CN107478920A - New-energy automobile radiation disturbance risk assessment easily-testing system - Google Patents
New-energy automobile radiation disturbance risk assessment easily-testing system Download PDFInfo
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- CN107478920A CN107478920A CN201710370796.3A CN201710370796A CN107478920A CN 107478920 A CN107478920 A CN 107478920A CN 201710370796 A CN201710370796 A CN 201710370796A CN 107478920 A CN107478920 A CN 107478920A
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- 238000012360 testing method Methods 0.000 title claims abstract description 44
- 230000005855 radiation Effects 0.000 title claims abstract description 21
- 238000012502 risk assessment Methods 0.000 title claims abstract description 15
- 238000001228 spectrum Methods 0.000 claims abstract description 29
- 239000000523 sample Substances 0.000 claims abstract description 27
- 238000013459 approach Methods 0.000 claims abstract description 4
- 229910000859 α-Fe Inorganic materials 0.000 claims description 22
- 239000011324 bead Substances 0.000 claims description 16
- 238000010183 spectrum analysis Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 210000000080 chela (arthropods) Anatomy 0.000 claims description 4
- 230000003595 spectral effect Effects 0.000 claims description 4
- 238000012512 characterization method Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000005672 electromagnetic field Effects 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000005670 electromagnetic radiation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 206010010219 Compulsions Diseases 0.000 description 1
- 208000032365 Electromagnetic interference Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The present invention relates to new-energy automobile radiation disturbance risk assessment easily-testing system.Including：EMI pops one's head in, and the EMI pops one's head in is arranged on the EMI data of parts and cable on vehicle for obtaining, and the EMI data are noise source current frequency spectrum data, investigate thoroughly electromagnetic disturbance source in electromagnetic compatibility three elements, electromagnetic coupled approach；Spectrum analyzer or receiver 4, the rule changed for showing voltage amplitude with frequency, measure the interference strength in each frequency；The EMI probes are connected by coaxial cable 3 with spectrum analyzer or receiver 4.This easily-testing system equipment is simple, operation and maintenance are convenient, can find the EMI problems in vehicle test in time, and be improved, it is ensured that the disposable percent of pass of vehicle, saves vehicle EMC rectification testing costs.
Description
Technical field
The invention belongs to technical field of new energy, and in particular to new-energy automobile radiation disturbance risk assessment is simply surveyed
Test system.
Background technology
New-energy automobile is mainly auxiliary by batteries, electric machine controller and motor, DC/DC switch power modules and correlation
Connecting line etc. is helped to form independent power electronic equipment, compared with the digital circuit as signal transacting, this power electronics dress
Put that voltage, current transformation rate are very high, and electromagnetic interference caused by its work is more serious.
These electromagnetic interferences may be in the form of an electromagnetic wave to external radiation, it is also possible to by the cable being attached thereto to disturb
The form of electric current is propagated to other equipment, and in the confined space of automobile, this interference is potentially hazardous more serious, main table
Now：The service behaviour of vehicle power electronic equipment is degraded, reduce the service life of device, some first devices can be caused when serious
Part is breakdown and can not work；Vehicle power electronic equipment is set to produce false triggering action, in some instances it may even be possible to cause its own triggering electricity
The false triggering on road；Communication security between influence system；Influence electronic equipment, or the normal work of road vehicle nearby nearby outside car
Make.
In a word, electromagnetic compatibility problem has turned into one of technical bottleneck in new-energy automobile evolution, increasingly causes
Pay attention to, state compulsion performs entire new energy automobile EMC examination criterias, if EMC is not up to standard, will be unable to market sale.
New-energy automobile EMC testing standards GB/T 18387 frequency test scope is primarily directed to 9KHz~30MHZ
Electric field and magnetic field EMC emission test, this frequency range is the model of the switching tube electromagnetic interference such as power electronic equipment IGBT, MOS
Enclose, and new-energy automobile is most difficult to by EMC projects.IGBT working frequencies are low (below 10KHZ), high current, high voltage, electricity
Magnetic disturbance intensity is big, theoretical to prove that its interfering frequency mainly in below 10MHZ, causes what vehicle EMI tests did not passed through with actual measurement
Principal element.This kind of electromagnetic radiation harassing and wrecking (containing below 30MHZ) are mainly used as antenna by cable launches, and measures on cable
Common mode current, the harassing and wrecking of vehicle low frequency electromagnetic can be predicted.
Existing vehicle electromagnetic radiation harasses test laboratory by " 10 meters of methods " semi-anechoic chamber, equipped with high end reception
Machine, antenna, coaxial cable, test software, computer, tested for vehicle.
Vehicle EMC lab constructions, investment several ten million, or even more than one hundred million members, take larger factory field, and construction period 2
~3 years, later experiments room, which is safeguarded, also needed to many funds and manpower, and this can increase enterprise operation cost.
EMC emission test is carried out in vehicle electromagnetic compatibility laboratory, the EMC test result final as vehicle can not be fast
Speed is pin-pointed to the parts and cable to go wrong.Vehicle EMC laboratories belong to electromagnetic field far field test, it is impossible to accurate, fast
Telling for speed is RE excessive problems caused by which parts on vehicle (EMI source head), cable (EMI antennas), to vehicle
EMI rectifications are made troubles with analysis.
The content of the invention
It is contemplated that at least solves one of technical problem in above-mentioned correlation technique to a certain extent.Therefore, this hair
Bright offer new-energy automobile radiation disturbance risk assessment easily-testing system, is vehicle radiation disturbance using easily-testing system
(far field) is tested provides foundation with rectification.
The present invention technical solution be：New-energy automobile radiation disturbance risk assessment easily-testing system, including：
EMI pops one's head in, and the EMI pops one's head in is arranged on the EMI data of parts and cable on vehicle for obtaining, and the EMI data are to make an uproar
Sound source current spectrum data, investigate thoroughly electromagnetic disturbance source in electromagnetic compatibility three elements, electromagnetic coupled approach；And according to electromagnetic near field
Test data, and electromagnetic field near field and far field associate system, are tested for vehicle radiation disturbance (far field) and providing foundation with rectifying and improving；
Spectrum analyzer or receiver, the rule changed for showing voltage amplitude with frequency, measure dry in each frequency
Disturb intensity；
The EMI probes are connected by coaxial cable with spectrum analyzer or receiver.
According to embodiments of the present invention, it is cable that EMI probes, which include ferrite bead, near field probes, the ferrite bead,
Current coupling clamps.
According to embodiments of the present invention, the head of the near field probes is a coil, and cable current coupling pincers are magnetic cores, institute
Coil is stated to be entangled on magnetic core.
According to embodiments of the present invention, the ferrite bead is the transformer that one number of turn of primary coil is 1.
Using the method for testing of new-energy automobile radiation disturbance risk assessment easily-testing system, step includes：
S1：New-energy automobile trailing wheel is jacked up, allows the hanging free-runing operation of trailing wheel；
S2：Whole cables of parts on vehicle are found out, are stuck in a paricles, ferrite magnet ring on the single line cable chosen；
S3：Ferrite bead blocks EMI near field probes simultaneously；
S3：Spectrum analysis is carried out to the electric current on cable with real time spectrum pattern, the frequency spectrum is 9K-30M frequency ranges；
S4：It is enclosed on simultaneously on the power cable of parts with a larger-diameter ferrite bead, ferrite bead is worn simultaneously
Cross near field probes；
S5：Spectrum analysis is carried out to the common mode current on parts power electric cable with real time spectrum pattern, the frequency spectrum is 9K-
30M frequency ranges；
S6：With reference to two groups of spectral characteristic curves, the larger Frequency point of amplitude on curve is found.
The spectrum analyzer resolution bandwidth is 9KHZ, and video bandwidth is that 30kHz is under test condition, and spectrum analyzer is surveyed
The limit value of examination is 9KHZ~10MHZ, 47dbuV；Or 10MHZ~30MHZ, 30dbuv；Or when 30MHZ~50MHZ, 40dbuv, can
To pass through the EMC emission test of the low-frequency ranges such as GB18387, GB14238.
The method have the benefit that：Easily-testing system can find the EMI problems in vehicle test in time, go forward side by side
Row improves, it is ensured that the disposable percent of pass of vehicle, saves vehicle EMC rectification testing costs；Easily-testing system can utilize existing frequency
Spectrum analysis or receiver, self-control probe, cost is low, and equipment is simple, operation and maintenance are convenient.
Brief description of the drawings
Fig. 1 is new-energy automobile radiation disturbance risk assessment easily-testing system schematic.
Fig. 2 is EMI transfer principle figures.
Fig. 3 is the EMI risk test pictures of motor driving power cable.
In figure：1- ferrite beads；2- near field probes；3- coaxial cables；4- spectrum analyzers or receiver.
Embodiment
Embodiments of the invention are described in detail below.The embodiments described below with reference to the accompanying drawings are exemplary, only
For explaining the present invention, and it is not considered as limiting the invention.
As shown in figure 1, new-energy automobile radiation disturbance risk assessment easily-testing system, including：
EMI pops one's head in, including near field probes 2, cable current coupling pincers；The EMI pops one's head in is arranged on vehicle zero for obtaining
The EMI data of part and cable, the EMI data are noise source current frequency spectrum data, investigate thoroughly the electromagnetism in electromagnetic compatibility three elements
Harassing and wrecking source, electromagnetic coupled approach；And according to electromagnetic near field test data, and electromagnetic field near field and far field associate system, to be whole
Car radiation disturbance (far field) is tested provides foundation with rectification；
Spectrum analyzer or receiver 4, the rule changed for showing voltage amplitude with frequency, measure dry in each frequency
Disturb intensity；
The EMI probes are connected by coaxial cable 3 with spectrum analyzer or receiver 4.
Cable EMI pops one's head in：The ferrite magnetic for being used for interference electric current signal in measure traverse line designed according to faraday's principle
Ring 1, substantially it is the transformer that one number of turn of primary coil is 1.
The size of current for flowing through wire can be measured using current probe.
EMI transfer principles are exactly the electric current (AC) in sensor wire；Changed, it is necessary to first there is electric current to flow through wire,
According to the amplitude of electric current flowing and direction structure and eliminate flux fields.
When a coil is put in this, as shown in Fig. 2 change flux fields can by simple conversion operation,
Cause voltage in coil.This conversion operation is the basis of EMI probes.
EMI probe heads are actually a coil, and this coil is entangled on magnetic core.When this probe head is maintained at finger
When determining direction and the wire close to carrying EMI electric currents, probe can export an EMI voltages, and this voltage disturbs with EMI in wire
Current ratio is known.Under any circumstance, EMI probes have a low frequency cut-off points, and this includes direct current (DC), because direct current
The flux fields of change will not be caused, therefore switching motion will not be caused.In addition in very close DC frequency, such as 50Hz,
Flux fields pace of change is not enough to realize that conversion acts.
As shown in Figure 3.The EMI method for testing risk of motor driving power cable：Jack-up EUT (new energy vapour
Car) trailing wheel, allow its hanging free-runing operation.Electric machine controller three-phase UVW output cords are found, it is taken at its output port
He Yigen is stuck on the cable chosen, it is near that ferrite bead 1 blocks EMI simultaneously as test object with a paricles, ferrite magnet ring 1
Field probe 2, spectrum analysis (being directed to 9K-30M frequency ranges) is then carried out to the electric current in motor drives line with real time spectrum pattern, so
It is enclosed on simultaneously on tri- lines of UVW with a larger-diameter ferrite bead 1 afterwards, ferrite bead 1 is also cross near field probes
2, spectrum analysis (being directed to 9K-30M frequency ranges) is then carried out to the common mode current in motor drives line with real time spectrum pattern, with reference to
Two groups of spectral characteristic curves, the larger Frequency point of amplitude on curve is found, makes related rectification, can effectively reduce vehicle radiation
It is horizontal so that vehicle disposably reaches more than 85% by the percent of pass of GB/T 18387-2008 standards, and meeting company standard will
Ask.
The EMI method of testings of electrokinetic cell near field electromagnetic field：Jack-up EUT (new-energy automobile) trailing wheel, allow it
Hanging free-runing operation.Total just total minus two input cables of battery of high-tension distribution box are found, it is taken at its output port
He Yigen is stuck on the cable chosen with a paricles, ferrite magnet ring as test object, and magnet ring blocks EMI near field probes simultaneously,
Then spectrum analysis (being directed to 9K-30M frequency ranges) is carried out to the electric current on battery output cord with real time spectrum pattern, then with one
Larger-diameter ferrite is enclosed in total just total negative both threads simultaneously, then magnet ring uses real time spectrum also cross near field probes
Pattern carries out spectrum analysis (being directed to 9K-30M frequency ranges) to the common mode current on battery output cord, bent with reference to two groups of spectral characteristics
Line, the larger Frequency point of amplitude on curve is found, makes related rectification, can effectively reduce vehicle radiation level so that vehicle
Disposably reach more than 85% by the percent of pass of GB/T 18387-2008 standards, meet company standard requirement.
The explanation of above-described embodiment is only intended to understand the method and its core concept of the present invention.It should be pointed out that for this
For the those of ordinary skill in field, under the premise without departing from the principles of the invention, some improvement can also be carried out to the present invention
And modification, these are improved and modification will be also fallen into the protection domain of the claims in the present invention.
Claims (6)
1. new-energy automobile radiation disturbance risk assessment easily-testing system, it is characterised in that including：
EMI pops one's head in, and the EMI pops one's head in is arranged on the EMI data of parts and cable on vehicle, the EMI data for obtaining
For noise source current frequency spectrum data, electromagnetic disturbance source in electromagnetic compatibility three elements, electromagnetic coupled approach are investigated thoroughly；
Spectrum analyzer or receiver (4), the rule changed for showing voltage amplitude with frequency, are measured in each frequency
Interference strength；
The EMI probes are connected by coaxial cable (3) with spectrum analyzer or receiver (4).
2. new-energy automobile radiation disturbance risk assessment easily-testing system according to claim 1, it is characterised in that institute
It is cable current coupling pincers to state EMI probes to include ferrite bead (1), near field probes (2), the ferrite bead (1).
3. new-energy automobile radiation disturbance risk assessment easily-testing system according to claim 2, it is characterised in that institute
The head for stating near field probes (2) is a coil, and cable current coupling pincers are magnetic cores, and the coil is entangled on magnetic core.
4. new-energy automobile radiation disturbance risk assessment easily-testing system according to claim 2, it is characterised in that institute
It is the transformer that one number of turn of primary coil is 1 to state ferrite bead (1).
5. using the test of the new-energy automobile radiation disturbance risk assessment easily-testing system described in claim any one of 1-4
Method, its characterization step include：
S1：New-energy automobile trailing wheel is jacked up, allows the hanging free-runing operation of trailing wheel；
S2：The power cable of parts on vehicle is found out, is stuck in a paricles, ferrite magnet ring on the single line cable chosen；
S3：Ferrite bead (1) while block EMI near field probes (2)；
S3：Spectrum analysis is carried out to the electric current on cable with real time spectrum pattern, the frequency spectrum is 9K-30M frequency ranges；
S4：With a larger-diameter ferrite bead (1) while it is enclosed on the power cable of parts, ferrite bead (1)
Also cross near field probes (2)；
S5：Spectrum analysis is carried out to the common mode current on parts whole cable with real time spectrum pattern, the frequency spectrum is 9K-
30M frequency ranges；
S6：With reference to two groups of spectral characteristic curves, the larger Frequency point of amplitude on curve is found.
6. the method for testing of new-energy automobile radiation disturbance risk assessment easily-testing system according to claim 5, its
It is characterised by that spectrum analyzer resolution bandwidth is 9KHZ, video bandwidth is that 30kHz is under test condition, spectrum analyzer test
Limit value is 9KHZ~10MHZ, 47dbuV；Or 10MHZ~30MHZ, 30dbuv；Or 30MHZ~50MHZ, 40dbuv.
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| CN201710370796.3A CN107478920A (en) | 2017-05-23 | 2017-05-23 | New-energy automobile radiation disturbance risk assessment easily-testing system |
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| CN201710370796.3A CN107478920A (en) | 2017-05-23 | 2017-05-23 | New-energy automobile radiation disturbance risk assessment easily-testing system |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108776272A (en) * | 2018-05-28 | 2018-11-09 | 煤炭科学技术研究院有限公司 | A kind of test system of frequency conversion equipment Electro Magnetic Compatibility |
| CN110646668A (en) * | 2019-08-15 | 2020-01-03 | 威凯检测技术有限公司 | Automobile EMI (electro-magnetic interference) diagnosis device and method adopting line array probe |
| CN111103468A (en) * | 2018-10-26 | 2020-05-05 | 湖南中车时代电动汽车股份有限公司 | EMC (electro magnetic compatibility) testing method and device for electronic parts of new energy automobile |
| CN111208362A (en) * | 2019-12-05 | 2020-05-29 | 浙江合众新能源汽车有限公司 | Method and system for rapidly evaluating EMC test risk of whole vehicle |
| CN112698134A (en) * | 2020-12-21 | 2021-04-23 | 中国汽车工程研究院股份有限公司 | Whole vehicle electromagnetic self-compatibility risk diagnosis system and method based on global bus network |
| CN113484636A (en) * | 2021-06-22 | 2021-10-08 | 东风汽车集团股份有限公司 | Wire harness loop crosstalk prevention method and system based on unmanned system and storage medium |
| CN114675111A (en) * | 2022-03-31 | 2022-06-28 | 重庆长安新能源汽车科技有限公司 | Electromagnetic compatibility emission test system and method for all-in-one electric drive system |
| WO2022160572A1 (en) * | 2021-01-26 | 2022-08-04 | 浙江亚太机电股份有限公司 | Apparatus and method for measuring conducted emission current of ecu signal line |
| CN116953390A (en) * | 2023-07-01 | 2023-10-27 | 安徽博达项目管理咨询有限公司 | Data detection system for electromagnetic compatibility of optical cable pipeline |
| CN117538670A (en) * | 2024-01-10 | 2024-02-09 | 中国汽车技术研究中心有限公司 | Whole vehicle electromagnetic emission pre-test method and system |
| CN118330368A (en) * | 2024-04-30 | 2024-07-12 | 深圳阿尔法商品检验有限公司 | Electromagnetic compatibility safety test method and system for electric toy |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108776272A (en) * | 2018-05-28 | 2018-11-09 | 煤炭科学技术研究院有限公司 | A kind of test system of frequency conversion equipment Electro Magnetic Compatibility |
| CN111103468A (en) * | 2018-10-26 | 2020-05-05 | 湖南中车时代电动汽车股份有限公司 | EMC (electro magnetic compatibility) testing method and device for electronic parts of new energy automobile |
| CN111103468B (en) * | 2018-10-26 | 2022-03-11 | 湖南中车时代电动汽车股份有限公司 | EMC (electro magnetic compatibility) testing method and device for electronic parts of new energy automobile |
| CN110646668A (en) * | 2019-08-15 | 2020-01-03 | 威凯检测技术有限公司 | Automobile EMI (electro-magnetic interference) diagnosis device and method adopting line array probe |
| CN110646668B (en) * | 2019-08-15 | 2024-02-02 | 威凯检测技术有限公司 | Automobile EMI diagnosis device and diagnosis method adopting line array probe |
| CN111208362B (en) * | 2019-12-05 | 2022-08-12 | 浙江合众新能源汽车有限公司 | Method and system for rapidly evaluating EMC test risk of whole vehicle |
| CN111208362A (en) * | 2019-12-05 | 2020-05-29 | 浙江合众新能源汽车有限公司 | Method and system for rapidly evaluating EMC test risk of whole vehicle |
| CN112698134A (en) * | 2020-12-21 | 2021-04-23 | 中国汽车工程研究院股份有限公司 | Whole vehicle electromagnetic self-compatibility risk diagnosis system and method based on global bus network |
| CN112698134B (en) * | 2020-12-21 | 2024-02-27 | 中国汽车工程研究院股份有限公司 | Whole vehicle electromagnetic self-compatibility risk diagnosis system and method based on global bus network |
| WO2022160572A1 (en) * | 2021-01-26 | 2022-08-04 | 浙江亚太机电股份有限公司 | Apparatus and method for measuring conducted emission current of ecu signal line |
| CN113484636A (en) * | 2021-06-22 | 2021-10-08 | 东风汽车集团股份有限公司 | Wire harness loop crosstalk prevention method and system based on unmanned system and storage medium |
| CN114675111A (en) * | 2022-03-31 | 2022-06-28 | 重庆长安新能源汽车科技有限公司 | Electromagnetic compatibility emission test system and method for all-in-one electric drive system |
| CN116953390A (en) * | 2023-07-01 | 2023-10-27 | 安徽博达项目管理咨询有限公司 | Data detection system for electromagnetic compatibility of optical cable pipeline |
| CN116953390B (en) * | 2023-07-01 | 2024-04-05 | 安徽博达项目管理咨询有限公司 | Data detection system for electromagnetic compatibility of optical cable pipeline |
| CN117538670A (en) * | 2024-01-10 | 2024-02-09 | 中国汽车技术研究中心有限公司 | Whole vehicle electromagnetic emission pre-test method and system |
| CN117538670B (en) * | 2024-01-10 | 2024-04-12 | 中国汽车技术研究中心有限公司 | Whole vehicle electromagnetic emission pre-test method and system |
| CN118330368A (en) * | 2024-04-30 | 2024-07-12 | 深圳阿尔法商品检验有限公司 | Electromagnetic compatibility safety test method and system for electric toy |
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Application publication date: 20171215 |