EP3055914A1 - Electrical or electronic device with two supply voltages - Google Patents

Electrical or electronic device with two supply voltages

Info

Publication number
EP3055914A1
EP3055914A1 EP14780882.8A EP14780882A EP3055914A1 EP 3055914 A1 EP3055914 A1 EP 3055914A1 EP 14780882 A EP14780882 A EP 14780882A EP 3055914 A1 EP3055914 A1 EP 3055914A1
Authority
EP
European Patent Office
Prior art keywords
ground
volts
switch module
voltage
interface
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Withdrawn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
EP14780882.8A
Other languages
German (de)
French (fr)
Inventor
Thierry Elbhar
Jonathan FOURNIER
Bertrand Puzenat
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 Thermiques SAS
Original Assignee
Valeo Systemes Thermiques 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 Thermiques SAS filed Critical Valeo Systemes Thermiques SAS
Priority to EP19198747.8A priority Critical patent/EP3614514A1/en
Publication of EP3055914A1 publication Critical patent/EP3055914A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0069—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to the isolation, e.g. ground fault or leak current
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/04—Cutting off the power supply under fault conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/10—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
    • B60L50/11—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines using DC generators and DC motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/20—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having different nominal voltages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/10—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to mechanical injury, e.g. rupture of line, breakage of earth connection
    • H02H5/105—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to mechanical injury, e.g. rupture of line, breakage of earth connection responsive to deterioration or interruption of earth connection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/08—Three-wire systems; Systems having more than three wires
    • H02J1/082—Plural DC voltage, e.g. DC supply voltage with at least two different DC voltage levels
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/10—Parallel operation of dc sources
    • H02J1/108—Parallel operation of dc sources using diodes blocking reverse current flow
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/40—The network being an on-board power network, i.e. within a vehicle
    • H02J2310/46—The network being an on-board power network, i.e. within a vehicle for ICE-powered road vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • the present invention relates to electrical or electronic devices requiring two separate supply voltages.
  • the invention relates in particular, although not exclusively, to the field of motorized vehicles where certain equipment must be designed to operate with two supply voltages of different values, typically a low voltage of the order of 12 volts, and a mean voltage of the order of 48 volts.
  • FIG. 1 schematically illustrates the assembly made for the validation test relating to the leakage currents of an electrical or electronic device 1 comprising a first connector interface 10 for the 12 Volts, and a second connector interface 11 for the 48 Volts.
  • This test consists of connecting all the inputs / outputs of the first connector interface 10 to a first terminal of a DC voltage generator, to connect the inputs of the second connector interface 11 to the second terminal of the DC voltage generator, to apply a voltage of 70 volts by means of the DC voltage generator, and to measure the current by a conventional ammeter.
  • the electrical or electronic device 1 is validated if, during this test, the measured current remains less than or equal to 1 microamp (in absolute value).
  • the second mass loss test consists in connecting the electrical or electronic device between two 12-volt and 48-volt power supplies, simulating the loss of the 48-volt side earth cable and detecting any damage to the ground cable on the other side. 12 Volts.
  • the electrical or electronic device 1 is validated if, during this test, no damage is found after a period of about 30 minutes.
  • FIG. 2 schematically illustrates, in particular, an additional heating module 2 which uses two 12 volts voltages for its power supply, one of which is of low power, represented by the voltage generator 3, the other at a higher power, typically of the order of 1000 to 1200 Watts, represented by the voltage generator 4.
  • additional heater is used to start a motor vehicle to warm up the cabin more quickly.
  • the low power supply 3 is used for the management and the interface of the module 2 while the higher power supply 4 is used to supply the heating resistors (not shown) contained in the module.
  • the higher power supply 4 is used to supply the heating resistors (not shown) contained in the module.
  • only the ground of the voltage generator 4 is connected to the module.
  • the LIN data input of the module is supplied by the voltage generator 3 and the generator 4 ground.
  • Such an architecture could therefore not be used for a 12 Volts / 48 Volts device conforming to the specification mentioned above. above which imposes two separate masses for each supply network.
  • the loss of the ground cable of the generator 4 implies that the module 2 can no longer communicate on its LIN data input.
  • FIG. 3 schematically represents another known architecture of electrical or electronic device 5 used in vehicles electric cars.
  • the device 5 is powered, through two interfaces of connectors 50 and 51, with two very different voltages, a first low voltage of the order of 12 volts, represented by the voltage generator 3, and a second voltage very high, of the order of 400 volts, represented by the voltage generator 6.
  • this type of device 5 must necessarily include an isolation transformer 52 to create a galvanic isolation between the power supply 12 Volts and power at 400 Volts.
  • the object of the invention is to overcome the above disadvantages by proposing a simple architecture of an electrical or electronic device with two supply voltages, for example 12 volts / 48 volts, which meets the requirements of the specification relating to the presence of two terminals. mass, and which makes it possible to satisfy at least one of the two tests mentioned above.
  • the present invention satisfies this objective by proposing an electric or electronic device able to be powered in operation by a first voltage value generated by a first electrical network and by a second voltage value greater than the first voltage value and generated by a first voltage value.
  • second electrical network the device comprising:
  • a first connector interface capable of being connected, under normal connection conditions to a ground conductor and a voltage conductor of the first electrical network
  • each connector interface comprising a ground connection and the ground connections of the two connector interfaces being connected together to form a common ground; and - At least one switch module interposed in series on the common ground, the switch module being adapted to switch to an open position following a change in the connection conditions of the first or the second interface.
  • connection conditions are meant the links necessary for the normal operation of the device, that is to say the usual connections of the connectors interfaces to the two electrical networks.
  • the switch module can be adapted to switch to an open position in case of loss of the ground conductor of the second power grid
  • the switch module can in this case include a positive coefficient of resistance in series on the common ground;
  • the switch module comprises a transistor controlled by a current measuring circuit capable of measuring the current flowing on the common ground;
  • the switch module can be adapted to switch to an open position as soon as all the inputs / outputs of the first connector interface are connected together;
  • the switch module may comprise in this case a MOSFET transistor supplied with voltage by the first electrical network;
  • the switch module is associated with a non-return diode capable of preventing any current flow to the first connector interface when the switch module is in the open position.
  • FIG. 1 already described above, schematically represents the equivalent electric circuit for a leakage current measurement test of a 12 Volts / 48 Volts device prescribed by the aforementioned specification 148;
  • FIG. 2 already described above, schematically illustrates a known architecture for a device using two 12 volt supply voltages;
  • FIG. 3 already described above, schematically illustrates a known architecture for a device using a supply voltage of
  • FIG. 4 schematically illustrates an exemplary architecture of an electrical or electronic device with two supply voltages, for example 12 volts / 48 volts, in accordance with the present invention.
  • FIG. 4 represents an electrical or electronic device 7 according to a possible embodiment of the invention, in the non-limiting context of a dual 12 volts / 48 volts supply.
  • This device 7 is represented in its conditions of use, that is to say receiving a first supply voltage of 12 volts of a first network at 12 volts (represented by a voltage generator 3), and a second higher supply voltage, typically of the order of 48 volts, a second network at 48 volts (represented by a voltage generator 8).
  • the device 7 comprises:
  • a first connector interface 70 capable of being connected to the two terminals of the voltage generator 3, that is to say in practice to the ground conductor GND_12 and to the 12 Volt voltage conductor of the first 12 Volt network;
  • a second interface connector 71 adapted to be connected to the two terminals of the voltage generator 8, that is to say in practice to the ground conductor GND_48 and the voltage conductor 48 Volts of the second network to 48 Volts.
  • the ground connections of the two connector interfaces 70 and 71 are connected together to form a common ground.
  • the device 7 preferably comprises an EMC filtering module 72 (Anglo-Saxon initials set for Electro Magnetic Compatibility) to suppress possible voltage variations, and a module 73 of 12 Volt / 48 Volt interface which integrates the features specific to the device.
  • EMC filtering module 72 Anglo-Saxon initials set for Electro Magnetic Compatibility
  • module 73 12 Volt / 48 Volt interface which integrates the features specific to the device.
  • the module 73 will include the management components and the interface as well as the heating resistors.
  • the device 7 further comprises a first switch module 74 interposed in series on the common ground connecting the two ground connections of the connection interfaces 70 and 71, this first switch module 74 being able to be controlled in a closed position as long as the current the through is less than a threshold value of the order of 200 mA approximately, and to switch to the open position if the current passing through it passes above the threshold value.
  • This first switch module 74 can be made by the combination of a current measuring circuit, typically composed of an amplifier and a comparator, and a MOSFET transistor controlled to open the ground circuit as soon as the current measurement circuit detects a current greater than the threshold value.
  • this switch module 74 will be composed of a resettable fuse, for example a positive temperature coefficient resistor or PTC resistor, of infinite value if the current flowing through the resistor is much greater than the threshold value.
  • the device 7 further comprises a second switch module 75 also in series on the common ground, associated with a non-return diode 76.
  • the second switch module is for example a MOSFET transistor powered by the 12-volt network, it is that is to say, the source S and the drain D are respectively connected to the ground connection of the connection module 70 and to the ground connection of the connection module 71, and whose gate G receives the voltage 12 volts. In normal operation, this MOSFET transistor is typically in the closed position and its voltage VGS between the gate and the source is then equal to 12 volts.
  • the diode 76 will do as for it pass the current in the direction 12 Volts to the module 73 interface 12V / 48 V.
  • this second switch module 75 allows the device 7 to meet the leakage current measurement test. Indeed, by carrying out this test (in accordance with the electrical diagram of FIG. 1), all the inputs / outputs of the first connector interface 70 are connected together, so that the voltage VGS becomes zero, even by applying the voltage of 70 volts imposed by the test, and switches the transistor in its open position.
  • the non-return diode 76 guarantees that no current can flow in the other direction, that is to say from the second connector interface 71 to the first connector interface 70.
  • each of the two switch modules 74 and 75 described above is able to switch to an open position following a modification of the connection conditions of the first interface or the second interface: in particular, for the measurement test leakage currents, the connections of the connector interface 70 are modified compared to normal operation, hence the closure of the switch module 75.
  • the loss (disconnection or damaged cable) of the ground cable GN D_48 constitutes a modification of the normal connection conditions of the second interface 71 of connectors, resulting in the closure of the switch module 74.
  • the device 7 may of course comprise only one of these switch modules, without departing from the scope of the invention.
  • the device obtained meets various points required by the specification 148, while having a simple structure, inexpensive and compact.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Protection Of Static Devices (AREA)
  • Direct Current Feeding And Distribution (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

An electrical or electronic device (7) capable of being supplied with two different values of voltage from respectively a first electrical network (3) and from a second electrical network (8), comprises: a first connecting interface (70) capable of being linked, under normal connection conditions, with a ground conductor (GND_12) and a voltage conductor of the first electrical network (3); a second connecting interface (71) capable of being linked, under normal connection conditions, with the ground conductor (GND_48) and a voltage conductor of the second electrical network (8); the ground connections of the two connecting interfaces (70, 71) being linked together to form a common ground; and at least one switch module (74; 75) interposed in series on the common ground, the switch module being capable of switching into an open position following a modification in the connection conditions of the first or second interface.

Description

DISPOSITIF ELECTRIQUE OU ELECTRONIQUE A DEUX TENSIONS  ELECTRICAL OR ELECTRONIC DEVICE HAVING TWO VOLTAGES
D'ALIMENTATION  POWER
La présente invention concerne les dispositifs électriques ou électroniques nécessitant deux tensions d'alimentation distinctes. The present invention relates to electrical or electronic devices requiring two separate supply voltages.
L'invention concerne notamment, bien que non exclusivement, le domaine des véhicules motorisés où certains équipements doivent être conçus pour fonctionner avec deux tensions d'alimentation de valeurs distinctes, typiquement une tension basse de l'ordre de 12 Volts, et une tension moyenne de l'ordre de 48 Volts.  The invention relates in particular, although not exclusively, to the field of motorized vehicles where certain equipment must be designed to operate with two supply voltages of different values, typically a low voltage of the order of 12 volts, and a mean voltage of the order of 48 volts.
Pour ce type d'équipements, une spécification définissant notamment certaines règles d'architecture et des tests de validation est actuellement en cours de développement par un Consortium de constructeurs automobiles. Cette spécification (« Electrical and Electronic components in the vehicle 48 V - vehicle electrical System, Requirement and tests », spécification 148 du 29/08/2011) requiert en particulier :  For this type of equipment, a specification defining in particular certain architectural rules and validation tests is currently being developed by a consortium of car manufacturers. This specification ("Electrical and Electronic components in the vehicle 48V - vehicle electrical System, Requirement and tests", specification 148 of 29/08/2011) requires in particular:
- que tout équipement 12 Volts/48 Volts possède une masse commune, et inclue une interface de connectique 12 Volts pour permettre sa connexion au réseau véhicule de 12 Volts, et une interface de connectique 48 Volts pour permettre sa connexion au réseau véhicule de 48 Volts, chaque interface de connectique ayant sa propre connexion de masse ;  - that all 12 volts / 48 volts equipment has a common ground, and includes a 12 volts connection interface to allow its connection to the 12 volts vehicle network, and a 48 volts connection interface to allow its connection to the 48 volts vehicle network each connector interface having its own ground connection;
- que tout équipement 12 Volts/48 Volts satisfasse à un test de mesure des courants de fuite, de manière à garantir que les alimentations de 48 Volts et de 12 Volts sont bien protégées contre ces courants de fuite ;  - that all 12 Volt / 48 Volt equipment satisfies a leakage current measurement test, so as to ensure that the 48 Volt and 12 Volt power supplies are well protected against these leakage currents;
- que tout équipement 12 Volts/48 Volts satisfasse à un test de perte du câble de masse du réseau 48 Volts, de manière à garantir que le câble de masse du réseau 12 Volts ne risque pas d'être endommagé suite à un défaut dans le câble de masse du réseau 48 Volts.  - that all 12 volts / 48 volts equipment satisfies a 48 volts network cable ground cable test, so as to ensure that the 12 volts network cable is not damaged by a fault in the system. 48 Volts network ground cable.
La figure 1 illustre schématiquement le montage réalisé pour le test de validation relatif aux courants de fuite d'un dispositif électrique ou électronique 1 comprenant une première interface connectique 10 pour le 12 Volts, et une seconde interface connectique 11 pour le 48 Volts. Ce test consiste à relier toutes les entrées/sorties de la première interface de connectique 10 à une première borne d'un générateur de tension continue, à relier les entrées de la seconde interface de connectique 11 à la deuxième borne du générateur de tension continue, à appliquer une tension de 70 Volts au moyen du générateur de tension continue, et à mesurer le courant par un ampèremètre classique. Le dispositif électrique ou électronique 1 est validé si, lors de ce test, le courant mesuré reste inférieur ou égal à 1 microampère (en valeur absolue). FIG. 1 schematically illustrates the assembly made for the validation test relating to the leakage currents of an electrical or electronic device 1 comprising a first connector interface 10 for the 12 Volts, and a second connector interface 11 for the 48 Volts. This test consists of connecting all the inputs / outputs of the first connector interface 10 to a first terminal of a DC voltage generator, to connect the inputs of the second connector interface 11 to the second terminal of the DC voltage generator, to apply a voltage of 70 volts by means of the DC voltage generator, and to measure the current by a conventional ammeter. The electrical or electronic device 1 is validated if, during this test, the measured current remains less than or equal to 1 microamp (in absolute value).
Le deuxième test de perte de masse consiste à connecter le dispositif électrique ou électronique entre deux alimentations 12 Volts et 48 Volts, à simuler la perte du câble de masse du côté 48 Volts et à constater d'éventuels dommages sur le câble de masse du côté 12 Volts. Le dispositif électrique ou électronique 1 est validé si, lors de ce test, aucun dommage n'est constaté au bout d'une durée d'environ 30 minutes.  The second mass loss test consists in connecting the electrical or electronic device between two 12-volt and 48-volt power supplies, simulating the loss of the 48-volt side earth cable and detecting any damage to the ground cable on the other side. 12 Volts. The electrical or electronic device 1 is validated if, during this test, no damage is found after a period of about 30 minutes.
On connaît déjà des architectures de dispositifs électriques ou électroniques susceptibles de fonctionner avec deux tensions d'alimentation. La figure 2 illustre en particulier de façon schématique un module réchauffeur additionnel 2 qui utilise pour son alimentation deux tensions de 12 Volts, l'une à faible puissance, représentée par le générateur de tension 3, l'autre à une puissance plus forte, typiquement de l'ordre de 1000 à 1200 Watts, représentée par le générateur de tension 4. Un tel réchauffeur additionnel est utilisé au démarrage d'un véhicule automobile pour réchauffer plus rapidement l'habitacle. L'alimentation à faible puissance 3 est utilisée pour la gestion et l'interface du module 2 alors que l'alimentation à plus forte puissance 4 est utilisée pour alimenter les résistances chauffantes (non représentées) contenues dans le module. Comme on le voit sur l'architecture de la figure 2, seule la masse du générateur de tension 4 est connectée au module. De plus, l'entrée de données LIN du module est alimentée par le générateur de tension 3 et la masse du générateur 4. Une telle architecture ne pourrait donc pas être utilisée pour un dispositif 12 Volts/48 Volts conforme à la spécification citée ci- dessus qui impose deux masses distinctes pour chaque réseau d'alimentation. En outre, la perte du câble de masse du générateur 4 implique que le module 2 ne peut plus communiquer sur son entrée de données LIN .  Already known architectures of electrical or electronic devices capable of operating with two supply voltages. FIG. 2 schematically illustrates, in particular, an additional heating module 2 which uses two 12 volts voltages for its power supply, one of which is of low power, represented by the voltage generator 3, the other at a higher power, typically of the order of 1000 to 1200 Watts, represented by the voltage generator 4. Such additional heater is used to start a motor vehicle to warm up the cabin more quickly. The low power supply 3 is used for the management and the interface of the module 2 while the higher power supply 4 is used to supply the heating resistors (not shown) contained in the module. As can be seen in the architecture of FIG. 2, only the ground of the voltage generator 4 is connected to the module. In addition, the LIN data input of the module is supplied by the voltage generator 3 and the generator 4 ground. Such an architecture could therefore not be used for a 12 Volts / 48 Volts device conforming to the specification mentioned above. above which imposes two separate masses for each supply network. In addition, the loss of the ground cable of the generator 4 implies that the module 2 can no longer communicate on its LIN data input.
La figure 3 représente schématiquement une autre architecture connue de dispositif électrique ou électronique 5 utilisée dans les véhicules automobiles électriques. Ici, le dispositif 5 est alimenté, au travers de deux interfaces de connectique 50 et 51, avec deux tensions très différentes, une première tension faible de l'ordre de 12 Volts, représentée par le générateur de tension 3, et une deuxième tension très haute, de l'ordre de 400 Volts, représentée par le générateur de tension 6. Pour des questions de sécurité, ce type de dispositif 5 doit comporter obligatoirement un transformateur d'isolement 52 afin de créer une isolation galvanique entre l'alimentation à 12 Volts et l'alimentation à 400 Volts. FIG. 3 schematically represents another known architecture of electrical or electronic device 5 used in vehicles electric cars. Here, the device 5 is powered, through two interfaces of connectors 50 and 51, with two very different voltages, a first low voltage of the order of 12 volts, represented by the voltage generator 3, and a second voltage very high, of the order of 400 volts, represented by the voltage generator 6. For safety reasons, this type of device 5 must necessarily include an isolation transformer 52 to create a galvanic isolation between the power supply 12 Volts and power at 400 Volts.
Une architecture similaire pourrait être utilisée pour réaliser un dispositif électrique ou électronique 12 Volts/48 Volts compatible avec la spécification citée ci-avant. Néanmoins, cette solution est coûteuse et encombrante, du fait de l'utilisation d'un transformateur d'isolement, et reste complexe à mettre en œuvre.  A similar architecture could be used to make a 12 volts / 48 volts electrical or electronic device compatible with the specification mentioned above. Nevertheless, this solution is expensive and cumbersome, because of the use of an isolation transformer, and remains complex to implement.
L'invention a pour objectif de pallier les inconvénients précédents en proposant une architecture simple de dispositif électrique ou électronique à deux tensions d'alimentation, par exemple 12 Volts/48 Volts, qui réponde aux exigences de la spécification relatives à la présence de deux bornes de masse, et qui permette de satisfaire à au moins l'un des deux tests précités.  The object of the invention is to overcome the above disadvantages by proposing a simple architecture of an electrical or electronic device with two supply voltages, for example 12 volts / 48 volts, which meets the requirements of the specification relating to the presence of two terminals. mass, and which makes it possible to satisfy at least one of the two tests mentioned above.
La présente invention répond à cet objectif en proposant un dispositif électrique ou électronique apte à être alimenté en fonctionnement par une première valeur de tension générée par un premier réseau électrique et par une deuxième valeur de tension supérieure à la première valeur de tension et générée par un deuxième réseau électrique, le dispositif comportant :  The present invention satisfies this objective by proposing an electric or electronic device able to be powered in operation by a first voltage value generated by a first electrical network and by a second voltage value greater than the first voltage value and generated by a first voltage value. second electrical network, the device comprising:
- une première interface de connectique apte à être reliée, dans des conditions de liaison normales à un conducteur de masse et un conducteur de tension du premier réseau électrique ;  a first connector interface capable of being connected, under normal connection conditions to a ground conductor and a voltage conductor of the first electrical network;
- une deuxième interface de connectique apte à être reliée, dans lesdites conditions de liaison normales, à un conducteur de masse et un conducteur de tension du deuxième réseau électrique ;  a second interface of connectors able to be connected, in said normal connection conditions, to a ground conductor and a voltage conductor of the second electrical network;
chaque interface de connectique comportant une connexion de masse et les connexions de masse des deux interfaces de connectique étant reliées ensemble pour former une masse commune ; et - au moins un module interrupteur interposé en série sur la masse commune, le module interrupteur étant apte à basculer dans une position ouverte suite à une modification des conditions de liaison de la première ou de la deuxième interface. each connector interface comprising a ground connection and the ground connections of the two connector interfaces being connected together to form a common ground; and - At least one switch module interposed in series on the common ground, the switch module being adapted to switch to an open position following a change in the connection conditions of the first or the second interface.
Par conditions de liaison normales, on entend les liaisons nécessaires au fonctionnement normal du dispositif, c'est-à-dire les connexions habituelles des interfaces de connectique aux deux réseaux électriques.  By normal connection conditions are meant the links necessary for the normal operation of the device, that is to say the usual connections of the connectors interfaces to the two electrical networks.
Selon d'autres caractéristiques possibles particulièrement avantageuses :  According to other particularly advantageous characteristics:
- le module interrupteur peut être apte à basculer dans une position ouverte en cas de perte du conducteur de masse du deuxième réseau électrique ;  - The switch module can be adapted to switch to an open position in case of loss of the ground conductor of the second power grid;
- le module interrupteur peut dans ce cas comprendre une résistance à coefficient positif en série sur la masse commune ;  - The switch module can in this case include a positive coefficient of resistance in series on the common ground;
- En variante, le module interrupteur comprend un transistor commandé par un circuit de mesure de courant apte à mesurer le courant circulant sur la masse commune ;  - Alternatively, the switch module comprises a transistor controlled by a current measuring circuit capable of measuring the current flowing on the common ground;
- le module interrupteur peut être apte à basculer dans une position ouverte dès lors que toutes les entrées/sorties de la première interface de connectique sont reliées ensemble ;  - The switch module can be adapted to switch to an open position as soon as all the inputs / outputs of the first connector interface are connected together;
- le module interrupteur peut comporter dans ce cas un transistor MOSFET alimenté en tension par le premier réseau électrique ;  - The switch module may comprise in this case a MOSFET transistor supplied with voltage by the first electrical network;
- le module interrupteur est associé à une diode anti-retour apte à empêcher tout courant de circuler vers la première interface de connectique lorsque le module interrupteur est en position ouverte.  - The switch module is associated with a non-return diode capable of preventing any current flow to the first connector interface when the switch module is in the open position.
L'invention et les avantages qu'elle procure seront mieux compris au vu de la description suivante d'un exemple non limitatif de mise en œuvre de l'invention, faite en référence aux figures annexées, dans lesquelles : The invention and the advantages it provides will be better understood from the following description of a nonlimiting example of implementation of the invention, with reference to the appended figures, in which:
- la figure 1, déjà décrite ci-avant, représente schématiquement le circuit électrique équivalent pour un test de mesure de courant de fuite d'un dispositif 12 Volts/ 48 Volts prescrit par la spécification 148 précitée ; - la figure 2, déjà décrite ci-avant, illustre schématiquement une architecture connue pour un dispositif utilisant deux tensions d'alimentation de 12 Volts ; FIG. 1, already described above, schematically represents the equivalent electric circuit for a leakage current measurement test of a 12 Volts / 48 Volts device prescribed by the aforementioned specification 148; FIG. 2, already described above, schematically illustrates a known architecture for a device using two 12 volt supply voltages;
- la figure 3, déjà décrite ci-avant, illustre schématiquement une architecture connue pour un dispositif utilisant une tension d'alimentation de FIG. 3, already described above, schematically illustrates a known architecture for a device using a supply voltage of
12 Volts et une tension d'alimentation de 400 Volts ; 12 volts and a supply voltage of 400 volts;
- la figure 4 illustre schématiquement un exemple d'architecture d'un dispositif électrique ou électronique à deux tensions d'alimentation, par exemple 12 Volts/48 Volts, conforme à la présente invention.  FIG. 4 schematically illustrates an exemplary architecture of an electrical or electronic device with two supply voltages, for example 12 volts / 48 volts, in accordance with the present invention.
La figure 4 représente un dispositif électrique ou électronique 7 selon un mode de réalisation possible de l'invention, dans le cadre non limitatif d'une double alimentation 12 Volts/ 48 Volts. Ce dispositif 7 est représenté dans ses conditions d'utilisation, c'est-à-dire recevant une première tension d'alimentation de 12 Volts d'un premier réseau à 12 Volts (représenté par un générateur de tension 3), et une deuxième tension d'alimentation plus élevée, typiquement de l'ordre de 48 Volts, d'un second réseau à 48 Volts (représenté par un générateur de tension 8). Pour ce faire, le dispositif 7 comporte : FIG. 4 represents an electrical or electronic device 7 according to a possible embodiment of the invention, in the non-limiting context of a dual 12 volts / 48 volts supply. This device 7 is represented in its conditions of use, that is to say receiving a first supply voltage of 12 volts of a first network at 12 volts (represented by a voltage generator 3), and a second higher supply voltage, typically of the order of 48 volts, a second network at 48 volts (represented by a voltage generator 8). To do this, the device 7 comprises:
- une première interface de connectique 70 apte à être reliée aux deux bornes du générateur de tension 3, c'est-à-dire en pratique au conducteur de masse GND_12 et au conducteur de tension 12 Volts du premier réseau à 12 Volts ;  a first connector interface 70 capable of being connected to the two terminals of the voltage generator 3, that is to say in practice to the ground conductor GND_12 and to the 12 Volt voltage conductor of the first 12 Volt network;
- une deuxième interface de connectique 71 apte à être reliée aux deux bornes du générateur de tension 8, c'est-à-dire en pratique au conducteur de masse GND_48 et au conducteur de tension 48 Volts du second réseau à 48 Volts.  - A second interface connector 71 adapted to be connected to the two terminals of the voltage generator 8, that is to say in practice to the ground conductor GND_48 and the voltage conductor 48 Volts of the second network to 48 Volts.
A l'intérieur du dispositif 7, les connexions de masse des deux interfaces de connectique 70 et 71 sont reliées ensemble pour former une masse commune.  Inside the device 7, the ground connections of the two connector interfaces 70 and 71 are connected together to form a common ground.
Entre les deux interfaces de connectiques 70 et 71, le dispositif 7 comporte, de manière préférentielle, un module 72 de filtrage EMC (initiales anglo-saxonnes mises pour Electro Magnetic Compatibility) pour supprimer de possibles variations de tensions, et un module 73 d'interface 12 Volts/ 48 Volts qui intègre les fonctionnalités propres au dispositif. Par exemple, si le dispositif 7 est un réchauffeur additionnel, le module 73 comportera les composants de gestion et l'interface ainsi que les résistances chauffantes. Between the two connectors interfaces 70 and 71, the device 7 preferably comprises an EMC filtering module 72 (Anglo-Saxon initials set for Electro Magnetic Compatibility) to suppress possible voltage variations, and a module 73 of 12 Volt / 48 Volt interface which integrates the features specific to the device. For example, if the device 7 is an additional heater, the module 73 will include the management components and the interface as well as the heating resistors.
Le dispositif 7 comporte en outre un premier module interrupteur 74 interposé en série sur la masse commune reliant les deux connexions de masse des interfaces de connectique 70 et 71, ce premier module interrupteur 74 étant apte à être commandé dans une position fermée tant que le courant le traversant est inférieur à une valeur seuil de l'ordre de 200 mA approximativement, et à basculer en position ouverte si le courant le traversant passe au-dessus de la valeur seuil .  The device 7 further comprises a first switch module 74 interposed in series on the common ground connecting the two ground connections of the connection interfaces 70 and 71, this first switch module 74 being able to be controlled in a closed position as long as the current the through is less than a threshold value of the order of 200 mA approximately, and to switch to the open position if the current passing through it passes above the threshold value.
Ce premier module interrupteur 74 peut être réalisé par l'association d'un circuit de mesure de courant, composé typiquement d'un amplificateur et d'un comparateur, et d'un transistor de type MOSFET commandé pour ouvrir le circuit de masse dès que le circuit de mesure de courant détecte un courant supérieur à la valeur seuil .  This first switch module 74 can be made by the combination of a current measuring circuit, typically composed of an amplifier and a comparator, and a MOSFET transistor controlled to open the ground circuit as soon as the current measurement circuit detects a current greater than the threshold value.
En variante et de manière préférentielle, ce module interrupteur 74 sera composé d'un fusible réarmable, par exemple une résistance à coefficient de température positif ou résistance CTP, de valeur infinie si le courant traversant la résistance est très supérieur à la valeur seuil .  In a variant and preferably, this switch module 74 will be composed of a resettable fuse, for example a positive temperature coefficient resistor or PTC resistor, of infinite value if the current flowing through the resistor is much greater than the threshold value.
La présence de ce premier module interrupteur 74 permet au dispositif The presence of this first switch module 74 allows the device
7 de satisfaire au test de la perte du câble de masse GND_48. En effet, si le câble de masse GN D_48 est sectionné, un courant important va passer au travers de la masse commune et provoquer l'ouverture de l'interrupteur 74. 7 to meet the GND_48 ground cable loss test. Indeed, if the ground cable GN D_48 is cut, a large current will pass through the common ground and cause the opening of the switch 74.
Le dispositif 7 comporte en outre un deuxième module interrupteur 75 également en série sur la masse commune, associé à une diode anti-retour 76. Le deuxième module interrupteur est par exemple un transistor de type MOSFET alimenté par le réseau 12 Volts, c'est-à-dire dont la source S et le drain D sont reliés respectivement à la connexion de masse du module de connectique 70 et à la connexion de masse du module de connectique 71, et dont la grille G reçoit la tension 12 Volts. En fonctionnement normal, ce transistor MOSFET se trouve classiquement en position fermée puis sa tension VGS entre la Grille et la source est alors égale à 12 Volts. La diode 76 va faire quant à elle passer le courant dans le sens 12 Volts vers le module 73 d'interface 12V/48 V. The device 7 further comprises a second switch module 75 also in series on the common ground, associated with a non-return diode 76. The second switch module is for example a MOSFET transistor powered by the 12-volt network, it is that is to say, the source S and the drain D are respectively connected to the ground connection of the connection module 70 and to the ground connection of the connection module 71, and whose gate G receives the voltage 12 volts. In normal operation, this MOSFET transistor is typically in the closed position and its voltage VGS between the gate and the source is then equal to 12 volts. The diode 76 will do as for it pass the current in the direction 12 Volts to the module 73 interface 12V / 48 V.
L'intérêt de ce deuxième module interrupteur 75 est de permettre au dispositif 7 de satisfaire au test de mesure des courants de fuite. En effet, en réalisant ce test (conformément au schéma électrique de la figure 1), toutes les entrées/sorties de la première interface de connectique 70 sont reliées entre elles, de sorte que la tension VGS devient nulle, même en appliquant la tension de 70 Volts imposée par le test, et fait basculer le transistor dans sa position ouverte. La diode anti-retour 76 garantit quant à elle qu'aucun courant ne pourra circuler dans l'autre sens, c'est-à-dire depuis la deuxième interface de connectique 71 vers la première interface de connectique 70.  The advantage of this second switch module 75 is to allow the device 7 to meet the leakage current measurement test. Indeed, by carrying out this test (in accordance with the electrical diagram of FIG. 1), all the inputs / outputs of the first connector interface 70 are connected together, so that the voltage VGS becomes zero, even by applying the voltage of 70 volts imposed by the test, and switches the transistor in its open position. The non-return diode 76 guarantees that no current can flow in the other direction, that is to say from the second connector interface 71 to the first connector interface 70.
Au vu de ce qui précède, chacun des deux modules interrupteurs 74 et 75 décrits précédemment est apte à basculer dans une position ouverte suite à une modification des conditions de liaison de la première ou de la deuxième interface : en particulier, pour le test de mesure des courants de fuite, les liaisons de l'interface de connectique 70 sont modifiées par rapport au fonctionnement normal, d'où la fermeture du module interrupteur 75. De manière similaire, la perte (déconnexion ou câble endommagé) du câble de masse GN D_48 constitue une modification des conditions de liaison normale de la deuxième interface 71 de connectique, ayant pour conséquence la fermeture du module interrupteur 74.  In view of the foregoing, each of the two switch modules 74 and 75 described above is able to switch to an open position following a modification of the connection conditions of the first interface or the second interface: in particular, for the measurement test leakage currents, the connections of the connector interface 70 are modified compared to normal operation, hence the closure of the switch module 75. Similarly, the loss (disconnection or damaged cable) of the ground cable GN D_48 constitutes a modification of the normal connection conditions of the second interface 71 of connectors, resulting in the closure of the switch module 74.
Le dispositif 7 peut bien entendu comporter un seul des ces modules interrupteurs, sans départir du cadre de l'invention .  The device 7 may of course comprise only one of these switch modules, without departing from the scope of the invention.
Dans tous les cas, le dispositif obtenu répond à divers points requis par la spécification 148, tout en ayant une structure simple, peu coûteuse et à faible encombrement.  In all cases, the device obtained meets various points required by the specification 148, while having a simple structure, inexpensive and compact.
Bien que l'invention ait été décrite dans le cadre de l'application 12 Volts/48 Volts du domaine automobile, elle peut trouver un intérêt dans tous les cas où un dispositif requiert une double alimentation à des valeurs de tension dites sécuritaires.  Although the invention has been described in the context of the application 12 volts / 48 volts of the automotive field, it may find an interest in all cases where a device requires a dual power supply to so-called safe voltage values.

Claims

REVENDICATIONS
Dispositif électrique ou électronique (7) apte à être alimenté en fonctionnement par une première valeur de tension générée par un premier réseau électrique (3) et par une deuxième valeur de tension supérieure à la première valeur de tension et générée par un deuxième réseau électrique (8), le dispositif comportant :  Electrical or electronic device (7) adapted to be powered in operation by a first voltage value generated by a first electrical network (3) and by a second voltage value greater than the first voltage value and generated by a second electrical network ( 8), the device comprising:
- une première interface (70) de connectique apte à être reliée, dans des conditions de liaison normales, à un conducteur de masse (GND_12) et un conducteur de tension du premier réseau électrique (3) ;  - a first interface (70) of connectors adapted to be connected, under normal connection conditions, to a ground conductor (GND_12) and a voltage conductor of the first electrical network (3);
- une deuxième interface (71) de connectique apte à être reliée, dans lesdites conditions de liaison normales, à un conducteur de masse (GND_48) et un conducteur de tension du deuxième réseau électrique (8) ;  a second interface (71) of connectors that can be connected, in said normal connection conditions, to a ground conductor (GND_48) and a voltage conductor of the second electrical network (8);
chaque interface de connectique comportant une connexion de masse et les connexions de masse des deux interfaces (70, 71) de connectique étant reliées ensemble pour former une masse commune ; et each connector interface comprising a ground connection and the ground connections of the two connector interfaces (70, 71) being connected together to form a common ground; and
- au moins un module interrupteur (74 ; 75) interposé en série sur la masse commune, le module interrupteur étant apte à basculer dans une position ouverte suite à une modification des conditions de liaison de la première ou de la deuxième interface.  - At least one switch module (74; 75) interposed in series on the common ground, the switch module being adapted to switch to an open position following a change in the connection conditions of the first or the second interface.
Dispositif selon la revendication 1, caractérisé en ce que ledit module interrupteur (74) est apte à basculer dans une position ouverte en cas de perte du conducteur de masse (GND_48) du deuxième réseau électrique (8).  Device according to claim 1, characterized in that said switch module (74) is adapted to switch to an open position in case of loss of the ground conductor (GND_48) of the second electrical network (8).
Dispositif selon la revendication 2, caractérisé en ce que ledit module interrupteur (74) comprend une résistance à coefficient positif en série sur la masse commune. Device according to claim 2, characterized in that said switch module (74) comprises a positive coefficient of resistance in series on the common ground.
Dispositif selon la revendication 2, caractérisé en ce que ledit module interrupteur (74) comprend un transistor commandé par un circuit de mesure de courant apte à mesurer le courant circulant sur la masse commune. Device according to claim 2, characterized in that said switch module (74) comprises a transistor controlled by a circuit of current measurement able to measure the current flowing on the common ground.
Dispositif selon la revendication 1, caractérisé en ce que ledit module interrupteur (75) est apte à basculer dans une position ouverte dès lors que toutes les entrées/sorties de la première interface de connectique sont reliées ensemble. Device according to claim 1, characterized in that said switch module (75) is able to switch to an open position as soon as all the inputs / outputs of the first connector interface are connected together.
Dispositif selon la revendication 5, caractérisé en ce que ledit module interrupteur (75) comporte un transistor MOSFET alimenté en tension par le premier réseau électrique (3). Device according to claim 5, characterized in that said switch module (75) comprises a MOSFET transistor supplied with voltage by the first electrical network (3).
Dispositif selon l'une quelconque des revendications 5 ou 6, caractérisé en ce que le module interrupteur (75) est associé à une diode antiretour (76) apte à empêcher tout courant de circuler vers la première interface de connectique (70) lorsque le module interrupteur (75) est en position ouverte. Device according to any one of claims 5 or 6, characterized in that the switch module (75) is associated with a non-return diode (76) able to prevent any current from flowing to the first connector interface (70) when the module switch (75) is in the open position.
Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la première valeur de tension est de 12 Volts, et la deuxième valeur de tension est de 48 Volts. Device according to any one of the preceding claims, characterized in that the first voltage value is 12 volts, and the second voltage value is 48 volts.
EP14780882.8A 2013-10-10 2014-10-06 Electrical or electronic device with two supply voltages Withdrawn EP3055914A1 (en)

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FR3011989A1 (en) 2015-04-17
US10106041B2 (en) 2018-10-23
EP3614514A1 (en) 2020-02-26
KR20160065974A (en) 2016-06-09
JP6250801B2 (en) 2017-12-20
US20160264004A1 (en) 2016-09-15
CN105830300A (en) 2016-08-03
FR3011989B1 (en) 2019-04-05
KR101873130B1 (en) 2018-06-29
WO2015052137A1 (en) 2015-04-16
JP2016536958A (en) 2016-11-24
CN105830300B (en) 2018-07-24

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