An alternating current power frequency load leakage detection device
By designing an AC power frequency load leakage current detection device, and utilizing a leakage current peak acquisition module and a main control module for leakage current detection, the high cost problem caused by the need to install a separate leakage current monitoring and protection device for each device in the existing technology is solved, thus achieving low-cost leakage current detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU IND PARK TIANHE INSTR CO LTD
- Filing Date
- 2025-07-29
- Publication Date
- 2026-07-03
AI Technical Summary
In the existing technology, leakage current protection switches used in low-voltage electrical appliances can only monitor and protect the total leakage current of the power supply line, and cannot be equipped with a separate leakage current monitoring and protection device for each device, which leads to increased equipment costs.
Design an AC power frequency load leakage current detection device, which includes a leakage current peak acquisition module, a main control module and a communication module. The leakage current peak value is acquired using a current transformer and a half-wave rectifier circuit, and then converted by the main control module and sent to the execution device through the communication module to realize leakage current detection of the target device.
It significantly reduces the cost of leakage current detection. Leakage current detection can be completed using only the leakage current peak acquisition module and the main control module. The leakage current situation is processed through the communication module, which reduces the equipment cost.
Smart Images
Figure CN224456997U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of leakage current detection, specifically to an AC power frequency load leakage current detection device. Background Technology
[0002] In modern industrial production, most equipment is powered by industrial frequency AC power. For personal safety reasons, it is necessary to dynamically measure the leakage current of such equipment during operation.
[0003] However, the leakage current protection devices used in low-voltage electrical appliances now monitor and protect the total leakage current of various devices on the power supply line, rather than equipping each device with a separate leakage current monitoring and protection device. This is because leakage current protection devices are expensive, and if each device were to be equipped with a separate leakage current monitoring and protection device, it would lead to a significant increase in equipment costs. Therefore, there is an urgent need for an AC power frequency load leakage current detection device that can overcome the above-mentioned defects. Utility Model Content
[0004] The purpose of this invention is to provide an AC power frequency load leakage current detection device. This device can complete the leakage current detection of the target device using only a leakage current peak acquisition module and a main control module. Furthermore, it can also process the leakage current target device using a communication module, which significantly reduces the cost of leakage current detection.
[0005] To achieve the above objectives, this utility model provides an AC power frequency load leakage current detection device, the device comprising: a leakage current peak acquisition module, a main control module, and a communication module;
[0006] The leakage current peak acquisition module is used to acquire the leakage current peak value of the target device and transmit the leakage current peak value to the AC-DC converter of the main control module;
[0007] The main control module is used to read the peak value of the leakage current according to the AC-DC converter, and to calculate the leakage current according to the peak value of the leakage current.
[0008] The main control module is also used to send the leakage current to the execution device through the communication module.
[0009] In another embodiment, the leakage current peak acquisition module includes a current transformer and a half-wave rectified current peak circuit.
[0010] The current transformer is disposed between the power supply terminal and the access terminal of the target device, and the current transformer is used to acquire the sampling current.
[0011] The half-wave rectified current peak circuit is used to perform half-wave rectification on the sampled current to obtain the leakage current peak value.
[0012] In another embodiment, a live wire and a neutral wire are provided between the power supply terminal and the access terminal of the target device;
[0013] The current transformer is used to obtain the current difference between the live wire and the neutral wire as the sampling current.
[0014] In another embodiment, the current transformer consists of an inductor, a resistor, and a capacitor.
[0015] In another embodiment, the device further includes a power supply module;
[0016] The power supply module is used to supply power to the entire AC power frequency load leakage current detection device.
[0017] The beneficial effects of this utility model are as follows: The AC power frequency load leakage current detection device of this utility model includes a leakage current peak acquisition module, a main control module, and a communication module; the leakage current peak acquisition module is used to acquire the leakage current peak value of the target device and transmit the leakage current peak value to the AC-DC converter of the main control module; the main control module is used to read the leakage current peak value according to the AC-DC converter and calculate the leakage current according to the leakage current peak value; the main control module is also used to send the leakage current to the execution device through the communication module. This device can complete the leakage current detection of the target device using only the leakage current peak acquisition module and the main control module, and the communication module can also realize the processing of the leakage target device, significantly reducing the cost of leakage current detection.
[0018] 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
[0019] Figure 1 This is a schematic diagram of the structure of an AC power frequency load leakage current detection device according to an embodiment of this application;
[0020] Figure 2 This is a circuit diagram of an AC power frequency load leakage current detection device according to an embodiment of this application. Detailed Implementation
[0021] 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.
[0022] 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.
[0023] 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.
[0024] Please see Figure 1 , Figure 1 This is a schematic diagram of an AC power frequency load leakage current detection device. The device includes: a leakage current peak acquisition module, a main control module, and a communication module. The leakage current peak acquisition module is used to acquire the leakage current peak value of the target device and transmit the leakage current peak value to the AC-DC converter of the main control module. The main control module is used to read the leakage current peak value from the AC-DC converter and calculate the leakage current based on the leakage current peak value. The main control module is also used to send the leakage current to the execution device through the communication module.
[0025] Specifically, the leakage current peak acquisition module includes a current transformer and a half-wave rectified current peak circuit; the current transformer is located between the power supply terminal and the access terminal of the target device, and the current transformer is used to acquire the sampling current; the half-wave rectified current peak circuit is used to perform half-wave rectification processing on the sampling current to obtain the leakage current peak value.
[0026] Specifically, a live wire and a neutral wire are provided between the power supply end and the access end of the target device; the current transformer is used to obtain the current difference between the live wire and the neutral wire as the sampling current.
[0027] Specifically, the current transformer consists of an inductor, a resistor, and a capacitor.
[0028] Specifically, the device also includes a power supply module; the power supply module is used to supply power to the entire AC power frequency load leakage current detection device.
[0029] For example, such as Figure 2 As shown, Figure 2 This is a circuit diagram of an AC power frequency load leakage current detection device. Taking the leakage current detection of a target device as an example, the AC power frequency load leakage current detection device is explained. When leakage current detection of the target device is required, inductor T1 is placed between the live wire and the neutral wire between the power supply terminal and the input terminal of the target device. When a current difference is detected between the live wire and the neutral wire, this current difference is collected as a sampling current through R1 and C1. This sampling current is half-wave rectified by a half-wave rectifier current peak circuit composed of IC1A, D1, and C2 to obtain the leakage current peak value. Then, it is AC-DC converted through R2 by the second pin of the main control module, so that the main control module can obtain the leakage current peak value. The main control module converts the leakage current peak value to obtain the leakage current. Finally, the leakage current is transmitted to the execution device through the serial port TTL level of pins 13 and 14, so that the execution device can process the target device and improve the leakage current situation.
[0030] The AC power frequency load leakage current detection device in the above embodiment includes a leakage current peak acquisition module, a main control module, and a communication module. The leakage current peak acquisition module is used to acquire the leakage current peak value of the target device and transmit the leakage current peak value to the AC-DC converter of the main control module. The main control module is used to read the leakage current peak value from the AC-DC converter and calculate the leakage current based on the leakage current peak value. The main control module is also used to send the leakage current to the execution device through the communication module. This device can complete the leakage current detection of the target device using only the leakage current peak acquisition module and the main control module, and the communication module can also be used to process the leakage target device, significantly reducing the cost of leakage current detection.
[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. An alternating current power frequency load leakage detection device, characterized in that, The device includes: a leakage current peak acquisition module, a main control module, and a communication module; The leakage current peak acquisition module is used to acquire the leakage current peak value of the target device and transmit the leakage current peak value to the AC-DC converter of the main control module; The main control module is used to read the peak value of the leakage current according to the AC-DC converter, and to calculate the leakage current according to the peak value of the leakage current. The main control module is also used to send the leakage current to the execution device through the communication module.
2. The alternating current line frequency load leakage detection device of claim 1, wherein, The leakage current peak acquisition module includes a current transformer and a half-wave rectified current peak circuit. The current transformer is disposed between the power supply terminal and the access terminal of the target device, and the current transformer is used to acquire the sampling current. The half-wave rectified current peak circuit is used to perform half-wave rectification on the sampled current to obtain the leakage current peak value.
3. The alternating line frequency load leakage detection device of claim 2, wherein, A live wire and a neutral wire are provided between the power supply terminal and the access terminal of the target device; The current transformer is used to obtain the current difference between the live wire and the neutral wire as the sampling current.
4. The alternating current line frequency load leakage detection device of claim 3, wherein, The current transformer consists of an inductor, a resistor, and a capacitor.
5. The alternating current line frequency load leakage detection device of claim 1, wherein, The device also includes a power supply module; The power supply module is used to supply power to the entire AC power frequency load leakage current detection device.