Hand-held variable frequency mutual inductor tester

Abstract

The utility model relates to the technical field of mutual inductor testers, in particular to a handheld variable-frequency mutual inductor tester which comprises a main body, a control assembly is fixedly connected to the side face of the main body, and a detection assembly is fixedly connected to the interior of the main body. The high-capacity lithium battery is used for supplying power, an alternating current power supply is not needed, hundreds of groups of CT windings can be tested when the CT windings are fully charged, testing can be carried out while charging is carried out, the touch display screen supports gesture operation, one-key full-automatic analysis testing is carried out, testing is rapid, the CT is automatically demagnetized, whether the CT is qualified or not is automatically evaluated, the built-in memory can store test data of tens of thousands of windings, and the testing efficiency is improved. The test data can be read back to check the stored test data, and the Excel and PDF test reports can be automatically exported through an Excel report export interface in a one-key mode.

Description

Technical Field

[0001] The utility model relates to the technical field of mutual inductor testers, and specifically relates to a handheld variable-frequency mutual inductor tester. Background Technique

[0002] The handheld comprehensive mutual inductor tester is a comprehensive instrument that uses brand-new microelectronic technology to test mutual inductors.

[0003] Currently, in the test and analysis work of mutual inductors, there are a large number of on-site operations. Engineers need to execute according to the step-by-step operation instructions in the form of documents on-site, with a large workload and low efficiency. In addition, the additional configuration of a display screen and a keyboard results in a relatively large volume of the mutual inductor tester, making it inconvenient to move and perform on-site operations. The data after the test needs to be copied separately through a USB transfer interface, increasing the additional workload. Therefore, a handheld variable-frequency mutual inductor tester is needed to improve the above problems. Content of the Utility Model

[0004] In order to solve the problems that in the current test and analysis work of mutual inductors, there are a large number of on-site operations. Engineers need to execute according to the step-by-step operation instructions in the form of documents on-site, with a large workload and low efficiency. In addition, the additional configuration of a display screen and a keyboard results in a relatively large volume of the mutual inductor tester, making it inconvenient to move and perform on-site operations. The data after the test needs to be copied separately through a USB transfer interface, increasing the additional workload. The purpose of the present utility model is to provide a handheld variable-frequency mutual inductor tester to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present utility model provides the following technical solutions:

[0006] A handheld variable-frequency mutual inductor tester includes a main body, a control component is fixedly connected to the side of the main body, and a detection component is fixedly connected to the inside of the main body;

[0007] The control component includes a loading board, a touch display screen and a power switch are fixedly connected to the side of the loading board, and an Excel report export interface and a charger interface are opened on the side of the loading board;

[0008] The detection component includes a supporting board, a large-capacity lithium battery, a CT polarity test module, a CT fast ratio test module, a built-in memory, a CT excitation test module, a PT fast ratio test module, a PT polarity test module and a PT excitation test module are fixedly connected to the side of the supporting board.

[0009] As a preferred solution of the present utility model, a measurement terminal, a grounding terminal, an input terminal and an output terminal are opened on the side of the loading board.

[0010] As a preferred solution of the utility model, spare ports are provided on the side of the loading plate, and three spare ports are provided.

[0011] As a preferred solution of the utility model, mounting holes are provided inside the supporting plate, and four mounting holes are provided.

[0012] As a preferred solution of the utility model, the large-capacity lithium battery, CT polarity test module, CT quick ratio test module, built-in memory, CT excitation test module, PT quick ratio test module, PT polarity test module, and PT excitation test module are all electrically connected.

[0013] As a preferred solution of the utility model, the main body includes a box body, a first radiator is fixedly connected to the top of the box body, and a second radiator is fixedly connected to the bottom of the box body.

[0014] As a preferred solution of the utility model, an alarm lamp and a handle are fixedly connected to the side of the box body, and two handles are provided.

[0015] As a preferred solution of the utility model, a soft cotton pad is fixedly connected to the side of the handle, and a chrome-plated strip is fixedly connected to the side of the box body, and several chrome-plated strips are provided.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0017] 1. In the utility model, by using a large-capacity lithium battery for power supply, no AC power supply is required. It can measure hundreds of groups of CT windings when fully charged, and can also be tested while charging. The touch display screen supports gesture operations, one-key full-automatic analysis and testing, fast testing, automatically demagnetizes the CT, automatically evaluates whether the CT is qualified, the built-in memory can store tens of thousands of winding test data, which is not lost when the power is off, supports reading back and viewing the stored test data, and can automatically export Excel and PDF test reports with one key through the Excel report export interface.

[0018] 2. In the utility model, by using various modules such as the CT polarity test module, CT quick ratio test module, CT excitation test module, PT quick ratio test module, PT polarity test module, and PT excitation test module, the CT and PT can be hierarchically detected, improving the test efficiency and quality, enabling the testers to conduct tests more targeted, discovering and solving corresponding problems at each level, reducing the cost of repairing problems, and improving the efficiency and quality of testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2Schematic diagram of the control component structure of the present utility model;

[0021] Figure 3 Schematic diagram of the detection component structure of the present utility model;

[0022] Figure 4 Schematic diagram of the housing component structure of the present utility model.

[0023] In the figure: 1. Main body; 101. Box body; 102. First radiator; 103. Second radiator; 104. Chrome strip; 105. Alarm lamp; 106. Handle; 107. Soft cotton pad; 2. Control component; 201. Loading plate; 202. Touch display screen; 203. Excel report export interface; 204. Charger interface; 205. Measuring end; 206. Spare port; 207. Grounding end; 208. Power switch; 209. Input end; 210. Output end; 3. Detection component; 301. Support plate; 302. Mounting hole; 303. Large-capacity lithium battery; 304. CT polarity test module; 305. CT rapid ratio test module; 306. Built-in memory; 307. CT excitation test module; 308. PT rapid ratio test module; 309. PT polarity test module; 310. PT excitation test module. Detailed implementation manners

[0024] Next, in combination with the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Embodiment: Please refer to Figures 1-4 A hand-held variable-frequency mutual inductor tester shown in the figure, including a main body 1, a control component 2 fixedly connected to the side of the main body 1, and a detection component 3 fixedly connected to the inside of the main body 1;

[0026] In this embodiment, refer to Figure 1 、 Figure 2 and Figure 3As shown in the figure, the control component 2 includes a loading board 201. A touch display screen 202 and a power switch 208 are fixedly connected to the side of the loading board 201. An Excel report export interface 203 and a charger interface 204 are provided on the side of the loading board 201. The detection component 3 includes a supporting board 301. A large-capacity lithium battery 303, a CT polarity test module 304, a CT quick ratio test module 305, a built-in memory 306, a CT excitation test module 307, a PT quick ratio test module 308, a PT polarity test module 309, and a PT excitation test module 310 are fixedly connected to the side of the supporting board 301. The large-capacity lithium battery 303 is used for power supply, eliminating the need for an AC power supply. It can measure hundreds of groups of CT windings when fully charged and can also be tested while charging. The touch display screen 202 supports gesture operations, enabling one-key fully automatic analysis and testing. The testing is fast, automatically demagnetizes the CT, and automatically evaluates whether the CT is qualified. The built-in memory 306 can store tens of thousands of winding test data, which will not be lost when the power is off, and supports reading back and viewing the stored test data. The Excel, PDF test reports can be automatically exported with one key through the Excel report export interface 203.

[0027] Among them, a measurement terminal 205, a grounding terminal 207, an input terminal 209, and an output terminal 210 are provided on the side of the loading board 201. A spare port 206 is provided on the side of the loading board 201, and three spare ports 206 are provided. Four mounting holes 302 are provided inside the supporting board 301. The large-capacity lithium battery 303, the CT polarity test module 304, the CT quick ratio test module 305, the built-in memory 306, the CT excitation test module 307, the PT quick ratio test module 308, the PT polarity test module 309, and the PT excitation test module 310 are all electrically connected. The CT and PT can be hierarchically detected by using each module such as the CT polarity test module 304, the CT quick ratio test module 305, the CT excitation test module 307, the PT quick ratio test module 308, the PT polarity test module 309, and the PT excitation test module 310, improving the test efficiency and quality, enabling the tester to conduct tests more targeted, discovering and solving corresponding problems at each level, reducing the cost of repairing problems, and improving the efficiency and quality of testing.

[0028] In this embodiment, with reference to Figure 1 and Figure 4As shown in the figure, the main body 1 includes a box body 101. A first radiator 102 is fixedly connected to the top of the box body 101. A second radiator 103 is fixedly connected to the bottom of the box body 101. An alarm lamp 105 and a handle 106 are fixedly connected to the side of the box body 101. There are two handles 106. A soft cotton pad 107 is fixedly connected to the side of the handle 106. A chrome strip 104 is fixedly connected to the side of the box body 101. There are several chrome strips 104. The functions of the first radiator 102 and the second radiator 103 are to absorb the heat of the box body 101 and then dissipate it outside the box body 101 to ensure the normal temperature of the components inside the box body 101.

[0029] In this solution, when a handheld variable-frequency mutual inductor tester is in use, first, CT modeling is performed. Then, a low-voltage signal is injected into the secondary side of the CT. Next, the equivalent parameters of the CT are determined, and all relevant CT performance parameters, all relevant parameters of the CT and its accuracy under different currents and loads are determined. Finally, the test results can be obtained. When the tester is testing, the output terminal 210 and the input terminal 209 are connected to the S1 terminal of the secondary side of the CT under test. The output terminal 210 and the input terminal 209 of the tester are connected to the S2 terminal of the secondary side of the CT under test. The measuring terminal 205 of the tester is correspondingly connected to the P1 / P2 terminal of the primary side of the CT under test. Regarding grounding instructions, if the P2 terminal of the primary side of the CT is grounded, then the measuring terminal 205 of the tester is grounded. If the P1 terminal of the primary side of the CT is grounded, then the measuring terminal 205 of the tester is grounded. Note: Do not reverse the output terminal 210 and the measuring terminal 205 of the tester, which may cause damage to the inside of the tester. When testing the A phase of the high-voltage side of the transformer, the output terminal 210 and the input terminal 209 of the tester are connected to the terminal of the secondary side of the CT under test. The output terminal 210 and the input terminal 209 of the tester are connected to the S2 terminal of the secondary side of the CT under test. The measuring terminal 205 of the tester is correspondingly connected to the A terminal of the high-voltage side of the transformer under test and the N terminal of the high-voltage side of the transformer. The untested high-voltage sides B / C phases, medium-voltage sides A / B / C phases, and low-voltage sides A / B / C phases of the transformer are short-circuited and grounded. The same applies when testing other phases. The casing of the tester is grounded, and then accurate testing can be carried out.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A handheld variable frequency transformer tester, comprising a main body (1), characterized in that: A control component (2) is fixedly connected to the side of the main body (1), and a detection component (3) is fixedly connected to the inside of the main body (1); The control assembly (2) comprises a loading plate (201), a touch screen (202) and a power switch (208) are fixedly connected to the side of the loading plate (201), and an Excel report export interface (203) and a charger interface (204) are provided on the side of the loading plate (201); The detection assembly (3) comprises a supporting plate (301), and a large-capacity lithium battery (303), a CT polarity test module (304), a CT fast ratio test module (305), a built-in memory (306), a CT excitation test module (307), a PT fast ratio test module (308), a PT polarity test module (309), and a PT excitation test module (310) are fixedly connected to the side of the supporting plate (301).

2. A handheld variable frequency transformer tester according to claim 1, characterized in that: A measuring end (205), a grounding end (207), an input end (209) and an output end (210) are provided on the side of the loading plate (201).

3. A handheld variable frequency transformer tester according to claim 1, characterized in that: The side surface of the loading plate (201) is provided with a spare port (206), and three spare ports (206) are provided.

4. The handheld variable frequency transformer tester according to claim 1, characterized in that: The support plate (301) is provided with mounting holes (302) inside, and four mounting holes (302) are provided inside.

5. The handheld variable frequency transformer tester according to claim 1, characterized in that: The large-capacity lithium battery (303), the CT polarity test module (304), the CT fast ratio test module (305), the built-in memory (306), the CT excitation test module (307), the PT fast ratio test module (308), the PT polarity test module (309) and the PT excitation test module (310) are all electrically connected.

6. The handheld variable frequency transformer tester according to claim 1, characterized in that: The main body (1) comprises a box body (101), the top of the box body (101) is fixedly connected to a first radiator (102), and the bottom of the box body (101) is fixedly connected to a second radiator (103).

7. A handheld variable frequency transformer tester according to claim 6, characterized in that: An alarm light (105) and a handle (106) are fixedly connected to the side of the box body (101), and two handles (106) are provided.

8. The handheld variable frequency transformer tester according to claim 7, characterized in that: A soft cotton pad (107) is fixedly connected to the side of the handle (106), and a chrome-plated strip (104) is fixedly connected to the side of the box body (101), and a plurality of chrome-plated strips (104) are provided.

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