CN105334404B - Artificial mains network - Google Patents
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- CN105334404B CN105334404B CN201410258134.3A CN201410258134A CN105334404B CN 105334404 B CN105334404 B CN 105334404B CN 201410258134 A CN201410258134 A CN 201410258134A CN 105334404 B CN105334404 B CN 105334404B
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Abstract
The present invention relates to a kind of artificial mains networks.In one example, which includes：Interference measurement module, the interference signal for receiving equipment under test, and disturbance measuring signal is exported by different measurement patterns, it is measured for measuring apparatus；And control module, the measurement pattern for controlling interference measurement module.For example, the measurement pattern of interference measurement module may include L line interference measurements, N line interference measurements, DM EMI measures and common mode interference measures.According to the present invention, so that artificial mains network has DM EMI separation function altogether, can both ensure the performance characteristics of artificial mains network, it is ensured that Conduction Interference measurement result it is reliable, interference type can be provided when Conduction Interference is analyzed in rectification for designer again, to assist rectification analysis.
Description
Technical field
This invention relates generally to artificial mains networks, more specifically, are related to a kind of carry and are total to differential mode separation function
Artificial mains network.
Background technology
With Modern technological progress, the demand to electronic product is more and more diversified.To ensure multiclass electronic product same
Operation is worked together in one environment, the electromagnetic compatibility problem of electronic product is more and more prominent.Currently, most electronic products exist
It needs to do it electromagnetic compatibility measurement certification before listing.Conduction Interference transmitting is the main measure the item of electromagnetic compatibility.Right
Electronic product carries out being frequently encountered the case where transmitted value is beyond respective specified limit value when Conduction Interference emission measurement, in this situation
Under, designer just needs to carry out rectification analysis to product.
Currently, there are mainly three types of the methods of Conduction Interference rectification analysis, the first：Empirical method, designer is according to previous
The experience for solving the problems, such as Conduction Interference works out some to product and attempts countermeasure, passes through trial, the side for measuring, reattempting, measuring again
Method solves the problems, such as Conduction Interference, and this method has cost-effective advantage, but many times take it is very long, and completely according to
Rely the experience of designer；Second：By filter method, designer increases a filter on product, then measures sight
Improvement situation is examined, this method, which has, easily to be implemented, and the advantage that device cost is cheap, but the filtering characteristic of filter typically exists
It is obtained under 50 Ω measuring systems, and the impedance of different product is had nothing in common with each other, and is many times increased filter and is unable to get expection
Improvement；The third:Using total differential mode separation equipment, the program is having ripe common mode differential mode separation equipment on the market, and can
To quantify survey data, designer can obtain interference type according to measurement result, further according to interference type (common mode or difference
Mould) take corresponding measure, however the implementation of the program needs two artificial mains networks (AMN), testing cost to increase,
The use of differential mode separation equipment may cause the overall impedance of electric power network to deviate altogether simultaneously, bring measurement error.
Invention content
The brief overview about the present invention is given below, in order to provide the basic reason about certain aspects of the invention
Solution.It should be appreciated that this general introduction is not the exhaustive general introduction about the present invention.It is not intended to determine the key of the present invention
Or pith, nor is it intended to limit the scope of the present invention.Its purpose only provides certain concepts in simplified form, with
This is as the preamble in greater detail discussed later.
According to an aspect of the present invention, a kind of artificial mains network is proposed, including：Interference measurement module, for receiving
The interference signal of equipment under test, and disturbance measuring signal is exported by different measurement patterns, it is measured for measuring apparatus；And control
Molding block, the measurement pattern for controlling interference measurement module.For example, the measurement pattern of interference measurement module may include L lines
Interference measurement, N line interference measurements, DM EMI measures and common mode interference measures.
According to the present invention so that artificial mains network has DM EMI separation function altogether, can both ensure artificial power supply
The performance characteristics of network, it is ensured that Conduction Interference measurement result it is reliable, and can be designer rectification analyze Conduction Interference
When interference type is provided, with assist rectification analysis.
Description of the drawings
Below with reference to the accompanying drawings illustrate embodiments of the invention, the above of the present invention and its can be more readily understood that
Its objects, features and advantages.Component in attached drawing is intended merely to show the principle of the present invention.In the accompanying drawings, identical or similar
Technical characteristic or component will be indicated using same or similar reference numeral.
Fig. 1 is the structure chart according to the artificial mains network of one embodiment of the present invention；
Fig. 2 is an exemplary structure chart of the pre-processing module of artificial mains network shown in Fig. 1；
Fig. 3 is an exemplary circuit diagram of decoupling module shown in Fig. 2；
Fig. 4 is an exemplary circuit diagram of coupling module shown in Fig. 2；
Fig. 5 is an exemplary structure chart of the interference measurement module of artificial mains network shown in Fig. 1；
Fig. 6 is an exemplary circuit diagram of interference measurement module shown in Fig. 5；
Fig. 7 shows to constitute pre-processing module shown in Fig. 1 in artificial mains network, interference measurement module and output module
A kind of circuit diagram of exemplary circuit configuration；
Fig. 8 shows to constitute the exemplary block diagram of the control module in artificial mains network shown in Fig. 1；
Fig. 9 shows an exemplary circuit diagram of the panel control unit in control module shown in Fig. 8；
Figure 10 shows an exemplary circuit diagram of the control signal generation unit in control module shown in Fig. 8；
Figure 11 shows to constitute a kind of circuit of exemplary circuit configuration of the display module in artificial mains network shown in Fig. 1
Figure；And
Figure 12 shows the exemplary electrical of the overall system control of the artificial mains network according to one embodiment of the present invention
Lu Tu, which includes exemplary panel control unit shown in Fig. 9, exemplary control signal generation unit shown in Fig. 10 and
Exemplary display module shown in Figure 11.
Specific implementation mode
Illustrate the embodiment of the present invention with reference to the accompanying drawings.It is retouched in the attached drawing of the present invention or a kind of embodiment
The elements and features stated can be combined with elements and features shown in one or more other attached drawings or embodiment.It answers
When note that for purposes of clarity, being omitted known to unrelated to the invention, those of ordinary skill in the art in attached drawing and explanation
Component and processing expression and description.
It is shown in Figure 1, for according to the structure chart of the artificial mains network 1 of one embodiment of the present invention.
In the present embodiment, artificial mains network 1 is for example including pre-processing module 10, interference measurement module 20, output
Module 30, control module 40 and display module 50.In addition, external AC power grid and equipment under test (EUT) is also shown in Fig. 1.
Wherein, pre-processing module 10 for reducing external AC power grid interference, and by the interference signal coupling of equipment under test EUT
Close next stage.Interference measurement module 20 has disturbance measurement pattern, and variety classes interference signal can be selected to be surveyed
Amount, such as L line-hits, N line-hits, common mode interference and DM EMI can be measured.Output module 30 will be for that will interfere survey
Amount module 20 measures obtained interference signal output.Control module 40 is used to control interference measurement module 20 and is surveyed in different interference
Switch between amount pattern.It is described more detail above, control module 40 can be by button or switch manual manipulation, can also be remote
Journey obtains control signal.Display module 50 shows that equipment comes 20 institute of display interference measurement module for example, by bright light or display screen etc.
Locate operating mode, that is, L line interference measurements pattern, N line interference measurements pattern, common mode interference measurement pattern or DM EMI measure
Pattern.
Referring to Fig. 2, an exemplary structure chart of the pre-processing module 10 of artificial mains network 1 shown in Fig. 1 is shown.
In one embodiment, pre-processing module 10 may include decoupling module 11 and coupling module 12.From the point of view of citing, solution
Coupling module 11 and the exemplary circuit diagram of coupling module 12 difference are as shown in Figure 3 and Figure 4.It should be appreciated by those skilled in the art that
All circuit diagrams shown in this specification are all for illustrative purposes, to provide only a kind of exemplary realization side of corresponding module
Formula, it can be envisaged that other equivalent circuits can also be used for realizing the function of corresponding module.
In conjunction with Fig. 2-4, the work for understanding the pre-processing module 10 in artificial mains network 1 according to the present invention can be become apparent from
Make principle.Decoupling module 11 is used to access electric power signal from external AC power grid, and reduces the electromagnetic interference of external power signal.Coupling
Molding block 12 is used to be isolated the electric power signal of external AC power grid, and the interference signal of equipment under test EUT is coupled to next stage.Example
Such as, the interference in AC power grid 150kHz-30MHz frequency ranges can be reduced 40dB or more by decoupling module 11, make AC power grids 150kHz-
Interference in 30MHz frequency ranges is far smaller than the interference that the input electrical signal of equipment under test generates, to ensure artificial mains network
The interference signal measured is that input electrical signal of equipment under test itself is sent out.
Fig. 3 is an exemplary circuit diagram of decoupling module 11 shown in Fig. 2.
In figure 3, one end of decoupling module is connected to the input of AC power grids, including firewire (L) zero curve (N) ground wire (PE)
Three lines, be connected to the corresponding L of power grid N tri- lines of PE.The other end of decoupling module is the ports EUT, connection equipment under test EUT
Input electrical signal, including firewire (EUT-L) zero curve (EUT-N) three lines of ground wire (EUT-PE), be connected respectively to tested set
The standby corresponding L of EUT N tri- lines of PE.
Fig. 4 is an exemplary circuit diagram of coupling module 12 shown in Fig. 2.
In Fig. 4, the interference signal of equipment under test EUT is coupled to next stage circuit by termination power, while by 50Hz's
Power-frequency voltage signal isolation.One end ports connection EUT of the termination power, that is, tri- lines of EUT-L, EUT-N and EUT-PE, separately
The equipment under test interference signal being coupled out is exported and is handled to next stage circuit by one end.As shown, " Output_L "
It is the interference signal of coupling output " EUT-L " line, " Output_N " is the interference signal of coupling output " EUT-N " line.
Next, interference measurement module 20 included in artificial mains network 1 will be described.Fig. 5 shows artificial power net
One exemplary structure chart of the interference measurement module 20 of network 1.As shown, in this example, interference measurement module 20 includes
DM EMI extraction unit 25 and four switches S121, S222, S323 and S424 altogether.Total DM EMI extraction unit 25 is used for will
The common mode component CM and differential-mode component DM separation and Extractions of EUT-L lines and the interference signal on EUT-N lines come out, and will be total to as needed
Mold component or differential-mode component are output to measuring apparatus, to obtain common mode interference readings or DM EMI readings.Switch S1, S2, S3
The control signal from control module 40 is received with S4, and the different interference measurement pattern of selection that cooperates, by variety classes
Interference signal (interference of L lines, the interference of N lines, common mode interference or DM EMI) is output to measuring apparatus.
Fig. 6 shows a kind of exemplary circuit diagram of interference measurement module 20 shown in Fig. 5.
In circuit shown in Fig. 6, EUT-L line interference signals Output_L and EUT-N from prime pre-processing module 10
Line interference signal Output_N is input to switch S1.Switch S1, S2 and S4 constitute " L/N lines interfere transmission circuit ", for passing through
EUT-L lines interference signal or EUT-N line interference signals are coupled to rear class output by the different on off operating modes of switch S1, S2 and S4
Module 30, so that measuring apparatus measures and reads.One exemplary circuit of output module 30 will be for subsequent reference chart 7
It is bright.
In addition, as shown in fig. 6, in one example, DM EMI extraction unit 25 can include following assemblies altogether：Common mode
Separator CM Splitter, differential mode separator DM Splitter, resistance R18 and R19.It should be appreciated that differential mode is dry altogether shown in Fig. 6
The circuit composition for disturbing extraction unit 25 is merely possible to example, and those skilled in the art are contemplated that other circuits form, are used for
Common mode component CM and differential-mode component DM are separated and extracted from the interference signal on EUT-L lines and EUT-N lines.Therefore, total differential mode
Interference extraction unit 25 combines composition " common mode/differential mode interference transmission circuit " with switch S1, S3 and S4, they cooperate, with
Common mode interference CM or DM EMI DM are output to rear class output module 30, so that measuring apparatus measures and reads.
First, on " L/N lines interfere transmission circuit ", by set aside switch S1, EUT-L line interference signal Output_L with
EUT-N line interference signals Output_N is coupled as " TEST_L " and " TEST_N ", and the combinative movement for then passing through S2 and S4 is defeated
Go out the output module 30 to rear class, so that measuring apparatus measures and reads.As shown in fig. 7, L lines circuit and N line circuits
The receiver " Receiver " of 50 Ω impedances is wherein chosen to measure and read all the way, another way then can only choose 50 Ω to fix
The terminal of impedance R6.As shown in fig. 6, " OP2+ ", " OP2- " is to be directed to switch S2 from control module 40 (being described below)
Control signal, " OP4+ ", " OP4- " is the control signal for switch S4 from control module 40.As " OP2+ ",
When the voltage difference of " OP2- " is 0V, S2 is set aside；" OP4+ ", when the voltage difference of " OP4- " is 0V, S4 is set aside, and L line circuits are selected,
Interference signal on " TEST_L " is output to as output signal REC on the receiver " Receiver " of 50 Ω impedances, finally quilt
It reads, the interference signal on " TEST_N " is then connected to as output TER on the terminal resistance R6 of 50 Ω.On the other hand, when
The voltage difference of " OP2+ ", " OP2- " are+5V, are dialled on S2；" OP4+ ", when the voltage difference of " OP4- " is 0V, S4 is set aside, N line circuits
Selected, the interference signal on " TEST_N " is output to as output signal REC on the receiver " Receiver " of 50 Ω impedances,
Finally read；Interference signal on " TEST_L " is connected to as output TER on the terminal resistance R6 of 50 Ω.
On " common mode/differential mode interference transmission circuit ", as it can be seen in figures 5 and 6, S1 is closed by above pushing aside, EUT-L lines interference letter
Number Output_L and EUT-N line interference signals Output_N is coupled as " SEL_L " and " SEL_N ".Then, through common mode separator
CM Splitter obtain the common mode component of interference signal, and obtain the differential mode of interference signal through differential mode separator DM Splitter
Component." OP3+ ", " OP3 "-are the control signals for switch S3 from control module 40, and " OP4+ ", " OP4- " is to come from
The control signal for switch S4 of control module 40.As " OP3+ ", when the voltage difference of " OP3 " is 0V, S3 is set aside；"OP4+",
It when the voltage difference of " OP4- " is+5V, is dialled on S4, common mode pattern is selected, and common mode interference component " CM " is used as output signal REC quilts
It is output on the receiver " Receiver " of 50 Ω impedances, common mode component is read, and DM EMI component " DM " is as output
TER is output on the resistance R6 of 50 Ω impedances.On the other hand, it as " OP3+ ", when the voltage difference of " OP3 " is+5V, is dialled on S3；
" OP4+ " when the voltage difference of " OP4- " is+5V, is dialled on S4, and differential mode pattern is selected, and DM EMI component " DM " is output to 50
On the receiver " Receiver " of Ω impedances, differential-mode component is read, and common mode interference component " CM " is output to the end of 50 Ω
It holds on resistance R6.
In circuit shown in Fig. 6, common mode separator CM_Splitter is used to isolate the common mode component of interference signal,
In the frequency range of 150kHz~30MHz, insertion loss is less than 1dB, and common mode differential mode rejection ratio is more than 20dB；Differential mode separator
DM_Splitter isolates the differential-mode component of interference signal, and in the frequency unit of 150kHz~30MHz, insertion loss is less than
1dB, differential mode common-mode rejection ratio are more than 20dB.
" L/N lines interfere transmission circuit " is combined and seen with " common mode/differential mode interference transmission circuit ", four double-poles are passed through
The combinative movement of commutator S1, S2, S3 and S4 realize the selection of different test patterns on circuit, to realize equipment under test
The interference signal of EUT is output to measuring apparatus by selected test pattern.As described above, " Output_L ", " Output_N "
It is the EUT-L lines interference signal and EUT-N line interference signals that the coupling module 12 from prime exports.By coming from control module
40 control signal " OPX+ ", " OPX- " (X 1,2,3,4) control switch S1, S2, S3, S4 combinative movement select difference
Interference measurement pattern.Specifically, when the voltage difference between OPX+ ", " OPX- " is+5V, dialled in respective switch, voltage difference
For 0V when, respective switch is set aside.Therefore, when being dialled on S1, S2, S3, when S4 is set aside, the interference of L lines is selected, on " TEST_L "
Interference signal is output on the receiver " Receiver " of 50 Ω impedances, is finally read, and the interference letter on " TEST_N "
It number is connected on the terminal resistance R6 of 50 Ω；Work as S1, S2, S3 are upper to be dialled, and when S4 is set aside, N circuits are selected, on " TEST_N "
Interference signal be output on the receiver " Receiver " of 50 Ω impedances, finally read, and the interference on " TEST_L "
Signal is connected on the middle terminal resistance R6 of 50 Ω.Working as S1, S2, S3 is set aside, and when being dialled on S4, common mode line is selected,
Interference signal on " CM " is output on the receiver " Receiver " of 50 Ω impedances, is finally read, and dry on " DM "
Signal is disturbed to be connected on the middle terminal resistance R6 of 50 Ω；When S1 is set aside, S2, S3, when S4 is above dialled, differential mode line is selected,
Interference signal on " DM " is output on the receiver " Receiver " of 50 Ω impedances, is finally read, and dry on " CM "
Signal is disturbed to be connected on the middle terminal resistance R6 of 50 Ω.Referring specifically to Fig. 6.
The exemplary electrical of the interference measurement module of artificial mains network according to the present invention is described above with reference to Figures 5 and 6
Line structure and operation principle.In order to be more convenient for understanding, Fig. 7 show on the whole pre-processing module 10 in artificial mains network 1,
The circuit diagram of interference measurement module 20 and the exemplary circuit configuration of output module 30.The circuit diagram is merely exemplary, rather than
Limit the scope of the invention, those skilled in the art be easy imagine other circuit implementations, for realizing pre-processing module 10,
The function of interference measurement module 20 and output module 30.
The control system portion of artificial mains network 1 according to the ... of the embodiment of the present invention is described below with reference to Fig. 8,9,10
Point, that is, control module 40 and display module 50.
Fig. 8 shows the exemplary block diagram of control module 40, which includes panel control unit 41 and control
Signal generation unit 42.Fig. 9 shows that the exemplary circuit diagram of panel control unit 41, Figure 10 show control signal generation unit 42
Exemplary circuit diagram.
As shown in figure 9, in one example, the circuit of panel control unit 41 is as schemed.In this example, panel, which controls, is
Interference measurement model selection is controlled by the panel button on artificial mains network.Four buttons " N_Local " on panel,
" L_Local ", " CM_Local ", " DM_Local " correspond to L line interference measurements pattern, N line interference measurements pattern, common mode point respectively
Measurement pattern and differential-mode component measurement pattern.When pressing " N_Local " button, N interference measurement patterns are selected, other are pressed
When button is pressed, corresponding measurement pattern is selected.Under normal operation, only a button is allowed to be pressed.In addition, on panel
Further include a knob control S6, for selecting input pattern.When knob S6 is left-handed, it is in panel control model；Work as knob
When S6 dextrorotation, it is in distance control mode.
The exemplary circuit diagram of control signal generation unit 42 is shown in FIG. 10.In this example, four road decks control
The input signal of button " N_Local ", " L_Local ", " CM_Local ", " DM_Local ", the electricity of four great distance process controls selection
Ordinary mail number " N_REMOTE ", " L_REMOTE ", " CM_REMOTE ", " DM_REMOTE " and control model selection signal
" Select_control " as input, by controlling the processing of signal generation unit 42, export four groups of voltages " OP1+,
OP1- ", " OP2+, OP2- ", " OP3+, OP3- ", " OP4+, OP4- " in interference measurement module 20 shown in Fig. 5 respectively as to wrapping
The control signal of switch S1, S2, S3, S4 for containing.Also, control signal generation unit 42 also exports four road indicator light control signals
N_LED ", " L_LED ", " CM_LED ", " DM_LED ", are output to display module 50, by a lamp point in display module 50
It is bright, for showing selected interference measurement pattern.Wherein, " N_Local ", " L_Local ", " CM_Local ", " DM_
Local " and " N_REMOTE ", " L_REMOTE ", " CM_REMOTE ", " DM_REMOTE " eight tunnel input control signal can only have one
Road inputs for low level.
When one of them is low level as " N_Local " or " N_REMOTE ", other of signal generation unit 42 are controlled
Input signal is high level, and after control signal generation unit 42 is handled, " OP1+ ", " OP1- " voltage difference of the two ends are+5V,
" OP2+ ", " OP2- " voltage difference of the two ends are+5V, and " OP3+ ", " OP3- " voltage difference of the two ends are+5V, " OP4+ ", the both ends " OP4- " electricity
Pressure difference is 0V, and by switch S1, S2, S3, S4 combinative movement selection circuit, final N lines interference measurement pattern is selected, while N
Line indicator light is lit.
When as " L_Local " or " L_REMOTE ", one of them is low level, by controlling at signal generation unit 42
After reason, " OP1+ ", " OP1- " voltage difference of the two ends are 0V, and " OP2+ ", " OP2- " voltage difference of the two ends are 0V, " OP3+ ", " OP3- " two
Terminal voltage difference is 0V, and " OP4+ ", " OP4- " voltage difference of the two ends are+5V, and electricity is selected by switch S1, S2, S3, S4 combinative movement
Road, final L lines interference measurement pattern is selected, while L line indicator lights are lit.
When as " CM_Local " or " CM_REMOTE ", one of them is low level, by controlling signal generation unit 42
After processing, " OP1+ ", " OP1- " voltage difference of the two ends are 0V, and " OP2+ ", " OP2- " voltage difference of the two ends are 0V, " OP3+ ", " OP3- "
Voltage difference of the two ends is 0V, and " OP4+ ", " OP4- " voltage difference of the two ends are+5V, and electricity is selected by switch S1, S2, S3, S4 combinative movement
Road, final common mode interference measurement pattern is selected, while CM indicator lights are lit.
When as " DM_Local " or " DM_REMOTE ", one of them is low level, by controlling signal generation unit 42
After processing, " OP1+ ", " OP1- " voltage difference of the two ends are 0V, and " OP2+ ", " OP2- " voltage difference of the two ends are+5V, " OP3+ ", " OP3- "
Voltage difference of the two ends is+5V, and " OP4+ ", " OP4- " voltage difference of the two ends are+5V, are selected by switch S1, S2, S3, S4 combinative movement
Circuit, final DM EMI measurement pattern is selected, while DM indicator lights are lit.
When selecting the knob S6 of control model left-handed on panel, " Select_control " is pulled low, then network is in
Panel control model；When knob S6 dextrorotation, " Select_control " is raised, and network is in distance control mode.
Figure 11 shows a kind of exemplary circuit diagram of display module 50.
In this example, display module 50 is for showing the interference measurement pattern chosen."N-LED","L-LED","CM-
LED ", " DM-LED " are the indicator lights for indicating that one of four kinds of measurement patterns are selected.Only one of which indicates when normal work
Lamp is lit.When N-LED lamps are bright, N line interference measurement patterns are chosen in expression；When L-LED lamps are bright, L lines interference survey in Biao Shi Election
Amount pattern；When CM-LED lamps are bright, common mode interference measurement pattern is chosen in expression；When DM-LED lamps are bright, expression chooses DM EMI to survey
Amount pattern.
LOCAL-LED, REMOTE-LED are the display lamps of control model.When normal work in two indicator lights only wherein
One is lit.When LOCAL-LED lamps are bright, expression is currently at panel input control pattern；When REMOTE-LED lamps are bright,
Expression is currently at remote input control model.
In order to be more convenient for understanding, Figure 12 shows the overall system control of artificial mains network according to the present invention on the whole
Exemplary circuit diagram.Which includes panel control unit 41 shown in Fig. 9,42 and of control signal generation unit shown in Fig. 10
Display module 50 shown in Figure 11.
Artificial mains network using the present invention considers the differential mode work of separation altogether during designing and producing artificial mains network
Can, the function of making artificial mains network be detached with common mode, differential mode, to can both ensure the performance spy of artificial mains network
Property, while ensuring the reliable of Conduction Interference measurement result, and can be provided for designer when Conduction Interference is analyzed in rectification dry
Type is disturbed, rectification analysis is assisted.
Some embodiments of the present invention are described in detail above.Such as those skilled in the art institute energy
Understand, the whole either any steps or component of methods and apparatus of the present invention, can any computing device (including place
Reason device, storage medium etc.) either realized with hardware, firmware, software or combination thereof in the network of computing device,
This is that those of ordinary skill in the art can be real with their basic programming skill in the case where understanding present disclosure
Existing, therefore be not required to illustrate herein.
It is further clear that when arriving possible peripheral operation involved in explanation above, undoubtedly to use
Any display equipment being connected with any computing device and any input equipment, corresponding interface and control program.To sum up,
It related hardware, software in computer, computer system or computer network and realizes each in the preceding method of the present invention
Hardware, firmware, software or the combination thereof of kind operation, that is, constitute the equipment of the present invention and its each building block.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, element, step or component when being used herein, but simultaneously
It is not excluded for the presence or additional of one or more other features, element, step or component.
Although the present invention and its advantage has been described in detail it should be appreciated that without departing from by the attached claims
Defined by can carry out various changes, replacement and transformation in the case of the spirit and scope of the present invention.Moreover, the model of the present invention
Enclose the specific embodiment for being not limited only to process, equipment, means, method and steps described in specification.In the art is common
Technical staff executes and corresponding reality described herein from the disclosure it will be readily understood that can be used according to the present invention
Apply the essentially identical function of example or obtain the result essentially identical with it, existing and process to be developed in future, equipment,
Means, method or step.Therefore, the attached claims are intended to include such process, equipment, hand in the range of them
Section, method or step.
Claims (19)
1. a kind of artificial mains network, including：
Interference measurement module comprising DM EMI extraction unit altogether, the interference signal for receiving equipment under test, and by difference
Measurement pattern exports disturbance measuring signal, is measured for measuring apparatus；
Control module, the measurement pattern for controlling the interference measurement module；And
Pre-processing module comprising decoupling module and coupling module, the decoupling module is for receiving from external AC power grid
Electric power signal, reduces the electromagnetic interference of the AC power grids, and the interference signal of the equipment under test is coupled to by the coupling module
The interference measurement module of rear class；
Wherein, the measurement pattern of the interference measurement module includes L line interference measurements, N line interference measurements, DM EMI measure and
Common mode interference measures；
One end of the decoupling module is connected to the input of the AC power grids, the firewire of the one end zero curve ground wire be correspondingly connected with
The firewire of the AC power grids zero curve ground wire, the other end of the decoupling module is connected to the input of the equipment under test, this is another
The firewire of one end zero curve ground wire be connected respectively to the equipment under test firewire zero curve ground wire；
One end of the coupling module connects the input of the equipment under test, the firewire of the one end zero curve ground wire be correspondingly connected with
The firewire of the equipment under test zero curve ground wire, the other end of the coupling module is by the dry of the equipment under test being coupled out
It disturbs signal and exports and handled to next stage circuit.
2. artificial mains network according to claim 1, wherein the decoupling module is by the interference of the external AC power grid
Reduce 40dB or more.
3. artificial mains network according to claim 1, wherein the interference signal of the equipment under test includes the interference of L lines
Signal and N line interference signals.
4. artificial mains network according to claim 1, wherein the interference measurement letter exported from the interference measurement module
Number include L lines interference signal, N lines interference signal, DM EMI signal and common mode interference signal.
5. artificial mains network according to claim 1, wherein the DM EMI extraction unit altogether, for from from
Common mode interference component and DM EMI component are extracted in the interference signal of the equipment under test.
6. artificial mains network according to claim 5, wherein the DM EMI extraction unit altogether includes common mode separation
Device and differential mode separator, the common mode separator is for extracting the common mode interference component, and the differential mode separator is for extracting
The DM EMI component.
7. artificial mains network according to claim 1, wherein the interference measurement module includes being made of multiple switch
Switching group, for selecting the interference measurement module to be operated in different interference measurement patterns.
8. artificial mains network according to claim 5 further includes the switch being made of four switches S1, S2, S3 and S4
Group, for selecting the interference measurement module to be operated in different interference measurement patterns, wherein
The switch S1 is for receiving the interference signal from the equipment under test；
The switch S4 is used to export the interference measurement signal under disturbance measurement pattern to rear class measuring apparatus, is set for measuring
It is standby to measure and read；
The switch S1, S2, S4 L/N lines interference signal access in series are used for L lines interference signal or N line interference signals
It is coupled to the measuring apparatus；And
The switch S1, DM EMI extraction unit, the switch S3 and S4 altogether DM EMI signal altogether in series are logical
Road, for common mode interference signal or DM EMI signal to be coupled to the measuring apparatus.
9. artificial mains network according to claim 1, wherein the control module includes panel control unit and control
Signal generation unit, the panel control unit is for receiving from this floor plate or long-range control instruction, and described in instruction
Control the control signal for the interference measurement pattern that signal generation unit is generated for controlling the interference measurement module.
10. artificial mains network according to claim 9, wherein the panel control unit includes on device panel
It is dry to be respectively used to selection L line interference measurements pattern, N line interference measurements pattern, common mode interference measurement pattern and differential mode for four buttons
Disturb measurement pattern.
11. artificial mains network according to claim 9, wherein the panel control unit receives remote control commands,
To select L line interference measurements pattern, N line interference measurements pattern, common mode interference measurement pattern and DM EMI measurement pattern.
12. artificial mains network according to claim 10, wherein the panel control unit is connect by the ports RS232
Receive the remote control commands.
13. artificial mains network according to claim 9, wherein the panel control unit further includes knob, for leading to
Knob described in left or right rotation is crossed to select the control of this floor plate or remote control.
14. artificial mains network according to claim 9, wherein the control that the control signal generation unit is generated
Signal be used to control each switch in switching group in the interference measurement module upper group or set aside, it is different to select
Interference measurement pattern.
15. artificial mains network according to claim 1 further includes display module, for showing the interference measurement mould
Residing interference measurement pattern in formula work.
16. artificial mains network according to claim 15, wherein the display module is shown including four jamming patterns
Lamp shows disturbance measurement pattern by lighting disturbance pattern display lamp.
17. artificial mains network according to claim 15, wherein the display module is shown including two control models
Lamp shows that the control module is the control of this floor plate or remote control by lighting different control model display lamps.
18. artificial mains network according to claim 1 further includes output module, which is located at the interference
The rear class of measurement module, for interference measurement signal to be output to external measuring apparatus.
19. artificial mains network according to claim 18, wherein the output module is receiver access.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410258134.3A CN105334404B (en) | 2014-06-11 | 2014-06-11 | Artificial mains network |
| TW103136959A TWI538340B (en) | 2014-06-11 | 2014-10-27 | Artificial mains network |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410258134.3A CN105334404B (en) | 2014-06-11 | 2014-06-11 | Artificial mains network |
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| CN105334404B true CN105334404B (en) | 2018-10-23 |
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| TW (1) | TWI538340B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106100316B (en) * | 2016-07-11 | 2019-11-15 | 深圳市知用电子有限公司 | Artificial mains network's circuit |
| CN112731017B (en) * | 2020-12-21 | 2023-04-11 | 北京无线电计量测试研究所 | Device for measuring and rectifying conduction emission items of power line |
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Also Published As
| Publication number | Publication date |
|---|---|
| TWI538340B (en) | 2016-06-11 |
| TW201547150A (en) | 2015-12-16 |
| CN105334404A (en) | 2016-02-17 |
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