CN109660118A - The design method of the controllable rejection band electromagnetic interface filter of rail transit locomotive - Google Patents
The design method of the controllable rejection band electromagnetic interface filter of rail transit locomotive Download PDFInfo
- Publication number
- CN109660118A CN109660118A CN201811594488.XA CN201811594488A CN109660118A CN 109660118 A CN109660118 A CN 109660118A CN 201811594488 A CN201811594488 A CN 201811594488A CN 109660118 A CN109660118 A CN 109660118A
- Authority
- CN
- China
- Prior art keywords
- filter
- common mode
- rejection band
- differential mode
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H3/00—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Filters And Equalizers (AREA)
Abstract
The invention discloses a kind of design method of the controllable rejection band electromagnetic interface filter of rail transit locomotive, specifically: measure the vehicle electromagnetic interference emission frequency spectrum of rail transit locomotive；Determine the frequency of each wave crest respective frequencies point of filter switch group number N and electromagnetic interference frequency spectrum；Set the band filter coefficient of effect of controllable rejection band filter；Choose the differential mode inductance of controllable rejection band filter；Choose the common mode inductance of controllable rejection band filter；Obtain the common mode capacitance basic value of controllable rejection band filter；Obtain the common mode capacitance end value of controllable rejection band filter；Obtain the differential mode capacitor basic value of controllable rejection band filter；Obtain the differential mode capacitor end value of controllable rejection band filter；Determine the passband and stopband under controllable rejection band filter common-mode state.It can solve the problems, such as that EMI frequency band present in high-speed rail trailer system changes bad inhibition by this method.
Description
Technical field
The invention belongs to technical field of electromagnetic compatibility, are related to a kind of controllable rejection band EMI filtering of rail transit locomotive
The design method of device.
Background technique
With the continuous promotion of rail transit locomotive speed, the traction convertor in traction drive also shows greatly
Power densification development, the Conducted Electromagnetic Interference frequency spectrum of generation will more and more abundant and variation range it is wider, and EMI is filtered
Device is the effective means for inhibiting conducted EMI in traction legacy system.The traction convertor of rail transit locomotive is come
It says, with the variation of EMU running environment and region, its electromagnetic interference emission frequency band and amplitude can also change, but
It is that traditional simulation electromagnetic interface filter parameter fixation is immutable at present, and filter capacity is unadjustable, so, to this electromagnetic interference
Variation it is helpless.
Summary of the invention
The object of the present invention is to provide a kind of design method of the controllable rejection band electromagnetic interface filter of rail transit locomotive,
High-speed rail trailer system can be solved because working environment and place change cause EMI frequency band to change asking for bad inhibition by this method
Topic.
The technical solution adopted by the present invention is that the design method of the controllable rejection band electromagnetic interface filter of rail transit locomotive,
Specifically comprise the following steps:
Step 1, the vehicle electromagnetic interference emission frequency spectrum of rail transit locomotive is measured；
Step 2, filter switch group number N and electromagnetic interference frequency are determined according to the wave crest number n of the resulting emission spectrum of step 1
The frequency f (i) of each wave crest respective frequencies point of spectrum；
Step 3, the band filter coefficient of effect K (i) of controllable rejection band electromagnetic interface filter is set；
Step 4, the differential mode inductance L of controllable rejection band electromagnetic interface filter is chosendm；
Step 5, the common mode inductance L of controllable rejection band electromagnetic interface filter is chosencm；
Step 6, the common mode capacitance basic value C of controllable rejection band electromagnetic interface filter is obtainedCMB_i；
Step 7, the common mode capacitance end value C of controllable rejection band electromagnetic interface filter is obtainedCM_i；
Step 8, the differential mode capacitor basic value C of controllable rejection band electromagnetic interface filter is obtainedDMB_i；
Step 9, the differential mode capacitor end value C of controllable rejection band electromagnetic interface filter is obtainedDM_i；
Step 10, the passband and stopband under controllable rejection band electromagnetic interface filter common-mode state are determined.
The features of the present invention also characterized in that
The detailed process of step 2 is the wave crest number n of the electromagnetic interference frequency spectrum for the rail transit locomotive that observation of steps 1 are surveyed,
The switching group number N of filter is determined according to wave crest number, the relationship between n and N is as follows:
N=N (1)；
And the frequency f (i) of each wave crest respective frequencies point of available electromagnetic interference frequency spectrum, f (i) is in f1~fn
Between value, if interference spectrum medium wave peak number is less than 3, n takes 3.
Detailed process is as follows for step 3: defining band filter coefficient of effect K (i) by following formula (2)
Wherein, K (i) is the corresponding frequency band effect filter factor of i-th of peak frequencies point in frequency spectrum；
I is the variable of filtering frequency point variation in formula, its variation is from 1 to n；
AiFor the corresponding electromagnetic interference amplitude of i-th of peak frequencies point；
AmaxBy electromagnetic interference maximum amplitude in survey electromagnetic interference frequency spectrum；
AminBy electromagnetic interference minimum amplitude in survey electromagnetic interference frequency spectrum；
If wave crest number is less than or equal to 3, band filter coefficient of effect K (1)=K (2)=K (3)=1.
The detailed process of step 4 are as follows:
According to series inductance selection rule, then the differential mode inductance of controllable rejection band electromagnetic interface filter
In formula, Δ U is the permitted power voltage-drop of traction convertor, and f is line frequency；I is the specified work of traction convertor
Make electric current.
The detailed process of step 5 are as follows:
Left side input source impedance Z of the impedometer to access filterCM_SourceIt measures, surveys left side input source
Impedance ZCM_SourceConsist of two parts,
ZCM_Source=RCM_Source+jωLCM_Source(4)；
Wherein, RCM_SourceFor left side input side source impedance internal resistance,
LCM_SourceFor inductance in the input side source impedance of left side；
Common mode inductance LcmUsually choose common mode choke and access circuit, when the Criterion of Selecting of inductance value according to
Lcm=(10~80) LCM_Source (5)。
The detailed process of step 6 are as follows:
According to the corresponding frequency f (i) of crest frequency point all in frequency spectrum in step 2, common mode can be obtained by following formula (6)
Capacitor basic value CCMB_i:
Wherein, fiFor the crest frequency of i-th of peak frequencies point；
LcmFor common mode inductance；
CCMB_iThe basic value of common mode capacitance in switching group is corresponded to for required i-th of peak frequencies point.
The detailed process of step 7 are as follows: according to step 3 and step 6 acquired results, filter is asked by following formula (7)
Common mode capacitance end value CCM_i:
CCM_i=K (i) CCMB_i(7)；
Wherein, K (i) is the corresponding band filter coefficient of effect of i-th of peak frequencies point in frequency spectrum；
CCMB_iFor common mode capacitance basic value.
The detailed process of step 8 are as follows: according to the corresponding frequency f (i) of crest frequency point all in frequency spectrum in step 2, by
Formula (8) can obtain differential mode capacitor basic value CDMB_i:
Wherein, fiFor the crest frequency of i-th of peak frequencies point；
LdmFor differential mode inductance；
CDMB_iThe basic value of differential mode capacitor in switching group is corresponded to for required i-th of peak frequencies point.
The detailed process of step 9 are as follows:
According to step 3 and step 8 acquired results, the differential mode capacitor end value C of filter is sought by following formula (9)DM_i:
CDM_i=K (i) CDMB_i(9)；
Wherein, K (i) is the corresponding band filter coefficient of effect of i-th of peak frequencies point in frequency spectrum；
CDMB_iFor differential mode capacitor basic value.
The detailed process of step 10 are as follows:
The common mode capacitance end value C according to determined by step 7 and step 9CM_iAnd the differential mode electricity end value between L line N line
CDM_i, obtain passband, the stopband of common mode and the cutoff frequency sum of differential mode under each switch state of filter, the tool under common-mode state
Body calculation formula are as follows:
In formula, fcmIt (x) is the cutoff frequency of filter xth grade under common mode equivalent state (x changes in 1-n)；
LcmFor common mode inductance；
CCMEQFor the common mode equivalent capacitance of filter xth grade under common mode equivalent state；
Since each switching capacity group includes two common mode capacitances and uses parallel-connection structure in filter, therefore
CCMEQ=2CCM_i(11)；
Then under common mode equivalent state the passband stopband of xth grade by the calculated cutoff frequency f of institutecm(x) it divides,
In 9kHz -30MHz, 9kHz-fcmIt (x) is filter passband, fcm(x) -30MHz is filter stop bend；
Specific formula for calculation under differential mode state:
In formula, fdmIt (x) is the cutoff frequency of filter xth grade under differential mode equivalent state, x changes in 1-n；
LdmeqFor differential mode equivalent inductance, since there are two differential mode inductances in filter, therefore
Ldmeq=Ldm1+Ldm2(13)；
CDMEQFor the differential mode equivalent capacitance value of filter xth grade under differential mode equivalent state, since each is opened in filter
Closing capacitance group only includes a differential mode capacitor, therefore
CDMEQ=CDM_i(14)；
Then under differential mode equivalent state the passband stopband of xth grade by the calculated cutoff frequency f of institutedm(x) it divides,
In 9kHz -30MHz, 9kHz-fdmIt (x) is filter passband, fdm(x) -30MHz is filter stop bend, according to common mode and difference
The passband stopband of different series is different under mould state, to realize the adjustable inhibition of dynamic to entire electromagnetic interference frequency band.
The invention has the advantages that passing through the electromagnetic interference frequency spectrum medium wave peak number and each frequency of surveyed rail locomotive vehicle
The amplitude situation of rate point determines the filtering group number of filter so that it is determined that switching group number and resonant capacitance number.Solves high-speed rail
Frequency band caused by trailer system changes because of working environment and place changes, and traditional simulation electromagnetic interface filter is helpless to its
The problem of.By adjusting capacitance settings filtered band, it can dynamically inhibit electromagnetic interference, the external electromagnetism of high-speed rail trailer system can be reduced
The size of interference improves the reliability of whole system, reduces failure rate.
Detailed description of the invention
The design method middle orbit traffic locomotive of the controllable rejection band electromagnetic interface filter of Fig. 1 rail transit locomotive of the present invention
The Electromagnetic Interference Test spectrogram of vehicle；
Fig. 2 is handed over using the design method actual measurement track of the controllable rejection band electromagnetic interface filter of rail transit locomotive of the present invention
The Electromagnetic Interference Test spectrogram of logical locomotive whole-vehicle；
Fig. 3 is filtered using the controllable rejection band EMI of rail transit locomotive designed by design method proposed by the present invention
The topological diagram of device.
In figure, 1.L line, 2.N line, 3.PE line, 4. differential mode inductances one, 5. differential mode inductances two, 6. common mode inductances, 7. differential modes electricity
Rong Yi, 8. differential mode capacitor switches one, 9. common mode capacitances one, 10. common mode capacitance switches one, 11. common mode capacitances two, 12. differential modes electricity
Appearance two, 13. differential mode capacitor switches two, 14. common mode capacitances three, 15. common mode capacitance switches two, 16. common mode capacitances four, 17. differential modes
Capacitor three, 18. differential mode capacitor switches three, 19. common mode capacitances five, 20. common mode capacitance switches three, 21. common mode capacitances six, 22. open
Close capacitance group one, 23. switching capacity groups two, 24. switching capacity groups three.
Specific embodiment
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
A kind of design method of the controllable rejection band electromagnetic interface filter of rail transit locomotive of the present invention, specifically includes as follows
Step:
Step 1, the vehicle electromagnetic interference emission frequency spectrum of rail transit locomotive is measured；
Rail transit locomotive trailer system is tested with electromagnetic interference receiver and loop aerial, test method be
Loop aerial is placed at a distance apart from track 10m, and train can receive electromagnetic interference (EMI) emissions signal and is transferred to when passing through, on antenna
EMI receiver can obtain the vehicle electromagnetic interference emission frequency spectrum of tested rail transit locomotive, interference spectrum from EMI receiver
Including common mode interference and DM EMI, test results are shown in figure 1.
Step 2, filter switch group number N is determined, such as according to the electromagnetic interference frequency spectrum of rail transit locomotive surveyed in step 1
Shown in Fig. 1, the wave crest number n according to included in figure can determine filter switch capacitance group number N.How many wave crest in figure
Number n, then the switching group number N in filter is assured that, determines relationship are as follows:
N=N (1)；
And (f (i) is in f by the frequency f (i) of each available wave crest respective frequencies point1~fnBetween value).It is several
Scrambling spectrum medium wave peak number is less than 3, then n takes 3；I=1......n；
Step 3, the band filter coefficient of effect K (i) of controllable rejection band electromagnetic interface filter, common mode (differential mode) capacitor are set
When choosing, the situation of each wave crest amplitude is considered in the setting of capacitance, this situation band filter effect system considered
K (i) is counted to indicate, the band filter coefficient of effect of controllable rejection band electromagnetic interface filter is defined by the present invention as follows:
Wherein, K (i) is the corresponding frequency band effect filter factor of i-th of peak frequencies point in frequency spectrum；
I is the variable of filtering frequency point variation in formula, its variation is from 1 to n；
AiFor the corresponding electromagnetic interference amplitude of i-th of peak frequencies point；
AmaxBy electromagnetic interference maximum amplitude in survey electromagnetic interference frequency spectrum；
AminBy electromagnetic interference minimum amplitude in survey electromagnetic interference frequency spectrum；
If wave crest number is less than or equal to 3, band filter coefficient of effect K (1)=K (2)=K (3)=1.
Step 4, the differential mode inductance L of controllable rejection band electromagnetic interface filter is chosendm；
According to series inductance selection rule, then the differential mode inductance of controllable rejection band electromagnetic interface filter
In formula, Δ U is the permitted power voltage-drop of traction convertor, according to the traction working condition of rail transit locomotive, Δ U choosing
The 1% of traction convertor end of incoming cables voltage rating is taken as power voltage-drop；F is line frequency；I is traction convertor nominal operation
Electric current.
Step 5, the common mode inductance L of controllable rejection band electromagnetic interface filtercmSelection.
Left side input source impedance Z of the impedometer to access filterCM_SourceIt measures, surveys left side input source
Impedance ZCM_SourceConsist of two parts,
ZCM_Source=RCM_Source+jωLCM_Source(4)；
Wherein, RCM_SourceFor left side input side source impedance internal resistance,
LCM_SourceFor inductance in the input side source impedance of left side；
Common mode inductance LcmUsually choose common mode choke and access circuit, when the Criterion of Selecting of inductance value according to
Lcm=(10~80) LCM_Source(5)；
It is chosen, general multiple is between 10 to 80 times, and inductance value is usually the 3 μ H of μ H -5, for example, this method is designing
When can choose the common mode choke of 4 μ H as common mode inductance；
Step 6, the common mode capacitance basic value C of controllable rejection band electromagnetic interface filter is obtainedCMB_i；
Common mode capacitance basic value is when obtaining, according to the corresponding frequency f of crest frequency point all in frequency spectrum in step 2
(i), common mode capacitance basic value C can be obtained by following formula (6)CMB_i:
Wherein, fiFor the crest frequency of i-th of peak frequencies point；
LcmFor common mode inductance；
CCMB_iThe basic value of common mode capacitance in switching group is corresponded to for required i-th of peak frequencies point.
Step 7, the common mode capacitance end value C of controllable rejection band electromagnetic interface filter is obtainedCM_i, common mode capacitance is being determined
Basic value CCMB_iAfterwards, according to the obtained band filter coefficient of effect K (i) of step 3, the common mode capacitance of filter can be obtained most
Final value CCM_i:
CCM_i=K (i) CCMB_i(7)；
Wherein, K (i) is the corresponding band filter coefficient of effect of i-th of peak frequencies point in frequency spectrum；
CCMB_iFor common mode capacitance basic value；
After determining to capacitance, select pressure resistance for 4000V, choosing series is the thin-film capacitor of CY-2 as in filter
Common mode capacitance.
Step 8, the differential mode capacitor basic value C of controllable rejection band electromagnetic interface filter is obtainedDMB_i；Differential mode capacitor basic value exists
When acquisition, according to the corresponding frequency f (i) of crest frequency point all in frequency spectrum in step 2, differential mode capacitor can be obtained by formula (8)
Basic value CDMB_i:
Wherein, fiFor the crest frequency of i-th of peak frequencies point；
LdmFor differential mode inductance；
CDMB_iThe basic value of differential mode capacitor in switching group is corresponded to for required i-th of peak frequencies point.
Step 9, the differential mode capacitor end value C of controllable rejection band electromagnetic interface filter is obtainedDM_i, differential mode capacitor is being determined
Basic value CDMB_iAfterwards, according to the obtained band filter coefficient of effect K (i) of step 3, the differential mode capacitor of filter can be obtained
End value CDM_i, calculation formula are as follows:
CDM_i=K (i) CDMB_i(9)；
Wherein, K (i) is the corresponding band filter coefficient of effect of i-th of peak frequencies point in frequency spectrum；
CDMB_iFor differential mode capacitor basic value.
After determining to capacitance, select pressure resistance for 4000V, choosing series is the thin-film capacitor of CY-2 as in filter
Differential mode capacitor.
Step 10, the passband and stopband under controllable rejection band electromagnetic interface filter common-mode state are determined；
The common mode capacitance end value C according to determined by step 7 and step 9CM_iAnd the differential mode electricity end value between L line N line
CDM_i, obtain passband, the stopband of common mode and the cutoff frequency sum of differential mode under each switch state of filter, the tool under common-mode state
Body calculation formula are as follows:
In formula, fcmIt (x) is the cutoff frequency of filter xth grade under common mode equivalent state (x changes in 1-n)；
LcmFor common mode inductance；
CCMEQFor the common mode equivalent capacitance of filter xth grade under common mode equivalent state, since each is opened in filter
Capacitance group is closed to include two common mode capacitances and use parallel-connection structure, therefore
CCMEQ=2CCM_i(11)；
Then under common mode equivalent state the passband stopband of xth grade by the calculated cutoff frequency f of institutecm(x) it divides,
In 9kHz -30MHz, 9kHz-fcmIt (x) is filter passband, fcm(x) -30MHz is filter stop bend.
Specific formula for calculation under differential mode state:
In formula, fdmIt (x) is the cutoff frequency of filter xth grade under differential mode equivalent state (x changes in 1-n)；LdmeqFor difference
Mould equivalent inductance, since there are two differential mode inductances in filter, therefore
Ldmeq=Ldm1+Ldm2(13)；
CDMEQFor the differential mode equivalent capacitance value of filter xth grade under differential mode equivalent state, since each is opened in filter
Closing capacitance group only includes a differential mode capacitor, therefore
CDMEQ=CDM_i(14)；
Then under differential mode equivalent state the passband stopband of xth grade by the calculated cutoff frequency f of institutedm(x) it divides,
In 9kHz -30MHz, 9kHz-fdmIt (x) is filter passband, fdm(x) -30MHz is filter stop bend.According to common mode and difference
The passband stopband of different series is different under mould state, to realize the adjustable inhibition of dynamic to entire electromagnetic interference frequency band.
According to a kind of above design side of the controllable rejection band electromagnetic interface filter of rail transit locomotive proposed by the present invention
Method enumerates example now to design a kind of controllable rejection band electromagnetic interface filter example of rail transit locomotive.
According to the vehicle electromagnetic interference emission frequency spectrum of the actual measurement rail transit locomotive of the available such as Fig. 2 of step 1, seen in figure
There are three interfere wave crest, i.e. n=3 out；
The switching group number in filter access circuit can be determined according to step 2, then the switching group number N=n=of filter
3.And the corresponding Frequency point of three wave crests is f (1)=1.2MHz, f (2)=13.5MHz, f (3)=27MHz；
According to step 3 it is found that wave crest number be less than or equal to 3 when, then band filter coefficient of effect K (1)=K (2)=K (3)=
1, that is, it can determine filter effect coefficient；
According to step 4, the differential mode inductance L of available controllable rejection band electromagnetic interface filterdm, value is 11.25 μ
H.Then, one L of differential mode inductancedm1And two L of differential mode inductancedm2Taking inductance value is 11.25 μ H.
According to step 5, the common mode inductance L of controllable rejection band electromagnetic interface filter can be determinedcmFor 4 μ H.
It can determine the common mode capacitance basic value C of controllable rejection band electromagnetic interface filter according to step 6CMB_i, wherein i=1,2,
3, then common mode capacitance basic value CCMB_1=4355pF, CCMB_2=40pF, CCMB_3=5pF；Because of filter effect COEFFICIENT K (1)=K (2)
=K (3)=1, therefore the common mode capacitance end value C of controllable rejection band electromagnetic interface filter can be determined according to step 7CM_i, wherein i=
1,2,3, then common mode capacitance end value CCM1=4355pF, CCM2=40pF, CCM3=5pF.Due to selecting in one group of switching capacity group
Two equal common mode capacitances of capacitance are taken to be connected into circuit, then the three groups of common mode capacitances accessed in circuit are CCM11=CCM12=
4355pF、CCM21=CCM22=40pF, CCM31=CCM32=5PF.
It can determine the differential mode capacitor basic value C of controllable rejection band electromagnetic interface filter according to step 8DMB_i, wherein i=1,2,
3, then differential mode capacitor basic value CDMB_1=1800pF, CCMB_2=18pF, CCMB_3=2pF；Because of filter effect COEFFICIENT K (1)=K (2)
=K (3)=1, therefore the differential mode capacitor end value C of controllable rejection band electromagnetic interface filter can be determined according to step 9CM_i, wherein i=
1,2,3, then differential mode capacitor end value CDM1=1800pF, CDM2=18pF, CDM3=2pF；
The cutoff frequency of the different series under common-mode state, specially f can be calculated according to step 10cm(1)=
852kHz、fcm(2)=6.2MHz, fcm(3)=25.2MHz；Then in 9kHz -30MHz frequency range, 9kHz -852kHz, 9kHz-
6.2MHz, 9kHz-25.2MHz are the passband of filter, and 852kHz-30MHz, 6.2MHz-30MHz, 25.2MHz-30MHz are filter
The stopband of wave device；
And the cutoff frequency of the different series under differential mode state, specially fcm(1)=791kHz, fcm(2)=
7.9MHz、fcm(3)=23.7MHz；Then in 9kHz -30MHz frequency range, 9kHz -791kHz, 9kHz-7.9MHz, 9kHz-
23.7MHz is the passband of filter, and 791kHz-30MHz, 7.9MHz-30MHz, 23.7MHz-30MHz are the stopband of filter；
According to step described in method, the controllable rejection band electromagnetic interface filter example design of rail transit locomotive is completed.
Referring to Fig. 3, the controllable rejection band EMI of rail transit locomotive designed by design method proposed by the present invention is used
The topological diagram of filter is three including access device input line, respectively L line 1, N line 2 and PE line 3, is provided on L line 1
One 4 (L of differential mode inductancedm1), 25 (L of differential mode inductance is provided on N line 2dm2), common mode choke 6 is connected between L line 1 and N line 2
(Lcm)；The inductance value of differential mode inductance 1 and differential mode inductance 25 and common mode choke 6 remains unchanged, in the ginseng of example filter
In number design, the inductance value that common mode choke 6 is chosen is 4 μ H, and the inductance value that differential mode inductance 1 and differential mode inductance 25 are chosen is equal
For 11.25 μ H；
The upper output end of common mode choke 6 and lower output end are parallel with three groups of differential mode capacitor groups, in each differential mode capacitor group
Including a differential mode capacitor and a differential mode capacitor switch；The upper output end of common mode choke 6 and lower output end in addition with PE line 3
Between be parallel with three groups of common mode capacitance groups, include two common mode capacitances and a common mode capacitance switch in each common mode capacitance group；
Each differential mode capacitor group is corresponded with a common mode capacitance group is known as one group of capacitance switch, and three groups of capacitance switch of embodiment are specific
Connection structure is:
In switching capacity group 1, L line 1 passes through one 7 (C of differential mode capacitorDM1) and one 8 (S of differential mode capacitor switchd1) and N line 2
Connection；PE line 3 and one 10 (S of common mode capacitance switchc1) connect, one 10 other end of common mode capacitance switch is connected with common mode capacitance simultaneously
One 9 (CCM11, N line common mode capacitance over the ground) and 2 11 (C of common mode capacitanceCM12, L line common mode capacitance over the ground), common mode capacitance 1 is another
It terminates into N line 2,2 11 other end of common mode capacitance accesses L line 1；
Equally, in switching capacity group 2 23, L line 1 passes through 2 12 (C of differential mode capacitorDM2) and 2 13 (S of differential mode capacitor switchd2)
It is connect with N line 2；PE line 3 and 2 15 (S of common mode capacitance switchc2) connection, 2 15 other end of common mode capacitance switch is connected with total simultaneously
3 14 (C of mould capacitorCM21, N line common mode capacitance over the ground) and 4 16 (C of common mode capacitanceCM22, L line common mode capacitance over the ground), common mode capacitance
3 14 other ends access N line 2, and 4 16 other end of common mode capacitance accesses L line 1；
Equally, in switching capacity group 3 24, L line 1 passes through 3 17 (C of differential mode capacitorDM3) and 3 18 (S of differential mode capacitor switchd3)
It is connect with N line 2；PE line 3 and 3 20 (S of common mode capacitance switchc3) connection, 3 20 other end of common mode capacitance switch is connected with total simultaneously
5 19 (C of mould capacitorCM31, N line common mode capacitance over the ground) and 6 21 (C of common mode capacitanceCM32, L line common mode capacitance over the ground), common mode capacitance
5 19 other ends access N line 2, and 6 21 other end of common mode capacitance accesses L line 1.
Claims (10)
1. the design method of the controllable rejection band electromagnetic interface filter of rail transit locomotive, it is characterised in that: specifically include following step
It is rapid:
Step 1, the vehicle electromagnetic interference emission frequency spectrum of rail transit locomotive is measured；
Step 2, filter switch group number N and electromagnetic interference frequency spectrum are determined according to the wave crest number n of the resulting emission spectrum of step 1
The frequency f (i) of each wave crest respective frequencies point；
Step 3, the band filter coefficient of effect K (i) of controllable rejection band electromagnetic interface filter is set；
Step 4, the differential mode inductance L of controllable rejection band electromagnetic interface filter is chosendm；
Step 5, the common mode inductance L of controllable rejection band electromagnetic interface filter is chosencm；
Step 6, the common mode capacitance basic value C of controllable rejection band electromagnetic interface filter is obtainedCMB_i；
Step 7, the common mode capacitance end value C of controllable rejection band electromagnetic interface filter is obtainedCM_i；
Step 8, the differential mode capacitor basic value C of controllable rejection band electromagnetic interface filter is obtainedDMB_i；
Step 9, the differential mode capacitor end value C of controllable rejection band electromagnetic interface filter is obtainedDM_i；
Step 10, the passband and stopband under controllable rejection band electromagnetic interface filter common-mode state are determined.
2. the design method of the controllable rejection band electromagnetic interface filter of rail transit locomotive according to claim 1, feature
Be: the detailed process of the step 2 is the wave crest number of the electromagnetic interference frequency spectrum for the rail transit locomotive that observation of steps 1 are surveyed
N determines the switching group number N of filter according to wave crest number, and the relationship between n and N is as follows:
N=N (1)；
And the frequency f (i) of each wave crest respective frequencies point of available electromagnetic interference frequency spectrum, f (i) is in f1~fnBetween
Value, if interference spectrum medium wave peak number is less than 3, n takes 3.
3. the design method of the controllable rejection band electromagnetic interface filter of rail transit locomotive according to claim 2, feature
Be: detailed process is as follows for the step 3: defining band filter coefficient of effect K (i) by following formula (2)
Wherein, K (i) is the corresponding frequency band effect filter factor of i-th of peak frequencies point in frequency spectrum；
I is the variable of filtering frequency point variation in formula, its variation is from 1 to n；
AiFor the corresponding electromagnetic interference amplitude of i-th of peak frequencies point；
AmaxBy electromagnetic interference maximum amplitude in survey electromagnetic interference frequency spectrum；
AminBy electromagnetic interference minimum amplitude in survey electromagnetic interference frequency spectrum；
If wave crest number is less than or equal to 3, band filter coefficient of effect K (1)=K (2)=K (3)=1.
4. the design method of the controllable rejection band electromagnetic interface filter of rail transit locomotive according to claim 3, feature
It is: the detailed process of the step 4 are as follows:
According to series inductance selection rule, then the differential mode inductance of controllable rejection band electromagnetic interface filter
In formula, Δ U is the permitted power voltage-drop of traction convertor, and f is line frequency；I is traction convertor nominal operation electricity
Stream.
5. the design method of the controllable rejection band electromagnetic interface filter of rail transit locomotive according to claim 4, feature
It is: the detailed process of the step 5 are as follows:
Left side input source impedance Z of the impedometer to access filterCM_SourceIt measures, surveys left side and input source impedance
ZCM_SourceConsist of two parts,
ZCM_Source=RCM_Source+jωLCM_Source(4)；
Wherein, RCM_SourceFor left side input side source impedance internal resistance,
LCM_SourceFor inductance in the input side source impedance of left side；
Common mode inductance LcmUsually choose common mode choke and access circuit, when the Criterion of Selecting of inductance value according to
Lcm=(10~80) LCM_Source (5)。
6. the design method of the controllable rejection band electromagnetic interface filter of rail transit locomotive according to claim 5, feature
It is: the detailed process of the step 6 are as follows:
According to the corresponding frequency f (i) of crest frequency point all in frequency spectrum in step 2, common mode capacitance can be obtained by following formula (6)
Basic value CCMB_i:
Wherein, fiFor the crest frequency of i-th of peak frequencies point；
LcmFor common mode inductance；
CCMB_iThe basic value of common mode capacitance in switching group is corresponded to for required i-th of peak frequencies point.
7. the design method of the controllable rejection band electromagnetic interface filter of rail transit locomotive according to claim 6, feature
It is: the detailed process of the step 7 are as follows: according to step 3 and step 6 acquired results, filter is asked by following formula (7)
Common mode capacitance end value CCM_i:
CCM_i=K (i) CCMB_i(7)；
Wherein, K (i) is the corresponding band filter coefficient of effect of i-th of peak frequencies point in frequency spectrum；
CCMB_iFor common mode capacitance basic value.
8. the design method of the controllable rejection band electromagnetic interface filter of rail transit locomotive according to claim 7, feature
It is: the detailed process of the step 8 are as follows: according to the corresponding frequency f (i) of crest frequency point all in frequency spectrum in step 2, by
Formula (8) can obtain differential mode capacitor basic value CDMB_i:
Wherein, fiFor the crest frequency of i-th of peak frequencies point；
LdmFor differential mode inductance；
CDMB_iThe basic value of differential mode capacitor in switching group is corresponded to for required i-th of peak frequencies point.
9. the design method of the controllable rejection band electromagnetic interface filter of rail transit locomotive according to claim 8, feature
It is: the detailed process of the step 9 are as follows:
According to step 3 and step 8 acquired results, the differential mode capacitor end value C of filter is sought by following formula (9)DM_i:
CDM_i=K (i) CDMB_i(9)；
Wherein, K (i) is the corresponding band filter coefficient of effect of i-th of peak frequencies point in frequency spectrum；
CDMB_iFor differential mode capacitor basic value.
10. the design method of the controllable rejection band electromagnetic interface filter of rail transit locomotive according to claim 9, special
Sign is: the detailed process of the step 10 are as follows:
The common mode capacitance end value C according to determined by step 7 and step 9CM_iAnd the differential mode electricity end value C between L line N lineDM_i,
Obtain passband, the stopband of common mode and the cutoff frequency sum of differential mode under each switch state of filter, the specific meter under common-mode state
Calculate formula are as follows:
In formula, fcmIt (x) is the cutoff frequency of filter xth grade under common mode equivalent state (x changes in 1-n)；
LcmFor common mode inductance；
CCMEQFor the common mode equivalent capacitance of filter xth grade under common mode equivalent state；
Since each switching capacity group includes two common mode capacitances and uses parallel-connection structure in filter, therefore
CCMEQ=2CCM_i(11)；
Then under common mode equivalent state the passband stopband of xth grade by the calculated cutoff frequency f of institutecm(x) it divides, in 9kHz-
In 30MHz, 9kHz-fcmIt (x) is filter passband, fcm(x) -30MHz is filter stop bend；
Specific formula for calculation under differential mode state:
In formula, fdmIt (x) is the cutoff frequency of filter xth grade under differential mode equivalent state,
X changes in 1-n；
LdmeqFor differential mode equivalent inductance, since there are two differential mode inductances in filter, therefore
Ldmeq=Ldm1+Ldm2(13)；
CDMEQFor the differential mode equivalent capacitance value of filter xth grade under differential mode equivalent state, due to each switching capacity in filter
Group only includes a differential mode capacitor, therefore
CDMEQ=CDM_i(14)；
Then under differential mode equivalent state the passband stopband of xth grade by the calculated cutoff frequency f of institutedm(x) it divides, in 9kHz-
In 30MHz, 9kHz-fdmIt (x) is filter passband, fdm(x) -30MHz is filter stop bend, according to common mode and differential mode state
The passband stopband of lower difference series is different, to realize the adjustable inhibition of dynamic to entire electromagnetic interference frequency band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811594488.XA CN109660118B (en) | 2018-12-25 | 2018-12-25 | Design method of controllable frequency band-suppression EMI filter of rail transit locomotive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811594488.XA CN109660118B (en) | 2018-12-25 | 2018-12-25 | Design method of controllable frequency band-suppression EMI filter of rail transit locomotive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109660118A true CN109660118A (en) | 2019-04-19 |
| CN109660118B CN109660118B (en) | 2020-05-22 |
Family
ID=66116669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811594488.XA Active CN109660118B (en) | 2018-12-25 | 2018-12-25 | Design method of controllable frequency band-suppression EMI filter of rail transit locomotive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109660118B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111027268A (en) * | 2019-10-21 | 2020-04-17 | 珠海格力电器股份有限公司 | Circuit for simulating common mode choke coil |
| CN111697817A (en) * | 2020-06-18 | 2020-09-22 | 中车长春轨道客车股份有限公司 | Anti-electromagnetic interference device of motor train unit inverter |
| CN113595380A (en) * | 2021-08-30 | 2021-11-02 | 京东方科技集团股份有限公司 | EMC debugging filter board card of electronic equipment and debugging method |
| CN115800703A (en) * | 2023-01-31 | 2023-03-14 | 西安华创马科智能控制系统有限公司 | Power supply voltage ripple eliminating device and power supply voltage ripple eliminating method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104270002A (en) * | 2014-10-25 | 2015-01-07 | 哈尔滨理工大学 | Passive suppression method for conducted electromagnetic interface of PWM (power width modulation) power converter |
| CN108694284A (en) * | 2018-05-15 | 2018-10-23 | 深圳大学 | Computational methods, system, equipment and the storage medium of the parameter of filter |
-
2018
- 2018-12-25 CN CN201811594488.XA patent/CN109660118B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104270002A (en) * | 2014-10-25 | 2015-01-07 | 哈尔滨理工大学 | Passive suppression method for conducted electromagnetic interface of PWM (power width modulation) power converter |
| CN108694284A (en) * | 2018-05-15 | 2018-10-23 | 深圳大学 | Computational methods, system, equipment and the storage medium of the parameter of filter |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111027268A (en) * | 2019-10-21 | 2020-04-17 | 珠海格力电器股份有限公司 | Circuit for simulating common mode choke coil |
| CN111027268B (en) * | 2019-10-21 | 2022-04-15 | 珠海格力电器股份有限公司 | Circuit for simulating common mode choke coil |
| CN111697817A (en) * | 2020-06-18 | 2020-09-22 | 中车长春轨道客车股份有限公司 | Anti-electromagnetic interference device of motor train unit inverter |
| CN111697817B (en) * | 2020-06-18 | 2023-05-12 | 中车长春轨道客车股份有限公司 | Electromagnetic interference resistant device of motor train unit inverter |
| CN113595380A (en) * | 2021-08-30 | 2021-11-02 | 京东方科技集团股份有限公司 | EMC debugging filter board card of electronic equipment and debugging method |
| CN115800703A (en) * | 2023-01-31 | 2023-03-14 | 西安华创马科智能控制系统有限公司 | Power supply voltage ripple eliminating device and power supply voltage ripple eliminating method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109660118B (en) | 2020-05-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109660118A (en) | The design method of the controllable rejection band electromagnetic interface filter of rail transit locomotive | |
| CN102005739B (en) | Method for identifying extra-high voltage direct current transmission line area inside and outside fault wavelet energy | |
| CN102005740A (en) | Extra-high voltage direct current line boundary element method adopting polar wave wavelet energy ratio | |
| CN203968079U (en) | A kind of ultrabroad band bounce frequency filter | |
| CN105738764A (en) | Power distribution network faulty section positioning method based on transient information full frequency band | |
| CN104502755B (en) | Gaussian even pulse high-current high-power broadband power line injection coupling network and construction method thereof | |
| CN110572024A (en) | EMI power filter | |
| CN107612865A (en) | A kind of signal de-noising method applied to low-voltage powerline carrier communication | |
| CN104201590B (en) | A kind of method suppressing GIS internal high frequency Conduction Interference | |
| CN109560786B (en) | High-speed rail traction system step-by-step regulation and control frequency band suppression EMI filter and design method | |
| CN113514735A (en) | Anti-interference high-voltage transformer bushing partial discharge online monitoring method | |
| CN104502861A (en) | Gaussian even pulse high-current high-power broadband power wire injection coupling network and construction method thereof | |
| CN105024734B (en) | Suppress the method and its system of power information acquisition system interference signal | |
| CN105207646B (en) | The very big design method of minimization of alternating DFT modulated filter groups | |
| CN203950012U (en) | Switch cubicle partial simulation discharging detection device | |
| CN110719122A (en) | Automatic impedance matching method based on improved PSO algorithm | |
| Kotny et al. | Design of EMI filters for DC-DC converter | |
| CN209267431U (en) | A kind of controllable rejection band electromagnetic interface filter of power transformation appearance for EMU | |
| CN108259021A (en) | A kind of CMOS broadbands distribution variable band-pass filter | |
| CN105244572B (en) | A kind of filter design method based on Chebyshev's impedance transformer network technology | |
| CN210376503U (en) | Capacitive voltage divider low pressure measuring circuit | |
| CN205509990U (en) | CMOS power amplifier matching circuit | |
| CN204859178U (en) | System for restrain power consumption information collection system interfering signal | |
| CN210867500U (en) | EMI power filter | |
| CN106982041A (en) | The method that any power ratio output is carried out using 180 ° of ring-shape bridge novel topological structures of lumped parameter design and using it |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211118 Address after: 712000 room 025, F2002, 20 / F, block 4-A, Xixian financial port, Fengdong new town energy Jinmao District, Xixian New District, Xi'an City, Shaanxi Province Patentee after: Shaanxi cirongchuang electronic and Electrical Co.,Ltd. Address before: 710048 No. 5 Jinhua South Road, Shaanxi, Xi'an Patentee before: XI'AN University OF TECHNOLOGY |