EP3769410A1 - Emv-filteranordnung - Google Patents
Emv-filteranordnungInfo
- Publication number
- EP3769410A1 EP3769410A1 EP19742192.8A EP19742192A EP3769410A1 EP 3769410 A1 EP3769410 A1 EP 3769410A1 EP 19742192 A EP19742192 A EP 19742192A EP 3769410 A1 EP3769410 A1 EP 3769410A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- current
- emc filter
- capacitance
- filter arrangement
- compensation
- 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.)
- Pending
Links
- 239000004020 conductor Substances 0.000 claims abstract description 115
- 239000003990 capacitor Substances 0.000 claims description 37
- 230000001629 suppression Effects 0.000 claims description 20
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 230000001939 inductive effect Effects 0.000 claims description 7
- 230000007935 neutral effect Effects 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 abstract 1
- 238000004088 simulation Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
- H03H1/0007—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network of radio frequency interference filters
-
- 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
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- 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
- H02M1/14—Arrangements for reducing ripples from dc input or output
-
- 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
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/42—Networks for transforming balanced signals into unbalanced signals and vice versa, e.g. baluns
- H03H7/425—Balance-balance networks
- H03H7/427—Common-mode filters
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
- H03H2001/0021—Constructional details
- H03H2001/0035—Wound magnetic core
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
- H03H2001/0021—Constructional details
- H03H2001/0057—Constructional details comprising magnetic material
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
- H03H2001/0092—Inductor filters, i.e. inductors whose parasitic capacitance is of relevance to consider it as filter
Definitions
- the present invention relates to an EMC filter arrangement which comprises two current-carrying conductor tracks which connect a first capacitance, a first compensation conductor loop, a second capacitance and a second compensation conductor loop in such a way that the inductive coupling between the capacitances is reduced , with simultaneous minimal asymmetry in the individual phases (L / N).
- an EMC filter arrangement which comprises two current-carrying conductor tracks which connect a first capacitance, a first compensation conductor loop, a second capacitance and a second compensation conductor loop to one another in a ballast.
- the components are arranged in such a way that the inductive coupling between the capacitors is reduced.
- the second Compensating conductor loop By using the second Compensating conductor loop, the inductive coupling is compensated by the second capacitance in differential mode.
- the two compensation conductor loops each create a magnetic field, which add up to a new resulting magnetic field.
- This resulting magnetic field is spatially more widely distributed than the magnetic field with only one compensation conductor loop, counteracts or counteracts one component against the magnetic field of the second capacitance, so that the two magnetic fields ideally cancel each other out.
- the resulting magnetic field of the two compensation conductor loops counteracts or with one component counteracts the magnetic field and creates symmetrical conditions in the filter. Reverse current supply to the stirrups reverses the mode of operation in the same and the push-pull mode.
- the EMC filter arrangement is preferably designed such that the first current-carrying conductor track is a neutral conductor and the second current-carrying conductor track is a phase conductor.
- the first compensation conductor loop is provided on one of the two lines and is connected between the first capacitance and the second capacitance.
- an embodiment is favorable in which the second compensation conductor loop is provided on the line, on which the first compensation conductor loop is not provided, is connected between the first capacitance and the second capacitance and runs in parallel to the first compensation conductor loop.
- the resulting magnetic fields are optimally overlaid with those of the capacitors due to the parallel arrangement of the two conductor loops. Due to the arrangement of the two Kompensationslei loops between the first and the second capacitance, an optimal effect of the resulting magnetic fields is counteracted or with a compo- against the magnetic fields of the second capacitance in push-pull and the first capacitance in common mode. Furthermore, the EMC filter structure with a second compensation conductor loop improves the filter properties, since a conversion from common mode to push mode interference or from push mode to common mode interference is avoided. In common mode, for example, a smaller current flows through the compensation conductor loop than through the uncompensated path due to the asymmetry of the filter structure.
- the first compensation conductor loop is arranged in such a way that the current flow direction through the first compensation conductor loop runs parallel to the current flow direction or a component runs parallel to the current flow direction through the two capacitances. In this way, the resulting magnetic fields of the compensation conductor loops act in the best possible way against the magnetic fields of the first and second capacitors.
- the current flow direction in the compensation conductor loop runs counter to or with one component counter to the current flow direction through the second capacitance.
- the result of the compensation conductor loops is a resulting magnetic field which counteracts the magnetic field of the second capacitance.
- the EMC filter arrangement according to the invention is designed such that during a common-mode current operation, the direction of current flow in the compensation conductor loop runs counter to or with one component against the current flow direction through the first capacitor.
- the result of the compensation conductor loops is a resulting magnetic field that counteracts the magnetic field of the first capacitance.
- the first capacitance is formed from two Y interference suppression capacitors and the one Y interference suppression capacitor is connected to the second current-carrying conductor tracks and a ground and the other Y interference suppression capacitor is connected to the first current-carrying conductor path and a ground ,
- the second capacitance is an X interference suppression capacitor which is arranged between the first current-carrying conductor track and the second current-carrying conductor track.
- the two compensation conductor loops are designed as a printed circuit board. This reduces the assembly effort and favors the handling of the EMC filter, since electrical components are assembled on printed circuit boards as standard and the compensation conductor bracket can thus be integrated without considerable additional effort. Furthermore, the stability of the compensation conductor loop is increased and thus the service life of the EMC filter
- the two compensation conductor loops are designed in the form of at least one or more wire loops.
- the one or more wire loops form the smallest unit of a current-carrying coil for generating a magnetic field. This is advantageous with an EMC filter, since many electronic devices are in who use an EMC filter are small devices with little installation space. This limits the size of an EMC filter and thus also the installation space for the compensation conductor loops.
- a common mode choke and a third capacitance are connected in series to the second capacitance. This further improves the properties of the EMC filter.
- the EMC filter arrangement according to the invention is designed in such a way that the third capacitance is an X interference suppression capacitor, which is arranged between the first current-carrying conductor track and the second current-carrying conductor track and has a current flow direction which is equal to the current flow direction of the second capacitance.
- the third capacity further optimizes the filter properties of the EMC filter. Due to the direction of current flow, the resulting magnetic field has the same orientation as the magnetic field of the second capacitance and these overlap. The resulting magnetic field of the compensation conductor loops thus optimally counteracts or with one component counteracts the resulting magnetic field of the second and third capacitors.
- the current-carrying conductor tracks are provided between the two Y interference suppression capacitors.
- the Y interference suppression capacitors are provided between the two current-carrying conductor tracks.
- the direction of current flow in the two compensation conductor loops changes and thus also the direction of the resulting magnetic field or the sign of the compensation. It is beneficial that the EMC filter can be whose applications can be adapted and the area of application of the EMC filter is wider.
- Fig. 1 is a schematic view of an EMC filter with two compensation conductor loops, two Y capacitors and an X capacitor
- Fig. 2 is a schematic view of an EMC filter with current conducting tracks between the Y capacitors and an EMC filter Y capacitors between the current conducting tracks
- FIG. 3 shows a system circuit diagram of an EMC filter in push-pull mode
- FIG. 4 shows a system circuit diagram of an EMC filter in common mode
- FIG. 5 compares the system circuit diagrams of an EMC filter with one and with two compensation conductor loops in common mode
- FIG. 6 simulation results of a DMTR determination (differential mode transmission ratio)
- FIG. 7 simulation results of a CMTR determination (common mode transmission ratio)
- FIG. 1 shows a schematic view of an EMC filter with two compensation conductor loops 3, 7, two Y capacitors 8 and an X capacitor 9.
- the two current conducting tracks 5, 6 connect the aforementioned components in a ballast. Furthermore, the current-carrying conductor tracks 5, 6 are provided between the two Y-interference suppression capacitors 8 and the X-interference suppression capacitor 9 is arranged between the two current-carrying conductor tracks 5, 6.
- the first Kom pensationsleiterschleife 3 is connected to the phase conductor 6 and the second Kom pensationsleiterschleife 7 to the neutral conductor 5.
- Both compensation conductor loops 3, 7 are connected between the first capacitance and the second capacitance and run parallel to one another. Furthermore, the two compensation conductor loops 3, 7 are arranged such that the direction of current flow through the compensation conductor loops 3, 7 runs parallel to the direction of current flow or a component parallel to the direction of current flow through the two capacitors.
- FIG. 2 shows a schematic view of an EMC filter with current-carrying conductor tracks between the Y capacitors 8 and an EMC filter with Y capacitors 8 between the current-carrying conductor tracks 5, 6.
- FIG. be 11 and another third capacity connected in series. Otherwise, the structure of Figure 1 (right part of Figure 2) is the same.
- FIG 3 a system diagram of an EMC filter of Figure 2 is shown in the counter clock.
- the two compensation conductor loops 3, 7 are of their flows through the respective currents in the same direction and the resulting magnetic fields add up to form a new resulting magnetic field. Since the currents through the two X capacitors 9 flow in the opposite direction compared to the currents in the compensation conductor loops 3, 7, the resulting magnetic field of the compensation conductor loops 3, 7 counteracts the resulting magnetic field of the X interference suppression capacitors 9 and Ideally, magnetic fields cancel each other out.
- FIG. 4 shows a system circuit diagram of an EMC filter from FIG. 2 in common mode.
- the two compensation conductor loops 3, 7 are traversed by their respective currents in the same direction, and the magnetic fields that arise add up to a new resulting magnetic field. Since the currents through the two Y capacitors 8 flow in the opposite direction compared to the currents in the compensation conductor loops 3, 7, the resulting magnetic field of the compensation conductor loops 3, 7 counteracts the resulting magnetic fields of the Y interference suppression capacitors 8 and the magnetic fields rise ideally on.
- FIG. 5 is a comparison of the system circuit diagrams of an EMC filter with one and with two compensation conductor loops in common mode (in the right and left view in each case).
- the arrangement with two compensation conductor loops 3, 7 flow through the two current-carrying conductor tracks 5, 6 Currents of the same phase.
- a smaller current flows through the non-compensated path of the EMC filter due to the asymmetry.
- FIG. 6 shows the fleas of the differential mode transmission ratio (DMTR) in dB.
- the DMTR is the ratio of the push-pull voltage specified on the filter to the push-pull voltage measured on the network simulation and reduced by the EMC filter.
- the two compensation conductor loops 3, 7 achieve a significant reduction in the push-pull voltage in the higher frequency range, which is the primary goal of the compensation conductor loops 3, 7. It can also be seen that there are only minimal differences between the simple and the two compensation conductor loops 3, 7.
- FIG. 7 shows the level of the common mode transmission ratio (CMTR) in dB.
- CMTR common mode transmission ratio
- the CMTR is the ratio of the common mode voltage specified on the filter to the common mode voltage measured on the network simulation and reduced by the EMC filter. In this case, the three EMC filter variants show no significant differences.
- FIG. 8 shows the level of the common mode rejection ratio in dB.
- the CMRR is the ratio of the common mode voltage specified on the filter to the differential mode voltage measured on the network simulation and reduced by the filter. Due to the asymmetry when using a compensation conductor loop 3, 7, an increased conversion from common mode voltage to push-pull voltage occurs in the EMC filter. If no compensation conductor loops 3, 7 are used or two compensation conductor loops 3, 7 in a symmetrical design, significantly lower values for the CMRR are achieved. Thus, the deterioration caused by the simple compensation conductor loop 3, 7 is largely compensated for.
- FIG. 9 shows the level of the differential mode rejection ratio in dB.
- the DMRR is the ratio of the push-pull voltage specified on the EMC filter to the common-mode voltage measured on the network simulation and reduced by the EMC filter. Due to the coupling of the symmetrical compensation conductor loops 3, 7 to the X and Y interference suppression capacitors 8, 9, the strong resonances that occur when using only one compensation conductor loop 3, 7 can be largely minimized.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Filters And Equalizers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018119233.9A DE102018119233A1 (de) | 2018-08-07 | 2018-08-07 | EMV-Filteranordnung |
PCT/EP2019/069289 WO2020030392A1 (de) | 2018-08-07 | 2019-07-17 | Emv-filteranordnung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3769410A1 true EP3769410A1 (de) | 2021-01-27 |
Family
ID=67383775
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19742192.8A Pending EP3769410A1 (de) | 2018-08-07 | 2019-07-17 | Emv-filteranordnung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3769410A1 (de) |
CN (1) | CN209345008U (de) |
DE (1) | DE102018119233A1 (de) |
WO (1) | WO2020030392A1 (de) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7180389B2 (en) * | 2004-12-17 | 2007-02-20 | Virginia Tech Intellectual Properties, Inc. | EMI filter and frequency filters having capacitor with inductance cancellation loop |
US7589605B2 (en) * | 2006-02-15 | 2009-09-15 | Massachusetts Institute Of Technology | Method and apparatus to provide compensation for parasitic inductance of multiple capacitors |
US9825522B2 (en) * | 2015-04-09 | 2017-11-21 | Ford Global Technologies, Llc | Method and apparatus for coupling cancellation |
-
2018
- 2018-08-07 DE DE102018119233.9A patent/DE102018119233A1/de active Pending
- 2018-09-05 CN CN201821446870.1U patent/CN209345008U/zh active Active
-
2019
- 2019-07-17 WO PCT/EP2019/069289 patent/WO2020030392A1/de unknown
- 2019-07-17 EP EP19742192.8A patent/EP3769410A1/de active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2020030392A1 (de) | 2020-02-13 |
DE102018119233A1 (de) | 2020-02-13 |
CN209345008U (zh) | 2019-09-03 |
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Legal Events
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AK | Designated contracting states |
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17Q | First examination report despatched |
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