CN220064229U - Choke transformer frequency shift impedance test board - Google Patents

Abstract

The utility model discloses a frequency-shifting impedance test board of a choke transformer, which comprises a test board body, a pressing mechanism and a power supply, wherein the test board body is electrically connected with a binding post of the choke transformer to be tested through a test clamp; the pressing mechanism comprises an inverted L-shaped bracket, a pressing cylinder fixed at the top end of the inverted L-shaped bracket and a pressing plate fixed at the bottom output end of the pressing cylinder, and the choke transformer to be tested is arranged under the pressing plate. The choke transformer frequency-shifting impedance test board adopting the structure downwards presses the choke transformer through the pressing mechanism, and checks the impedance value calculated by the test board in real time in the pressing process until the difference value between the impedance value and the set value does not exceed the set value, namely the choke transformer frequency-shifting impedance test board is qualified, is simple to operate, and improves the test efficiency.

Description

Choke transformer frequency shift impedance test board

Technical Field

The utility model relates to the technical field of frequency shift impedance testing, in particular to a frequency shift impedance test board of a choke transformer.

Background

At present, a transformer is the most commonly used main power equipment of a power system, and has the function of converting low voltage into high voltage for long-distance transmission; or the high voltage is converted into the low voltage to supply power for the terminal customer. The quality of the transformer is good or bad, the operation safety is related to the reliability and safety of power supply, so the transformer is required to detect various performances before leaving the factory through a series of standards, regulations and specifications, and the frequency shift impedance is an important test component.

The existing frequency shift impedance test bench can be used for testing the following contents:

1. frequency shift impedance of the choke transformer traction coil which is not magnetized: open circuit impedance value when the traction coil is loaded with signal voltage of 0.6-8V ZPW-2000 series standard carrier frequency (1700 Hz-2600 Hz).

2. The traction coil is not magnetized with impedance:

1. the traction coil is added with a voltage impedance value of 25Hz and 0.4V;

2. the traction coil is added with a voltage impedance value of 25Hz and 2.5V.

During testing, adjusting bolts on the separator plates of the transformer are required to be manually adjusted, the height between the separator plates at two ends of the transformer is changed, the height of an air gap between the gaskets of the transformer is further changed, meanwhile, the test bench analyzes whether the difference value between the calculated impedance value and the set value is within a set range or not, if yes, the gaskets are required to be changed, the height of the air gap is required to be readjusted until the gaskets are qualified, the operation is complicated, and the workload of staff is increased.

Disclosure of Invention

In order to solve the problems, the utility model provides a frequency-shifting impedance test board of a choke transformer, which is characterized in that the choke transformer is downwards pressed by a pressing mechanism, and the impedance value calculated by the test board is checked in real time in the pressing process until the difference value between the impedance value and a set value does not exceed the set value, so that the test board is qualified, the operation is simple, and the test efficiency is improved.

In order to achieve the above purpose, the utility model provides a frequency-shifting impedance test board of a choke transformer, which comprises a test board body, wherein the test board body is electrically connected with a binding post of the choke transformer to be tested through a test clamp, and the utility model also comprises a pressing mechanism;

the pressing mechanism comprises an inverted L-shaped bracket, a pressing cylinder fixed at the top end of the inverted L-shaped bracket and a pressing plate fixed at the bottom output end of the pressing cylinder, and the choke transformer to be tested is arranged under the pressing plate.

Preferably, the bottom end of the choke transformer to be tested is fixed on the workbench through a positioning plate;

the four corners of locating plate just correspond to the position of the bottom baffle of choke transformer that awaits measuring is provided with the second bolt hole, the bolt pass set up in behind the first bolt hole of bottom baffle with second bolt hole threaded connection.

Preferably, a guide plate is fixed on the inverted-L-shaped support and corresponds to the position of the piston rod of the lower pressure cylinder, a guide hole is formed in the guide plate, and the guide hole is vertically and slidably connected with the piston rod.

Preferably, the lower air cylinder is connected with the air pump through an air pipe, an on-off valve is arranged on the air pipe, and the on-off valve is fixed on the guide plate.

Preferably, the test bench body comprises a main controller, a signal power supply, a function generator and a power amplifier which are sequentially connected, wherein the output end of the power amplifier is connected with the test clamp, and the output end of the power amplifier is also respectively provided with an alternating current true effective value voltmeter and an alternating current ammeter;

the main controller is also connected with a touch screen for setting the test frequency, the test voltage, the amplitude and displaying the test result through the communication module.

The utility model has the following beneficial effects:

1. the air gap height is adjusted through the pushing mechanism, so that the working efficiency is improved and the workload is reduced compared with the manual adjusting screw;

2. simple structure and easy realization.

The technical scheme of the utility model is further described in detail through the drawings and the embodiments.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic circuit diagram of the present utility model;

FIG. 3 is a diagram of a test interface according to the present utility model.

Wherein: 1. a test stand body; 2. an inverted L-shaped bracket; 3. a pressing cylinder; 4. and (5) a lower pressing plate.

Detailed Description

The present utility model will be further described with reference to the accompanying drawings, and it should be noted that, while the present embodiment provides a detailed implementation and a specific operation process on the premise of the present technical solution, the protection scope of the present utility model is not limited to the present embodiment.

The utility model relates to a frequency-shifting impedance test board of a choke transformer, which comprises a test board body 1, wherein the test board body 1 is electrically connected with a binding post of the choke transformer to be tested through a test clamp; the pushing mechanism comprises an inverted L-shaped bracket 2, a pushing cylinder 3 fixed at the top end of the inverted L-shaped bracket 2 and a pushing plate 4 fixed at the bottom output end of the pushing cylinder 3, and a choke transformer to be tested is arranged under the pushing plate 4.

Preferably, the bottom end of the choke transformer to be tested is fixed on the workbench through the positioning plate; the four corners of locating plate and the position that corresponds the bottom baffle of choke transformer that awaits measuring are provided with the second bolt hole, and the bolt passes and sets up behind the first bolt hole of bottom baffle and second bolt hole threaded connection.

Preferably, a guide plate is fixed on the inverted L-shaped bracket 2 and corresponds to the piston rod position of the lower pressure cylinder 3, a guide hole is formed in the guide plate, and the guide hole is vertically and slidably connected with the piston rod.

Preferably, the lower air cylinder 3 is connected with the air pump through an air pipe, and the air pipe is provided with a switch valve which is fixed on the guide plate.

Preferably, the test board body 1 comprises a main controller, a signal power supply, a function generator and a power amplifier which are sequentially connected, wherein the output end of the power amplifier is connected with a test clamp, and the output end of the power amplifier is also respectively provided with an alternating current true effective value voltmeter and an alternating current ammeter; the main controller is also connected with a touch screen for setting test frequency, test voltage, amplitude and displaying test results through a communication module, and the main controller in the embodiment is also connected with a direct current power supply module for supplying power.

And the utility model is selected as follows:

signal power model: SPS-6030PT 110V/25HZ

Function generator model: FY6800

Touch screen model: TPC1570GI

Ac true effective value voltmeter model: MTD-4AV-94-RS

Ac ammeter model: MTD-4AA-94-T

Embodiment one: frequency shift impedance of non-magnetized traction coil of choke transformer

1. The traction coil loads 0.6V signal voltage

Firstly, placing a choke transformer on a positioning plate, enabling four second bolt holes on a bottom end baffle plate of the choke transformer to be aligned with four first bolt holes on the positioning plate one by one, fixing the choke transformer by utilizing bolts, reliably clamping test clamps at two ends of the choke transformer, shorting two binding posts in the middle of the choke transformer, opening a power supply to click a frequency shift test on a touch screen, selecting 1700Hz setting, setting amplitude to input 0.6V, CH1, opening, adjusting voltage by rough voltage adjustment+, rough voltage adjustment, fine voltage adjustment and fine voltage adjustment, opening a switching valve after setting, driving a lower pressure plate 4 to move downwards by a lower pressure cylinder 3 until the calculated impedance value (calculated by an indication I of an alternating current meter and an indication V of an alternating current true effective value voltage meter according to a formula: Z=V/I) is not exceeded, otherwise, adjusting the number of gaskets of the choke transformer, and performing the test again. The same applies to 2000Hz setting, 2300Hz setting, 2600Hz setting. And after the setting is finished, the CH1 is closed.

2. The traction coil is loaded with 8V signal voltage

And the same is adopted, 1700Hz setting, 2000Hz setting, 2300Hz setting and 2600Hz setting are respectively selected, the amplitude is set to 8V, the voltage is regulated through rough voltage adjustment+, rough voltage adjustment-, fine voltage adjustment and fine voltage adjustment, after the setting is finished, a switch valve is opened, a lower pressure cylinder 3 drives a lower pressure plate 4 to move downwards, the top end baffle plate of the transformer is gradually pressed downwards until the difference between the calculated impedance value (the impedance value is calculated according to the formula Z=V/I through the representation value I of an alternating current meter and the representation value V of an alternating current true effective value voltmeter) and the set value does not exceed the set value, the test is qualified, otherwise, the number of gaskets of the choke transformer is regulated, and the test is carried out again. Similarly, 2000Hz, 2300Hz, and 2600Hz were performed under the applied voltage. And after the setting is finished, the CH1 is closed.

In the second embodiment, the traction coil is magnetized impedance

1. The traction coil is loaded with 25Hz and 0.4V voltage

Clicking 25Hz test, setting voltage to 0.4V, starting 25Hz, adjusting voltage by 'coarse voltage adjustment+, coarse voltage adjustment-, fine voltage adjustment+, fine voltage adjustment-' and performing the test after setting. After the test is finished, the 25Hz is closed.

2. The traction coil is loaded with 25Hz and 2.5V voltage

Clicking 25Hz test, setting voltage to 2.5V, starting 25Hz, adjusting voltage by 'coarse voltage adjustment+, coarse voltage adjustment-, fine voltage adjustment+, fine voltage adjustment-' and performing the test after setting. After the test is finished, the 25Hz is closed.

Therefore, the choke transformer frequency-shifting impedance test board adopting the structure downwards presses the choke transformer through the pressing mechanism, and checks the impedance value calculated by the test board in real time in the pressing process until the difference value between the impedance value and the set value does not exceed the set value, namely the choke transformer frequency-shifting impedance test board is qualified, is simple to operate, and improves the test efficiency.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting it, and although the present utility model has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that: the technical scheme of the utility model can be modified or replaced by the same, and the modified technical scheme cannot deviate from the spirit and scope of the technical scheme of the utility model.

Claims (5)

1. The utility model provides a choke transformer moves frequency impedance testboard, includes the testboard body, the testboard body is through test clamp and the terminal electric connection of the choke transformer that awaits measuring, its characterized in that: the device also comprises a pressing mechanism;

the pressing mechanism comprises an inverted L-shaped bracket, a pressing cylinder fixed at the top end of the inverted L-shaped bracket and a pressing plate fixed at the bottom output end of the pressing cylinder, and the choke transformer to be tested is arranged under the pressing plate.

2. A choke transformer frequency-shifting impedance test stand according to claim 1, characterized in that: the bottom end of the choke transformer to be tested is fixed on the workbench through a positioning plate;

the four corners of locating plate just correspond to the position of the bottom baffle of choke transformer that awaits measuring is provided with the second bolt hole, the bolt pass set up in behind the first bolt hole of bottom baffle with second bolt hole threaded connection.

3. A choke transformer frequency-shifting impedance test stand according to claim 1, characterized in that: the guide plate is fixed on the inverted L-shaped support and corresponds to the position of the piston rod of the lower pressure cylinder, a guide hole is formed in the guide plate, and the guide hole is vertically and slidably connected with the piston rod.

4. A choke transformer frequency-shifted impedance testing station as set forth in claim 3 wherein: the lower pressure cylinder is connected with the air pump through an air pipe, a switch valve is arranged on the air pipe, and the switch valve is fixed on the guide plate.

5. A choke transformer frequency-shifting impedance test stand according to claim 1, characterized in that: the test bench body comprises a main controller, a signal power supply, a function generator and a power amplifier which are sequentially connected, wherein the output end of the power amplifier is connected with the test clamp, and the output end of the power amplifier is also respectively provided with an alternating current true effective value voltmeter and an alternating current ammeter;

the main controller is also connected with a touch screen for setting the test frequency, the test voltage, the amplitude and displaying the test result through the communication module.