EP3970269A1 - Assembly comprising a board defining a voltage converter - Google Patents
Assembly comprising a board defining a voltage converterInfo
- Publication number
- EP3970269A1 EP3970269A1 EP20723884.1A EP20723884A EP3970269A1 EP 3970269 A1 EP3970269 A1 EP 3970269A1 EP 20723884 A EP20723884 A EP 20723884A EP 3970269 A1 EP3970269 A1 EP 3970269A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- screen
- card
- midpoint
- support
- potential
- 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.)
- Withdrawn
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 15
- 239000004020 conductor Substances 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims description 21
- 239000003990 capacitor Substances 0.000 claims description 9
- 239000000615 nonconductor Substances 0.000 claims description 7
- 239000002470 thermal conductor Substances 0.000 claims description 6
- 239000000758 substrate Substances 0.000 abstract 3
- 238000004804 winding Methods 0.000 description 4
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- CHPZKNULDCNCBW-UHFFFAOYSA-N gallium nitrate Chemical compound [Ga+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O CHPZKNULDCNCBW-UHFFFAOYSA-N 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 229910002601 GaN Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 229940044658 gallium nitrate Drugs 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
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
- H02M1/14—Arrangements for reducing ripples from dc input or output
- H02M1/15—Arrangements for reducing ripples from dc input or output using active elements
-
- 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
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
-
- 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
- H02M1/123—Suppression of common mode voltage or current
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
Definitions
- Assembly comprising a card defining a voltage converter
- the present invention relates to an assembly comprising a card defining a voltage converter.
- the voltage converter is for example a DC / DC voltage converter, or an inverter / rectifier.
- Such a converter is for example integrated into the electric power supply circuit of a propulsion motor of an electric vehicle or of an alternator / starter of a hybrid vehicle.
- Such a voltage converter conventionally uses transistors.
- New transistor technologies based on gallium nitride (GaN) or based on silicon carbide (SiC) achieve much higher performance in terms of switching speed than previous technologies, which in case of high power cutting , can generate overvoltages and EMC disturbances.
- a common mode filtering circuit In the passive version, a usual common mode filtering circuit uses coils and capacitors. Integration into a constrained environment and the additional cost induced by such a passive version filter circuit is an obstacle to its use.
- the object of the invention is to meet this need and it achieves this, in one of its aspects, by means of a set, comprising:
- a card carrying electronic components so as to define a voltage converter the card carrying at least two electronic switches disposed electrically in series so as to form a switching arm and to define a midpoint between them, and
- the assembly comprising an active common mode filtering circuit generating, on the basis of the potential of the midpoint, a corrective voltage applied between the screen and a part of the assembly, this part being in particular the support or the earth.
- the active common mode filter circuit can generate the corrective voltage based on the voltage between the midpoint and the ground with respect to which the potential of that point middle is referenced.
- the invention proposes an active common mode filtering circuit which does not require the addition of a winding in the common mode inductor.
- a conductive screen is interposed between the switched voltage source, that is to say the midpoint between the two electronic switches in series of the switching arm, and the mass with respect to which the potential of the point middle is referenced. The presence of the screen makes it possible to introduce a corrective voltage source between the switched voltage source and this ground. It is thus possible to benefit from a simple active common mode filtering circuit.
- the corrective voltage generated by the active common mode filtering circuit according to the invention can be the opposite of the voltage between the midpoint and the ground with respect to which the potential of this midpoint is referenced, or be equal to at minus 20% of the opposite of this voltage.
- the corrective voltage is the opposite of the voltage between the midpoint and the ground referencing the potential of this midpoint, the voltage of the common mode capacitor between the medium and the earth may be zero.
- the support may belong to a case which encapsulates all or part of the voltage converter.
- This case may or may not be metallic, or at least partly metallic.
- Each electronic switch of the switching arm is for example a controllable switch.
- This is in particular a MOS transistor which can be made of gallium nitrate (GaN) or of silicon carbide (SiC) or of silicon.
- the screen especially when it is metallic, is for example formed by a plate.
- the screen can be arranged between two faces parallel to each other belonging respectively to the card and to the support. In such a case:
- an electrical insulator and in particular a thermal conductor, can be interposed between the card and the screen and / or
- an electrical insulator and in particular a thermal conductor, can be interposed between the screen and the support.
- the card is for example a printed circuit card.
- the screen can be worn by the holder, and the card can be worn by the screen.
- This support function provided by the screen for the card can correspond to:
- the support function provided by the support for the screen can similarly correspond to a simple stacking in the sense of gravity or to a maintenance via fixing means.
- the screen is thus not only physically interposed between the support and the card, but also functionally interposed between this support and this card.
- the card can be carried by the support, if necessary via one or more electrical insulators, without the participation of the screen but the screen is physically interposed between the card and the support.
- the active common mode filtering circuit can be wholly or partly carried by the card, then being at least partly offset relative to the screen.
- the active common mode filtering circuit can comprise an amplifier receiving at input a signal representative of the potential of the midpoint, in particular representative of the voltage between the midpoint and the ground referencing the potential of this midpoint.
- This amplifier is for example an operational amplifier or a push-pull type amplifier.
- the active common mode filtering circuit can comprise a bandpass filter applied to the potential of the midpoint, in particular to the voltage between the midpoint and the ground referencing the potential of this midpoint, so as to generate the representative signal.
- This bandpass filter is on the one hand to block DC components that could cause short circuits, and on the other hand to reduce high frequency noise.
- This bandpass filter has for example a passband of between 10kHz and 10GHz.
- the active common mode filter circuit When the active common mode filter circuit includes an amplifier, it may further include a capacitor arranged in series with the output of the amplifier. This capacitor blocks the DC common-mode voltage, allowing the amplifier to impose a voltage on its load, whether the load is floating or not.
- the card may carry enough electronic switches to define several switch arms, for example two, three, four, five or six switch arms, each switch arm having a midpoint defined between the two
- the active common mode filter circuit can generate the corrective voltage on the basis of the sum of the potentials of the midpoints of each switching arm.
- the active common mode filtering circuit receives for example as input the sum of the voltages between each respective midpoint and the common ground referencing the potentials of these midpoints.
- the screen is for example only physically interposed between the conductor or conductors at the potential of a midpoint and the support.
- the screen can be physically interposed between the support and the entire card.
- the screen is not only interposed between the conductor or conductors of the card whose potential is that of a midpoint and the support, but also between this support and the rest of the card.
- the voltage converter can form a DC / DC voltage converter 48V / 12V, comprising a first DC voltage input at 48V, the voltage of which is cut off by the switching arm.
- the DC voltage output of this converter is for example at a voltage of 12V.
- Such a voltage converter is for example integrated in a hybrid vehicle incorporating an alternator-starter supplied by an electrical unit storage source whose nominal voltage is 48V.
- it can be a DC / DC voltage converter with one of the voltages of 12V and the other greater than 60V.
- the electrical conductor or conductors which are at the potential of a midpoint of a switching arm may be electrical tracks.
- all or part of the electronic components of the voltage converter can be carried by a face of the card which faces the screen.
- the electrical conductor, in particular the electrical track, or all or part of the electrical conductors, in particular electrical tracks, at the potential of a midpoint of a switching arm can be brought (s). by one side of the card which is turned towards the screen.
- the active common mode filtering circuit of the invention can be combined with a passive common mode filtering circuit, the latter being formed by one or more capacitors, and by one or more coils.
- This passive common mode filter is then applied between the support and each DC output potential, or between the earth and each DC output potential, in the case of a DC / DC voltage converter.
- FIG. 1 shows schematically an assembly with card, screen and support according to an example of implementation of the invention
- FIG. 1 An assembly according to an exemplary implementation of the invention.
- This assembly comprises a support 1 which is here a metal support, for example made of aluminum.
- This support 1 is not connected to the earth. Due to this potential difference, a common mode parasitic capacitance Cc Msupport exists between the support 1 and the earth 2.
- the metal support 1 here has a U-shape, belonging to a case which can encapsulate the card 3 which is also part of the whole.
- Card 3 here is a printed circuit board.
- this printed circuit board 3 is in the form of a plate extending between two parallel faces 5.
- One of these faces 5, which is here the face turned towards a screen 8 which will be described later. carries electronic components forming all or part of a voltage converter.
- the voltage converter is in the example considered a DC / DC voltage converter, splitting a voltage of 48V into a voltage of 12V.
- the invention is neither limited to these values for a voltage converter
- the printed circuit board 3 carries electronic switches so as to define one or more switching arms.
- Each switching arm is here formed by two electronic switches mounted in series, and defining between them a midpoint. All these switching arms are here mounted in parallel with a DC voltage input, which is at 48V in the example considered.
- Each electronic switch of the switching arms is for example a controllable switch.
- This is in particular a MOS transistor which can be made of gallium nitride (GaN), silicon carbide (SiC) or silicon.
- Some of the electrical tracks 10 have the electrical potential of a midpoint of a switching arm.
- the screen 8 is physically interposed between the face 5 of the printed circuit board which carries the electric tracks at the electric potential of a midpoint and the metal support 1. More precisely the metal screen 8 is here arranged between two faces parallel to each other belonging respectively to the printed circuit board 3, namely the aforementioned face 5, and to the metal support 1.
- this physical interposition is accompanied by a support function played by the metal support 1 vis-à-vis the screen 8 and the screen 8 vis-à-vis the circuit board printed 3.
- the screen 8 is here physically interposed between the electrical tracks 10 which are at the potential of a midpoint of a switching arm, and the metal support 1.
- the existing common mode parasitic capacitances have been shown, namely Cc M réelle , and Co corresponding respectively to the capacitance between the printed circuit board 3 and the screen 8, and the capacitance between the screen 8 and the metal support 1.
- An active common mode filter circuit 20 is provided.
- This active filter circuit 20 receives as input in the example considered the voltage between the midpoint and the ground with respect to which the potential of this midpoint is referenced.
- the input of the active common mode filtering circuit can correspond to the sum, over all the switching arms, of the voltages between a midpoint and the common ground which references the potentials of the midpoints.
- the active filter circuit 20 comprises in the example described a band-pass filter 21 which receives as input the voltage between the midpoint and the ground referencing the latter, so as to generate at output an input signal for an amplifier 22 which here is an operational amplifier. At the output of this amplifier 22 is provided a capacitor 23 making it possible to filter the DC common mode voltage.
- the band-pass filter 21, the amplifier 22 and the capacitor 23 are carried by the printed circuit board 3, the output of the active filter circuit 20 being connected to the screen via d 'a thread 24.
- the output of the capacitor 23 corresponds here to the output of the active common mode filtering circuit 20 and this output allows in the example considered the application between the screen 8 and the metal support 1 of a voltage compensating for the mode voltage common between the midpoint and the mass referencing the latter.
- a passive common mode filtering circuit 25 can also be used in combination with the filtering circuit 20 which has just been described. This passive common mode filtering circuit 25 is here mounted between the potential at 48V from the voltage converter, the potential at 12V from the voltage converter, and the metal support 1.
- the support 1 may not be metallic, being for example plastic.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Dc-Dc Converters (AREA)
- Analogue/Digital Conversion (AREA)
- Networks Using Active Elements (AREA)
- Rectifiers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1904971A FR3096196B1 (en) | 2019-05-13 | 2019-05-13 | Assembly comprising a card defining a voltage converter |
PCT/EP2020/063057 WO2020229413A1 (en) | 2019-05-13 | 2020-05-11 | Assembly comprising a board defining a voltage converter |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3970269A1 true EP3970269A1 (en) | 2022-03-23 |
Family
ID=67957036
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20723884.1A Withdrawn EP3970269A1 (en) | 2019-05-13 | 2020-05-11 | Assembly comprising a board defining a voltage converter |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3970269A1 (en) |
CN (1) | CN113812077A (en) |
FR (1) | FR3096196B1 (en) |
WO (1) | WO2020229413A1 (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4710861A (en) * | 1986-06-03 | 1987-12-01 | Martin Kanner | Anti-ripple circuit |
GB9812138D0 (en) * | 1998-06-06 | 1998-08-05 | Linn Prod Ltd | Noise suppression system for a power supply |
US6775157B2 (en) * | 2002-06-25 | 2004-08-10 | International Rectifier Corporation | Closed loop active EMI filter for reducing common or differential noise based on an error value |
US9270159B2 (en) * | 2012-08-07 | 2016-02-23 | Hamilton Sundstrand Corporation | EMI filter using active damping with frequency dependant impedance |
-
2019
- 2019-05-13 FR FR1904971A patent/FR3096196B1/en active Active
-
2020
- 2020-05-11 EP EP20723884.1A patent/EP3970269A1/en not_active Withdrawn
- 2020-05-11 CN CN202080035240.9A patent/CN113812077A/en active Pending
- 2020-05-11 WO PCT/EP2020/063057 patent/WO2020229413A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
FR3096196B1 (en) | 2021-07-30 |
FR3096196A1 (en) | 2020-11-20 |
CN113812077A (en) | 2021-12-17 |
WO2020229413A1 (en) | 2020-11-19 |
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