat from the filter body.
[0028] Specifically, during the filtering process, the filter body may generate heat due to lightning surges. Therefore, a heat dissipation module can help the filter body dissipate heat, thereby increasing the lifespan of the filter used to filter out lightning surges.
[0029] Optionally, the target device is a frequency converter.
[0030] Specifically, the target device can be a frequency converter, but is not limited to a frequency converter; the target device can be any device that may be affected by lightning surges.
[0031] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0032] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A filter for filtering out lightning surges, characterized in that, The filter includes: a first connecting line, a filter body, and a second connecting line; The first connecting line is connected to the input terminal of the target device; The filter body is connected to the target device via the first connecting line, and the filter body is used to filter out lightning surges. The second connecting line is connected to the ground terminal of the target device, and the filter body is also connected to the ground terminal of the target device through the second connecting line.
2. The filter for filtering lightning surges as described in claim 1, characterized in that, The filter body is equipped with multiple stages of filtering circuits, each of which consists of an inductor and a capacitor.
3. The filter for filtering lightning surges as described in claim 2, characterized in that, The filter body is also equipped with an overvoltage protection device, which is used to disconnect the filter body from the target device when the lightning surge voltage exceeds a preset value.
4. The filter for filtering lightning surges as described in claim 3, characterized in that, Both the first and second connecting wires are made of materials with high conductivity.
5. The filter for filtering lightning surges as described in claim 4, characterized in that, The filter body is also provided with a heat dissipation module, which is used to dissipate heat from the filter body.
6. The filter for filtering lightning surges as described in any one of claims 1-5, characterized in that, The target device is a frequency converter.