• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The electrical circuit comprises: a main electrical conductor (106B), an electrical component (112) pressed against the main electrical conductor (106B), and an electrical insulator (302) covering the main electrical conductor (106B) and the electrical component (112 ), the electrical insulator (302) having an upper face (304) opposite the main electrical conductor (106B). The electrical circuit further comprises a fire-rated element (404) extending at least against 85% of a part (604) of the upper face (304) of the electrical insulation (302) or extending to a predefined distance of at least 85% of a part (604) of the upper face (304) of the electrical insulation (302), this part (604) grouping the point or points of the upper face (304) of the electrical insulator (302) closest to the electrical component (112).
    公开号:FR3082369A1
    申请号:FR1855035
    申请日:2018-06-08
    公开日:2019-12-13
    发明作者:Manuel Falguier；Romain Henneguet
    申请人:Valeo Equipements Electriques Moteur SAS；
    IPC主号:
    专利说明:

    TITLE
    ELECTRICAL CIRCUIT, SWITCHING ARM AND CONVERTER
    VOLTAGE
    TECHNICAL AREA
    The present invention relates to an electrical circuit, a switching arm and a voltage converter.
    TECHNOLOGICAL BACKGROUND
    The international PCT application published under the number WO 2007 003824 A2 describes an electrical circuit comprising:
    - a first electrical conductor, said to be the main,
    - an electrical component pressed against the first main electrical conductor,
    - an electrical insulator covering the first main electrical conductor and the electrical component, the electrical insulator having an upper face opposite the first main electrical conductor.
    More specifically, the electrical component is a controllable switch of a switching arm of a voltage converter. The power module includes a housing delimiting a bowl in which the switch is located. The bowl is filled with electrical insulation, gel or epoxy resin, and closed with a plastic cover.
    However, in the event of overheating of the electrical component, for example in the event of a short circuit in the case of a controllable switch, the heat is diffused in the electrical insulator so that its upper face risks catching fire, endangering the surrounding elements.
    The purpose of the invention is to at least partially overcome the above problem.
    SUMMARY OF THE INVENTION
    To this end, an electrical circuit is proposed comprising:
    - a first electrical conductor, said to be the main,
    - an electrical component pressed against the first main electrical conductor,
    - an electrical insulator covering the first main electrical conductor and the electrical component, the electrical insulator having an upper face opposite to the first main electrical conductor, characterized in that the electrical circuit further comprises a fireproof element extending at less against 85% of a part (604) of the upper face (304) of the electrical insulation (302) or extending at a predefined distance of at least 85% of a part of the upper face of the electrical insulator, this part grouping the point or points of the upper face of the electrical insulator closest to the electrical component.
    Thus, thanks to the fire element, the spread of fire is stopped or at least limited.
    According to an additional characteristic, the predefined distance is less than 1 mm, preferably less than 0.5 mm and even more preferably 0.2 mm.
    The distance between the fire element and the upper face of the electrical insulation is preferably as small as possible to stop the spread of fire as close as possible to the electrical component. However, it is possible to insert a layer of glue or resin between the fire element and the upper face of the electrical insulation, in particular to promote good distribution of the support forces between the fire element and the insulation. electric. A distance between the fire element and the upper face of the electrical insulation less than 1 mm, preferably less than 0.5 mm and even more preferably 0.2 mm makes it possible to keep the fire element good ability to stop or limit the spread of fire.
    Optionally, the fire element is metallic, for example steel.
    Also optionally, the fire element is plate-shaped.
    Also optionally, the electrical insulation is an epoxy resin. Thus, the electrical insulation is hard enough to form a protective housing itself, so that it is no longer necessary to provide a housing delimiting a bowl.
    Also optionally, the electrical circuit further comprises at least one electrical connection intended to connect the electrical component to a second electrical conductor, said main, each electrical connection having an electrical conductive section at least ten times less than an electrical conductive section of the first main electrical conductor.
    Also optionally, the electrical component is a controllable switch, for example an insulated gate field effect transistor.
    there is also proposed a switching arm comprising first and second electrical circuits each according to the invention and a magnetic core, in which the first main electrical conductor of the second electrical circuit comprises first and second electrical conductors, called partial, electrically connected to the one to the other, in which the magnetic toroid is wound around the second partial electrical conductor, and in which each electrical connection of the first electrical circuit connects the electrical component of the first electrical circuit to the first partial electrical conductor.
    Optionally, the second partial electrical conductor is electrically connected to the first partial electrical conductor by welding, soldering or screwing.
    Also optionally, the switching arm further comprises a plastic overmolding surrounding the magnetic core and the second partial electric conductor, and the fire-rated element is fixed to the plastic overmolding.
    Also optionally, the fire element has at least one tab, each tab being overmolded in the plastic overmolding to fix the fire element to the plastic overmolding (402).
    A voltage converter is also proposed comprising a switching arm according to the invention and two parts between which the switching arm is intended to extend, in which the fire element has at least one flexible strip intended to be deformed by one of the two parts so as to press the switching arm against the other of the two parts.
    Optionally, one of the two pieces is a heat sink.
    DESCRIPTION OF THE FIGURES
    Figure 1 is an electrical diagram of an electrical system implementing the invention.
    FIG. 2 is a three-dimensional view of a power module of a voltage converter of the electrical system of FIG. 1, without overmolding or fire protection element.
    FIG. 3 is a three-dimensional view of a first sub-module of the power module.
    FIG. 4 is a three-dimensional view of a second sub-module of the power module.
    Figure 5 is a view similar to that of Figure 4, without overmolding.
    Figure 6 is a sectional view of part of the power module, illustrating the arrangement of the fire-rated element.
    Figure 7 is a sectional view of the voltage converter illustrating the positioning of the power module.
    FIG. 8 is a block diagram illustrating the steps of a process for manufacturing the power module.
    DETAILED DESCRIPTION
    With reference to FIG. 1, an electrical system 100 implementing the invention will now be described.
    The electrical system 100 is for example intended to be installed in a motor vehicle.
    The electrical system 100 comprises first of all an electrical supply source 102 designed to deliver a direct voltage U, for example between 20 V and 100 V, for example 48 V. The electrical supply source 102 comprises for example a drums.
    The electrical system 100 further comprises an electrical machine 130 comprising several phases (not shown) intended to present respective phase voltages.
    The electrical system 100 further includes a voltage converter 104 connected between the electrical power source 102 and the electrical machine 130 to perform a conversion between the DC voltage U and the phase voltages.
    The voltage converter 104 firstly comprises a positive bus bar 106 and a negative bus bar 108 intended to be connected to the electrical power source 102 to receive the DC voltage U, the positive bus bar 106 receiving a high electrical potential. and the negative bus bar 108 receiving a low electrical potential.
    The voltage converter 104 further comprises at least one power module 110 comprising one or more phase bus bars 122 intended to be respectively connected to one or more phases of the electric machine 130, to supply their respective phase voltages.
    In the example described, the voltage converter 104 comprises three power modules 110 each comprising two phase bus bars 122 connected to two phases of the electric machine 130.
    More specifically, in the example described, the electric machine 130 comprises two three-phase systems, each comprising three phases. The two three-phase systems are intended to be electrically phase-shifted by 120 ° relative to each other. Preferably, the first phase bus bars 122 of the power modules 110 are respectively connected to the three phases of the first three-phase system, while the second phase bus bars 122 of the power modules 110 are respectively connected to the three phases of the second three-phase system .
    Each power module 110 comprises, for each phase bus bar 122, a high side switch 112 connected between the positive bus bar 106 and the phase bus bar 122 and a low side switch 114 connected between the phase bus bar 122 and the negative bus bar 108. Thus, the switches 112, 114 are arranged so as to form a switching arm, in which the phase bus bar 122 forms a midpoint.
    Each switch 112, 114 has first and second main terminals 116, 118 and a control terminal 120 intended to selectively open and close the switch 112, 114 between its two main terminals 116, 118 as a function of a control signal which applied to it. The switches 112, 114 are preferably transistors, for example field effect transistors with a metal-oxide-semiconductor structure (from the English "Metal Oxide Semiconductor Field Effect Transistor" or MOSFET) having a gate forming the terminal 120, and a drain and a source respectively forming the main terminals 116,118.
    In the example described, the switches 112, 114 each have the shape of a plate, for example substantially rectangular, having an upper face and a lower face. The first main terminal 116 extends on the lower face, while the second main terminal 118 extends on the upper face.
    It will be appreciated that the positive bus bar 106, the negative bus bar 108 and the phase bus bars 122 are rigid electrical conductors designed to withstand electrical currents of at least 1
    A. They preferably have a thickness of at least 1 mm and / or an electrically conductive section of at least 1 mm 2 .
    Furthermore, in the example described, the positive bus bar 106 firstly comprises a positive common bus bar 106A connecting the power modules 110 and, in each power module 110, a local positive bus bar 106B connected to the bar positive common bus 106A. Similarly, the negative bus bar 108 includes a negative common bus bar 108A connecting the power modules 110 and, in each power module 110, a negative local bus bar 108B for each low side switch 114, the negative local bus bars 108B being connected to the negative common bus bar 108A. The connections are represented in FIG. 1 by diamonds.
    Furthermore, in the example described, the positive common bus bar 106A and the negative common bus bar 108A are each formed from a single conductive part.
    In addition, in the example described, the electric machine 130 has both an alternator and an electric motor function. More specifically, the motor vehicle further comprises a heat engine (not shown) having an output axis to which the electric machine 130 is connected by a belt (not shown). The heat engine is intended to drive the wheels of the motor vehicle via its output axis. Thus, in operation as an alternator, the electrical machine supplies electrical energy to the electrical power source 102 from the rotation of the output axis. The voltage converter 104 then functions as a rectifier. In operation as an electric motor, the electric machine drives the output shaft (in addition to or instead of the heat engine). The voltage converter 104 then functions as an inverter.
    The electric machine 130 is for example located in a gearbox or in a clutch of the motor vehicle or in place of the alternator.
    In the following description, the structure and arrangement of the elements of the voltage converter 104 will be described in more detail, with reference to a vertical direction H-B, "H" representing the top and "B" representing the bottom.
    With reference to FIGS. 2 to 7, one of the power modules 110 will now be described in more detail, knowing that the other power modules 110 are similar.
    With reference to FIG. 2, the power module 110 comprises first and second sub-modules.
    The first sub-module includes the positive local bus bar 106B and the negative local bus bars 108B. It also comprises, for each phase bus bar 122, a partial bus bar 202 forming a part of this phase bus bar 122. It further comprises switches 112, 114.
    The bus bars 106B, 202, 108B have the form of horizontal flat plates having a thickness of between 1 mm and 1.5 mm, for example 1.2 mm, and having a horizontal planar upper face. In addition, the bus bars 106B, 202, 108B are coplanar and extend one next to the other, which makes it possible to limit the vertical size of the power module 110.
    The lower face of each high side switch 112 is pressed against the upper face of the positive local bus bar 106B and brazed to the latter in order to mechanically fix the high side switch 112. This fixing also makes it possible to electrically connect its first main terminal at the positive local bus bar 106B. In addition, the first submodule comprises, for each high side switch 112, one or, preferably, several conductive strips 210, for example of aluminum, extending from the upper face of the high side switch 112 considered at 'a respective one of the partial bus bars 202 in order to connect them electrically. The conductive strips 210 preferably have an electrical conductive section at least ten times less than the electrical conductive section of the bus bars 106B, 202,108B.
    Similarly, the lower face of each low side switch 114 is pressed against the upper face of the partial bus bar 202 and brazed to the latter in order to mechanically fix the low side switch 114. This fixing also makes it possible to connect electrically its first main terminal at the phase 122 bus bar.
    In addition, the first sub-module comprises, for each low side switch 114, one or, preferably, several conductive strips 212, for example made of aluminum, extending from the upper face of the low side switch 114 to a respective one of the local negative bus bars 108B in order to connect them electrically. The conductive strips 212 preferably have an electrical conductive section at least ten times less than the electrical conductive section of the bus bars 106B, 202,108B.
    The second sub-module includes another partial bus bar 204 fixed to the partial bus bar 202, for example by soldering, welding or screwing, so that the two are mechanically fixed and electrically connected to each other. Thus, each phase bus bar 122 comprises the two partial bus bars 202, 204.
    With the exception of their ends, the partial bus bars 204 also have the form of horizontal flat plates having a thickness of between 1 mm and 1.5 mm, for example 1.2 mm. One of the ends of the partial bus bars 204 can take a curved shape to facilitate their attachment to the partial bus bars 202.
    The partial busbar 204 also comprises a connection terminal 206 intended to be connected to a phase of the electric machine 130. In general, the shape of the connection terminals 206 is linked to the shape of the terminals of the phases of the electric machine 130.
    The second sub-module comprises, around each partial busbar 204, a magnetic toroid 208 provided with an air gap where an effect sensor
    Hall (not shown) is intended to be arranged in order to measure the phase current passing through the corresponding connection terminal 206.
    With reference to FIG. 3, the first sub-module, designated by the reference 200, further comprises an overmolding of epoxy resin 302 extending around the positive local bus bar 106B, negative local bus bars 108B, bus bars partial 202, switches 112, 114 and conductive strips 210, 212 to protect them. The overmolding of epoxy resin 302 thus forms an electrical insulator covering in particular the bus bars 106B, 202, 108B and the switches 112, 114. The overmolding of epoxy resin 302 has an upper face 304 opposite to the bus bars 106B, 202 , 108B. This upper face 304 is flat and horizontal. The material used for overmolding 302 for example has a flexural limit greater than 80 N / mm 2 , preferably greater than 100 N / mm 2 . For example, the material used for overmolding 302 can be an epoxy resin bearing the name G720E type H whose bending limit is 140 N / mm 2 or an epoxy resin bearing the name XE8495 whose bending limit is 105 N / mm 2 .
    With reference to FIG. 4, the second sub-module, designated by the reference 201, further comprises an overmolding of plastic material 402 extending around the magnetic toroids 208 and the partial bus bars 204, in order to maintain the magnetic toroids 208 mechanically fixed to the partial bus bars 204. The second sub-module 201 further comprises a fire-stop element 404 formed in the written example of a horizontal metal plate fixed on a lower face of the overmolding 402 and projecting from the latter. The metal plate is for example a sheet of steel. The fire-resistant element 404 has at least one flexible strip 406 (three in the example described), preferably located in one of the zones protruding from the underside of the overmold 402. In the example described, each flexible strip 406 is rectangular in shape, one end of which is connected to the rest of the fire-stop element 404 by an upward fold. Each flexible strip 406 is for example obtained by cutting and bending the metal plate forming the fire stop element 404. The fire stop element 404 has for example a thickness of between 0.5 and 1 mm.
    Thus, the complete power module 110 comprises the first submodule 200 as illustrated in FIG. 3 and the second submodule 201 as illustrated in FIG. 4, fixed to each other.
    With reference to FIG. 5, the fire stop element 404 also has three tabs 502 intended to be embedded in the overmold 402 to fix the fire stop element 404 there.
    With reference to FIG. 6, for each switch 112, 114, the fire-stop element 404 extends to less than 1 mm, preferably to less than 0.2 mm, by at least 85% (100% in the example described) of a part 604 of the upper face 304 of the electrical insulator 302 closest to the switch 112, 114 considered. More precisely, this part 604 (represented by thick dotted lines in FIG. 6) groups together at least the points of the upper face 304 of the electrical insulator 302 closest to the switch 112, 114 considered. These points closest to the switch 112, 114 are designated by the reference 606 in FIG. 6. In the example described, the points closest to the switch 112, 114 are those situated vertically from the switch 112, 114. Thus, in the example described, the fire stop element 404 extends at least above the switch 112, 114 to cover it.
    In general, the part 604 groups the points of the upper face 304 of the electrical insulator 302 located at a distance less than or equal to a predefined distance D from the switch 112, 114 considered. This predefined distance D is greater than the thickness E of the overmolding 302 between the switch 112, 114 considered and the upper surface 304 of the overmolding 302, the thickness E corresponding to the minimum distance between the switch 112,114 considered and the upper surface 304 of overmolding 302. The predefined distance D is for example less than 4 mm. In the example described, it is approximately 2 mm.
    During a short circuit of the power module 110, the conductive strips 210, 212 become increasingly hot until they break. However, as they are embedded in the epoxy resin which is hard, the pieces of the conductive strips 210, 212 remain in contact and allow the current to pass. The current which flows then heats the switches 110, 112 and the heat is diffused in the overmolding 302 to its upper face 304 which catches fire. The points closest to each switch 110, 112 are those whose temperature rises first due to the proximity of the switch 110, 112 and are therefore the points to be protected as a priority. Thus, the presence of the firebreak element 404 makes it possible to avoid the spread of fire, or at least to delay it.
    With reference to FIG. 7, the voltage converter 104 comprises a housing 702 delimiting a housing for receiving an electronic card (not shown), for example a printed circuit board, for controlling switches 112, 114. The converter voltage 104 further comprises a heat sink 704 intended to dissipate heat, in particular switches 112, 114. The heat sink 704 comprises in particular fins 706 for heat dissipation. 11 further comprises a barrel for receiving a screw (not shown) for fixing the housing 702 to the heat sink 704.
    Each power module 110 is intended to extend between the housing 702 and the heat sink 704. When the housing 702 is fixed to the heat sink 704, the housing 702 is intended to press on the flexible strip (s) 406 for the deforming so as to press the power module 110 against the heat sink 704. Preferably, the flexible strip (s) 406 are designed so that, once deformed by the housing 702, they transmit a vertical force of at least minus 70 N at the power module 110. Thus, this plating makes it possible to prevent the bus bars from moving away from the heat sink 704 over time. This plating also avoids the use of screws to fix the power modules 110 to the heat sink 704.
    Preferably, the electronic card is housed in the housing 702 and fixed to the latter before the housing 702 is fixed to the heat sink 704 and presses on the flexible strip (s) 406.
    With reference to FIG. 8, a method 800 for manufacturing one of the power modules 110 will now be described.
    During a step 802, the first and second sub-modules 200, 201, without the overmoldings 302, 402, are obtained.
    During a step 804, epoxy resin is injected at low pressure and then crosslinked to form the overmolding of epoxy resin 302. The low pressure injection makes it possible not to damage the conductive strips 210, 212, which are fragile.
    During a step 806, plastic material is injected at high pressure to form the plastic overmolding 402.
    During a step 808, the two sub-modules 200, 201 are fixed to each other. For this, the fire stop element 404 is glued against the upper face 304 of the epoxy resin overmolding 302 and the partial bus bars 204 are fixed to the partial bus bars 202.
    The present invention is not limited to the embodiments described above. It will in fact be apparent to those skilled in the art that modifications can be made to it.
    For example, overmolding 302 could be in a material other than epoxy resin.
    Furthermore, the terms used must not be understood as being limited to the elements of the embodiments described above, but must on the contrary be understood as covering all the equivalent elements which a person skilled in the art can deduce from his general knowledge.
    权利要求:
    Claims (13)
    [1" id="c-fr-0001]
    1. Electrical circuit comprising:
    - a first electrical conductor (106B; 122), said to be main,
    - an electrical component (112; 114) pressed against the first main electrical conductor (106B; 122),
    - an electrical insulator (302) covering the first main electrical conductor (106B; 122) and the electrical component (112; 114), the electrical insulator (302) having an upper face (304) opposite the first electrical conductor main (106B; 122), characterized in that the electrical circuit further comprises a fire-rated element (404) extending at least against 85% of a part (604) of the upper face (304) of the electrical insulation (302) or extending at a predefined distance of at least 85% of a part (604) of the upper face (304) of the electrical insulation (302), this part (604) grouping the point or points from the upper face (304) of the electrical insulator (302) closest to the electrical component (112; 114).
    [2" id="c-fr-0002]
    2. The electrical circuit as claimed in claim 1, in which the predefined distance is less than 1 mm, preferably less than 0.5 and even more preferably 0.2 mm.
    [3" id="c-fr-0003]
    3. The electrical circuit according to claim 1 or 2, wherein the fire stop element (404) is metallic, for example steel.
    [4" id="c-fr-0004]
    4. An electrical circuit according to any one of claims 1 to 3, wherein the fire element (404) is in the form of a plate.
    [5" id="c-fr-0005]
    5. An electrical circuit according to any one of claims 1 to 4, wherein the electrical insulator (302) is an epoxy resin.
    [6" id="c-fr-0006]
    6. An electrical circuit according to any one of claims 1 to 5, further comprising at least one electrical connection (210; 212) intended to connect the electrical component (112; 114) to a second electrical conductor (122; 108B), said main, each electrical connection (210; 212) having an electrical conductive section at least ten times less than an electrical conductive section of the first main electrical conductor (106B; 122).
    [7" id="c-fr-0007]
    7. Electrical circuit according to any one of claims 1 to 6, in which the electrical component (112; 114) is a controllable switch, for example an insulated gate field effect transistor.
    [8" id="c-fr-0008]
    8. Switching arm comprising first and second electrical circuits each according to claims 6 and 7 taken together and a magnetic toroid (208), in which the first main electrical conductor (122) of the second electrical circuit comprises first and second electrical conductors (202; 204), said to be partial, electrically connected to each other, in which the magnetic toroid (208) is wound around the second partial electrical conductor (204), and in which each electrical connection (210) of the first electrical circuit connects the electrical component (112) of the first electrical circuit to the first partial electrical conductor (202).
    [9" id="c-fr-0009]
    9. A switching arm according to claim 8, in which the second partial electrical conductor (204) is electrically connected to the first partial electrical conductor (202) by welding, soldering or screwing.
    [10" id="c-fr-0010]
    10. A switching arm according to claim 8 or 9, further comprising a plastic overmolding (402) surrounding the magnetic core (208) and the second partial electrical conductor (204), and in which the fire-resistant element ( 404) is fixed to the plastic overmolding (402).
    [11" id="c-fr-0011]
    11. A switching arm according to claim 10, in which the fire protection element (404) has at least one tab (502), each tab (502) being overmolded in the plastic overmolding (402) to fix the fire protection element (404) with plastic overmolding (402).
    [12" id="c-fr-0012]
    12. Voltage converter comprising a switching arm according to any one of claims 8 to 11 and two parts (702, 704) between which the switching arm is intended to extend, in which the fire protection element ( 404) has at least one flexible strip (406) intended to be
    5 deformed by one (702) of the two parts so as to press the switching arm against the other (704) of the two parts.
    [13" id="c-fr-0013]
    13. Voltage converter according to claim 12, in which one (704) of the two parts is a heat sink.
    类似技术:
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    同族专利:
    公开号 | 公开日
    FR3082369B1|2021-02-19|
    EP3804111A1|2021-04-14|
    KR20210019069A|2021-02-19|
    WO2019233772A1|2019-12-12|
    CN112425056A|2021-02-26|
    JP2021526004A|2021-09-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2015033062A2|2013-09-09|2015-03-12|Valeo Equipements Electriques Moteur|Electronic assembly for a rotary electric machine for a motor vehicle|
    FR3020727A1|2014-05-05|2015-11-06|Valeo Equip Electr Moteur|POWER MODULE OF AN ELECTRONIC ASSEMBLY FOR A ROTARY ELECTRIC MACHINE FOR A MOTOR VEHICLE|FR3108822A1|2020-03-30|2021-10-01|Valeo Equipements Electriques Moteur|POWER MODULE WITH OVERMOLDING, DEVICES INCLUDING SUCH A POWER MODULE AND METHOD FOR MANUFACTURING A POWER MODULE WITH OVERMOLDING|FR2886506B1|2005-05-31|2011-02-25|Valeo Equip Electr Moteur|ELECTRONIC MODULE FOR ROTATING ELECTRICAL MACHINE|FR3110034A1|2020-05-11|2021-11-12|Valeo Equipements Electriques Moteur|ELECTRIC MODULE WITH OVERMOLDING AND SYSTEMS INCLUDING SUCH AN ELECTRIC MODULE|
    FR3110035A1|2020-05-11|2021-11-12|Valeo Equipements Electriques Moteur|ELECTRICAL MODULE WITH OVERMOLDING AND DEVICES INCLUDING SUCH AN ELECTRICAL MODULE|
    法律状态:
    2019-06-28| PLFP| Fee payment|Year of fee payment: 2 |
    2019-12-13| PLSC| Search report ready|Effective date: 20191213 |
    2020-06-30| PLFP| Fee payment|Year of fee payment: 3 |
    2021-06-30| PLFP| Fee payment|Year of fee payment: 4 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1855035|2018-06-08|
    FR1855035A|FR3082369B1|2018-06-08|2018-06-08|ELECTRICAL CIRCUIT, SWITCHING ARM AND VOLTAGE CONVERTER|FR1855035A| FR3082369B1|2018-06-08|2018-06-08|ELECTRICAL CIRCUIT, SWITCHING ARM AND VOLTAGE CONVERTER|
    KR1020217000519A| KR20210019069A|2018-06-08|2019-05-23|Electrical circuits, switching arms and voltage converters|
    EP19725183.8A| EP3804111A1|2018-06-08|2019-05-23|Electrical circuit, switching arm and voltage converter|
    CN201980047914.4A| CN112425056A|2018-06-08|2019-05-23|Electrical circuit, switching arm and voltage converter|
    JP2020568294A| JP2021526004A|2018-06-08|2019-05-23|Electrical circuits, switching arms, and voltage converters|
    PCT/EP2019/063289| WO2019233772A1|2018-06-08|2019-05-23|Electrical circuit, switching arm and voltage converter|
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