CN207895062U - transformer test device - Google Patents
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- CN207895062U CN207895062U CN201721714298.8U CN201721714298U CN207895062U CN 207895062 U CN207895062 U CN 207895062U CN 201721714298 U CN201721714298 U CN 201721714298U CN 207895062 U CN207895062 U CN 207895062U
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Abstract
The utility model is related to a kind of transformer test devices, including：Voltage shift control module, voltage transformation module, information acquisition module；Voltage transformation module is serially connected in mutual inductor secondary side circuit；Voltage shift control module is configured as the test voltage that AC power frequency voltage is converted to mutual inductor secondary side circuit by control voltage transformation module, and test voltage is variable voltage；Information acquisition module is configured as the voltage signal and current signal of acquisition mutual inductor.Voltage conversion device is controlled by voltage shift control module, and AC power frequency supply is converted into the measurement voltage for being suitable for measuring mutual inductor, and the voltage signal and current signal of the mutual inductor using information acquisition module acquisition, realize the test to mutual inductor, the transformer test device that the utility model embodiment provides is without providing large power supply, the test to high saturation voltage, high saturation current can be realized, greatly reduce the volume of transformer test device, convenient test.
Description
Technical field
The utility model is related to electricity fields, more particularly to a kind of transformer test device.
Background technology
Mutual inductor is that primary side high current/voltage is converted into secondary side low current/voltage according to electromagnetic induction principle
The instrument of measurement is used to provide the current/voltage information of power grid to devices such as measurement, meterings or be provided to devices such as relay protections
Electric network fault current information.
Currently, the both ends that power frequency sine wave power supply is connected on mutual inductor secondary side are mostly used, to test mutual inductor.But
During realization, inventor has found that at least there are the following problems in traditional technology：In traditional technology, using power frequency sine wave electricity
The mode of mutual inductor is surveyed in source, when testing the mutual inductor of high saturation voltage, high saturation current, due to power frequency sine wave power supply power supply
Ability cannot meet test request, need external boosting/up-flow device, cause power volume, weight excessive, it has not been convenient to test.
Utility model content
Based on this, it is necessary to for the problem that test is inconvenient, provide a kind of transformer test apparatus and system.
To achieve the goals above, on the one hand, the utility model embodiment provides a kind of transformer test device, packet
It includes：Voltage shift control module, voltage transformation module, information acquisition module；Voltage transformation module is serially connected in mutual inductor secondary side
In circuit；
Voltage shift control module be configured as control voltage transformation module AC power frequency voltage is converted to it is different mutual
The test voltage of sensor secondary side circuit；
Information acquisition module is configured as the voltage signal and current signal of acquisition mutual inductor.
Voltage transformation module includes in one of the embodiments,：Rectification unit, pressure regulation unit and inversion unit；
Rectification unit is configured as AC power frequency voltage commutation being the first DC voltage, and according to voltage conversion and control mould
First DC voltage is transferred to pressure regulation unit by the control of block；
Pressure regulation unit is configured as the first DC voltage being adjusted to the second DC voltage, and according to voltage shift control module
Control the second DC voltage is transferred to inversion unit；
Inversion unit is configured as according to the control of voltage shift control module being test electricity by the second DC voltage inversion
Pressure.
Transformer test device further includes square wave/sine voltage handover module in one of the embodiments,；Square wave/
The input of sine voltage handover module terminates voltage transformation module, the secondary side circuit of output termination mutual inductor；And square wave/just
String wave voltage handover module is configured as the control according to voltage shift control module, and test voltage is converted to square-wave test electricity
Pressure or sine wave test voltage to mutual inductor secondary side circuit.
Transformer test device further includes electromagnetic compatibility processing module in one of the embodiments, and at electromagnetic compatibility
Reason module is configured as carrying out electromagnetic compatibility processing to AC power frequency voltage and is transferred to voltage transformation module.
Transformer test device further includes voltage output module, voltage output module concatenation in one of the embodiments,
In mutual inductor secondary side circuit, and it is configured as carrying out steady pressure treatment to square wave test voltage or sine wave test voltage.
Information acquisition module includes in one of the embodiments,：First information collecting unit and the second information collection list
Member；First information collecting unit is used to acquire the voltage signal and current signal of side loop of mutual inductor, the second information collection
Unit is used to acquire the voltage signal and current signal of mutual inductor secondary side circuit.
Transformer test device further includes message processing module in one of the embodiments, message processing module by with
It is set to acquisition and handles the voltage signal and current signal of the mutual inductor of information acquisition module acquisition.
Transformer test device further includes power adaptation module in one of the embodiments,；
Power adaptation module is configured as being converted to AC power frequency voltage into the operating voltage of voltage shift control module.
Rectification unit includes PFC rectification circuits in one of the embodiments,；The input termination exchange of PFC rectification circuits
Power-frequency voltage, output termination voltage transformation module.
Inversion unit includes full bridge inverter in one of the embodiments,；The input termination of full bridge inverter is adjusted
Press the output end of unit, the secondary side circuit of output termination mutual inductor.
The utility model has the following advantages that and advantageous effect：Voltage conversion device is controlled by voltage shift control module
AC power frequency supply is converted into the measurement voltage suitable for measuring mutual inductor, and using the mutual inductor of information acquisition module acquisition
Voltage signal and current signal, voltage shift control module controls voltage transformation module, and the voltage of output can meet mutual inductance
Device test request, to realize the test to mutual inductor, the transformer test device that the utility model embodiment provides is without carrying
For large power supply, you can realize the test to high saturation voltage, high saturation current, greatly reduce transformer test device
Volume, convenient test.
Description of the drawings
By being more particularly described for the preferred embodiment of the utility model shown in attached drawing, addressed on the utility model
Other purposes, feature and advantage will become more fully apparent.Identical reference numeral indicates identical part in whole attached drawings, and
Actual size equal proportion scaling is not pressed deliberately and draws attached drawing, it is preferred that emphasis is the purport of the utility model is shown.
Fig. 1 is the first structure schematic diagram of the utility model transformer test device embodiment；
Fig. 2 is the second structural schematic diagram of the utility model transformer test device embodiment；
Fig. 3 is the third structural schematic diagram of the utility model transformer test device embodiment；
Fig. 4 is the structure of square wave/sine voltage handover module in one embodiment of the utility model transformer test device
Schematic diagram；
Fig. 5 is the 4th structural schematic diagram of the utility model transformer test device embodiment；
Fig. 6 is the 5th structural schematic diagram of the utility model transformer test device embodiment.
Specific implementation mode
The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model,
It states.The preferred embodiment of the utility model is given in attached drawing.But the utility model can in many different forms come in fact
It is existing, however it is not limited to embodiment described herein.Make public affairs to the utility model on the contrary, purpose of providing these embodiments is
It is more thorough and comprehensive to open content.
It should be noted that when an element is considered as " connection " another element, it can be directly to separately
One element and it is in combination be integrated, or may be simultaneously present centering elements.Term as used herein " installation ", " one
End ", " other end " and similar statement are for illustrative purposes only.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with the technology for belonging to the utility model
The normally understood meaning of technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term " and or " used herein includes
Any and all combinations of one or more relevant Listed Items.
The utility model embodiment provides a kind of transformer test device, as shown in Figure 1, above-mentioned transformer test device packet
It includes：Voltage shift control module 110, voltage transformation module 120, information acquisition module 130；Voltage transformation module 120 is serially connected in
In mutual inductor secondary side circuit；Voltage shift control module 110 is configured as control voltage transformation module 120 by AC power frequency electricity
Pressure is converted to the test voltage of mutual inductor secondary side circuit, and the test voltage is variable voltage；Information acquisition module 130 by with
It is set to the voltage signal and current signal of acquisition mutual inductor.
Wherein, AC power frequency voltage refers to the power industry of national regulation and the unified exchange normal voltage of electrical equipment, example
Such as, the AC power frequency voltage of China's Mainland is 220V/50Hz.Specifically, the input termination AC power frequency of voltage transformation module 120
Voltage, output end access the secondary side circuit of mutual inductor.When carrying out transformer test, voltage shift control module 110 controls
The AC power frequency voltage of access is converted to the test voltage for meeting test request, voltage transformation module by voltage transformation module 120
120 export test voltage to the secondary side circuit of mutual inductor, and test voltage is provided for mutual inductor；Mutual inductor secondary side circuit is logical
After entering test voltage, information acquisition module 130 acquires the voltage signal and current signal of mutual inductor, according to the voltage signal of acquisition
The parameters such as mutual inductor exciting characteristic curve, electric current no-load voltage ratio are obtained with current signal.
Optionally, voltage shift control module 110 controls the output of voltage transformation module 120 and is gradually decreased as from saturation voltage
0 test voltage carries out mutual inductor characteristic test, and each electrical voltage point tests multiple cycles, 130 sampled voltage of information acquisition module
The corresponding exciting current value of point.For example, testing 8 cycles to each electrical voltage point.Optionally, it is preset when test voltage frequency is less than
Threshold frequency when, reduce each electrical voltage point test cycle.For example, the electrical voltage point test cycle after reducing can be 4, in advance
If threshold frequency can be 10Hz, when test voltage be more than 10Hz when, information acquisition module 130 to each electrical voltage point test 8
A cycle, when voltage shift control module 110, which controls the test voltage frequency that voltage transformation module 120 exports, is less than 10Hz,
Information acquisition module 130 tests 4 cycles to each electrical voltage point, to improve testing efficiency.
The output of voltage transformation module 120 is controlled using voltage shift control module 110 and is gradually decreased as 0 from saturation voltage
Test voltage carries out mutual inductor characteristic test, and when the exciting characteristic curve etc. to mutual inductor measures, mutual inductor characteristic is surveyed
Demagnetization processing need not be carried out to mutual inductor, saved the testing time, improved testing efficiency after the completion of examination, obtained test knot
Fruit accuracy improves, and the test device built-up circuit of this characteristic that mutual inductor is measured using voltage method is less, measuring accuracy
It is high.
In one of the embodiments, as shown in Fig. 2, voltage transformation module 120 includes：Rectification unit 121, pressure regulation unit
122 and inversion unit 123；
Rectification unit 121 is configured as AC power frequency voltage commutation being the first DC voltage, and is converted and controlled according to voltage
First DC voltage is transferred to pressure regulation unit 122 by the control of molding block 110；
Pressure regulation unit 122 is configured as the first DC voltage being adjusted to the second DC voltage, and according to voltage conversion and control
Second DC voltage is transferred to inversion unit 123 by the control of module 110；
Inversion unit 123 is configured as
Test voltage.
Specifically, the input termination AC power frequency voltage of rectification unit 121, output termination pressure regulation unit 122, rectification unit
The AC power frequency voltage of access is converted to DC voltage and transformed DC voltage is transferred to pressure regulation unit 122 by 121；It adjusts
Pressure unit 122 carries out voltage adjustment processing to the DC voltage received, can be specifically the size for adjusting voltage, pressure regulation unit
DC voltage after adjustment is transferred to inversion unit 123, the direct current that inversion unit 123 transmits pressure regulation unit 122 by 122
Voltage inversion is the test voltage of alternating voltage form, exports secondary side circuit of the test voltage to mutual inductor.Wherein, pressure regulation list
Member 122 can recommend regulating circuit, and inversion unit 123 may include full bridge inverter.
Optionally, voltage shift control module 110 respectively with rectification unit 121, pressure regulation unit 122 and inversion unit 123
Connection, voltage shift control module 110 are configured as control rectification unit 121 and AC power frequency voltage are converted to DC voltage,
And control pressure regulation unit 122 adjusts DC voltage, voltage shift control module 110 is additionally configured to control inversion unit 123 will
DC voltage inversion after pressure regulation unit 122 adjusts is test voltage, and test voltage is provided for the secondary side circuit of mutual inductor.Its
In, rectification unit 121, pressure regulation unit 122 and 123 course of work of inversion unit are identical as the processing procedure in above-described embodiment,
Therefore not to repeat here.
AC power frequency voltage commutation is first obtained into direct current in the utility model embodiment, then being obtained by pressure regulation, inversion can
The test voltage of Frequency variable voltage is applied to the both ends S1 and S2 of mutual inductor secondary side, tests mutual inductor.It utilizes
Frequency variation method tests the measured power that mutual inductor characterisitic parameter needs will be much smaller than the measured power needed for conventional test methodologies so that
Transformer test device volume weight reduces, and test process safety, simply, working efficiency improves, and labor intensity reduces.
And it by controlling rectification unit 121, pressure regulation unit 122 and inversion unit 123, may be implemented to test electricity
The voltage value of pressure and the adjustment of frequency are not necessarily to additional boosting/up-flow device to meet the test request of mutual inductor, you can full
Sufficient testing requirement substantially reduces the volume of test device, is convenient for carrying, and facilitates test.And the technical solution in the present embodiment
The adjusting to test voltage frequency etc. may be implemented, test voltage can be controlled and proceed by test from any voltage value, for example,
Test can be proceeded by from saturation voltage point, then be gradually reduced the test that test voltage carries out next step, completed in test
It is not necessarily to carry out demagnetization processing to mutual inductor afterwards, the testing time is greatly reduced, improves testing efficiency.
Rectification unit 121 includes PFC rectification circuits in one of the embodiments, and the input termination of PFC rectification circuits is handed over
Flow power-frequency voltage, output termination voltage transformation module.The AC power frequency voltage of access is carried out PFC rectifications by rectification unit 121.Example
Such as, Ke Yishi, when city's pressure that AC power frequency voltage is 220V, 220V AC power frequency voltage commutations are by PFC rectification circuits
The DC voltage of 380V.Input current may be implemented using the progress rectification of PFC rectification circuits and follow input voltage, to realize list
The correction of position power factor, operates steadily.
Inversion unit 123 includes full bridge inverter in one of the embodiments,；The input of full bridge inverter terminates
The output end of pressure regulation unit, the secondary side circuit of output termination mutual inductor.The direct current that full bridge inverter exports pressure regulation unit
Voltage carries out full-bridge inverting, exports the alternating test voltage of sine wave to the secondary side circuit of mutual inductor.Full-bridge inverting
Switching current is small, is suitable for the high power requirements of transformer test, can better meet test request.
In one of the embodiments, as shown in figure 3, transformer test device further includes square wave/sine voltage switching
Module 140；The input of square wave/sine voltage handover module 140 terminates voltage transformation module 120, output termination mutual inductor
Secondary side circuit；And square wave/sine voltage handover module 140 is configured as the control according to voltage shift control module 110,
Test voltage is converted into square-wave test voltage or sine wave test voltage to the secondary side circuit of mutual inductor.
Wherein, square wave/sine voltage handover module 140 in the form of square wave or sine wave for exporting test voltage
To the secondary side circuit of mutual inductor, mutual inductor characteristic test is carried out.The output of square wave/sine voltage handover module 140 terminates
The secondary side circuit of mutual inductor, output termination voltage transformation module 120.Square wave/140 receiving voltage of sine voltage handover module
Conversion module 120 export test voltage, and according to voltage shift control module 110 control control, export square-wave voltage or
Sine voltage.Optionally, as shown in figure 4, square wave/sine voltage handover module 140 may include filter circuit and switch
Circuit, switching circuit include first switch and the second switch, and first switch input terminates voltage transformation module 120, and output end is logical
It crosses filter circuit and connects mutual inductor；Second switch input termination voltage transformation module 120, output termination mutual inductor；First switch and
Second switch is connect with voltage shift control module 110, and is controlled by voltage shift control module 110.It is surveyed when needing square wave
When trying voltage, voltage shift control module 110 controls first switch disconnection, second switch is closed, and test voltage is directly with square wave
Voltage form is exported to the secondary side circuit of mutual inductor, carries out mutual inductor characteristic test.
For example, when carrying out excitation characteristic test, first the resistance value of mutual inductor is tested with DC voltage, determines mutual inductance
The saturation current of device, if resistance value is less than 1 ohm, then the saturation current of mutual inductor is 5 amperes, otherwise the saturation of mutual inductor is electric
Stream is 1 ampere；Saturation voltage is obtained according to the resistance value of saturation current and mutual inductor；Voltage shift control module 110 controls voltage
120 output duty cycle of conversion module is the square-wave test voltage of 50% variable ratio frequency changer transformation, and square-wave test voltage passes through square wave/sine
Wave voltage handover module 140 provides test voltage with square to mutual inductor, and optionally, voltage shift control module 110 is controlled
The initial voltage for the test voltage that voltage transformation module 120 and square wave processed/sine voltage handover module 140 export is mutual inductor
Saturation voltage, then control test voltage slowly reduces until be 0, excitation curve test is done to mutual inductor, optionally, to every
A electrical voltage point tests 8 cycles, and information acquisition module 130 samples corresponding exciting current value, when electric voltage frequency is less than 10Hz's
When, 4 cycles are tested to each electrical voltage point.
When needing sine wave test voltage, it is disconnected that voltage shift control module 110 controls first switch closure, second switch
It opens, is exported to the secondary side circuit of mutual inductor with the test voltage of sine wave after the filtered circuit filtering of test voltage, into
Row mutual inductor characteristic test.Such as, test the no-load voltage ratio of mutual inductor, than the mutual inductors characteristic such as poor, angular difference when, voltage shift control module
110 control voltage transformation modules 120 export suitable frequency, the sine wave test voltage of voltage, and square wave/sine voltage switches mould
Block 140 exports transformed sine wave test voltage and exports to the secondary side circuit of mutual inductor, output the same with above-described embodiment
The sine wave test voltage of different voltages value tests multiple cycles to each electrical voltage point, and information acquisition module 130 samples corresponding
Voltage signal and current signal obtain the no-load voltage ratio of mutual inductor, than the mutual inductors characterisitic parameter such as poor, angular difference.
The conducting of switching circuit is controlled by voltage shift control module 110 and is cut off to realize test voltage waveform
Control carries out specific aim test, using square-wave test voltage to mutual inductor to realize to the different characteristics in mutual inductor characteristic
Exciting characteristic curve tested, exciting current mobility scale smaller is obtained when being tested than sine wave test voltage, more
Add stabilization.Voltage transformation module 120 and square wave/sine voltage are controlled especially by voltage shift control module 110 simultaneously
Handover module 140 is realized that test voltage gradually decreases to 0 carry out mutual inductor characteristic test from the saturation voltage of mutual inductor, is tested
After without demagnetizing to mutual inductor, save the testing time, improve testing efficiency.
In one of the embodiments, as shown in figure 5, transformer test device further includes electromagnetic compatibility processing module 150,
And electromagnetic compatibility processing module 150 is configured as carrying out electromagnetic compatibility processing to AC power frequency voltage and is transferred to voltage modulus of conversion
Block 120.
The input termination AC power frequency voltage of electromagnetic compatibility processing module 150, output termination voltage transformation module 120, electromagnetism
Compatible processing module 150 receives AC power frequency voltage, carries out electromagnetic compatibility processing to AC power frequency voltage, makes mutual inductor, mutual inductance
Device test device is in normal course of operation to the electromagnetic interference of place environment generation no more than certain limit value and to place
Electromagnetic interference present in environment has a degree of immunity to interference, the good alternating voltage of output Electro Magnetic Compatibility, wherein electromagnetism
Interference refers to any electromagnet phenomenon that can make equipment or system performance degradation.On the one hand, it is that voltage transformation module 120 provides anti-do
Strong input voltage is disturbed, on the other hand, reducing AC power frequency voltage influences the test performance of transformer test device, to improve
The accuracy of test result.
In one of the embodiments, as shown in Figure 5, Figure 6, transformer test device further includes voltage output module 160,
Voltage output module 160 is serially connected in mutual inductor secondary side circuit, and is configured as testing square wave test voltage or sine wave
Voltage carries out steady pressure treatment.
Specifically, 160 input terminal of voltage output module can connect square wave/sine voltage handover module 140, output termination
Mutual inductor secondary side circuit.Voltage output module 160 carries out steady pressure treatment simultaneously to square wave test voltage or sine wave test voltage
Output provides stable test voltage to secondary side circuit for mutual inductor.Voltage output module 160 is that transformer test device carries
The pressure that is supplied with electric power output port, and stable test voltage is provided for mutual inductor secondary side, further increase test accuracy.It is optional
, the input termination voltage transformation module 120 of voltage output module 160, output termination mutual inductor secondary side circuit, voltage output mould
Block 160 is used to carry out steady pressure treatment to the test voltage that voltage transformation module 120 exports, i.e., voltage output module 160 is to receiving
The test voltage that the voltage transformation module 120 arrived exports carries out steady pressure treatment and exports to secondary side circuit, is provided for mutual inductor
Stable test voltage.
In one of the embodiments, as shown in fig. 6, information acquisition module 130 includes：First information collecting unit 131
With the second information acquisition unit 132；First information collecting unit 131 be used for acquire side loop of mutual inductor voltage signal and
Current signal, the second information acquisition unit 132 are used to acquire the voltage signal and current signal of mutual inductor secondary side circuit.
Specifically, first information collecting unit 131 acquires the voltage signal and current signal of side loop of mutual inductor, together
When, the second information acquisition unit 132 acquires the voltage signal and current signal of mutual inductor secondary side circuit, information acquisition module
130 voltage signals and current signal that collecting unit 131 and the second information acquisition unit 132 acquire according to the first information, obtain
The characterisitic parameter of mutual inductor, such as exciting characteristic curve, electric current no-load voltage ratio, than poor, angular difference.Optionally, first information collecting unit
131 and second communicate to connect between information acquisition unit 132, share the voltage signal and current signal of acquisition between the two, often
A information acquisition unit has independent data-handling capacity, any one information acquisition unit can be according to the primary side of acquisition
Mutual inductor characteristic is obtained with the voltage signal and current signal of secondary side.
In one of the embodiments, as shown in fig. 6, transformer test device further includes message processing module 170, letter
Breath processing module 170 is configured as obtaining and handling the voltage signal of the mutual inductor of the acquisition of information acquisition module 130 and electric current letter
Number.
Specifically, message processing module 170 is connect with information acquisition module 130, message processing module 170 obtains information
The voltage signal and current signal that acquisition module 130 acquires, handle the voltage signal and current signal of acquisition.For example,
No-load voltage ratio calculating, or the electricity from acquisition are carried out to the primary side of the mutual inductor of acquisition, the voltage signal of secondary side and current signal
The exciting current information for extracting mutual inductor in signal and current signal is pressed, the exciting characteristic curve of mutual inductor is obtained.
Optionally, message processing module 170 is configured as the voltage letter of the mutual inductor acquired according to information acquisition module 130
Number and current signal obtain eddy-current loss information.The voltage signal that message processing module 170 is acquired according to information acquisition module 130
And current signal, obtain the eddy-current loss information of mutual inductor.After obtaining eddy-current loss information, transformer test device carries out secondary
Mutual inductor characteristic test excludes to interfere caused by eddy-current loss to improve the accuracy of data.When using square-wave test voltage
When testing exciting characteristic curve, message processing module 170 is configured as measuring external interference, and to parameters such as exciting characteristic curves
It compensates, exciting characteristic curve is made to be more nearly the data obtained under the conditions of power frequency sinusoidal voltage.
Optionally, as shown in fig. 6, message processing module 170 is connect with voltage shift control module 110, information processing mould
Block 170 is configured as the voltage letter that control voltage shift control module 110 acquires the mutual inductor that information acquisition module 130 acquires
Number and current signal.
In order to better illustrate the course of work of transformer test device, transformer test is now illustrated with a specific embodiment
The test process of device, but the present embodiment does not cause to limit to technical solution itself, and this embodiment is intended merely to more clearly
Bright transformer test device.By taking exciting characteristic curve measures as an example, voltage shift control module 110 controls voltage transformation module
120 are converted to AC power frequency voltage the test voltage that duty ratio is 50%, and square wave/sine voltage handover module 140 is by electricity
It is that the square-wave test that duty ratio is 50% is electric to press the control of shift control module 110 to export the test voltage that duty ratio is 50%
Pressure, wherein square-wave test voltage initial voltage are the saturation voltage of mutual inductor, and information acquisition module 130 tests encouraging for the electrical voltage point
Magnetoelectricity stream information tests 8 cycles to saturation voltage point；Then, the voltage value of test voltage is gradually reduced up to 0, and information is adopted
Collection module 130 does excitation characteristic test to each electrical voltage point correspondence respectively, and the test of multiple cycles is carried out to each electrical voltage point, can
Choosing, when the frequency of square-wave test voltage is less than 10Hz, the test of 4 cycles is carried out to each electrical voltage point, to improve test
Efficiency；The voltage signal and current signal that message processing module 170 is acquired according to information acquisition module 130 obtain eddy-current loss letter
Breath excludes eddy-current loss information from voltage signal and current signal；Transformer test device is configured as carrying out mutual inductor
Second of excitation characteristic test；Message processing module 170 is configured as the exciting current letter according to second of excitation characteristic test
Breath and the eddy-current loss information acquisition exciting characteristic curve obtained；Message processing module 170 is configured as measuring extraneous dry
It disturbs, and the exciting characteristic curve of acquisition is compensated according to the external interference of measurement, the exciting characteristic curve after being compensated.
Improve the accuracy of exciting characteristic curve.
In one of the embodiments, as shown in fig. 6, transformer test device further includes power adaptation module 180；
Power adaptation module 180 is configured as being converted to AC power frequency voltage into the work of voltage shift control module 110
Voltage.
The input termination AC power frequency voltage of power adaptation module 180, output termination voltage shift control module 110, power supply
AC power frequency supply is converted to the working power suitable for voltage shift control module 110 by adaptation module 180, is not necessarily to external electricity
Source powers for voltage shift control module 110, greatly reduces the volume of transformer test device, cost-effective, facilitates test.
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But therefore it can not be interpreted as the limitation to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
1. a kind of transformer test device, which is characterized in that including：Voltage shift control module, voltage transformation module and information
Acquisition module；The voltage transformation module is serially connected in mutual inductor secondary side circuit；
The voltage shift control module is configured as controlling the voltage transformation module is converted to difference by AC power frequency voltage
Mutual inductor secondary side circuit test voltage；
Described information acquisition module is configured as the voltage signal and current signal of acquisition mutual inductor.
2. transformer test device according to claim 1, which is characterized in that the voltage transformation module includes：Rectification
Unit, pressure regulation unit and inversion unit；
The rectification unit is configured as AC power frequency voltage commutation being the first DC voltage, and is converted and controlled according to the voltage
First DC voltage is transferred to the pressure regulation unit by the control of molding block；
The pressure regulation unit is configured as first DC voltage being adjusted to the second DC voltage, and is converted according to the voltage
Second DC voltage is transferred to the inversion unit by the control of control module；
The inversion unit is configured as the second DC voltage inversion according to the control of the voltage shift control module
For the test voltage.
3. transformer test device according to claim 1 or 2, which is characterized in that further include that square wave/sine voltage is cut
Change the mold block；The input of the square wave/sine voltage handover module terminates voltage transformation module, and output terminates the secondary of mutual inductor
Side loop；And the square wave/sine voltage handover module is configured as the control according to the voltage shift control module, it will
The test voltage is converted to square-wave test voltage or sine wave test voltage to the secondary side circuit of mutual inductor.
4. transformer test device according to claim 3, which is characterized in that further include electromagnetic compatibility processing module, and
The electromagnetic compatibility processing module is configured as carrying out electromagnetic compatibility processing to AC power frequency voltage and be transferred to the voltage to turn
Change the mold block.
5. transformer test device according to claim 4, which is characterized in that further include voltage output module, the electricity
Pressure output module is serially connected in mutual inductor secondary side circuit, and is configured as to the square-wave test voltage or sine wave test electricity
Pressure carries out steady pressure treatment.
6. transformer test device according to claim 1, which is characterized in that described information acquisition module includes：First
Information acquisition unit and the second information acquisition unit；The first information collecting unit is for acquiring side loop of mutual inductor
Voltage signal and current signal, second information acquisition unit are used to acquire the voltage signal and electricity of mutual inductor secondary side circuit
Flow signal.
7. transformer test device according to claim 1, which is characterized in that further include message processing module, the letter
Breath processing module is configured as obtaining and handling the voltage signal and current signal of the mutual inductor of described information acquisition module acquisition.
8. transformer test device according to claim 1, which is characterized in that further include power adaptation module；
The power adaptation module is configured as being converted to AC power frequency voltage into the work electricity of the voltage shift control module
Pressure.
9. transformer test device according to claim 2, which is characterized in that the rectification unit includes PFC rectified currents
Road；The input of the PFC rectification circuits terminates AC power frequency voltage, output termination voltage transformation module.
10. transformer test device according to claim 2, which is characterized in that the inversion unit includes full-bridge inverting
Circuit；The output end of the input termination pressure regulation unit of the full bridge inverter, the secondary side circuit of output termination mutual inductor.
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| CN201721714298.8U CN207895062U (en) | 2017-12-11 | 2017-12-11 | transformer test device |
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| CN201721714298.8U CN207895062U (en) | 2017-12-11 | 2017-12-11 | transformer test device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133404A (en) * | 2019-05-17 | 2019-08-16 | 国网浙江省电力有限公司宁波供电公司 | Output signal analog device and secondary loading tests system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133404A (en) * | 2019-05-17 | 2019-08-16 | 国网浙江省电力有限公司宁波供电公司 | Output signal analog device and secondary loading tests system |
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