EP3646364B1 - Electrical system for controlling a functional member and system for driving the wheels of a motor vehicle - Google Patents

Electrical system for controlling a functional member and system for driving the wheels of a motor vehicle Download PDF

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Publication number
EP3646364B1
EP3646364B1 EP18737665.2A EP18737665A EP3646364B1 EP 3646364 B1 EP3646364 B1 EP 3646364B1 EP 18737665 A EP18737665 A EP 18737665A EP 3646364 B1 EP3646364 B1 EP 3646364B1
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EP
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Prior art keywords
designed
electrical
controllable switch
functional component
integrated circuit
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EP18737665.2A
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German (de)
French (fr)
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EP3646364A1 (en
Inventor
Amélie THIONVILLE
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Valeo Systemes de Controle Moteur SAS
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Valeo Systemes de Controle Moteur SAS
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current

Definitions

  • the present invention relates to the field of controlling a functional organ in a secure manner.
  • control device is further designed to detect a failure of the electrical device and, in the event of detection of a failure, to control the first switch to open with the effect of disconnecting the functional member from the electrical source .
  • the aim of the invention is to propose an electrical system for controlling a functional organ that is more secure than those presented above.
  • the functional member can be disconnected from the electrical source even in the event of failure of the first controllable switch.
  • the functional member is placed between the first controllable switch and the second controllable switch.
  • the first controllable switch is placed between the functional member and the electrical supply terminals intended to be connected to the negative terminal of the electrical source.
  • the second controllable switch is placed between the functional member and the electrical supply terminals intended to be connected to the positive terminal of the electrical source.
  • the first controllable switch is a switch normally farm.
  • the second controllable switch is a normally open switch.
  • the functional member is designed to be alternately connected and disconnected from the electrical source according to a certain cyclical ratio, equal to the disconnection time relative to the time of a period, and the functional member is designed to selectively take a first state when the duty cycle is less than a predefined threshold and a second state when the duty cycle is greater than the predefined threshold.
  • the electrical device further comprises a resistance placed between the first controllable switch and one of the electrical power supply terminals, and the control device is designed to detect a failure of the electrical device from a current flowing through the resistance and/or a voltage across the resistance.
  • control device comprises a first integrated circuit designed to control the first controllable switch and a second integrated circuit designed to control the second controllable switch.
  • the first integrated circuit is configured to monitor the second integrated circuit to detect a failure of the second integrated circuit
  • the second integrated circuit is configured to monitor the first integrated circuit to detect a failure of the first integrated circuit
  • the functional member is an electromechanical actuator designed to control a clutch.
  • the single figure schematically represents a rear wheel drive system of a motor vehicle implementing the invention.
  • the drive system 100 firstly comprises the rear wheels 102 of the motor vehicle.
  • the drive system 100 further includes an electric motor 104 designed to drive the rear wheels 102.
  • the drive system 100 further includes a clutch 106 configured to be activated to connect the electric motor 104 to the rear wheels 102 and to be deactivated to disconnect the electric motor 104 from the rear wheels 102.
  • the drive system 100 further comprises an electrical source 108.
  • the electrical source 108 is a direct voltage source comprising, for example, a battery.
  • the drive system 100 further includes an inverter 110 designed to provide alternating voltages to the electric motor 104 from the electrical source 108.
  • the drive system 100 further comprises a control device 112 for the clutch 106.
  • the control device 112 firstly comprises a first electrical supply terminal 114 connected to a negative terminal of the electrical source 108 (this negative terminal forming an electrical ground) and a second electrical supply terminal 116 connected to a terminal positive of the electrical source 108.
  • the control device 112 further comprises a functional member 118 intended to be powered by the electrical source 108.
  • the functional member is an electromechanical actuator 118 designed to selectively take an activation state of the clutch 106 and a deactivation state of the clutch 106.
  • the electromechanical actuator 118 comprises a solenoid and a movable rod extending into the solenoid. The solenoid is configured to move the rod selectively between an activation position of the clutch 106 (corresponding to the activation state of the electromagnetic actuator 118) and a deactivation position of the clutch 106 (corresponding to the deactivation state of the electromagnetic actuator 118).
  • the electromechanical actuator 118 is designed to be alternately connected and disconnected from the electrical source 108 according to a certain cyclical ratio, equal to the time when it is disconnected relative to the time of a period.
  • the duty cycle is less than a threshold S RC
  • the electromechanical actuator 118 is in the deactivation state of the clutch 106.
  • the duty cycle is greater than the threshold S RC
  • the electromechanical actuator 118 is in the state of activation state and therefore activates the clutch 106.
  • the control device 112 further comprises a first controllable switch 120 placed between the electromechanical actuator 118 and one of the electrical power supply terminals, in the example described the first electrical supply terminal 114.
  • the first controllable switch 120 is a normally closed controllable switch, that is to say that in the absence of control it behaves like a closed switch.
  • it includes an N-channel MOSFET.
  • the control device 112 further comprises a second controllable switch 122 placed between the electromechanical actuator 118 and one of the electrical supply terminals, in the example described the second electrical supply terminal 116.
  • the second controllable switch 122 is a normally open controllable switch, that is to say that in the absence of control it behaves like an open switch.
  • it includes a P-channel MOSFET.
  • the control device 112 further comprises a resistor 124 placed between the first controllable switch 120 and the first electrical supply terminal 114.
  • the control device 112 further comprises a measuring device 126 designed to measure a current 1 passing through the resistor 124 and a voltage U across the resistor 124.
  • the drive system 100 further comprises a control device 128 for the controllable switches 120, 122 and the inverter 110.
  • the control device 128 comprises a first integrated circuit 130 and a second integrated circuit 132.
  • the first integrated circuit 130 is a microcontroller and the second integrated circuit 132 is an FPGA.
  • the microcontroller 130 is designed to control the first controllable switch 120 according to a desired duty cycle in order to control the electromechanical actuator 118.
  • the microcontroller controls the first controllable switch 120 by providing it with a zero gate-source voltage for open the first controllable switch 120 and non-zero to close it.
  • the microcontroller 130 is further designed to control the inverter 110.
  • the microcontroller is designed to change the duty cycle from 0 to 1, or vice versa, in a switching time of for example between 1 and 3 seconds, preferably in 2 seconds.
  • the microcontroller 130 is first designed to be in an operational state.
  • the microcontroller 130 In this operational state, when it receives a command C to activate the clutch 106, the microcontroller 130 is designed to control the first switch 120 so as to increase the duty cycle above the threshold S RC (to 1 in the example described) to move the electromechanical actuator 118 to the activation state of the clutch 106. In addition, the microcontroller 130 controls the inverter 110 so that the electric motor 104 provides a non-zero torque .
  • the microcontroller 130 when it receives a command C to deactivate the clutch 106, the microcontroller 130 is designed to control the first switch 120 so as to pass the lower duty cycle below the threshold S RC ( to 0 in the example described) to move the electromechanical actuator 118 to the deactivation state of the clutch 106. In addition, the microcontroller 130 controls the inverter 110 so that the electric motor 104 provides zero torque .
  • microcontroller 130 is designed to receive a speed V of the vehicle and to compare it to a predefined threshold, for example 130 km/h.
  • the microcontroller 130 is designed to control the first switch 120 so as to pass the duty cycle below the threshold S RC (to 0 in the example described) to pass the electromechanical actuator 118 in the deactivated state of the clutch 106. Furthermore, the microcontroller 130 is designed to control the inverter 110 so that the electric motor 104 provides zero torque. In addition, the microcontroller 130 is designed to ignore the commands C for activating the clutch 106. In fact, driving the rear wheels 102 is dangerous at high speed.
  • the microcontroller 130 is designed to switch to the operational state.
  • the microcontroller 130 is further designed to receive the voltage U and the current I while the first controllable switch 120 is closed and to compare them respectively to a threshold S U and to a threshold Si.
  • the microcontroller 130 is designed to detect a failure of the control device 112 and to control the first switch 120 so as to switch the gear cyclic below the threshold S RC (at 0 in the example described) to move the electromechanical actuator 118 to the deactivation state of the clutch 106.
  • the microcontroller 130 is designed to send the FPGA 132 a request for opening of the second controllable switch 122 and to control the inverter 110 so that the electric machine 106 provides zero torque.
  • the microcontroller 130 is designed to ignore the commands C for activating the clutch 106, as well as the speed V of the vehicle. Thus, the clutch 106 cannot be reactivated.
  • the microcontroller 130 is further designed to monitor the FPGA 132 to detect a failure of the latter. For example, the microcontroller 130 sends requests to the FPGA 132 at different times in order to obtain a response. In the absence of a response or if the response is not compliant, the microcontroller 130 deduces a failure of the FPGA 132.
  • the microcontroller 130 detects a failure of the FPGA 132, the microcontroller 130 is designed to control the first controllable switch 120 so as to pass the duty cycle below the threshold S RC (to 0 in the example described) to pass the electromechanical actuator 118 in the deactivation state of the clutch 106.
  • the microcontroller 130 controls the inverter 110 so that the electric machine 104 provides zero torque.
  • the microcontroller 130 ignores the commands for activation of the clutch 106 and the speed V of the vehicle. Thus, the clutch 106 cannot be reactivated.
  • the FPGA 132 is designed to control the second controllable switch 122 by supplying it, in the example described, with a gate-source voltage, zero to open the second controllable switch 122 and non-zero to close it.
  • the FPGA 132 is further designed to receive the current I and the voltage U while the first controllable switch 120 is closed and to compare them respectively to the threshold S U and to the threshold S I.
  • the FPGA 132 is designed to detect a failure of the control device 112 and to control the second controllable switch 122 when opening to make switch the electromechanical actuator 118 to the state of deactivation of the clutch 106.
  • the FPGA 132 is further designed to monitor the microcontroller 130 to detect a failure of the latter. For example, the FPGA 132 sends requests to the microcontroller 130 at different times in order to obtain a response. In the absence of a response or if the response is not compliant, the FPGA 132 deduces a failure of the microcontroller 130.
  • the FPGA 132 If the FPGA 132 detects a failure of the microcontroller 130, the FPGA 132 controls the second switch 122 to open to move the actuator 118 to the deactivation state of the clutch 106. In addition, the FPGA 132 controls the inverter 110 so that the electric machine 104 provides zero torque.
  • the FPGA 132 receives a request to open the second controllable switch 122 from the microcontroller 130, the FPGA 132 is designed to control the second switch 122 to open to cause the actuator 118 to switch to the clutch deactivation state 106.
  • the wheels could be front wheels of the motor vehicle.
  • the functional member 118 could be another functional member than an electromechanical actuator designed to control a clutch.

Description

DOMAINE TECHNIQUETECHNICAL AREA

La présente invention concerne le domaine du pilotage d'un organe fonctionnel de manière sécurisé.The present invention relates to the field of controlling a functional organ in a secure manner.

ARRIÈRE-PLAN TECHNOLOGIQUETECHNOLOGY BACKGROUND

Il est connu d'utiliser un système électrique de pilotage d'un organe fonctionnel comportant :

  • un dispositif électrique comportant :
    • deux bornes d'alimentation électrique destinées à être connectées respectivement à une borne positive et une borne négative d'une source électrique,
    • un organe fonctionnel destiné à être alimenté par la source électrique,
    • un premier interrupteur commandable placé entre l'organe fonctionnel et l'une des bornes d'alimentation électrique,
  • un dispositif de commande conçu pour commander le premier interrupteur commandable afin de piloter l'organe fonctionnel.
It is known to use an electrical system for controlling a functional organ comprising:
  • an electrical device comprising:
    • two electrical supply terminals intended to be connected respectively to a positive terminal and a negative terminal of an electrical source,
    • a functional organ intended to be powered by the electrical source,
    • a first controllable switch placed between the functional member and one of the electrical supply terminals,
  • a control device designed to control the first controllable switch in order to control the functional member.

Généralement, le dispositif de commande est en outre conçu pour détecter une défaillance du dispositif électrique et, en cas de détection d'une défaillance, pour commander le premier interrupteur à l'ouverture avec pour effet de déconnecter l'organe fonctionnel de la source électrique.Generally, the control device is further designed to detect a failure of the electrical device and, in the event of detection of a failure, to control the first switch to open with the effect of disconnecting the functional member from the electrical source .

Le document US2011/0285202 A1 divulgue un Système électrique de pilotage d'un organe fonctionnel avec les caractéristiques techniques du préambule de la revendication 1.The document US2011/0285202 A1 discloses an electrical system for controlling a functional organ with the technical characteristics of the preamble of claim 1.

L'invention a pour but de proposer un système électrique de pilotage d'un organe fonctionnel plus sécurisé que ceux présentés ci-dessus.The aim of the invention is to propose an electrical system for controlling a functional organ that is more secure than those presented above.

RÉSUMÉ DE L'INVENTIONSUMMARY OF THE INVENTION

À cet effet, il est proposé un système électrique de pilotage d'un organe fonctionnel comportant :

  • un dispositif électrique comportant :
    • deux bornes d'alimentation électrique destinées à être connectées respectivement à une borne positive et une borne négative d'une source électrique,
    • un organe fonctionnel destiné à être alimenté par la source électrique,
    • un premier interrupteur commandable placé entre l'organe fonctionnel et l'une des bornes d'alimentation électrique,
  • un dispositif de commande conçu pour commander le premier interrupteur commandable afin de piloter l'organe fonctionnel,
  • le système électrique étant caractérisé en ce qu'il comporte en outre :
    • un deuxième interrupteur commandable placé entre l'organe fonctionnel et l'autre des bornes d'alimentation électrique,
  • et en ce que le dispositif de commande est en outre conçu pour détecter une défaillance du dispositif électrique et, en cas de détection d'une défaillance, ouvrir le deuxième interrupteur commandable pour désactiver l'organe fonctionnel.
For this purpose, an electrical system is proposed for controlling a functional organ comprising:
  • an electrical device comprising:
    • two electrical supply terminals intended to be connected respectively to a positive terminal and a negative terminal of an electrical source,
    • a functional organ intended to be powered by the electrical source,
    • a first controllable switch placed between the functional member and one of the electrical supply terminals,
  • a control device designed to control the first controllable switch in order to control the functional member,
  • the electrical system being characterized in that it further comprises:
    • a second controllable switch placed between the functional member and the other of the electrical power supply terminals,
  • and in that the control device is further designed to detect a failure of the electrical device and, in the event of detection of a failure, open the second controllable switch to deactivate the functional member.

Grâce à l'invention, l'organe fonctionnel peut être déconnecté de la source électrique même en cas de défaillance du premier interrupteur commandable.Thanks to the invention, the functional member can be disconnected from the electrical source even in the event of failure of the first controllable switch.

Dans un mode de réalisation particulier, l'organe fonctionnel est placé entre le premier interrupteur commandable et le deuxième interrupteur commandable.In a particular embodiment, the functional member is placed between the first controllable switch and the second controllable switch.

Dans un mode de réalisation particulier, le premier interrupteur commandable est placé entre l'organe fonctionnel et la bornes d'alimentation électrique destinées à être connectées à la borne négative de la source électrique.In a particular embodiment, the first controllable switch is placed between the functional member and the electrical supply terminals intended to be connected to the negative terminal of the electrical source.

Dans un mode de réalisation particulier, le deuxième interrupteur commandable est placé entre l'organe fonctionnel et la bornes d'alimentation électrique destinées à être connectées à la borne positive de la source électrique.De façon optionnelle, le premier interrupteur commandable est un interrupteur normalement fermé.In a particular embodiment, the second controllable switch is placed between the functional member and the electrical supply terminals intended to be connected to the positive terminal of the electrical source. Optionally, the first controllable switch is a switch normally farm.

De façon optionnelle également, le deuxième interrupteur commandable est un interrupteur normalement ouvert.Also optionally, the second controllable switch is a normally open switch.

De façon optionnelle également, l'organe fonctionnel est conçu pour être alternativement connecté et déconnecté de la source électrique selon un certain rapport cyclique, égal au temps de déconnexion par rapport au temps d'une période, et l'organe fonctionnel est conçu pour sélectivement prendre un premier état lorsque le rapport cyclique est inférieur à un seuil prédéfini et un deuxième état lorsque le rapport cyclique est supérieur au seuil prédéfini.Also optionally, the functional member is designed to be alternately connected and disconnected from the electrical source according to a certain cyclical ratio, equal to the disconnection time relative to the time of a period, and the functional member is designed to selectively take a first state when the duty cycle is less than a predefined threshold and a second state when the duty cycle is greater than the predefined threshold.

De façon optionnelle également, le dispositif électrique comporte en outre une résistance placée entre le premier interrupteur commandable et une des bornes d'alimentation électrique, et le dispositif de commande est conçu pour détecter une défaillance du dispositif électrique à partir d'un courant parcourant la résistance et/ou d'une tension aux bornes de la résistance.Also optionally, the electrical device further comprises a resistance placed between the first controllable switch and one of the electrical power supply terminals, and the control device is designed to detect a failure of the electrical device from a current flowing through the resistance and/or a voltage across the resistance.

De façon optionnelle également, le dispositif de commande comporte un premier circuit intégré conçu pour commander le premier interrupteur commandable et un deuxième circuit intégré conçu pour commander le deuxième interrupteur commandable.Also optionally, the control device comprises a first integrated circuit designed to control the first controllable switch and a second integrated circuit designed to control the second controllable switch.

De façon optionnelle également, le premier circuit intégré est conçu pour surveiller le deuxième circuit intégré afin de détecter une défaillance du deuxième circuit intégré, et le deuxième circuit intégré est conçu pour surveiller le premier circuit intégré afin de détecter une défaillance du premier circuit intégré.Also optionally, the first integrated circuit is configured to monitor the second integrated circuit to detect a failure of the second integrated circuit, and the second integrated circuit is configured to monitor the first integrated circuit to detect a failure of the first integrated circuit.

De façon optionnelle également, l'organe fonctionnel est un actuateur électromécanique conçu pour piloter un embrayage.Also optionally, the functional member is an electromechanical actuator designed to control a clutch.

Il est également proposé un système d'entraînement de roues d'un véhicule automobile, comportant :

  • un moteur électrique conçu pour entraîner les roues,
  • un embrayage conçu pour être activé pour connecter le moteur électrique aux roues et pour être désactivé pour déconnecter le moteur électrique des roues,
  • un système électrique de pilotage d'un organe fonctionnel selon l'invention, l'organe fonctionnel étant un actuateur électromécanique conçu pour piloter l'embrayage.
A wheel drive system for a motor vehicle is also proposed, comprising:
  • an electric motor designed to drive the wheels,
  • a clutch designed to be activated to connect the electric motor to the wheels and to be deactivated to disconnect the electric motor from the wheels,
  • an electrical system for controlling a functional member according to the invention, the functional member being an electromechanical actuator designed to control the clutch.

DESCRIPTION DES FIGURESDESCRIPTION OF FIGURES

La figure unique représente schématiquement un système d'entraînement de roues arrière d'un véhicule automobile mettant en oeuvre l'invention.The single figure schematically represents a rear wheel drive system of a motor vehicle implementing the invention.

DESCRIPTION DÉTAILLÉEDETAILED DESCRIPTION

En référence à la figure unique, un système d'entraînement 100 de roues arrière 102 d'un véhicule automobile mettant en oeuvre l'invention va à présent être décrit.With reference to the single figure, a drive system 100 for rear wheels 102 of a motor vehicle implementing the invention will now be described.

Le système d'entraînement 100 comporte tout d'abord les roues arrière 102 du véhicule automobile.The drive system 100 firstly comprises the rear wheels 102 of the motor vehicle.

Le système d'entraînement 100 comporte en outre un moteur électrique 104 conçu pour entraîner les roues arrière 102.The drive system 100 further includes an electric motor 104 designed to drive the rear wheels 102.

Le système d'entraînement 100 comporte en outre un embrayage 106 conçu pour être activé pour connecter le moteur électrique 104 aux roues arrière 102 et pour être désactivé pour déconnecter le moteur électrique 104 des roues arrières 102.The drive system 100 further includes a clutch 106 configured to be activated to connect the electric motor 104 to the rear wheels 102 and to be deactivated to disconnect the electric motor 104 from the rear wheels 102.

Le système d'entraînement 100 comporte en outre une source électrique 108. Dans l'exemple décrit, la source électrique 108 est une source de tension continue comportant par exemple une batterie.The drive system 100 further comprises an electrical source 108. In the example described, the electrical source 108 is a direct voltage source comprising, for example, a battery.

Le système d'entraînement 100 comporte en outre un onduleur 110 conçu pour fournir des tensions alternatives au moteur électrique 104 à partir de la source électrique 108.The drive system 100 further includes an inverter 110 designed to provide alternating voltages to the electric motor 104 from the electrical source 108.

Le système d'entraînement 100 comporte en outre un dispositif de commande 112 de l'embrayage 106.The drive system 100 further comprises a control device 112 for the clutch 106.

Le dispositif de commande 112 comporte tout d'abord une première borne d'alimentation électrique 114 connectée à une borne négative de la source électrique 108 (cette borne négative formant une masse électrique) et une deuxième borne d'alimentation électrique 116 connectée à une borne positive de la source électrique 108.The control device 112 firstly comprises a first electrical supply terminal 114 connected to a negative terminal of the electrical source 108 (this negative terminal forming an electrical ground) and a second electrical supply terminal 116 connected to a terminal positive of the electrical source 108.

Le dispositif de commande 112 comporte en outre un organe fonctionnel 118 destiné à être alimenté par la source électrique 108. Dans l'exemple décrit, l'organe fonctionnel est un actuateur électromécanique 118 conçu pour sélectivement prendre un état d'activation de l'embrayage 106 et un état de désactivation de l'embrayage 106. Dans l'exemple décrit, l'actuateur électromécanique 118 comporte un solénoïde et une tige mobile s'étendant dans le solénoïde. Le solénoïde est conçu pour déplacer la tige sélectivement entre une position d'activation de l'embrayage 106 (correspondant à l'état d'activation de l'actuateur électromagnétique 118) et une position de désactivation de l'embrayage 106 (correspondant à l'état de désactivation de l'actuateur électromagnétique 118). En outre, dans l'exemple décrit, l'actuateur électromécanique 118 est conçu pour être alternativement connecté et déconnecté de la source électrique 108 selon un certain rapport cyclique, égal au temps où il est déconnecté par rapport au temps d'une période. Lorsque le rapport cyclique est inférieur à un seuil SRC, l'actuateur électromécanique 118 est à l'état de désactivation de l'embrayage 106. Lorsque le rapport cyclique est supérieur au seuil SRC, l'actuateur électromécanique 118 est à l'état d'activation et active donc l'embrayage 106.The control device 112 further comprises a functional member 118 intended to be powered by the electrical source 108. In the example described, the functional member is an electromechanical actuator 118 designed to selectively take an activation state of the clutch 106 and a deactivation state of the clutch 106. In the example described, the electromechanical actuator 118 comprises a solenoid and a movable rod extending into the solenoid. The solenoid is configured to move the rod selectively between an activation position of the clutch 106 (corresponding to the activation state of the electromagnetic actuator 118) and a deactivation position of the clutch 106 (corresponding to the deactivation state of the electromagnetic actuator 118). Furthermore, in the example described, the electromechanical actuator 118 is designed to be alternately connected and disconnected from the electrical source 108 according to a certain cyclical ratio, equal to the time when it is disconnected relative to the time of a period. When the duty cycle is less than a threshold S RC , the electromechanical actuator 118 is in the deactivation state of the clutch 106. When the duty cycle is greater than the threshold S RC , the electromechanical actuator 118 is in the state of activation state and therefore activates the clutch 106.

Le dispositif de commande 112 comporte en outre un premier interrupteur commandable 120 placé entre l'actuateur électromécanique 118 et l'une des bornes d'alimentation électrique, dans l'exemple décrit la première borne d'alimentation électrique 114. Dans l'exemple décrit, le premier interrupteur commandable 120 est un interrupteur commandable normalement fermé, c'est-à-dire qu'en l'absence de commande il se comporte comme un interrupteur fermé. Il comporte par exemple un MOSFET canal N.The control device 112 further comprises a first controllable switch 120 placed between the electromechanical actuator 118 and one of the electrical power supply terminals, in the example described the first electrical supply terminal 114. In the example described, the first controllable switch 120 is a normally closed controllable switch, that is to say that in the absence of control it behaves like a closed switch. For example, it includes an N-channel MOSFET.

Le dispositif de commande 112 comporte en outre un deuxième interrupteur commandable 122 placé entre l'actuateur électromécanique 118 et l'une des bornes d'alimentation électrique, dans l'exemple décrit la deuxième borne d'alimentation électrique 116. Dans l'exemple décrit, le deuxième interrupteur commandable 122 est un interrupteur commandable normalement ouvert, c'est-à-dire qu'en l'absence de commande il se comporte comme un interrupteur ouvert. Il comporte par exemple un MOSFET canal P.The control device 112 further comprises a second controllable switch 122 placed between the electromechanical actuator 118 and one of the electrical supply terminals, in the example described the second electrical supply terminal 116. In the example described , the second controllable switch 122 is a normally open controllable switch, that is to say that in the absence of control it behaves like an open switch. For example, it includes a P-channel MOSFET.

Le dispositif de commande 112 comporte en outre une résistance 124 placée entre le premier interrupteur commandable 120 et la première borne d'alimentation électrique 114.The control device 112 further comprises a resistor 124 placed between the first controllable switch 120 and the first electrical supply terminal 114.

Le dispositif de commande 112 comporte en outre un dispositif de mesure 126 conçu pour mesurer un courant 1 traversant la résistance 124 et une tension U aux bornes de la résistance 124.The control device 112 further comprises a measuring device 126 designed to measure a current 1 passing through the resistor 124 and a voltage U across the resistor 124.

Le système d'entraînement 100 comporte en outre un dispositif de commande 128 des interrupteurs commandables 120, 122 et de l'onduleur 110.The drive system 100 further comprises a control device 128 for the controllable switches 120, 122 and the inverter 110.

Le dispositif de commande 128 comporte un premier circuit intégré 130 et un deuxième circuit intégré 132. Dans l'exemple décrit, le premier circuit intégré 130 est un microcontrôleur et le deuxième circuit intégré 132 est un FPGA.The control device 128 comprises a first integrated circuit 130 and a second integrated circuit 132. In the example described, the first integrated circuit 130 is a microcontroller and the second integrated circuit 132 is an FPGA.

Le microcontrôleur 130 est conçu pour commander le premier interrupteur commandable 120 selon un rapport cyclique souhaité afin de piloter l'actuateur électromécanique 118. Dans l'exemple décrit, le microcontrôleur commande le premier interrupteur commandable 120 en lui fournissant une tension grille-source nulle pour ouvrir le premier interrupteur commandable 120 et non nulle pour le fermer. Le microcontrôleur 130 est en outre conçu pour commander l'onduleur 110. Afin de déplacer dans l'exemple décrit à la bonne vitesse l'actuateur électronique 118, le microcontrôleur est conçu pour faire passer le rapport cyclique de 0 à 1, ou inversement, en un temps de commutation compris par exemple entre 1 et 3 secondes, de préférence en 2 secondes.The microcontroller 130 is designed to control the first controllable switch 120 according to a desired duty cycle in order to control the electromechanical actuator 118. In the example described, the microcontroller controls the first controllable switch 120 by providing it with a zero gate-source voltage for open the first controllable switch 120 and non-zero to close it. The microcontroller 130 is further designed to control the inverter 110. In order to move the electronic actuator 118 at the right speed in the example described, the microcontroller is designed to change the duty cycle from 0 to 1, or vice versa, in a switching time of for example between 1 and 3 seconds, preferably in 2 seconds.

Le microcontrôleur 130 est tout d'abord conçu pour être dans un état opérationnel.The microcontroller 130 is first designed to be in an operational state.

Dans cet état opérationnel, lorsqu'il reçoit une commande C d'activation de l'embrayage 106, le microcontrôleur 130 est conçu pour commander le premier interrupteur 120 de manière à faire passer le rapport cyclique au-dessus du seuil SRC (à 1 dans l'exemple décrit) pour faire passer l'actuateur électromécanique 118 à l'état d'activation de l'embrayage 106. En outre, le microcontrôleur 130 commande l'onduleur 110 de sorte que le moteur électrique 104 fournisse un couple non nul.In this operational state, when it receives a command C to activate the clutch 106, the microcontroller 130 is designed to control the first switch 120 so as to increase the duty cycle above the threshold S RC (to 1 in the example described) to move the electromechanical actuator 118 to the activation state of the clutch 106. In addition, the microcontroller 130 controls the inverter 110 so that the electric motor 104 provides a non-zero torque .

En outre, dans cet état opérationnel, lorsqu'il reçoit une commande C de désactivation de l'embrayage 106, le microcontrôleur 130 est conçu pour commander le premier interrupteur 120 de manière à faire passer le rapport cyclique inférieur en dessous du seuil SRC (à 0 dans l'exemple décrit) pour faire passer l'actuateur électromécanique 118 à l'état de désactivation de l'embrayage 106. En outre, le microcontrôleur 130 commande l'onduleur 110 de sorte que le moteur électrique 104 fournisse un couple nul.Furthermore, in this operational state, when it receives a command C to deactivate the clutch 106, the microcontroller 130 is designed to control the first switch 120 so as to pass the lower duty cycle below the threshold S RC ( to 0 in the example described) to move the electromechanical actuator 118 to the deactivation state of the clutch 106. In addition, the microcontroller 130 controls the inverter 110 so that the electric motor 104 provides zero torque .

Par ailleurs, le microcontrôleur 130 est conçu pour recevoir une vitesse V du véhicule et pour la comparer à un seuil prédéfini, par exemple 130 km/h.Furthermore, the microcontroller 130 is designed to receive a speed V of the vehicle and to compare it to a predefined threshold, for example 130 km/h.

Si la vitesse V du véhicule est supérieure au seuil prédéfini, le microcontrôleur 130 est conçu pour commander le premier interrupteur 120 de manière à faire passer le rapport cyclique en dessous du seuil SRC (à 0 dans l'exemple décrit) pour faire passer l'actuateur électromécanique 118 à l'état de désactivation de l'embrayage 106. En outre, le microcontrôleur 130 est conçu pour commander l'onduleur 110 de sorte que le moteur électrique 104 fournisse un couple nul. En outre, le microcontrôleur 130 est conçu pour ignorer les commandes C d'activation de l'embrayage 106. En effet, l'entraînement des roues arrière 102 est dangereux à haute vitesse.If the speed V of the vehicle is greater than the predefined threshold, the microcontroller 130 is designed to control the first switch 120 so as to pass the duty cycle below the threshold S RC (to 0 in the example described) to pass the electromechanical actuator 118 in the deactivated state of the clutch 106. Furthermore, the microcontroller 130 is designed to control the inverter 110 so that the electric motor 104 provides zero torque. In addition, the microcontroller 130 is designed to ignore the commands C for activating the clutch 106. In fact, driving the rear wheels 102 is dangerous at high speed.

Si la vitesse V du véhicule est inférieure au seuil prédéfini, le microcontrôleur 130 est conçu pour passer à l'état opérationnel.If the speed V of the vehicle is lower than the predefined threshold, the microcontroller 130 is designed to switch to the operational state.

Le microcontrôleur 130 est en outre conçu pour recevoir la tension U et le courant I pendant que le premier interrupteur commandable 120 est fermé et pour les comparer respectivement à un seuil SU et à un seuil Si.The microcontroller 130 is further designed to receive the voltage U and the current I while the first controllable switch 120 is closed and to compare them respectively to a threshold S U and to a threshold Si.

Si la tension U est inférieure à un seuil SU ou bien le courant I est inférieur au seuil Si, le microcontrôleur 130 est conçu pour détecter une défaillance du dispositif de commande 112 et pour commander le premier interrupteur 120 de manière à faire passer le rapport cyclique en dessous du seuil SRC (à 0 dans l'exemple décrit) pour faire passer l'actuateur électromécanique 118 à l'état de désactivation de l'embrayage 106. En outre, le microcontrôleur 130 est conçu pour envoyer au FPGA 132 une demande d'ouverture du deuxième interrupteur commandable 122 et pour commander l'onduleur 110 de sorte que la machine électrique 106 fournisse un couple nul. En outre, le microcontrôleur 130 est conçu pour ignorer les commandes C d'activation de l'embrayage 106, ainsi que la vitesse V du véhicule. Ainsi, l'embrayage 106 ne peut pas être réactivé.If the voltage U is less than a threshold S U or the current I is less than the threshold Si, the microcontroller 130 is designed to detect a failure of the control device 112 and to control the first switch 120 so as to switch the gear cyclic below the threshold S RC (at 0 in the example described) to move the electromechanical actuator 118 to the deactivation state of the clutch 106. In addition, the microcontroller 130 is designed to send the FPGA 132 a request for opening of the second controllable switch 122 and to control the inverter 110 so that the electric machine 106 provides zero torque. In addition, the microcontroller 130 is designed to ignore the commands C for activating the clutch 106, as well as the speed V of the vehicle. Thus, the clutch 106 cannot be reactivated.

Le microcontrôleur 130 est en outre conçu pour surveiller le FPGA 132 afin de détecter une défaillance de ce dernier. Par exemple, le microcontrôleur 130 envoie à différents moments des requêtes au FPGA 132 afin d'obtenir une réponse. En l'absence de réponse ou bien si la réponse n'est pas conforme, le microcontrôleur 130 en déduit une défaillance du FPGA 132.The microcontroller 130 is further designed to monitor the FPGA 132 to detect a failure of the latter. For example, the microcontroller 130 sends requests to the FPGA 132 at different times in order to obtain a response. In the absence of a response or if the response is not compliant, the microcontroller 130 deduces a failure of the FPGA 132.

Si le microcontrôleur 130 détecte une défaillance du FPGA 132, le microcontrôleur 130 est conçu pour commander le premier interrupteur commandable 120 de manière à faire passer le rapport cyclique en dessous du seuil SRC (à 0 dans l'exemple décrit) pour faire passer l'actuateur électromécanique 118 à l'état de désactivation de l'embrayage 106. En outre, le microcontrôleur 130 commande l'onduleur 110 de sorte que la machine électrique 104 fournisse un couple nul. En outre, le microcontrôleur 130 ignore les commandes d'activation de l'embrayage 106 et la vitesse V du véhicule. Ainsi, l'embrayage 106 ne peut pas être réactivé.If the microcontroller 130 detects a failure of the FPGA 132, the microcontroller 130 is designed to control the first controllable switch 120 so as to pass the duty cycle below the threshold S RC (to 0 in the example described) to pass the electromechanical actuator 118 in the deactivation state of the clutch 106. In addition, the microcontroller 130 controls the inverter 110 so that the electric machine 104 provides zero torque. In addition, the microcontroller 130 ignores the commands for activation of the clutch 106 and the speed V of the vehicle. Thus, the clutch 106 cannot be reactivated.

Le FPGA 132 est conçu pour commander le deuxième interrupteur commandable 122 en lui fournissant, dans l'exemple décrit, une tension grille-source, nulle pour ouvrir le deuxième interrupteur commandable 122 et non nulle pour le fermer.The FPGA 132 is designed to control the second controllable switch 122 by supplying it, in the example described, with a gate-source voltage, zero to open the second controllable switch 122 and non-zero to close it.

Le FPGA 132 est en outre conçu pour recevoir le courant I et la tension U pendant que le premier interrupteur commandable 120 est fermé et pour les comparer respectivement au seuil SU et au seuil SI.The FPGA 132 is further designed to receive the current I and the voltage U while the first controllable switch 120 is closed and to compare them respectively to the threshold S U and to the threshold S I.

Si la tension U est inférieure à un seuil SU ou bien le courant I est inférieur au seuil Si, le FPGA 132 est conçu pour détecter une défaillance du dispositif de commande 112 et pour commander le deuxième interrupteur commandable 122 à l'ouverture pour faire passer l'actuateur électromécanique 118 à l'état de désactivation de l'embrayage 106.If the voltage U is less than a threshold S U or the current I is less than the threshold Si, the FPGA 132 is designed to detect a failure of the control device 112 and to control the second controllable switch 122 when opening to make switch the electromechanical actuator 118 to the state of deactivation of the clutch 106.

Le FPGA 132 est en outre conçu pour surveiller le microcontrôleur 130 afin de détecter une défaillance de ce dernier. Par exemple, le FPGA 132 envoie à différents moments des requêtes au microcontrôleur 130 afin d'obtenir une réponse. En l'absence de réponse ou bien si la réponse n'est pas conforme, le FPGA 132 en déduit une défaillance du microcontrôleur 130.The FPGA 132 is further designed to monitor the microcontroller 130 to detect a failure of the latter. For example, the FPGA 132 sends requests to the microcontroller 130 at different times in order to obtain a response. In the absence of a response or if the response is not compliant, the FPGA 132 deduces a failure of the microcontroller 130.

Si le FPGA 132 détecte une défaillance du microcontrôleur 130, le FPGA 132 commande le deuxième interrupteur 122 à l'ouverture pour faire passer l'actuateur 118 à l'état de désactivation de l'embrayage 106. En outre, le FPGA 132 commande l'onduleur 110 de sorte que la machine électrique 104 fournisse un couple nul.If the FPGA 132 detects a failure of the microcontroller 130, the FPGA 132 controls the second switch 122 to open to move the actuator 118 to the deactivation state of the clutch 106. In addition, the FPGA 132 controls the inverter 110 so that the electric machine 104 provides zero torque.

Par ailleurs, si le FPGA 132 reçoit une demande d'ouverture du deuxième interrupteur commandable 122 de la part du microcontrôleur 130, le FPGA 132 est conçu pour commander le deuxième interrupteur 122 à l'ouverture pour faire passer l'actuateur 118 à l'état de désactivation de l'embrayage 106.Furthermore, if the FPGA 132 receives a request to open the second controllable switch 122 from the microcontroller 130, the FPGA 132 is designed to control the second switch 122 to open to cause the actuator 118 to switch to the clutch deactivation state 106.

La présente invention n'est pas limitée au mode de réalisation décrit précédemment, mais est au contraire définie par les revendications qui suivent. Il sera en effet apparent à l'homme du métier que des modifications peuvent y être apportées.The present invention is not limited to the embodiment described above, but is on the contrary defined by the claims which follow. It will in fact be apparent to those skilled in the art that modifications can be made thereto.

Par exemple, les roues pourraient être des roues avant du véhicule automobile.For example, the wheels could be front wheels of the motor vehicle.

En outre, l'organe fonctionnel 118 pourrait être un autre organe fonctionnel qu'un actuateur électromécanique conçu pour piloter un embrayage.In addition, the functional member 118 could be another functional member than an electromechanical actuator designed to control a clutch.

Par ailleurs, les termes utilisés dans les revendications ne doivent pas être compris comme limités aux éléments du mode de réalisation décrit précédemment. La portée de l'invention est définie uniquement par les revendications annexées.Furthermore, the terms used in the claims should not be understood as limited to the elements of the embodiment described above. The scope of the invention is defined solely by the appended claims.

Claims (11)

  1. Electrical system (112, 128) for controlling a functional component (118) comprising:
    - an electrical device (112) comprising:
    - two electrical power supply terminals (114, 116) intended to be respectively connected to a positive terminal and to a negative terminal of an electrical source (108),
    - a functional component (118) intended to be powered by the electrical source (108),
    - a first controllable switch (120) placed between the functional component (118) and one of the electrical power supply terminals (114),
    - a control device (128) designed to control the first controllable switch (120) in order to control the functional component (118),
    the electrical system (112, 128) being characterized in that it further comprises:
    - a second controllable switch (122) placed between the functional component (118) and the other one of the electrical power supply terminals (114, 116),
    and in that the control device (128) is also designed to detect a fault in the electrical device (112) and, in the event of the detection of a fault, to open the second controllable switch (122) in order to deactivate the functional component (118).
  2. Electrical system (112, 128) according to Claim 1, wherein the functional component (118) is placed between the first controllable switch (120) and the second controllable switch (122).
  3. Electrical system (112, 128) according to Claim 1 or 2, wherein the first controllable switch (120) is a normally closed switch.
  4. Electrical system (112, 128) according to any one of Claims 1 to 3, wherein the second controllable switch (122) is a normally open switch.
  5. Electrical system (112, 128) according to any one of Claims 1 to 4, wherein the functional component (118) is designed in order to be alternately connected to and disconnected from the electrical source (108) according to a certain duty cycle, equal to the disconnection time compared to the time of a period, and wherein the functional component (118) is designed to selectively assume a first state when the duty cycle is less than a predefined threshold and a second state when the duty cycle is greater than the predefined threshold.
  6. Electrical system (112, 128) according to any one of Claims 1 to 5, wherein the electrical device (112) further comprises a resistor (124) placed between the first controllable switch (120) and one of the electrical power supply terminals (114), and wherein the control device (128) is designed to detect a fault in the electrical device (112) from a current (I) passing through the resistor (124) and/or a voltage (U) at the terminals of the resistor (124).
  7. Electrical system (112, 128) according to any one of Claims 1 to 6, wherein the control device (128) comprises a first integrated circuit (130) designed to control the first controllable switch (120) and a second integrated circuit (132) designed to control the second controllable switch (122).
  8. Electrical system (112, 128) according to Claim 7, wherein the first integrated circuit (130) is designed to monitor the second integrated circuit (132) in order to detect a fault in the second integrated circuit (132), and wherein the second integrated circuit (132) is designed to monitor the first integrated circuit (130) in order to detect a fault in the first integrated circuit (130) .
  9. Electrical system (112, 128) according to any one of Claims 1 to 8, wherein the functional component (118) is an electromechanical actuator designed to control a clutch (106).
  10. System (100) for driving the wheels (102) of a motor vehicle, comprising:
    - an electric motor (104) designed to drive the wheels (102),
    - a clutch (106) designed to be activated in order to connect the electric motor (104) to the wheels (102) and to be deactivated in order to disconnect the electric motor (104) from the wheels (102),
    - an electrical system (112, 128) for controlling a functional component (118) according to any one of Claims 1 to 9.
  11. System (100) for driving the wheels (102) of a motor vehicle according to Claim 10, wherein the wheels (102) are the rear wheels of the motor vehicle.
EP18737665.2A 2017-06-27 2018-06-06 Electrical system for controlling a functional member and system for driving the wheels of a motor vehicle Active EP3646364B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1755858A FR3068181B1 (en) 2017-06-27 2017-06-27 ELECTRICAL SYSTEM FOR DRIVING A FUNCTIONAL ORGAN AND A WHEEL DRIVE SYSTEM OF A MOTOR VEHICLE
PCT/FR2018/051308 WO2019002711A1 (en) 2017-06-27 2018-06-06 Electrical system for controlling a functional member and system for driving the wheels of a motor vehicle

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EP3646364A1 EP3646364A1 (en) 2020-05-06
EP3646364B1 true EP3646364B1 (en) 2024-05-01

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EP18737665.2A Active EP3646364B1 (en) 2017-06-27 2018-06-06 Electrical system for controlling a functional member and system for driving the wheels of a motor vehicle

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CN (1) CN110870034B (en)
FR (1) FR3068181B1 (en)
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Publication number Priority date Publication date Assignee Title
JP5481023B2 (en) * 2007-10-25 2014-04-23 株式会社小松製作所 Work vehicle and control method of work vehicle
DE112008003289B4 (en) * 2008-01-02 2020-10-15 Schaeffler Technologies AG & Co. KG Clutch actuator and method for its control
US8148848B2 (en) * 2008-01-24 2012-04-03 Honeywell International, Inc. Solid state power controller (SSPC) used as bus tie breaker in electrical power distribution systems
US8861162B2 (en) * 2010-03-09 2014-10-14 Honeywell International Inc. High power solid state power controller (SSPC) solution for primary power distribution applications
US8344544B2 (en) * 2010-05-19 2013-01-01 Hamilton Sundstrand Corporation Bus-tie SSPCS for DC power distribution system
JP5724928B2 (en) * 2012-03-29 2015-05-27 アイシン・エィ・ダブリュ株式会社 Electromagnetic valve drive circuit control device and abnormality diagnosis method
US9197056B2 (en) * 2012-06-11 2015-11-24 Honeywell International Inc. Solid state power control system for aircraft high voltage DC power distribution
US9660446B2 (en) * 2013-10-04 2017-05-23 Ge Aviation Systems Llc Power distribution system for an aircraft
CN103522995B (en) * 2013-10-30 2015-11-18 江苏理工学院 Roof turns to trailing type air resistance retarding device
US9929685B2 (en) * 2015-06-10 2018-03-27 Infineon Technologies Ag Safety circuit and brush holder for preventing fault conditions in an alternator

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CN110870034A (en) 2020-03-06
WO2019002711A1 (en) 2019-01-03
EP3646364A1 (en) 2020-05-06
FR3068181A1 (en) 2018-12-28
CN110870034B (en) 2022-11-01
FR3068181B1 (en) 2019-11-29

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