CN207096426U - A kind of two-stage transformer and mutual-inductor tester calibrating installation - Google Patents
A kind of two-stage transformer and mutual-inductor tester calibrating installation Download PDFInfo
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- CN207096426U CN207096426U CN201720386200.4U CN201720386200U CN207096426U CN 207096426 U CN207096426 U CN 207096426U CN 201720386200 U CN201720386200 U CN 201720386200U CN 207096426 U CN207096426 U CN 207096426U
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Abstract
The application provides a kind of two-stage transformer and mutual-inductor tester calibrating installation, calibrating installation provided by the utility model, obtain the voltage signal of detected mutual-inductor tester, current signal, difference voltage signal and difference current signal, the amplitude of four groups of data is sent into the D/A converting circuit of different passages according to phase relation through central execution circuit again, obtain four groups of different analog signalses, then enter different power amplifier sub-circuits and carry out power amplification processing, and it is acquired by sample circuit, result after processing is passed through by isolation boosting device according to amplitude, isolate current lifting device, the processing of two-stage transformer；Range switching sub-circuit can adjust the relay of two-stage transformer, so that two-stage transformer carries out diminution processing according to a certain percentage to difference voltage signal and difference current signal, by difference voltage signal and the control of difference current signal within the required range, the stability and accuracy of mutual-inductor tester calibrating installation output signal can be improved.
Description
Technical field
The application is related to the detection field of mutual-inductor tester calibrating installation, more particularly to a kind of two-stage transformer and mutual inductance
Device tester calibrating installation.
Background technology
Mutual-inductor tester is a kind of multi-functional and two-parameter AC measuring instrument, is mainly used to examine and determine electric power mutual-inductor
And its elementary error of auxiliary device, and the performance about electrical metering equipment can be tested, therefore mutual-inductor tester is electricity
One of indispensable important corollary equipment of Lixing industry, staff periodically must be examined and determine mutual-inductor tester.
Traditional mutual-inductor tester calibrating installation includes pressure regulator, up-flow booster and standard load circuit (or phase shift
Circuit), supply voltage (being typically 220V) is converted to standard signal by pressure regulator and up-flow booster, then through standard termination electricity
Road (or phase-shift circuit) produces difference signal, and obtains difference signal and the ratio of the output signal of verified transformer, judges
Whether mutual-inductor tester is qualified.
But the one turn voltage of pressure regulator is substantially 1V or so, manual adjustment is difficult the required magnitude of voltage accurately adjusted, knot
Fruit causes the difference signal amplitude range that finally exports too big simply close to required magnitude of voltage.Even if accurate regulation is needed for
Magnitude of voltage, it is also unstable.
Utility model content
It is to provide a kind of two-stage transformer and mutual-inductor tester calibrating this application provides the goal of the invention of the present invention
Device is too big with the difference signal amplitude range for solving existing calibrating installation calibrating mutual-inductor tester to cause finally to export.
Even if accurate regulation to required magnitude of voltage, it is also unstable the problem of.
In a first aspect, the application provides a kind of two-stage transformer, applied to mutual-inductor tester calibrating installation, including two-stage
Voltage transformer and two-stage current transformer,
The two-stage voltage transformer includes first order voltage transformer, the first relay and second level voltage transformer；
The first order voltage transformer includes first and fixes winding and the first adjustable winding；
The second level voltage transformer includes second and fixes winding and the second adjustable winding；
The first adjustable winding is connected by first relay with the described second fixation winding；
The two-stage current transformer includes first order current transformer, the second relay and second level current transformer；
The first order current transformer includes the 3rd and fixes winding and the 3rd adjustable winding；
The second level current transformer includes the 4th and fixes winding and the 4th adjustable winding；
The 3rd fixation winding is connected by second relay with the 4th adjustable winding.
Second aspect, present invention also provides a kind of mutual-inductor tester calibrating installation, including central execution circuit, digital-to-analogue
Change-over circuit, power amplifier and sample circuit；
Wherein, the output end of the data processing circuit is connected with an input of the central execution circuit；
The output end of the central execution circuit is connected with the input of the D/A converting circuit；
The output end of the D/A converting circuit is connected with the input of the power amplifier；
The output end of the power amplifier is connected with the input of the sample circuit；
The output end of the sample circuit is connected with another input of the central execution circuit；
The sample circuit includes：Above-mentioned two-stage transformer, several isolation boosting devices, several isolation current lifting devices and several
Partial pressure sample resistance；
Each isolation boosting device is connected with a partial pressure sample resistance respectively；
Each isolation current lifting device is connected with a partial pressure sample resistance respectively；
First fixation winding of the first order voltage transformer of two-stage voltage transformer is connected with the isolation boosting device；
3rd adjustable winding of the first order current transformer of two-stage current transformer is connected with the current lifting device of isolating；
The first relay and the second relay of the two-stage transformer are connected with the D/A converting circuit respectively.
From above technical scheme, the application provides a kind of two-stage transformer and mutual-inductor tester calibrating installation, this
The calibrating installation provided is provided, obtain the voltage signal of detected mutual-inductor tester, current signal, difference voltage signal and
Difference current signal, handle to obtain the amplitude and phase relation of four groups of data by data processing circuit；Performed again through center
Circuit sends the amplitude of four groups of data into the D/A converting circuit of different passages according to phase relation, obtain four groups it is different
Analog signalses, then enter different power amplifier sub-circuits and carry out power amplification processing, and be acquired by sample circuit, root
The result after processing is passed through into isolation boosting device, isolation current lifting device, the processing of two-stage transformer according to amplitude；Range switching sub-circuit can
Adjust the relay of two-stage transformer so that two-stage transformer to difference voltage signal and difference current signal according to a certain percentage
Diminution processing is carried out, to reduce the amplitude of difference voltage signal and difference current signal, by difference voltage signal and difference current
Signal controls within the required range, can improve the stability and accuracy of mutual-inductor tester calibrating installation output signal.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme of the application, letter will be made to the required accompanying drawing used in embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the two-stage current transformer of the application；
Fig. 2 is the circuit theory diagrams of the mutual-inductor tester calibrating installation of the application；
Fig. 3 is the circuit diagram of the mutual-inductor tester calibrating installation of the application.
Wherein, 1- first order current transformer, 11- the 3rd fix winding, the 3rd adjustable windings of 12-, 2- second level electric current
Transformer, 21- the 4th fix winding, the 4th adjustable windings of 22-, the relays of 3- second, 101- man-machine interaction circuits, 1011- controls
Device processed, 1012- display screens, 1013- communication output interfaces 1013,1014- keyboards, 102- data processing circuits, the micro- places of 1021-
Device is managed, 1022- communication input interfaces, 103- centers execution circuit, 1031- centers perform sub-circuit, 1032- memories, 1033-
Sequential digital-to-analogue sub-circuit, 1034- programming device sub-circuits, 104- D/A converting circuits, 1041- digital-to-analogue conversion sub-circuits,
1042- analog-to-digital conversion sub-circuits, 1043- ranges switching sub-circuit, 105- power amplifiers, 1051- power amplifiers sub-circuit 1051,
1052- amplification buffering sub-circuits, 106- sample circuits, 1061- isolation boosting devices, 1062- isolation current lifting devices, 1063- partial pressures take
Sample resistance.
Embodiment
Referring to Fig. 1, a kind of two-stage transformer, applied to mutual-inductor tester calibrating installation, including two-stage voltage transformer
With two-stage current transformer,
The two-stage voltage transformer includes first order voltage transformer, the first relay and second level voltage transformer；
The first order voltage transformer includes first and fixes winding and the first adjustable winding；
The second level voltage transformer includes second and fixes winding and the second adjustable winding；
The first adjustable winding is connected by first relay with the described second fixation winding；
The two-stage current transformer includes first order current transformer 1, the second relay 3 and second level current transformer
2；
The first order current transformer 1 includes the 3rd and fixes 11 and the 3rd adjustable winding 12 of winding；
The second level current transformer 2 includes the 4th and fixes 21 and the 4th adjustable winding 22 of winding；
The 3rd fixation winding 11 is connected by second relay 3 with the described 4th adjustable winding 22.
From above technical scheme, the two-stage transformer of the present embodiment, applied to mutual-inductor tester calibrating installation, mutually
The range switching sub-circuit 1043 of sensor calibrating installation can adjust the first relay and the second relay 3 of two-stage transformer, with
Two-stage transformer is set to carry out diminution processing according to a certain percentage to difference voltage signal and difference current signal, to reduce difference electricity
The amplitude of signal and difference current signal is pressed, by difference voltage signal and the control of difference current signal within the required range, can be with
Improve the stability and accuracy of mutual-inductor tester calibrating installation output signal.
Such as Fig. 2 and Fig. 3, on the other hand the application provides a kind of mutual-inductor tester calibrating installation, including data processing electricity
Road 102, central execution circuit 103, D/A converting circuit 104, power amplifier 105 and sample circuit 106；
Wherein, the output end of the data processing circuit 102 is connected with an input of the central execution circuit 103
Connect；
The output end of the central execution circuit 103 is connected with the input of the D/A converting circuit 104；
The output end of the D/A converting circuit 104 is connected with the input of the power amplifier 105；
The output end of the power amplifier 105 is connected with the input of the sample circuit 106；
The output end of the sample circuit 106 is connected with another input of the central execution circuit 103；
The sample circuit 106 includes：Above-mentioned two-stage transformer, several isolation boosting devices 1061, several isolation up-flows
Device 1062 and several partial pressure sample resistances 1063；
Each isolation boosting device 1061 is connected with a partial pressure sample resistance 1063 respectively；
Each isolation current lifting device 1062 is connected with a partial pressure sample resistance 1063 respectively；
The first of the first order voltage transformer of two-stage voltage transformer fixes winding and the phase of isolation boosting device 1061
Connection；
3rd adjustable winding 12 of the first order current transformer 1 of two-stage current transformer isolates current lifting device 1062 with described
It is connected；
First relay of the two-stage transformer and the second relay 3 are connected with the D/A converting circuit 104 respectively
Connect.
The embodiment of the present application provides mutual-inductor tester calibrating installation, by the electricity for obtaining detected mutual-inductor tester
Signal, current signal, difference voltage signal and difference current signal are pressed, is handled by data processing circuit 102 and obtains this four groups
The amplitude and phase relation of data；The amplitude of four groups of data is sent to not according to phase relation through central execution circuit 103 again
With in the D/A converting circuit 104 of passage, four groups of different analog signalses are obtained, then enter different power amplifiers
105 carry out power amplification processing, and are acquired by sample circuit 106, are risen the result after processing by isolating according to amplitude
Depressor 1061, isolation current lifting device 1062, the processing of two-stage transformer；Data processing circuit 102 is according to preset value with being obtained after processing
Four groups of numerical value verified, negative-feedback detection and adjustment are further carried out, to carry out essence to detected mutual-inductor tester
Quasi- adjustment, judges whether above-mentioned detected value meets the requirement of mutual-inductor tester service precision, to realize mutual-inductor tester
The accuracy of output signal.And range switching sub-circuit 1043 can adjust the first relay and the second relay of two-stage transformer
Device, so that two-stage transformer carries out diminution processing according to a certain percentage to difference voltage signal and difference current signal, to reduce
The amplitude of difference voltage signal and difference current signal, by difference voltage signal and the control of difference current signal in required scope
It is interior, the stability and accuracy of mutual-inductor tester calibrating installation output signal can be improved.
The calibrating installation that the embodiment of the present application provides using on circuit it is separate by digital-to-analogue conversion sub-circuit 1041,
Four paths that power amplifier sub-circuit 1051, isolation boosting device 1061 or isolation current lifting device 1062 and two-stage transformer are formed, often
The amplitude between passage and phase relation are handled using microprocessor 1021 all the way and center performs sub-circuit 1031
Automatically control output；By difference voltage signal and difference current signal amplitude scope control in smaller range, it can improve mutually
The stability and accuracy of sensor tester calibrating installation output signal.
Specifically, centre execution circuit includes：Center performs sub-circuit 1031, sequential digital-to-analogue sub-circuit 1033, memory
1032 and programming device sub-circuit 1034；
The center performs sub-circuit 1031 and is connected with the microprocessor 1021.
The memory 1032 is used to store four groups of data and the output result；
The programming device sub-circuit 1034 is used to carry out automatic computing according to the amplitude, obtains the automatic computing
Result；
The sequential digital-to-analogue sub-circuit 1033 is used to provide for the central execution circuit 103 and D/A converting circuit 104
Sequential relationship.
Central execution circuit 103 carries out automatic computing according to the amplitude that microprocessor 1021 is calculated to four groups of data,
And the sequential of the result of automatic computing as requested is sent to digital-to-analogue according to the phase relation of each group of data list signal and turned
Change in circuit 104.Programming device sub-circuit 1034 in central execution circuit 103 provided in an embodiment of the present invention, use
FPGA (Field-Programmable Gate Array), i.e. field programmable gate array.It is in PAL, GAL, CPLD etc.
The product further developed on the basis of programming device.It is as a kind of semidefinite in application specific integrated circuit (ASIC) field
Circuit processed and occur, both solved the deficiency of custom circuit, overcome again original programming device gate circuit number it is limited lack
Point.Circuit design is flexible, and modification is convenient, and integrated level is high, strong antijamming capability.Calibrating installation provided by the invention uses
ALTERA-EP1K30QC208-3N, possess 30000 gate circuits, reach 1728 macroelement numbers, 80MHz frequencies, monolithic can is complete
It is reliable and stable into all digital logical operations.
The center that the present embodiment provides performs starting sequential point of the sub-circuit 1031 using CPLD to each road digital-to-analogue conversion
Do not control, each cycle has 32768 time sequential pulses, it is possible to achieve the resolution ratio of a cycle phase shift reach 360 °/
32768, as 0.011 ° or 0.66 '.The concept for being converted to radian is then 0.0192%, and far smaller than mutual-inductor tester 7 is examined
Device is determined than difference and the irrelevance 0.2% of angular difference.Method to data signal phase shift is realized with this, phase shift resolution ratio is very high,
Therefore in the absence of the inaccurate possibility of phase shift.
Therefore, central execution circuit 103 provided in an embodiment of the present invention and microprocessor 1021 can realize it is more from
Dynamicization function.
Further, the D/A converting circuit 104 is used to the result of the automatic computing being converted into analog signalses, and
The analog signalses are sent to the power amplifier 105；The analog signalses include voltage analog signal, current-mode
Analog quantity signal, difference voltage analog signalses and difference current analog signalses.
D/A converting circuit 104 passes through automatic computing according to the sequential relationship of sequential digital-to-analogue sub-circuit 1033 to four groups of data
Result afterwards carries out conversion process, obtains analog signalses, respectively voltage analog signal, current-mode analog quantity signal difference electricity
Press analog signalses and difference current analog signalses.
Specifically, the D/A converting circuit 104 includes：Digital-to-analogue conversion sub-circuit 1041, analog-to-digital conversion sub-circuit 1042
Switch sub-circuit 1043 with range；
The input of the digital-to-analogue conversion sub-circuit 1041, the output end of the analog-to-digital conversion sub-circuit 1042 and the amount
Output end of the input of journey switching sub-circuit 1043 respectively with the central execution circuit 103 is connected；
The input of the output end of the digital-to-analogue conversion sub-circuit 1041 and the analog-to-digital conversion sub-circuit 1042 respectively with
One power amplifier 105 is connected；
The output end input with the power amplifier 105 and the sampling respectively of the range switching sub-circuit 1043
The input of circuit 106 is connected；
The digital-to-analogue conversion sub-circuit 1041 is converted into simulating in by the result of the central 103 automatic computing of execution circuit
Measure signal；
The analog-to-digital conversion sub-circuit 1042 is used to adopt described in after the amplifier buffered of power amplifier 105
The output result of sample circuit 106 measures, and sends to the central execution circuit 103；
Range switching sub-circuit 1043 is used to send control signal, by adjust automatically switching range, described in control
Power amplifier 1055 and the sample circuit 106 are according to the switching range output result.
Wherein, digital-to-analogue conversion sub-circuit 1041 has four passages, respectively to voltage signal, current signal, difference voltage
Signal and difference current signal are changed, and obtain voltage analog signal, current-mode analog quantity signal, difference voltage analog quantity
Signal and difference current analog signalses, digital-to-analogue conversion sub-circuit 1041 carry out conversion to each signal and independently carried out, often
The signal conversion process of one passage is not interfere with each other.
Digital-to-analogue conversion sub-circuit 1041 is provided in the present embodiment, using the ripe chip DAC7744 of AD companies, the chip can
Realize 16 high precision electro press-moulding die analog quantity outputs, fineness adjustment 1:32768, and four tunnel signal outputs, just it is adapted to this
The demand of four tunnel signal sources of the calibrating installation provided is provided.The digital-to-analogue conversion sub-circuit 1041 is the numeral conversion of high-precision degree type
Device.
Range switching sub-circuit 1043 can adjust automatically range scope, the range of control amplification buffering sub-circuit 1052
Adjustable range, the adjustable range of control isolation boosting device 1061 and isolation current lifting device 1062, also controllable two-stage voltage transformer
With the adjustable range of two-stage current transformer, due to the circuit irrelevance of four groups of data so that any signal conversion mistake
Cheng Zhong, the range of each device is in optimal output range, and during output range that the range of each device is optimal, i.e.,
The accurate calibrating to mutual-inductor tester can be achieved.
Further, the power amplifier 105 includes：Several power amplifier sub-circuits 1051 and several amplification buffering sub-circuits
1052；
Each power amplifier sub-circuit 1051 is connected with the digital-to-analogue conversion sub-circuit 1041 respectively；Each amplification
One end of buffering sub-circuit 1052 is respectively connected with the analog-to-digital conversion sub-circuit 1042, each amplification buffer sublayer electricity
The other end on road 1052 is respectively connected with range switching sub-circuit 1043.
The power amplifier sub-circuit 1051 is used to the analog signalses carrying out power amplification processing, and sends and adopted to described
Sample circuit 106；
The amplification buffering sub-circuit 1052 is used for the control signal for receiving the range switching sub-circuit 1043, by cutting
Change range and obtain output signal, and the output signal is sent to the analog-to-digital conversion sub-circuit 1042.
In the present embodiment, power amplifier sub-circuit 1051 is four, and amplification buffering sub-circuit 1052 is four, the power amplifier of each
Sub-circuit 1051 and amplification buffering sub-circuit 1052 are respectively corresponding with one group of data list signal, and formation is independent, does not do mutually
The power amplifier passage disturbed.
Each group of analog signalses carry out power amplification processing, i.e. voltage analog by a power amplifier sub-circuit 1051 respectively
Signal, current-mode analog quantity signal, difference voltage analog signalses and difference current analog signalses correspond to power amplifier respectively
Circuit 1051, each analog signalses are respectively sent to sample circuit 106 after power amplification.
Further, described device also includes man-machine interaction circuit 101, the output end of the man-machine interaction circuit 101 and institute
The input for stating data processing circuit 102 is connected；
The data processing circuit 102 includes：Microprocessor 1021 and the communication being connected with the microprocessor 1021
Input interface 1022, the microprocessor 1021 are connected with the man-machine interaction circuit 101.
The microprocessor 1021 is used to obtain four groups of data, and handled to obtain the amplitudes of four groups of numbers with
Phase relation；
The microprocessor 1021 is additionally operable to control the separately adjustable amplitude of the central execution circuit 103 and the phase
Position relation, is verified according to preset value, is carried out negative-feedback adjustment to the output result, is obtained standard output result；
The communication input interface 1022 is used to transmit between the microprocessor 1021 and the man-machine interaction circuit 101
Four groups of data list signals.
Four groups of data list signals that man-machine interaction circuit 101 obtains are connect by the communication input of data processing circuit 102
Mouth 1022 is transmitted into microprocessor 1021, and microprocessor 1021 carries out that four groups of numbers are calculated to four groups of data list signals
According to amplitude and phase relation, i.e., the width of voltage signal, current signal, difference voltage signal and difference current signal is calculated respectively
Value and phase relation.
Further, the man-machine interaction circuit 101 includes：Controller 1011, keyboard 1014, display screen 1012 and communication are defeated
Outgoing interface 1013；The keyboard 1014, display screen 1012 and communication output interface 1013 respectively with the controller 1011 one
End is connected, and the other end of the controller 1011 is connected with the microprocessor 1021.
The display screen 1012, for showing the output result and standard output result；The output result includes inspection
Survey magnitude of voltage, detection current value, detection difference voltage value and detection difference current value；The standard output result includes standard electric
Pressure value, standard current value, standard deviation magnitude of voltage and standard deviation current value；
The communication output interface, it is defeated for being connected with the communication input interface 1022 of the data processing circuit 102
Go out four groups of data list signals；
The keyboard 1014, for input instruction；
The controller 1011, for controlling the display screen 1012 to be shown, controlling the communication output interface defeated
Go out signal and receive the instruction that the keyboard 1014 inputs.
From above technical scheme, the application provides a kind of two-stage transformer and mutual-inductor tester calibrating installation, this
The calibrating installation provided is provided, obtain the voltage signal of detected mutual-inductor tester, current signal, difference voltage signal and
Difference current signal, handled by data processing circuit 102 and obtain the amplitude and phase relation of four groups of data；Held again through center
Row circuit 103 sends the amplitude of four groups of data into the D/A converting circuit 104 of different passages according to phase relation, obtains
Four groups of different analog signalses, then enter different power amplifier sub-circuits 1051 and carry out power amplification processing, and by sampling
Circuit 106 is acquired, and the result after processing is passed through into isolation boosting device 1061, isolation current lifting device 1062, two-stage according to amplitude
Transformer processing；Range switching sub-circuit 1043 can adjust the first relay and the second relay of two-stage transformer, so that two
Level transformer carries out diminution processing according to a certain percentage to difference voltage signal and difference current signal, to reduce difference voltage letter
Number and difference current signal amplitude, by difference voltage signal and difference current signal control within the required range, can improve
The stability and accuracy of mutual-inductor tester calibrating installation output signal.
Claims (7)
1. a kind of two-stage transformer, applied to mutual-inductor tester calibrating installation, it is characterised in that including two-stage voltage transformer
With two-stage current transformer,
The two-stage voltage transformer includes first order voltage transformer, the first relay and second level voltage transformer；
The first order voltage transformer includes first and fixes winding and the first adjustable winding；
The second level voltage transformer includes second and fixes winding and the second adjustable winding；
The first adjustable winding is connected by first relay with the described second fixation winding；
The two-stage current transformer includes first order current transformer, the second relay and second level current transformer；
The first order current transformer includes the 3rd and fixes winding and the 3rd adjustable winding；
The second level current transformer includes the 4th and fixes winding and the 4th adjustable winding；
The 3rd fixation winding is connected by second relay with the 4th adjustable winding.
2. a kind of mutual-inductor tester calibrating installation, it is characterised in that including central execution circuit, D/A converting circuit, power amplifier
Circuit, data processing circuit and sample circuit；
Wherein, the output end of the data processing circuit is connected with an input of the central execution circuit；
The output end of the central execution circuit is connected with the input of the D/A converting circuit；
The output end of the D/A converting circuit is connected with the power amplifier input；
The output end of the power amplifier is connected with the input of the sample circuit；
The output end of the sample circuit is connected with another input of the central execution circuit；
The sample circuit includes：Two-stage transformer, several isolation boosting devices, several isolation up-flows as claimed in claim 1
Device and several partial pressure sample resistances；
Each isolation boosting device is connected with a partial pressure sample resistance respectively；
Each isolation current lifting device is connected with a partial pressure sample resistance respectively；
First fixation winding of the first order voltage transformer of two-stage voltage transformer is connected with the isolation boosting device；
3rd adjustable winding of the first order current transformer of two-stage current transformer is connected with the current lifting device of isolating；
The first relay and the second relay of the two-stage transformer are connected with the D/A converting circuit respectively.
3. mutual-inductor tester calibrating installation as claimed in claim 2, it is characterised in that the central execution circuit includes：
Center performs sub-circuit, sequential digital-to-analogue sub-circuit, memory, microprocessor and programming device sub-circuit；
The center performs sub-circuit and is connected with the microprocessor.
4. mutual-inductor tester calibrating installation as claimed in claim 2, it is characterised in that the D/A converting circuit includes number
Mould conversion sub-circuit, analog-to-digital conversion sub-circuit and range switching sub-circuit；
The input of the digital-to-analogue conversion sub-circuit, the output end of the analog-to-digital conversion sub-circuit and range switching sub-circuit
Output end of the input respectively with the central execution circuit be connected；
The input of the output end of the digital-to-analogue conversion sub-circuit and the analog-to-digital conversion sub-circuit is electric with a power amplifier respectively
Road is connected；
The output end input with the input and the sample circuit of the power amplifier respectively of the range switching sub-circuit
End is connected.
5. mutual-inductor tester calibrating installation as claimed in claim 4, it is characterised in that the power amplifier includes：It is several
The several amplification buffering sub-circuits of power amplifier sub-circuit；
Each power amplifier sub-circuit is connected with the digital-to-analogue conversion sub-circuit respectively；Each amplification buffering sub-circuit
One end is respectively connected with the analog-to-digital conversion sub-circuit, the other end of each amplification buffering sub-circuit respectively with institute
Range switching sub-circuit is stated to be connected.
6. mutual-inductor tester calibrating installation as claimed in claim 3, it is characterised in that described device also includes man-machine interaction electricity
Road, the output end of the man-machine interaction circuit are connected with the input of the data processing circuit；
The data processing circuit includes the communication input interface that is connected with the microprocessor, the microprocessor with it is described
Man-machine interaction circuit is connected.
7. mutual-inductor tester calibrating installation as claimed in claim 6, it is characterised in that the man-machine interaction circuit includes：Control
Device, keyboard, display screen and communication output interface processed；The keyboard, display screen and communication output interface respectively with the controller
One end be connected, the other end of the controller is connected with the microprocessor.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108414960A (en) * | 2018-04-13 | 2018-08-17 | 南京丹迪克电力仪表有限公司 | A kind of multichannel directly measures formula mutual-inductor tester and method of calibration |
| CN108776245A (en) * | 2018-04-09 | 2018-11-09 | 国网四川省电力公司电力科学研究院 | It is a kind of can a variety of principle mutual-inductor testers of automatic calibration calibrating installation |
| CN111123101A (en) * | 2019-12-23 | 2020-05-08 | 杭州电子科技大学 | High-frequency detection and sampling system for testing generator set |
| CN113030622A (en) * | 2021-03-18 | 2021-06-25 | 国网浙江省电力有限公司营销服务中心 | Self-calibration-based automatic testing device for comprehensive characteristics of mutual inductor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108776245A (en) * | 2018-04-09 | 2018-11-09 | 国网四川省电力公司电力科学研究院 | It is a kind of can a variety of principle mutual-inductor testers of automatic calibration calibrating installation |
| CN108776245B (en) * | 2018-04-09 | 2024-01-23 | 国网四川省电力公司电力科学研究院 | Calibrating device capable of automatically calibrating transformer calibrator with multiple principles |
| CN108414960A (en) * | 2018-04-13 | 2018-08-17 | 南京丹迪克电力仪表有限公司 | A kind of multichannel directly measures formula mutual-inductor tester and method of calibration |
| CN111123101A (en) * | 2019-12-23 | 2020-05-08 | 杭州电子科技大学 | High-frequency detection and sampling system for testing generator set |
| CN111123101B (en) * | 2019-12-23 | 2022-01-04 | 杭州电子科技大学 | High-frequency detection and sampling system for testing generator set |
| CN113030622A (en) * | 2021-03-18 | 2021-06-25 | 国网浙江省电力有限公司营销服务中心 | Self-calibration-based automatic testing device for comprehensive characteristics of mutual inductor |
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