CN109212325A - A kind of power cable crosstalk couplings test method - Google Patents
A kind of power cable crosstalk couplings test method Download PDFInfo
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- CN109212325A CN109212325A CN201811203050.4A CN201811203050A CN109212325A CN 109212325 A CN109212325 A CN 109212325A CN 201811203050 A CN201811203050 A CN 201811203050A CN 109212325 A CN109212325 A CN 109212325A
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- 230000008878 coupling Effects 0.000 title claims abstract description 77
- 238000010168 coupling process Methods 0.000 title claims abstract description 77
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 77
- 238000010998 test method Methods 0.000 title claims abstract description 22
- 230000005284 excitation Effects 0.000 claims abstract description 71
- 238000012360 testing method Methods 0.000 claims abstract description 40
- 230000005611 electricity Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 16
- 238000010586 diagram Methods 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- VEMKTZHHVJILDY-UHFFFAOYSA-N resmethrin Chemical group CC1(C)C(C=C(C)C)C1C(=O)OCC1=COC(CC=2C=CC=CC=2)=C1 VEMKTZHHVJILDY-UHFFFAOYSA-N 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
- G01R29/0871—Complete apparatus or systems; circuits, e.g. receivers or amplifiers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0807—Measuring electromagnetic field characteristics characterised by the application
- G01R29/0814—Field measurements related to measuring influence on or from apparatus, components or humans, e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning
- G01R29/0835—Testing shielding, e.g. for efficiency
Abstract
The invention discloses a kind of power cable crosstalk couplings test methods, including setting both threads cable to place in the same plane, and the both threads cable is respectively to motivate cable and coupling cable；One end of the excitation cable is connect with AC power source, the other end connects corresponding mesh power load；One end of the coupling cable is connect with DC power supply, the other end connects DC load；Oscillograph is accessed on the high bit line of coupling cable；Voltage waveform of the test and excitation cable in no power situation and energization on coupling cable respectively obtains interference of the excitation cable to coupling cable；The combined use that the method for the present invention passes through excitation cable and coupling cable, voltage waveform is detected using oscillograph, to solution must not embody completely cable in actual operation intercouple performance the technical issues of, and then obtain the interference true value for being mutually coupled performance to cable in actual operation；This method structure is simple, and operation is easy, and testing cost is low.
Description
Technical field
The present invention relates to power cable field more particularly to a kind of power cable crosstalk couplings test methods.
Background technique
When product is tested by EMC, power supply line leads to the interference of other cables to test unacceptable feelings frequent occurrence
Condition causes such case to be because electric current has the characteristics that frequency is low, amplitude is high on power supply line, to the coupling of cable around
It is very important to close interference effect, therefore, the coupling performance studied between cable is to solve the problems, such as one of main path of EMC.
In the prior art, common cable crosstalk test mode is to measure cable S parameter by net point to assess cable coupling
Close performance, this method specifically: both threads cable is connect respectively in 1,2 ports of net point, another termination matched load, S21 ginseng is measured
Number is crossfire value, and the characteristic due to this method just for cable structure carries out, and does not account for power supply line and is working normally
When cable on electric signal it is influenced, so measure result be the crosstalk of both threads cable in a non-operative state, can not be complete
The performance that intercouples in the existing real work of entirety, lacks accuracy.
Summary of the invention
The present invention provides a kind of power cable crosstalk couplings test methods, must not embody cable completely in reality with solution
In work intercouple performance the technical issues of, to obtain the interference number of the performance that intercouples of cable in actual operation
Value, and then realize the interference true value for being mutually coupled performance obtained to cable in actual operation.
In order to solve the above-mentioned technical problem, the embodiment of the invention provides a kind of power cable crosstalk couplings test method,
Include:
Both threads cable is arranged to place in the same plane, the both threads cable is respectively to motivate cable and coupling cable；
One end of the excitation cable is connect with AC power source, the other end connects corresponding mesh power load；
One end of the coupling cable is connect with DC power supply, the other end connects DC load；
Oscillograph is accessed on the high bit line of coupling cable；
Voltage waveform of the test and excitation cable in no power situation and energization on coupling cable respectively, is motivated
Interference of the cable to coupling cable；
Preferably, the test and excitation cable respectively is in no power situation and energization on coupling cable
Voltage waveform obtains interference of the excitation cable to coupling cable, comprising:
Test and excitation cable couples the voltage waveform on cable in no power, and is recorded as first voltage waveform；
Test and excitation cable couples the voltage waveform on cable in energization, and is recorded as second voltage waveform；
In conjunction with the numberical range of first voltage waveform and second voltage waveform, show that excitation cable does coupling cable
It disturbs；
Preferably, the test method further includes the line attachment impedance stable network in excitation cable circuit
LISN, described one end LISN are connect with the excitation cable, and the other end is connect with the AC power source；
Preferably, the excitation cable is parallel with the positional relationship for coupling cable；
Preferably, the load connecting with excitation cable and the load connecting with coupling cable are electric furnace；
Preferably, the AC power source is single phase alternating current power supply or three-phase alternating-current supply；
Preferably, the single phase alternating current power supply is 220V, and 50Hz single phase alternating current power supply or 115V, 400Hz are single-phase
AC power source；
Preferably, the three-phase alternating-current supply is 380V, 50Hz three-phase alternating-current supply；
Preferably, the DC power supply is 28V DC power supply.
A kind of power cable crosstalk couplings test method, comprising:
Both threads cable is arranged to place in the same plane, the both threads cable is respectively to motivate cable and coupling cable；
One end of the excitation cable is connect with AC power source, the other end connects corresponding mesh power load；
One end of the coupling cable is connect with DC power supply, the other end connects DC load；
Oscillograph is accessed on the high bit line of coupling cable；
Voltage waveform of the test and excitation cable in no power situation and energization on coupling cable respectively, is motivated
Interference of the cable to coupling cable；
Voltage waveform of the test and excitation cable respectively in no power situation and energization on coupling cable, obtains
Motivate interference of the cable to coupling cable, comprising:
Test and excitation cable couples the voltage waveform on cable in no power, and is recorded as first voltage waveform；
Test and excitation cable couples the voltage waveform on cable in energization, and is recorded as second voltage waveform；
In conjunction with the numberical range of first voltage waveform and second voltage waveform, show that excitation cable does coupling cable
It disturbs；
The test method further includes line attachment impedance stable network LISN, the LISN mono- in excitation cable circuit
End is connect with the excitation cable, and the other end is connect with the AC power source；
The excitation cable is parallel with the positional relationship for coupling cable；
The load connecting with excitation cable and the load connecting with coupling cable are electric furnace；
The AC power source is single phase alternating current power supply or three-phase alternating-current supply；
The single phase alternating current power supply is 220V, 50Hz single phase alternating current power supply or 115V, 400Hz single phase alternating current power supply；
The three-phase alternating-current supply is 380V, 50Hz three-phase alternating-current supply；
The DC power supply is 28V DC power supply.
Compared with the prior art, the embodiment of the present invention has the following beneficial effects:
1, by the combined use of excitation cable and coupling cable, voltage waveform is detected using oscillograph, is obtained to cable
The interference true value for being mutually coupled performance in actual operation.
2, structure is simple, and operation is easy, and testing cost is low.
Detailed description of the invention
Fig. 1: for the specific steps flow diagram of embodiment of the present invention method；
Fig. 2: for the flow diagram of step S5 in embodiment of the present invention method；
Fig. 3: being single-phase alternating current in embodiment of the present invention method to direct current cable crosstalk test schematic diagram；
Fig. 4: being single-phase alternating current in embodiment of the present invention method to direct current cable crosstalk test case figure；
Fig. 5: high potential line instance graph is connected for oscilloprobe in embodiment of the present invention method；
Fig. 6: being three-phase alternating current in embodiment of the present invention method to direct current cable crosstalk test schematic diagram；
Fig. 7: being three-phase alternating current in embodiment of the present invention method to direct current cable crosstalk test case figure.
In figure: 1, loading；2, cable is motivated；3, cable is coupled；4, DC power supply；5,LISN.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1 is please referred to, the preferred embodiment of the present invention provides a kind of power cable crosstalk couplings test method, comprising:
S1, setting both threads cable are placed in the same plane, and the both threads cable is respectively to motivate cable and coupling cable；
One end of the excitation cable is connect by S2 with AC power source, and the other end connects corresponding mesh power load；
One end of the coupling cable is connect by S3 with DC power supply, and the other end connects DC load；
S4 accesses oscillograph on the high bit line of coupling cable；
S5, voltage waveform of the test and excitation cable in no power situation and energization on coupling cable, obtains respectively
Motivate interference of the cable to coupling cable.
The present embodiment is detected voltage waveform using oscillograph, is obtained by the combined use of excitation cable and coupling cable
To the interference true value for being mutually coupled performance of cable in actual operation.
Referring to Fig. 2, in the present embodiment, the cable of test and excitation respectively is coupled in no power situation and energization
Voltage waveform on cable obtains interference of the excitation cable to coupling cable, comprising:
S51, test and excitation cable couples the voltage waveform on cable in no power, and is recorded as first voltage wave
Shape；
S52, test and excitation cable couples the voltage waveform on cable in energization, and is recorded as second voltage wave
Shape；
S53 obtains excitation cable to coupling cable in conjunction with the numberical range of first voltage waveform and second voltage waveform
Interference.
In the present embodiment, line attachment the impedance stable network LISN, the LISN mono- in excitation cable circuit
End is connect with the excitation cable, and the other end is connect with the AC power source.
In the present embodiment, the excitation cable is parallel with the positional relationship for coupling cable.
In the present embodiment, the load connecting with excitation cable and the load connecting with coupling cable are electric furnace.
In the present embodiment, the AC power source is single phase alternating current power supply or three-phase alternating-current supply.
In the present embodiment, the single phase alternating current power supply is 220V, and 50Hz single phase alternating current power supply or 115V, 400Hz are single-phase
AC power source.
In the present embodiment, the three-phase alternating-current supply is 380V, 50Hz three-phase alternating-current supply.
In the present embodiment, the DC power supply is 28V DC power supply.
The specific implementation process of the present embodiment is as follows:
Referring to Fig. 3, in embodiment, we test single phase alternating current power supply: firstly, shielding indoor test desk
On tested, both threads cable is placed in parallel.Wherein single line cable is excitation cable (i.e. interference cable), and excitation cable passes through
LISN connects external power supply power supply, and the other end terminates Corresponding matching power termination.There are two effects by LISN herein: first is that output end
It provides and stablizes impedance；Second is that influence of the interference of isolation feeder ear to excitation cable.In addition single line cable is coupling cable (i.e. quilt
Interfere cable), couple a termination DC source of cable, another termination DC load.Excitation cable and coupling cable take electricity
Furnace is as terminating load.Voltage waveform on line is detected by oscillograph on the high bit line of coupling cable.
Single phase ac cable is illustrated in figure 3 to the crosstalk connection schematic diagram of direct current cable, wherein coupling length L and spacing
D can according to the actual situation or test requirements document is adjusted.Common single-phase alternating current includes: 220V50Hz, 115V 400Hz,
The test arrangement of direct current cable crosstalk is consistent.For common two classes single phase ac cable, Fig. 4 gives it to AC line
The practical connection schematic diagram of cable interference, Fig. 5 give oscilloprobe and carry out waveform acquisition in high bit line.Firstly, test and excitation
Cable couples the voltage waveform on cable in no power, and is recorded as first voltage waveform；Then, test and excitation cable
The voltage waveform on cable is coupled in energization, and is recorded as second voltage waveform；Finally, in conjunction with first voltage waveform and
The numberical range of second voltage waveform obtains interference of the excitation cable to coupling cable.
The method of the present invention can also analyze three-phase alternating current:
Referring to figure 6 and figure 7, in the present embodiment, we test three-phase alternating-current supply, such as the alternating current in Fig. 6
Source is the three-phase alternating current of 380V 50Hz, and three-phase alternating current connects the crosstalk connection schematic diagram and actual test of 28V direct current cable
Map interlinking (to be distinguished with single phase ac cable to direct current cable crosstalk test, it will be between three-phase alternating current cable and direct current cable
Show certain angle).
Finally, measuring excitation cable no power situation respectively and coupling the voltage waveform on cable in the case of being powered
Obtain interference of the excitation cable to coupling cable.
The method of the present invention is not limited to three kinds of common power cable type (220V 50Hz, 115V of this patent proposition
400Hz；380V 50Hz), other AC power source types are produced by programmable power supply, the crosstalk of DC power supply cable is tested
The crosstalk test approach proposed with this patent is consistent.
The present invention detects voltage waveform using oscillograph, to solve by the combined use of excitation cable and coupling cable
Must not embody completely cable in actual operation intercouple performance the technical issues of, and then obtain to cable in practical work
The interference true value for being mutually coupled performance in work；This method structure is simple, and operation is easy, and testing cost is low.
Particular embodiments described above has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that the above is only a specific embodiment of the present invention, the protection being not intended to limit the present invention
Range.It particularly points out, to those skilled in the art, all within the spirits and principles of the present invention, that is done any repairs
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of power cable crosstalk couplings test method characterized by comprising
Both threads cable is arranged to place in the same plane, the both threads cable is respectively to motivate cable and coupling cable；
One end of the excitation cable is connect with AC power source, the other end connects corresponding mesh power load；
One end of the coupling cable is connect with DC power supply, the other end connects DC load；
Oscillograph is accessed on the high bit line of coupling cable；
Voltage waveform of the test and excitation cable in no power situation and energization on coupling cable respectively obtains excitation cable
Interference to coupling cable.
2. test method as described in claim 1, which is characterized in that the test and excitation cable respectively in no power situation and
The voltage waveform on cable is coupled in the case of energization, obtains interference of the excitation cable to coupling cable, comprising:
Test and excitation cable couples the voltage waveform on cable in no power, and is recorded as first voltage waveform；
Test and excitation cable couples the voltage waveform on cable in energization, and is recorded as second voltage waveform；
In conjunction with the numberical range of first voltage waveform and second voltage waveform, interference of the excitation cable to coupling cable is obtained.
3. test method as described in claim 1, which is characterized in that the test method further includes in excitation cable circuit
Line attachment impedance stable network LISN, described one end LISN are connect with the excitation cable, the other end and the AC power source
Connection.
4. test method as described in claim 1, which is characterized in that the excitation cable and the positional relationship for coupling cable are
In parallel.
5. test method as described in claim 1, which is characterized in that the load being connect with excitation cable and and coupling line
The load of cable connection is electric furnace.
6. test method as described in claim 1, which is characterized in that the AC power source is single phase alternating current power supply or three intersections
Galvanic electricity source.
7. test method as claimed in claim 6, which is characterized in that the single phase alternating current power supply is 220V, 50Hz blow-up
Galvanic electricity source or 115V, 400Hz single phase alternating current power supply.
8. test method as claimed in claim 6, which is characterized in that the three-phase alternating-current supply is 380V, and 50Hz tri- intersects
Galvanic electricity source.
9. test method as described in claim 1, which is characterized in that the DC power supply is 28V DC power supply.
10. a kind of power cable crosstalk couplings test method characterized by comprising
Both threads cable is arranged to place in the same plane, the both threads cable is respectively to motivate cable and coupling cable；
One end of the excitation cable is connect with AC power source, the other end connects corresponding mesh power load；
One end of the coupling cable is connect with DC power supply, the other end connects DC load；
Oscillograph is accessed on the high bit line of coupling cable；
Voltage waveform of the test and excitation cable in no power situation and energization on coupling cable respectively obtains excitation cable
Interference to coupling cable；
Voltage waveform of the test and excitation cable respectively in no power situation and energization on coupling cable, is motivated
Interference of the cable to coupling cable, comprising:
Test and excitation cable couples the voltage waveform on cable in no power, and is recorded as first voltage waveform；
Test and excitation cable couples the voltage waveform on cable in energization, and is recorded as second voltage waveform；
In conjunction with the numberical range of first voltage waveform and second voltage waveform, interference of the excitation cable to coupling cable is obtained；
The test method further include excitation cable circuit in line attachment impedance stable network LISN, described one end LISN with
The excitation cable connection, the other end are connect with the AC power source；
The excitation cable is parallel with the positional relationship for coupling cable；
The load connecting with excitation cable and the load connecting with coupling cable are electric furnace；
The AC power source is single phase alternating current power supply or three-phase alternating-current supply；
The single phase alternating current power supply is 220V, 50Hz single phase alternating current power supply or 115V, 400Hz single phase alternating current power supply；
The three-phase alternating-current supply is 380V, 50Hz three-phase alternating-current supply；
The DC power supply is 28V DC power supply.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811203050.4A CN109212325B (en) | 2018-10-16 | 2018-10-16 | Power cable crosstalk coupling test method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811203050.4A CN109212325B (en) | 2018-10-16 | 2018-10-16 | Power cable crosstalk coupling test method |
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| CN109212325A true CN109212325A (en) | 2019-01-15 |
| CN109212325B CN109212325B (en) | 2024-04-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109900987A (en) * | 2019-03-13 | 2019-06-18 | 上海市计量测试技术研究院 | A kind of multi-functional decoupling network |
| CN110488118A (en) * | 2019-08-06 | 2019-11-22 | 上海移为通信技术股份有限公司 | The anti-interference test method and its system of power supply chip |
| CN110554247A (en) * | 2019-08-28 | 2019-12-10 | 广州广电计量检测股份有限公司 | crosstalk simulation modeling method and simulation model of non-parallel cable |
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| Publication number | Publication date |
|---|---|
| CN109212325B (en) | 2024-04-09 |
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