EP3970269A1 - Assembly comprising a board defining a voltage converter - Google Patents

Assembly comprising a board defining a voltage converter

Info

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Withdrawn
Application number
EP20723884.1A
Other languages
German (de)
French (fr)
Inventor
Nicolas ALLALI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Systemes de Controle Moteur SAS
Original Assignee
Valeo Systemes de Controle Moteur SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Valeo Systemes de Controle Moteur SAS filed Critical Valeo Systemes de Controle Moteur SAS
Publication of EP3970269A1 publication Critical patent/EP3970269A1/en
Withdrawn legal-status Critical Current

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
    • H02M1/14—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

Assembly comprising: - a substrate (1), - a board (3) which has electronic components so as to define a voltage converter, the board (3) having at least two electronic switches which are arranged electrically in series so as to form a switching arm and to define a centre point between them, and - a metal screen (8) which is physically positioned between the substrate (1) and at least one electrical conductor (10) of the board (3) which is at the potential of the centre point, the assembly comprising an active common mode filter circuit (20) which generates a correction voltage which is applied between the screen (8) and the substrate (1) on the basis of the voltage between the centre point and the screen (8).

Description

Ensemble comprenant une carte définissant un convertisseur de tension Assembly comprising a card defining a voltage converter
La présente invention concerne un ensemble comprenant une carte définissant un convertisseur de tension. The present invention relates to an assembly comprising a card defining a voltage converter.
Le convertisseur de tension est par exemple un convertisseur de tension continue/continue, ou encore un onduleur/redresseur. Un tel convertisseur est par exemple intégré au circuit électrique d’alimentation d’un moteur de propulsion d’un véhicule électrique ou d’un alterno/démarreur d’un véhicule hybride. Un tel convertisseur de tension met classiquement en œuvre des transistors. Les nouvelles technologies de transistors à base de nitrure de gallium (GaN) ou à base de carbure de silicium (SiC) atteignent des performances en termes de vitesse de commutation bien plus élevées que les technologies précédentes, ce qui en cas de découpage de fortes puissances, peut générer des surtensions et des perturbations CEM. 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.
Il est connu, pour remédier à ces perturbations CEM d’avoir recours à un circuit de filtrage de mode commun. En version passive, un circuit de filtrage de mode commun usuel met en œuvre des bobines et des condensateurs. L’intégration dans un environnement contraint et le surcoût induit par un tel circuit de filtrage en version passive est un obstacle à son utilisation. To remedy these EMC disturbances, it is known to have recourse to 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.
En version active, il est connu de rajouter un enroulement dans l’inductance de mode commun, cet enroulement permettant l’injection d’un courant opposé au courant estimé ou mesuré de mode commun. La réalisation et la commande d’un tel enroulement peuvent cependant s’avérer complexes. In the active version, it is known to add a winding in the common mode inductor, this winding allowing the injection of a current opposite to the estimated or measured common mode current. However, the realization and control of such a winding can be complex.
Il existe un besoin pour remédier à tout ou partie des inconvénients précités. There is a need to remedy all or part of the aforementioned drawbacks.
L’invention a pour objet de répondre à ce besoin et elle y parvient, selon l’un de ses aspects, à l’aide d’un ensemble, comprenant : 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:
- un support, notamment métallique, - a support, in particular metallic,
- une carte portant des composants électroniques de manière à définir un convertisseur de tension, la carte portant au moins deux interrupteurs électroniques disposés électriquement en série de manière à former un bras de commutation et à définir entre eux un point milieu, et 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
- un écran métallique, interposé physiquement entre le support et au moins un conducteur électrique de la carte qui est au potentiel du point milieu, - a metal screen, physically interposed between the support and at least one electrical conductor of the card which is at the potential of the midpoint,
l’ensemble comprenant un circuit de filtrage de mode de commun actif générant, sur la base du potentiel du point milieu, une tension corrective appliquée entre l’écran et une pièce de l’ensemble, cette pièce étant notamment le support ou la terre. 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.
Dans le cas où le convertisseur de tension comprend un unique bras de commutation, le circuit de filtrage de mode commun actif peut générer la tension corrective sur la base de la tension entre le point milieu et la masse par rapport à laquelle le potentiel de ce point milieu est référencé. L’invention propose un circuit de filtrage de mode commun actif ne nécessitant pas l’ajout d’un enroulement dans l’inductance de mode commun. Selon l’invention, un écran conducteur est interposé entre la source de tension commutée, c’est-à-dire le point milieu entre les deux intermpteurs électroniques en série du bras de commutation, et la masse par rapport à laquelle le potentiel du point milieu est référencé. La présence de l’écran permet d’introduire une source de tension corrective entre la source de tension commutée et cette masse. On peut ainsi bénéficier d’un circuit de filtrage de mode commun actif simple. In the case where the voltage converter includes a single switching arm, 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. According to the invention, 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.
La tension corrective générée par le circuit de filtrage de mode commun actif selon l’invention peut être l’opposée de la tension entre le point milieu et la masse par rapport à laquelle le potentiel de ce point milieu est référencé, ou être égale à au moins 20% de l’opposée de cette tension. Lorsque la tension corrective est l’opposée de la tension entre le point milieu et la masse référençant le potentiel de ce point milieu, la tension de la capacité de mode commun entre le support et la terre peut être nulle. 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. When 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.
Le support peut appartenir à un boîtier encapsulant en tout ou partie le convertisseur de tension. Ce boîtier peut être métallique ou non, ou encore au moins en partie métallique. 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.
Chaque interrupteur électronique du bras de commutation est par exemple un interrupteur commandable. Il s’agit notamment d’un transistor MOS qui peut être réalisé en nitmre de gallium (GaN) ou en carbure de silicium (SiC) ou en silicium. 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.
L’écran, notamment lorsqu’il est métallique, est par exemple formé par une plaque. The screen, especially when it is metallic, is for example formed by a plate.
L’écran peut être disposé entre deux faces parallèles entre elles appartenant respectivement à la carte et au support. Dans un tel cas : 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:
- un isolant électrique, et notamment conducteur thermique, peut être interposé entre la carte et l’écran et/ou - an electrical insulator, and in particular a thermal conductor, can be interposed between the card and the screen and / or
- un isolant électrique, et notamment conducteur thermique, peut être interposé entre l’écran et le support. - an electrical insulator, and in particular a thermal conductor, can be interposed between the screen and the support.
Le cas échéant, d’autres couches intermédiaires électriquement conductrices ou non, et/ou du vide peuvent être interposés entre la carte et l’écran. If necessary, other electrically conductive or non-electrically conductive intermediate layers and / or vacuum can be interposed between the card and the screen.
La carte est par exemple une carte de circuit imprimé. The card is for example a printed circuit card.
Le cas échéant, d’autres couches intermédiaires électriquement conductrices ou non, et/ou du vide peuvent être interposés entre l’écran et le support. If necessary, other intermediate electrically conductive layers or not, and / or a vacuum can be interposed between the screen and the support.
Dans tout ce qui précède, l’écran peut être porté par le support, et la carte peut être portée par l’écran. Cette fonction de support fournie par l’écran pour la carte peut correspondre : In all of the above, 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:
- à un simple empilement au sens de la gravité, le cas échéant avec l’isolant électrique précité interposé, ou - a simple stack in the sense of gravity, if necessary with the aforementioned electrical insulation interposed, or
- à un maintien via des moyens de fixation, par exemple des vis. La fonction de support fournie par le support pour l’écran peut similairement correspondre à un simple empilement au sens de la gravité ou à un maintien via des moyens de fixation. - to a maintenance via fixing means, for example screws. 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.
Dans ce cas, l’écran est ainsi non seulement physiquement interposé entre le support et la carte, mais également fonctionnellement interposé entre ce support et cette carte. In this case, the screen is thus not only physically interposed between the support and the card, but also functionally interposed between this support and this card.
En variante, dans tout ce qui précède, la carte peut être portée par le support, le cas échéant via un ou plusieurs isolants électriques, sans participation de l’écran mais l’écran est physiquement interposé entre la carte et le support. As a variant, in all of the above, 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.
Dans tout ce qui précède, le circuit de filtrage de mode commun actif peut être en tout ou partie porté par la carte, étant alors au moins en partie déporté par rapport à l’écran. In all of the above, 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.
Dans tout ce qui précède, le circuit de filtrage de mode commun actif peut comprendre un amplificateur recevant en entrée un signal représentatif du potentiel du point milieu, notamment représentatif de la tension entre le point milieu et la masse référençant le potentiel de ce point milieu. Cet amplificateur est par exemple un amplificateur opérationnel ou un amplificateur de type push-pull. In all of the above, 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.
Dans ce dernier cas, le circuit de filtrage de mode commun actif peut comprendre un filtre passe-bande appliqué au potentiel du point milieu, notamment à la tension entre le point milieu et la masse référençant le potentiel de ce point milieu, de manière à générer le signal représentatif. L’intérêt de ce filtre passe-bande est d’une part de bloquer les composantes continues qui pourraient causer des court-circuits, et d’autre part de réduire les bruits haute fréquence. Ce filtre passe-bande a par exemple une bande passante comprise entre 10kHz et 10GHz. In the latter case, 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. The advantage of 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.
Lorsque le circuit de filtrage de mode commun actif comprend un amplificateur, il peut encore comprendre un condensateur disposé en série avec la sortie de l’amplificateur. Ce condensateur permet de bloquer la tension continue de mode commun, permettant ainsi à l’amplificateur d’imposer une tension sur sa charge, que cette charge soit flottante ou non. 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.
Dans tout ce qui précède, la carte peut porter suffisamment d’intermpteurs électroniques pour définir plusieurs bras de commutation, par exemple deux, trois, quatre, cinq ou six bras de commutation, chaque bras de commutation ayant un point milieu défini entre les deux In all of the above, 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
intermpteurs électroniques de ce bras, et l’écran peut être interposé entre le support et chaque conducteur électrique qui est au potentiel d’un point milieu d’un bras de commutation. Dans ce cas, le circuit de filtrage de mode commun actif peut générer la tension corrective sur la base de la somme des potentiels des points milieux de chaque bras de commutation. Le circuit de filtrage de mode commun actif reçoit par exemple en entrée la somme des tensions entre chaque point milieu respectif et la masse commune référençant les potentiels de ces points milieux. electronic switches of this arm, and the screen can be interposed between the holder and each electrical conductor that is at the potential of a midpoint of a switching arm. In this case, 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.
Dans un cas à deux bras de commutation : - la tension entre le point milieu du premier bras de commutation et la masse référençant le potentiel de ce point milieu, et In a case with two switching arms: - the voltage between the midpoint of the first switching arm and the ground referencing the potential of this midpoint, and
- la tension entre le point milieu du deuxième bras de commutation et ladite masse qui référence également le potentiel de ce dernier point milieu - the voltage between the midpoint of the second switching arm and said mass which also references the potential of this last midpoint
sont par exemple sommées et appliquées au circuit de filtrage de mode commun actif. are for example summed and applied to the active common mode filtering circuit.
L’écran est par exemple uniquement interposé physiquement entre le ou les conducteurs au potentiel d’un point milieu et le support. The screen is for example only physically interposed between the conductor or conductors at the potential of a midpoint and the support.
En variante, l’écran peut être interposé physiquement entre le support et toute la carte. Dans ce dernier cas, l’écran est non seulement interposé entre le ou les conducteurs de la carte dont le potentiel est celui d’un point milieu et le support, mais également entre ce support et le reste de la carte. Alternatively, the screen can be physically interposed between the support and the entire card. In the latter case, 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.
Dans tout ce qui précède, le convertisseur de tension peut former un convertisseur de tension continue/continue 48V/12V, comprenant une première entrée en tension continue à 48V dont la tension est découpée par le bras de commutation. La sortie en tension continue de ce convertisseur est par exemple à une tension de 12V. Un tel convertisseur de tension est par exemple intégré à un véhicule hybride intégrant un alterno-démarreur alimenté par une source de stockage d’unité électrique dont la tension nominale est de 48V. En variante, il peut s’agir d’un convertisseur de tension continue/continue avec une des tensions de 12V et l’autre supérieure à 60V. In all of the above, 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. Alternatively, it can be a DC / DC voltage converter with one of the voltages of 12V and the other greater than 60V.
D’autres applications sont possibles, par exemple avec un convertisseur de tension formant un onduleur. Other applications are possible, for example with a voltage converter forming an inverter.
Dans tout ce qui précède, et notamment lorsque la carte est une carte de circuit imprimé, le ou les conducteurs électriques qui sont au potentiel d’un point milieu d’un bras de commutation peuvent être des pistes électriques. In all of the above, and in particular when the card is a printed circuit board, the electrical conductor or conductors which are at the potential of a midpoint of a switching arm may be electrical tracks.
Dans tout ce qui précède, tout ou partie des composants électroniques du convertisseur de tension peuvent être portés par une face de la carte qui est tournée vers l’écran. In all of the above, all or part of the electronic components of the voltage converter can be carried by a face of the card which faces the screen.
Dans tout ce qui précède, le conducteur électrique, notamment la piste électrique, ou tout ou partie des conducteurs électriques, notamment des pistes électriques, au potentiel d’un point milieu d’un bras de commutation peu(vent) être porté(s) par une face de la carte qui est tournée vers l’écran. In all of the above, 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.
Dans tout ce qui précède, le circuit de filtrage de mode commun actif de l’invention peut être combiné avec un circuit de filtrage de mode commun passif, ce dernier étant formé par un ou plusieurs condensateurs, et par une ou plusieurs bobines. Ce filtre de mode commun passif est alors appliqué entre le support et chaque potentiel continu de sortie, ou entre la terre et chaque potentiel continu de sortie, dans le cas d’un convertisseur de tension continue/continue. L’invention pourra être mieux comprise à la lecture de la description qui va suivre d’un exemple non limitatif de mise en œuvre de celle-ci et à l’examen du dessin annexé sur lequel :In all of the above, 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. The invention may be better understood from reading the following description of a non-limiting example of its implementation and from examining the appended drawing in which:
- la figure 1 représente de façon schématique un ensemble avec carte, écran et support selon un exemple de mise en œuvre de l’invention, - Figure 1 shows schematically an assembly with card, screen and support according to an example of implementation of the invention,
- la figure 2 représente de façon schématique le schéma électrique équivalent de celui de la figure - Figure 2 shows schematically the electrical diagram equivalent to that of Figure
1. 1.
On a représenté sur la figure 1 un ensemble selon un exemple de mise en œuvre de l’invention. Cet ensemble comprend un support 1 qui est ici un support métallique, par exemple réalisé en aluminium. There is shown in Figure 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.
Ce support 1 n’est pas relié à la terre. Du fait de cette différence de potentiel, une capacité parasite de mode commun CcMsupport existe entre le support 1 et la terre 2. Le support métallique 1 a ici une forme de U, appartenant à un boîtier qui peut encapsuler la carte 3 qui fait également partie de l’ensemble. La carte 3 est ici une carte de circuit imprimé. 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.
De façon connue, cette carte de circuit imprimé 3 se présente sous la forme d’une plaque s’étendant entre deux faces parallèles 5. L’une de ces faces 5, qui est ici la face tournée vers un écran 8 qui sera décrit ultérieurement, porte des composants électroniques formant tout ou partie d’un convertisseur de tension. Le convertisseur de tension est dans l’exemple considéré un convertisseur de tension continue/continue, découpant une tension de 48V en une tension de 12V. L’invention n’est cependant limitée ni à ces valeurs pour un convertisseur de tension In a known manner, 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. However, the invention is neither limited to these values for a voltage converter
continue/continue, ni à ce type de convertisseur, s’appliquant par exemple à un continuous / continuous, nor to this type of converter, applying for example to a
onduleur/redresseur. inverter / rectifier.
La face 5 tournée vers l’écran porte des pistes électriques 10. La carte de circuit imprimé 3 porte des interrupteurs électroniques de manière à définir un ou plusieurs bras de commutation. Chaque bras de commutation est ici formé par deux intermpteurs électroniques montés en série, et définissant entre eux un point milieu. Tous ces bras de commutation sont ici montés en parallèle d’une entrée en tension continue, qui est à 48V dans l’exemple considéré. Chaque interrupteur électronique des bras de commutation est par exemple un interrupteur commandable. Il s’agit notamment d’un transistor MOS qui peut être réalisé en nitrure de gallium (GaN), en carbure de silicium (SiC) ou en silicium. Face 5 facing the screen carries electrical tracks 10. 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.
Certaines des pistes électriques 10 ont pour potentiel électrique celui d’un point milieu d’un bras de commutation. Some of the electrical tracks 10 have the electrical potential of a midpoint of a switching arm.
Dans l’exemple considéré, l’écran 8 est interposé physiquement entre la face 5 de la carte de circuit imprimé qui porte les pistes électriques au potentiel électrique d’un point milieu et le support métallique 1. Plus précisément l’écran métallique 8 est ici disposé entre deux faces parallèles entre elles appartenant respectivement à la carte de circuit imprimé 3, à savoir la face 5 précitée, et au support 1 métallique. In the example considered, 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.
Dans l’exemple considéré, cette interposition physique s’accompagne d’une fonction de support jouée par le support métallique 1 vis-à-vis de l’écran 8 et de l’écran 8 vis-à-vis de la carte de circuit imprimé 3. In the example considered, 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.
On observe en effet sur la figure 1 que l’écran 8 repose sur le fond du support métallique 1 via une couche 11 d’un isolant électrique et conducteur thermique. On observe similairement sur cette figure que la face 5 de la carte de circuit imprimé 3 tournée vers l’écran 8 repose sur cet écran via une couche 12 d’un isolant électrique et conducteur thermique, qui peut ou non être de même nature que la couche 11. In fact, we see in Figure 1 that the screen 8 rests on the bottom of the metal support 1 via a layer 11 of an electrical insulator and thermal conductor. It is similarly observed in this figure that the face 5 of the printed circuit board 3 facing the screen 8 rests on this screen via a layer 12 of an electrical insulator and thermal conductor, which may or may not be of the same type as the layer 11.
Comme on peut le voir sur la figure 1, l’écran 8 est ici physiquement interposé entre les pistes électriques 10 qui sont au potentiel d’un point milieu d’un bras de commutation, et le support métallique 1. As can be seen in Figure 1, 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.
Les capacités parasites de mode commun existant ont été représentées, à savoir CcMécran, et Co correspondant respectivement à la capacité entre la carte de circuit imprimé 3 et l’écran 8, et la capacité entre l’écran 8 et le support métallique 1. The existing common mode parasitic capacitances have been shown, namely Cc Mécran , 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.
Un circuit de filtrage de mode commun actif 20 est prévu. Ce circuit de filtrage actif 20 reçoit en entrée dans l’exemple considéré la tension entre le point milieu et la masse par rapport à laquelle le potentiel de ce point milieu est référencé. Dans le cas d’un convertisseur avec plusieurs bras de commutation, l’entrée du circuit de filtrage de mode commun actif peut correspondre à la somme, sur l’ensemble des bras de commutation, des tensions entre un point milieu et la masse commune qui référence les potentiels des points milieux. 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. In the case of a converter with several switching arms, 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.
Le circuit de filtrage actif 20 comprend dans l’exemple décrit un filtre passe-bande 21 qui reçoit en entrée la tension entre le point milieu et la masse référençant ce dernier, de manière à générer en sortie un signal d’entrée pour un amplificateur 22 qui est ici un amplificateur opérationnel. En sortie de cet amplificateur 22 est prévu un condensateur 23 permettant de filtrer la tension continue de mode commun. Dans l’exemple considéré, le filtre passe-bande 21, l’amplificateur 22 et le condensateur 23 sont portés par la carte de circuit imprimé 3, la sortie du circuit de filtrage actif 20 étant reliée à l’écran par l’intermédiaire d’un fil 24. 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. In the example considered, 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.
La sortie du condensateur 23 correspond ici à la sortie du circuit de filtrage de mode commun actif 20 et cette sortie permet dans l’exemple considéré l’application entre l’écran 8 et le support métallique 1 d’une tension compensant la tension de mode commun existant entre le point milieu et la masse référençant ce dernier. On constate sur la figure 2 qu’un circuit de filtrage de mode commun passif 25 peut également être utilisé en combinaison avec le circuit de filtrage 20 qui vient d’être décrit. Ce circuit de filtrage de mode commun passif 25 est ici monté entre le potentiel à 48V du convertisseur de tension, le potentiel à 12V du convertisseur de tension, et le support métallique 1. 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. It can be seen in FIG. 2 that 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.
Le support 1 peut ne pas être métallique, étant par exemple en plastique. The support 1 may not be metallic, being for example plastic.

Claims

Revendications Claims
1. Ensemble, comprenant : 1. Set, including:
- un support (1), - a support (1),
- une carte (3) portant des composants électroniques de manière à définir un convertisseur de tension, la carte (3) portant au moins deux interrupteurs électroniques disposés électriquement en série de manière à former un bras de commutation et à définir entre eux un point milieu, et - a card (3) carrying electronic components so as to define a voltage converter, the card (3) 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
- un écran métallique (8), interposé physiquement entre le support (1) et au moins un conducteur électrique (10) de la carte (3) qui est au potentiel du point milieu, - a metal screen (8), physically interposed between the support (1) and at least one electrical conductor (10) of the card (3) which is at the potential of the midpoint,
l’ensemble comprenant un circuit de filtrage de mode de commun actif (20) générant, sur la base du potentiel du point milieu, une tension corrective appliquée entre l’écran (8) et une pièce de l’ensemble, cette pièce étant notamment le support (1). the assembly comprising an active common mode filtering circuit (20) generating, on the basis of the potential of the midpoint, a corrective voltage applied between the screen (8) and a part of the assembly, this part being in particular the support (1).
2. Ensemble selon la revendication 1 , chaque interrupteur électronique du bras de commutation étant un intermpteur commandable. 2. An assembly according to claim 1, each electronic switch of the switching arm being a controllable switch.
3. Ensemble selon la revendication 1 ou 2, l’écran métallique (8) étant disposé entre deux faces parallèles entre elles appartenant respectivement à la carte (3) et au support (1). 3. An assembly according to claim 1 or 2, the metal screen (8) being disposed between two faces parallel to each other belonging respectively to the card (3) and to the support (1).
4. Ensemble selon la revendication 3, un isolant électrique, et notamment conducteur thermique, (12) étant interposé entre la carte (3) et l’écran (8) et/ou un isolant électrique, et notamment conducteur thermique, (11) étant interposé entre l’écran (8) et le support (1). 4. Assembly according to claim 3, an electrical insulator, and in particular a thermal conductor, (12) being interposed between the card (3) and the screen (8) and / or an electrical insulator, and in particular a thermal conductor, (11) being interposed between the screen (8) and the support (1).
5. Ensemble selon l’une quelconque des revendications précédentes, l’écran (8) étant porté par le support (1), et la carte (3) étant portée par l’écran (8). 5. An assembly according to any one of the preceding claims, the screen (8) being carried by the support (1), and the card (3) being carried by the screen (8).
6. Ensemble selon l’une quelconque des revendications précédentes, le circuit de filtrage de mode commun actif (20) comprenant un amplificateur (22) recevant en entrée un signal représentatif du potentiel du point milieu. 6. An assembly according to any one of the preceding claims, the active common mode filtering circuit (20) comprising an amplifier (22) receiving as input a signal representative of the potential of the midpoint.
7. Ensemble selon la revendication 6, le circuit de filtrage de mode commun actif (20) comprenant un filtre passe-bande (21) appliqué au potentiel du point milieu, de manière à générer le signal représentatif dudit potentiel. 7. Assembly according to claim 6, the active common mode filtering circuit (20) comprising a band-pass filter (21) applied to the potential of the midpoint, so as to generate the signal representative of said potential.
8. Ensemble selon la revendication 6 ou 7, le circuit de filtrage de mode commun actif (20) comprenant un condensateur (23) disposé en série avec la sortie de l’amplificateur (22). 8. The assembly of claim 6 or 7, the active common mode filter circuit (20) comprising a capacitor (23) arranged in series with the output of the amplifier (22).
9. Ensemble selon l’une quelconque des revendications précédentes, l’écran (8) étant interposé physiquement entre le support (1) et toute la carte. 9. An assembly according to any preceding claim, the screen (8) being physically interposed between the support (1) and the entire card.
10. Ensemble selon l’une quelconque des revendications précédentes, le conducteur électrique (10) au potentiel d’un point milieu d’un bras de commutation étant porté par une face (5) de la carte (3) qui est tournée vers l’écran (8). 10. Assembly according to any one of the preceding claims, the electrical conductor (10) at the potential of a midpoint of a switching arm being carried by a face (5) of the card (3) which is turned towards the 'screen (8).
11. Ensemble selon l’une quelconque des revendications précédentes, le convertisseur de tension formant un convertisseur de tension continue/continue 48/ 12V, comprenant une première entrée en tension continue à 48V dont la tension est découpée par le bras de commutation. 11. An assembly according to any one of the preceding claims, the voltage converter forming a DC / DC voltage converter 48 / 12V, comprising a first DC voltage input at 48V, the voltage of which is cut off by the switching arm.
EP20723884.1A 2019-05-13 2020-05-11 Assembly comprising a board defining a voltage converter Withdrawn EP3970269A1 (en)

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

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EP20723884.1A Withdrawn EP3970269A1 (en) 2019-05-13 2020-05-11 Assembly comprising a board defining a voltage converter

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EP (1) EP3970269A1 (en)
CN (1) CN113812077A (en)
FR (1) FR3096196B1 (en)
WO (1) WO2020229413A1 (en)

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* Cited by examiner, † Cited by third party
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

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FR3096196A1 (en) 2020-11-20
CN113812077A (en) 2021-12-17
WO2020229413A1 (en) 2020-11-19

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