CN215833544U - Variable frequency resonance test circuit - Google Patents
Variable frequency resonance test circuit Download PDFInfo
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- CN215833544U CN215833544U CN202120955430.4U CN202120955430U CN215833544U CN 215833544 U CN215833544 U CN 215833544U CN 202120955430 U CN202120955430 U CN 202120955430U CN 215833544 U CN215833544 U CN 215833544U
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- battery pack
- storage battery
- voltage
- variable
- frequency resonance
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Abstract
The utility model discloses a variable frequency resonance test circuit. The device comprises a storage battery pack formed by connecting a plurality of storage batteries, wherein the storage battery pack is connected with a frequency conversion circuit, the frequency conversion circuit is connected with the primary side of an excitation transformer, one end of the secondary side of the excitation transformer is connected with one end of an electric reactor, the other end of the electric reactor is respectively connected with a capacitive voltage divider and one end of a test article, the other ends of the capacitive voltage divider and the test article are connected with the other end of the secondary side of the excitation transformer, the detection end of the capacitive voltage divider is connected with a voltage sampling unit, the frequency conversion circuit and the voltage sampling unit are respectively connected with a controller, and the controller is connected with a man-machine interaction module and a power module. The utility model provides power supply through the storage battery pack, converts the direct current voltage provided by the storage battery pack into the alternating current voltage with corresponding frequency through the frequency conversion circuit, provides the alternating current voltage to the excitation transformer, can set relevant parameters and check the voltage value applied to a test article through the man-machine interaction module, and is convenient to use in a test occasion where commercial power is difficult to obtain.
Description
Technical Field
The utility model relates to the technical field of high-voltage tests, in particular to a variable-frequency resonance test circuit.
Background
The power supplies adopted by field high-voltage tests such as high-voltage cables, transformers and the like are generally mains supply and generators, the field high-voltage tests belong to a handover test before power-on or a preventive test after power failure, the mains supply is difficult to obtain on the field, or temporary cables which are used when the access ports of the mains supply are far away are long, and some construction difficulties and potential safety hazards can be brought. The generator is adopted to supply power to the test variable frequency resonance test circuit, the power supply of the generator mainly generates air pollution and noise pollution, and the noise brings inconvenience and potential safety hazard to the field management of the high-voltage test.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a variable-frequency resonance test circuit aiming at the defects in the prior art.
In order to achieve the purpose, the utility model provides a variable frequency resonance test circuit which comprises a storage battery pack formed by connecting a plurality of storage batteries, wherein the storage battery pack is connected with a variable frequency circuit, the variable frequency circuit is connected with a primary side of an excitation transformer, one end of a secondary side of the excitation transformer is connected with one end of an electric reactor, the other end of the electric reactor is respectively connected with a capacitive voltage divider and one end of a test article, the other ends of the capacitive voltage divider and the test article are connected with the other end of the secondary side of the excitation transformer, a detection end of the capacitive voltage divider is connected with a voltage sampling unit, the variable frequency circuit and the voltage sampling unit are respectively connected with a controller, and the controller is connected with a human-computer interaction module and a power supply module.
Furthermore, the power module is connected with a storage battery.
Further, the storage battery pack is connected with a capacitor C1 in parallel.
Furthermore, the model of the power supply module is WRB1205 YGD-2W.
Further, the controller comprises a single chip microcomputer.
Further, the human-computer interaction module comprises a touch screen.
Has the advantages that: the utility model provides power supply through the storage battery pack, converts the direct current voltage provided by the storage battery pack into the alternating current voltage with corresponding frequency through the frequency conversion circuit, provides the alternating current voltage to the excitation transformer, can set relevant parameters and check the voltage value applied to a test article through the man-machine interaction module, and is convenient to use in a test occasion where commercial power is difficult to obtain.
Drawings
Fig. 1 is a schematic structural diagram of a variable frequency resonance test circuit according to an embodiment of the present invention.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and specific examples, which are carried out on the premise of the technical solution of the present invention, and it should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a variable frequency resonance test circuit, which includes a storage battery pack 1 formed by connecting a plurality of storage batteries, wherein the connection modes between the plurality of storage batteries include series connection and parallel connection, the series connection is used for increasing an output voltage of the storage battery pack 1, the parallel connection is used for increasing a capacity of the storage battery pack 1, and the storage battery pack 1 with corresponding voltage and capacity can be assembled according to needs. The storage battery pack 1 is connected with a frequency conversion circuit, and the frequency conversion circuit is in the prior art and can be formed by connecting 4 MOS tubes. The frequency conversion circuit is connected with the primary side of an excitation transformer T1, one end of the secondary side of the excitation transformer T1 is connected with one end of a reactor 2, the other end of the reactor 2 is respectively connected with a capacitive voltage divider 3 and one end of a test sample, and the test sample refers to a product to be tested, such as a transformer, a cable and the like. The other ends of the capacitive voltage divider 3 and the test sample are connected with the other end of the secondary side of the exciting transformer T1, the detection end of the capacitive voltage divider 3 is connected with the voltage sampling unit 5, and the voltage sampling unit 5 comprises a voltage sensor and a voltage sampling circuit connected with the voltage sensor. Specifically, the capacitive voltage divider 3 includes a capacitor C2 and a capacitor C3 connected in series, a sampling terminal is connected between the capacitor C2 and the capacitor C3, and the voltage sensor and the voltage sampling circuit can convert the voltage between the capacitor C2 and the capacitor C3 into a low-voltage signal for output. The frequency conversion circuit and the voltage sampling unit 5 are respectively connected with the controller 4, and the controller can adopt a singlechip. The controller 4 converts the direct-current voltage provided by the storage battery pack 1 into alternating-current voltage with corresponding frequency to output by controlling the frequency conversion circuit to work. The controller 4 is connected with a human-computer interaction module 6 and a power supply module 7. The controller 4 obtains the working power supply from the power supply module 7, and the controller 4 can calculate the high-voltage value applied to the test sample through the low-voltage signal provided by the voltage sampling unit 5. The human-computer interaction module 5 can adopt a touch screen and can be used for setting frequency conversion parameters of a frequency conversion circuit, displaying a high-voltage value applied to a sample and the like.
The power module 7 is preferably connected to a battery. The storage battery can be one of storage battery packs, and a separate storage battery can be adopted to supply power to the controller 4 and the human-computer interaction module 6. For voltage stabilization, it is preferable to connect capacitor C1 in parallel to battery pack 1. The model of the power supply module is preferably WRB1205YGD-2W, and the power supply module can convert the voltage provided by the storage battery into 5V voltage for output. Because test places are mostly outdoor, also can set up photovoltaic module for storage battery 1, when outdoor environment is not tested, be connected photovoltaic module and storage battery 1, directly utilize solar energy to charge.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that other parts not specifically described are within the prior art or common general knowledge to those of ordinary skill in the art. Without departing from the principle of the utility model, several improvements and modifications can be made, and these improvements and modifications should also be construed as the scope of the utility model.
Claims (6)
1. The variable-frequency resonance test circuit is characterized by comprising a storage battery pack formed by connecting a plurality of storage batteries, wherein the storage battery pack is connected with a variable-frequency circuit, the variable-frequency circuit is connected with the primary side of an excitation transformer, one end of the secondary side of the excitation transformer is connected with one end of a reactor, the other end of the reactor is respectively connected with a capacitive voltage divider and one end of a test article, the other ends of the capacitive voltage divider and the test article are connected with the other end of the secondary side of the excitation transformer, the detection end of the capacitive voltage divider is connected with a voltage sampling unit, the variable-frequency circuit and the voltage sampling unit are respectively connected with a controller, and the controller is connected with a human-computer interaction module and a power supply module.
2. The variable frequency resonance test circuit according to claim 1, wherein the power module is connected to a battery.
3. The variable frequency resonance test circuit according to claim 1, wherein the battery pack is connected in parallel with a capacitor C1.
4. The variable frequency resonance test circuit according to claim 1, wherein the power module is of the type WRB1205 YGD-2W.
5. The variable frequency resonance test circuit of claim 1, wherein the controller comprises a single chip microcomputer.
6. The variable frequency resonance test circuit according to claim 1, wherein the human-computer interaction module comprises a touch screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120955430.4U CN215833544U (en) | 2021-05-07 | 2021-05-07 | Variable frequency resonance test circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120955430.4U CN215833544U (en) | 2021-05-07 | 2021-05-07 | Variable frequency resonance test circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215833544U true CN215833544U (en) | 2022-02-15 |
Family
ID=80188837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120955430.4U Active CN215833544U (en) | 2021-05-07 | 2021-05-07 | Variable frequency resonance test circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215833544U (en) |
-
2021
- 2021-05-07 CN CN202120955430.4U patent/CN215833544U/en active Active
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