CN210742434U - Frequency conversion series resonance withstand voltage test device - Google Patents
Frequency conversion series resonance withstand voltage test device Download PDFInfo
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- CN210742434U CN210742434U CN201921447293.2U CN201921447293U CN210742434U CN 210742434 U CN210742434 U CN 210742434U CN 201921447293 U CN201921447293 U CN 201921447293U CN 210742434 U CN210742434 U CN 210742434U
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- partition plate
- variable frequency
- series resonance
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 21
- 238000005192 partition Methods 0.000 claims abstract description 35
- 230000005284 excitation Effects 0.000 claims abstract description 10
- 239000003990 capacitor Substances 0.000 claims description 16
- 230000009286 beneficial effect Effects 0.000 description 7
- 239000000428 dust Substances 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
The utility model relates to a frequency conversion series resonance withstand voltage test device, which comprises a shell, a clapboard, a frequency conversion power supply, an excitation transformer, a reactor and a capacitive voltage divider; the partition plates comprise a first partition plate and a second partition plate, a plurality of air holes are formed in the first partition plate and the second partition plate, the first partition plate and the second partition plate are arranged in the shell and divide the interior of the shell into a first area, a second area and a third area, and the second area is located between the first area and the third area; the variable frequency power supply, the exciting transformer, the reactor and the capacitive voltage divider are arranged in the shell, the shell corresponding to the first area and the shell corresponding to the third area are respectively provided with a first fan, the shell corresponding to the second area is provided with a second fan, the first fan is used for sucking air outside the shell into the first area and the third area, and the second fan is used for exhausting the air in the second area. The technical scheme of this application can improve frequency conversion series resonance withstand voltage test device's radiating efficiency, prolongs its life.
Description
Technical Field
The utility model relates to an electric power test technical field especially relates to a frequency conversion series resonance withstand voltage test device.
Background
Frequency conversion series resonance withstand voltage test device is often used for carrying out power frequency alternating current withstand voltage test to generating set, and each part of current frequency conversion series resonance withstand voltage test device is bulky, weight is heavy, and in order to make things convenient for the transport, often integrate each part of frequency conversion series resonance withstand voltage test device in same casing at present. In addition, in order to dissipate heat of the variable frequency series resonance voltage withstand test device, a fan is usually arranged on the shell, and air enters the shell from an air inlet on one side of the shell and is discharged from an air outlet on the other side of the shell. However, the temperature of the air gradually increases from the air inlet into the housing to the air outlet, which results in low heat dissipation efficiency of the components near the air outlet.
SUMMERY OF THE UTILITY MODEL
In order to improve the radiating efficiency of each part of frequency conversion series resonance voltage withstand test device, the utility model provides a frequency conversion series resonance voltage withstand test device.
The utility model provides an above-mentioned technical problem's technical scheme as follows:
the utility model provides a frequency conversion series resonance withstand voltage test device, including casing, baffle, variable frequency power supply, exciting transformer, reactor and capacitive voltage divider.
The baffle includes first baffle and second baffle, first baffle with be equipped with a plurality of bleeder vents on the second baffle, first baffle with the second baffle interval sets up in the casing, and will the casing internal portion separates into first region, second region and third region, the second region is located first region with between the third region.
The variable frequency power supply and the exciting transformer are arranged in the first area, the reactor and the capacitive voltage divider are arranged in the third area, the variable frequency power supply is electrically connected with the input end of the exciting transformer, the reactor and the capacitive voltage divider are connected in series to form a series circuit, and the output end of the exciting transformer is connected in parallel with the series circuit.
The air inlet is respectively formed in the shell corresponding to the first area and the shell corresponding to the third area, a first fan is arranged in the air inlet, an air outlet is formed in the shell corresponding to the second area, a second fan is arranged in the air outlet, the first fan is used for sucking air outside the shell into the first area and the third area, and the second fan is used for exhausting the air in the second area.
The utility model discloses a frequency conversion series resonance withstand voltage test device's beneficial effect is: the shell is divided into a first area, a second area and a third area through the first partition plate and the second partition plate, the second area is located between the first area and the third area, the shell corresponding to the first area and the shell corresponding to the third area are respectively provided with the first fan, when the first fan works, air outside the shell is sucked into the first area and the third area, the air flows through the variable frequency power supply, the exciting transformer, the reactor and the capacitive voltage divider to dissipate heat, then enters the second area through the air holes in the first partition plate and the second partition plate, and when the second fan works on the shell corresponding to the second area, the air in the second area is discharged from the shell. In the technical scheme of this application, the air after the first region of flowing through no longer gets into the third region, and the air after the third region of flowing through no longer gets into the first region, and the air after the intensification is direct discharges from the second region, can improve the radiating efficiency of each part of frequency conversion series resonance withstand voltage test device, prolongs the life of frequency conversion series resonance withstand voltage test device.
Further, the lightning arrester is arranged in the first area and is connected with the output end of the exciting transformer in parallel.
The beneficial effects of the further scheme are as follows: the lightning arrester is used for protecting electrical equipment such as a variable frequency power supply and an exciting transformer from being damaged by high transient overvoltage, limiting follow current time and limiting follow current amplitude, and can protect the safety of the equipment and workers.
Further, the capacitive voltage divider comprises a first capacitor and a second capacitor which are connected in series, and a common connection point of the first capacitor and the second capacitor is electrically connected with a grounding end of the variable frequency power supply.
The beneficial effects of the further scheme are as follows: the two ends of the capacitive voltage divider are connected with the device to be tested in parallel and used for measuring the resonance voltage on the device to be tested, grounding the connection point of the first capacitor and the second capacitor, filtering and protecting the safety of the device and workers.
Further, the number of the first fans is at least one, and the number of the second fans is at least one.
The beneficial effects of the further scheme are as follows: the number of the first fans and the second fans can be set according to needs, and the heat dissipation efficiency can be improved.
Furthermore, the air inlet and the air outlet are both provided with filter screens.
The beneficial effects of the further scheme are as follows: the filter screen is arranged at the air inlet and the air outlet, so that dust in the air entering the shell can be filtered, and equipment failure caused by accumulation of the dust is avoided.
Further, the filter screen and the shell are detachably connected.
The beneficial effects of the further scheme are as follows: the filter screen is convenient to clean or replace subsequently by adopting detachable connection, and is simple, convenient and efficient.
Furthermore, four corners of the bottom side of the shell are respectively provided with a roller.
The beneficial effects of the further scheme are as follows: the rollers are arranged on the bottom side of the shell, so that workers can carry the frequency conversion series resonance voltage withstand test device conveniently.
Drawings
Fig. 1 is a schematic structural diagram of a variable frequency series resonance withstand voltage test apparatus according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a variable frequency series resonance withstand voltage test apparatus according to an embodiment of the present invention;
fig. 3 is a schematic circuit connection diagram of the frequency conversion series resonance withstand voltage test device of the embodiment of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
10. the device comprises a shell, 11, a partition board, 12, a first area, 13, a second area, 14, a third area, 15, a roller, 21, a variable frequency power supply, 22, an exciting transformer, 23, a reactor, 24, a capacitive voltage divider, 25, a lightning arrester, 26, equipment to be tested, 31, a first fan, 32, a second fan, 33, a filter screen, 111, a first partition board, 112, a second partition board, 113 and air holes.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1, fig. 2 and fig. 3, an embodiment of the present invention provides a variable frequency series resonance withstand voltage test apparatus, which includes a casing 10, a partition 11, a variable frequency power source 21, an excitation transformer 22, a reactor 23 and a capacitive voltage divider 24.
The partition 11 includes a first partition 111 and a second partition 112, a plurality of ventilation holes 113 are formed on the first partition 111 and the second partition 112, the first partition 111 and the second partition 112 are spaced in the casing 10 and partition the inside of the casing 10 into a first area 12, a second area 13 and a third area 14, and the second area 13 is located between the first area 12 and the third area 14.
The variable frequency power supply 21 and the exciting transformer 22 are arranged in the first area 12, the reactor 23 and the capacitive voltage divider 24 are arranged in the third area 14, the variable frequency power supply 21 is electrically connected with the input end of the exciting transformer 22, the reactor 23 and the capacitive voltage divider 24 are connected in series to form a series circuit, and the output end of the exciting transformer 22 is connected in parallel with the series circuit.
An air inlet is formed in the shell 10 corresponding to the first area 12 and the shell 10 corresponding to the third area 14, a first fan 31 is arranged in the air inlet, an air outlet is formed in the shell 10 corresponding to the second area 13, a second fan 32 is arranged in the air outlet, the first fan 31 is used for sucking air outside the shell 10 into the first area 12 and the third area 14, and the second fan 32 is used for discharging air in the second area 13.
In this embodiment, the interior of the casing 10 is divided into a first area 12, a second area 13 and a third area 14 by a first partition plate 111 and a second partition plate 112, the second area 13 is located between the first area 12 and the third area 14, the first fan 31 is respectively arranged on the casing 10 corresponding to the first area 12 and the casing 10 corresponding to the third area 14, when the first fan 31 is operated, air outside the casing 10 is sucked into the first area 12 and the third area 14, the air flows through the variable frequency power supply 21, the excitation transformer 22, the reactor 23 and the capacitive voltage divider 24 to dissipate heat, and then enters the second area 13 through the air holes 113 on the first partition plate 111 and the second partition plate 112, and when the second fan 32 on the casing 10 corresponding to the second area 13 is operated, air in the second area 13 is discharged from the casing 10. In the technical scheme of this application, the air after first region 12 of flowing through no longer gets into third region 14, and the air after third region 14 of flowing through no longer gets into first region 12, and the air after the intensification is direct discharges from second region 13, can improve the radiating efficiency of each part of frequency conversion series resonance withstand voltage test device, prolongs its life.
Specifically, the input end of the variable frequency power supply 21 is electrically connected with a 220V or 380V input power supply, the frequency of the input power supply is 50Hz, the variable frequency power supply 21 is used for converting the output of the input power supply into an output signal with adjustable frequency and continuously adjustable voltage, the output end of the variable frequency power supply 21 is electrically connected with the input end of the excitation transformer 22, the excitation transformer 22 is used for boosting the voltage output by the variable frequency power supply 21 and isolating high voltage and low voltage simultaneously, the reactor 23 and the capacitive voltage divider 24 are connected in series to form a series circuit, the series circuit is connected in parallel with the output end of the excitation transformer 22, the reactor 23 is used for carrying out series resonance with the device to be tested 26, the capacitive voltage divider 24 is used for measuring the resonance voltage.
Preferably, the lightning arrester 25 is arranged in the first area 12, and the lightning arrester 25 is connected with the output end of the exciting transformer 22 in parallel.
Specifically, the lightning arrester 25 is used for protecting electrical equipment such as the variable frequency power supply 21 and the exciting transformer 22 from high transient overvoltage, limiting the follow current time and limiting the follow current amplitude, and protecting the safety of the equipment and workers.
Preferably, the capacitive voltage divider 24 includes a first capacitor, i.e. C1 in fig. 2, and a second capacitor, i.e. C2 in fig. 2, connected in series, and a common connection point of the first capacitor C1 and the second capacitor C2 is electrically connected to the ground terminal of the variable frequency power source 21.
Specifically, two ends of the capacitive voltage divider 24 are connected in parallel with the device under test 26, and are used for measuring a resonant voltage on the device under test 26, grounding a connection point of the first capacitor C1 and the second capacitor C2, filtering, and protecting safety of equipment and workers.
Preferably, the number of the first fans 31 is at least one, and the number of the second fans 32 is at least one.
Specifically, the number of the first fan 31 and the second fan 32 may be set as needed, which can improve heat dissipation efficiency, and the second fan 32 is located at the back of the housing 10 in fig. 2.
Preferably, the air inlet and the air outlet are both provided with a filter screen 33.
Specifically, the filter net 33 is disposed at the air inlet and the air outlet to filter out dust in the air entering the housing 10, thereby avoiding equipment failure due to dust accumulation.
Preferably, the filter net 33 is detachably connected to the housing 10.
Specifically, the detachable connection is adopted, so that the filter screen 33 can be cleaned or replaced conveniently and subsequently, and the method is simple, convenient, fast and efficient.
Preferably, rollers 15 are respectively disposed at four corners of the bottom side of the housing 10.
Specifically, the roller 15 is arranged on the bottom side of the shell 10, and the roller 15 is a universal wheel, so that the frequency conversion series resonance voltage withstand test device can be conveniently carried by a worker.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (7)
1. A frequency conversion series resonance withstand voltage test device is characterized by comprising a shell, a partition plate, a frequency conversion power supply, an excitation transformer, an electric reactor and a capacitive voltage divider;
the partition plates comprise a first partition plate and a second partition plate, a plurality of air holes are formed in the first partition plate and the second partition plate, the first partition plate and the second partition plate are arranged in the shell at intervals and divide the interior of the shell into a first area, a second area and a third area, and the second area is located between the first area and the third area;
the variable frequency power supply and the excitation transformer are arranged in the first area, the reactor and the capacitive voltage divider are arranged in the third area, the reactor and the capacitive voltage divider are connected in series to form a series circuit, the variable frequency power supply is electrically connected with the input end of the excitation transformer, and the output end of the excitation transformer is connected in parallel with the series circuit;
the air inlet is respectively formed in the shell corresponding to the first area and the shell corresponding to the third area, a first fan is arranged in the air inlet, an air outlet is formed in the shell corresponding to the second area, a second fan is arranged in the air outlet, the first fan is used for sucking air outside the shell into the first area and the third area, and the second fan is used for exhausting the air in the second area.
2. The variable frequency series resonance withstand voltage test device according to claim 1, further comprising a surge arrester disposed in the first region, the surge arrester being connected in parallel with an output terminal of the exciting transformer.
3. The variable frequency series resonance withstand voltage test device according to claim 1, wherein the capacitive voltage divider comprises a first capacitor and a second capacitor connected in series, and a common connection point of the first capacitor and the second capacitor is electrically connected to a ground terminal of the variable frequency power supply.
4. The variable frequency series resonance withstand voltage test apparatus according to claim 3, wherein the number of the first fans is at least one, and the number of the second fans is at least one.
5. The variable frequency series resonance withstand voltage test device according to any one of claims 1 to 4, wherein a filter screen is installed at both the air inlet and the air outlet.
6. The variable frequency series resonance withstand voltage test device of claim 5, wherein the filter screen is detachably connected to the housing.
7. The variable frequency series resonance withstand voltage test device according to claim 5, wherein rollers are respectively disposed at four corners of the bottom side of the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921447293.2U CN210742434U (en) | 2019-08-30 | 2019-08-30 | Frequency conversion series resonance withstand voltage test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921447293.2U CN210742434U (en) | 2019-08-30 | 2019-08-30 | Frequency conversion series resonance withstand voltage test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210742434U true CN210742434U (en) | 2020-06-12 |
Family
ID=71010483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921447293.2U Expired - Fee Related CN210742434U (en) | 2019-08-30 | 2019-08-30 | Frequency conversion series resonance withstand voltage test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210742434U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023016206A1 (en) * | 2021-08-11 | 2023-02-16 | 杭州大热若寒科技有限责任公司 | Heat dissipation system and heating system |
-
2019
- 2019-08-30 CN CN201921447293.2U patent/CN210742434U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023016206A1 (en) * | 2021-08-11 | 2023-02-16 | 杭州大热若寒科技有限责任公司 | Heat dissipation system and heating system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200612 |