EP3041010B1 - Device and method for controlling an electromechanical relay - Google Patents

Device and method for controlling an electromechanical relay Download PDF

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Publication number
EP3041010B1
EP3041010B1 EP15201661.4A EP15201661A EP3041010B1 EP 3041010 B1 EP3041010 B1 EP 3041010B1 EP 15201661 A EP15201661 A EP 15201661A EP 3041010 B1 EP3041010 B1 EP 3041010B1
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EP
European Patent Office
Prior art keywords
electromechanical relay
contact
signal
load
closed position
Prior art date
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Application number
EP15201661.4A
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German (de)
French (fr)
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EP3041010A1 (en
Inventor
Nicolas Genieux
Fabrice Frappereau
Laurent DESSAGNE
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Groupe Brandt SAS
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Groupe Brandt SAS
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Publication of EP3041010A1 publication Critical patent/EP3041010A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
    • H01H9/56—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere for ensuring operation of the switch at a predetermined point in the ac cycle
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/541—Auxiliary contact devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/86—Means for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H7/00—Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts
    • H01H7/16—Devices for ensuring operation of the switch at a predetermined point in the ac cycle
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
    • H01H9/56—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere for ensuring operation of the switch at a predetermined point in the ac cycle
    • H01H2009/566—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere for ensuring operation of the switch at a predetermined point in the ac cycle with self learning, e.g. measured delay is used in later actuations

Definitions

  • the present invention relates to a device and a method for controlling an electromechanical relay.
  • An electromechanical relay is for example used in a supply circuit of a load, for example an inductor or other heating means, in order to cut off the supply of the load when necessary.
  • the electromechanical relay is disposed between the load and an alternating signal, for example an AC supply signal, so as to allow or prevent the application of the AC signal to the load.
  • an alternating signal for example an AC supply signal
  • the electromechanical relay has a contact having two positions, an open position in which the AC signal is not applied to the load and a closed position in which the AC signal is applied to the load.
  • the electromechanical relay changes state, that is to say it opens or closes or the contact moves from the closed position to the open position or vice versa, and an electric current flows through the contact, an electric arc occurs in the electromechanical relay at the contact.
  • the switching time of the electromechanical relay that is to say the time elapsed between the instant at which the electromechanical relay is controlled in opening or closing and the moment at which the contact goes from the closed position in the open position or vice versa, must be known and is taken into account for the control of the electromechanical relay.
  • Control devices are known in which the switching time of the electromechanical relay is known in a predetermined manner and a component such as a triac is arranged in parallel with the electromechanical relay, in order to control the opening or closing of the electromechanical relay.
  • the switching time of an electromechanical relay is measured by means of an optical sensor detecting the presence of an electric arc.
  • the control of the electromechanical relay is implemented in such a way that the opening or closing of the contact of the electromechanical relay is implemented when the supply voltage is zero, c that is, when no current is flowing through the contact.
  • the document WO 90/10942 A1 discloses a device for controlling an electromechanical relay according to the preamble of claim 1.
  • the object of the present invention is to propose a device for controlling an electromechanical relay that makes it possible to limit the wear of the electromechanical relay and thus to lengthen its lifetime while using generic components, thus limiting its cost.
  • the present invention aims, in a first aspect, a control device of an electromechanical relay, the electromechanical relay being disposed between a load and an alternating signal and having a movable contact between an open position in which the alternating signal is not applied to the load or a closed position in which the AC signal is applied to the load, the controller having electromechanical relay control means configured to control the opening or closing of the electromechanical relay has a switching time, so that the contact is placed in the open position or in the closed position when the alternating signal is substantially equal to zero.
  • the switching time of the electromechanical relay is determined in a simplified manner and reliably thanks to the presence of the contact position detection means of the electromechanical relay, this switching time being used to generate the control opening or closing electromechanical relay without any electric arc occurring.
  • the closing or opening of the electromechanical relay is detected according to the detection signal generated on the conductive surface.
  • the detection signal has different parameters depending on the open position or the closed position of the contact.
  • the open or closed position of the contact can thus be known as a function of the parameters of the detection signal generated by the detection means.
  • the detection means are arranged near the electromechanical relay.
  • the conductive surface comprises a surface covered with a metal layer.
  • the detection means are mounted on an electronic card.
  • the electromechanical relay is mounted on the electronic card and the detection means are mounted under the contact of the electromechanical relay.
  • the present invention relates to a method for controlling an electromechanical relay, the electromechanical relay being arranged between a load and an alternating signal and comprising a movable contact between an open position in which the alternating signal is not applied. to the load and a closed position in which the AC signal is applied to the load, the control method comprising a control step in opening or closing of the electromechanical relay taking into account a switching time, so that the contact is placed in open position or in closed position when the AC signal is substantially zero.
  • the detection signal is generated so that parameters of the detection signal are different depending on the open position or the closed position of the contact.
  • the detection step is implemented when said load is disconnected from the AC signal.
  • the present invention relates to a household appliance comprising at least one load and an electromechanical relay disposed between the load and an alternating signal and comprising a movable contact between an open position in which the alternating signal is not applied to the load and a closed position in which the AC signal is applied to the load, the appliance further comprising a control device of an electromechanical relay according to the invention.
  • the method of controlling an electromechanical relay and the appliance has similar features and advantages to those described above in connection with the control device of an electromechanical relay.
  • the present invention finds application in any type of household appliance such as a hob, for example induction, an oven, a stove, a washing machine and / or drying machine or a dishwasher.
  • a hob for example induction, an oven, a stove, a washing machine and / or drying machine or a dishwasher.
  • a household appliance is electrically powered by a power supply of the AC mains or mains supply and typically comprises an electromechanical relay disposed between the power supply and a load to be powered.
  • the figure 1 represents a control device 1 of an electromechanical relay 2 that can be used in a household appliance according to a first embodiment.
  • An electromechanical relay 2 is arranged between a load 3 to be powered and the supply signal V A , the supply signal V A being an alternating signal.
  • the electromechanical relay 2 comprises a movable contact 20 between an open position in which the alternating signal V A is not applied to the load 3 or a closed position in which the alternating signal V A is applied to the load 3.
  • the load 3 is powered or not powered by the supply signal V A.
  • the control device 1 of an electromechanical relay 2 further comprises synchronization means A, configured to generate a logic electrical signal synchronized with the alternating signal V A.
  • the synchronization means A detect the passage by 0 of the alternating signal V A and generate a synchronization signal V B.
  • the synchronization means A generate a synchronization signal V B , which is here a square signal V B ( Figures 5a and 5b ), the square signal alternating between a high level and a low level regularly, indicating the passage by 0 of the AC signal V A , and serving as a time reference of various control signals generated in the control device 1.
  • the control device 1 further comprises control means B of the electromechanical relay 3 configured to control the opening or closing of the electromechanical relay 3.
  • control means B of the relay control the opening or closing of the electromechanical relay 2, that is to say control the switching of the electromechanical relay 2, as a function of a control signal V C .
  • This control signal V C is for example generated by a processing unit 4 configured to control, in particular, the operation of the control device of the electromechanical relay 2.
  • the processing unit 4 is for example a microcontroller, a microprocessor or a programmable logic circuit and includes the programs or algorithms necessary for the operation of the control device 1 of the electromechanical relay 2.
  • control signal V C is a logic signal that can have two levels.
  • control means B control the closing of relays when the control signal V C changes from a low level (for example zero) to a high level (for example 5V), and on the contrary, the means control B control the opening of the electromechanical relay 2 when the control signal V C changes from a high level to a low level.
  • the electromechanical relay 2 is controlled in closing on a rising edge of the logic signal V C and in opening on a falling edge of the logic signal V C.
  • the opening control can be implemented by a rising edge and the command in closing by a front go down. Also other types of control signals can be used.
  • control means B are known to those skilled in the art and do not need to be detailed.
  • the control device 1 of an electromechanical relay 2 further comprises detection means C of the open position or of the closed position of the contact 20.
  • the detection means C are configured to generate a detection signal V D.
  • the detection means C are connected to an end 21 of the electromechanical relay 2.
  • the detection signal V D generated by the detection means C has different parameters depending on the open position or the closed position of the contact 20.
  • the parameter varying as a function of the position of the contact 20 is the voltage level.
  • detection signal V D has a level substantially equal to a first predetermined voltage or is an electrical signal oscillating at a predetermined frequency between the first predetermined voltage and a second predetermined voltage when said electromechanical relay 2 is in open position.
  • the detection signal V D has a level substantially equal to the second predetermined voltage.
  • the first predetermined voltage is the zero value and the second predetermined voltage is 5V.
  • the predetermined voltages may have different values.
  • other parameters can be used for detecting the position of the contact 20.
  • the control device 1 of an electromechanical relay 2 further comprises means 5 for determining the switching time of the electromechanical relay 2.
  • the determining means 5 are in this embodiment in the processing unit 4.
  • the determination means 5 may be independent of the processing unit 4.
  • the determining means 5 are configured to determine the switching time of the electromechanical relay 2 which corresponds to the time elapsed between a first instant at which the electromechanical relay 2 is controlled at opening or closing and a second instant at which the open position or the closed position of the contact 20 is detected respectively.
  • the switching time t com is represented by the Figures 5a and 5b which will be described later.
  • FIG. figure 2 One embodiment of the detection means C is shown in FIG. figure 2 .
  • the figure 2 represents an electrical diagram in which an electromechanical relay 2 connected to a load 3, and detection means C are connected to an end 21 of the electromechanical relay 2.
  • the load 3 may be by way of non-limiting example an inductor in an induction hob.
  • the detection means C comprise a bipolar transistor T1 of the PNP type, a diode D1, a first capacitor C1 and a first resistor R1.
  • the diode D1, the capacitor C1 and the first resistor R1 are connected in parallel between the base T1 B and the emitter T1 E of the transistor T1.
  • the diode D1, the first capacitor C1 and the first resistor R1 are connected to the base T1 B of the transistor T1 by a first terminal, and to the emitter T1 E of the transistor T1 by its second terminal, this second terminal being connected at a supply voltage V CC (here having a value of for example 5 volts).
  • a second capacitor C2 and a second resistor R2 are connected in parallel between the T1 collector C of the transistor T1 and the reference potential 10, here having a value of 0 volts.
  • the end 21 of the electromechanical relay 2 is connected to the base T1 B of the transistor T1 through a third resistor R3.
  • the load 3 is not connected to the alternating signal V A , the detection of the open position or the electromechanical relay closed position 2 being implemented when the load 3 is not connected. at the alternating signal V A or powered.
  • the electromechanical relay 2 When the electromechanical relay 2 is open, that is to say that the contact 20 is in the open position, the diode D1 and the transistor T1 are in the off state, the detection signal V D being generated at a low level.
  • This low level is here 0 volts and is generated in particular by means of the second resistor R2.
  • the transistor T1 When the electromechanical relay 2 is closed, or the contact 20 is in the closed position, the transistor T1 is in the conduction state, the detection signal V D being generated at a high level, being here of a value of 5 volts.
  • the detection signal V D generated by the detection means C oscillates at a predetermined frequency between the low level and the high level when the electromechanical relay 2 is open.
  • the detection signal V D is generated at the high level in the same way as when the load 3 is disconnected from the alternating signal V A.
  • the detection of the open position or the closed position of the contact 20 is implemented when the load 3 is disconnected from the alternating signal V A , the detection of the instant of time at which the contact switches between one position and the other being implemented in a more precise manner.
  • the load 3 can be disconnected, for example if it is connected in series with a contact of a second electromechanical relay or an auxiliary contact for opening a door, for example a furnace.
  • the detection signal V D is addressed to the processing unit 4, this processing unit 4 being configured to decide on the open or closed position of the contact 20 of the electromechanical relay 2 as a function of the voltage level at which the control signal V D is generated by the detection means C.
  • the figure 3 represents a second embodiment of the control device 1 'of an electromechanical relay 2'.
  • an electromechanical relay 2 ' is disposed between a load 3' to be fed and the supply signal V A ', the supply signal V A ' being an alternating signal.
  • the electromechanical relay 2 ' has a movable contact 20' between an open position in which the alternating signal V A 'is not applied to the load 3' or a closed position in which the alternating signal V A 'is applied to the load 3 '.
  • the load 3' is powered or not powered by the supply signal V A '.
  • the control device 1 'of an electromechanical relay 2' further comprises synchronization means A ', configured to generate a logic electrical signal synchronized with the alternating signal V A '.
  • the synchronization means A ' are similar to the synchronization means A described with reference to the figure 1 . They detect the passage by 0 of the AC signal V A 'and generate a synchronization signal V B '.
  • the synchronization means A ' generate a synchronization signal V B ', which here is a square signal V B '( Figures 5a and 5b ), the square signal alternating between a high level and a low level regularly, indicating the passage through 0 of the AC signal V A ', and serving as a time reference of various control signals generated in the control device 1'.
  • the control device 1 'further comprises control means B' of the electromechanical relay 2 'configured to control the opening or closing of the electromechanical relay 2'.
  • control means B 'of the relay control the opening or closing of the electromechanical relay 2', that is to say control the switching of the electromechanical relay 2 ', depending on a signal of command V C '.
  • This control signal V C ' is for example generated by a processing unit 4' configured to control, in particular, the operation of the control device of the electromechanical relay 2 '.
  • the processing unit 4 ' is for example a microcontroller, a microprocessor or a programmable logic circuit and includes the programs or algorithms necessary for the operation of the control device 1' of the electromechanical relay 2 '.
  • control signal V C ' is a logic signal that can have two levels.
  • control means B ' control the closing of relays when the control signal V C ' changes from a low level (for example zero) to a high level (for example 5V), and on the contrary, the control means B 'control the opening of the electromechanical relay 2' when the control signal V C 'changes from a high level to a low level.
  • the electromechanical relay 2 ' is controlled in closing on a rising edge of the logic signal V C ' and in opening on a falling edge of the logic signal V C '.
  • the opening control can be implemented by a rising edge and the command in closing by a front go down. Also other types of control signals can be used.
  • control means B are known to those skilled in the art and do not need to be detailed.
  • the control device 1 'of an electromechanical relay 2' further comprises detection means C 'of the open position or of the closed position of the contact 20'.
  • the detection means C ' are configured to generate a detection signal V D '.
  • the detection means C ' are arranged near the electromechanical relay 2'.
  • the detection signal V D 'generated by the detection means C' comprises an electric pulse generated when the electromechanical relay 2 'changes state.
  • the processing unit 4 is configured to know the state of the electromechanical relay 2 'as a function of the detection signal V D '.
  • the unit of processing 4 ' when an electrical pulse is generated in the detection signal V D ', the unit of processing 4 'detects that a change in the state of the electromechanical relay 2' has been implemented.
  • the processing unit 4 ' detects the open or closed position of the contact 20'.
  • the control device 1 'of an electromechanical relay 2' further comprises means for determining 5 'of the switching time of the electromechanical relay 2'.
  • the determining means 5 ' are in this embodiment in the processing unit 4'.
  • the determining means 5 ' may be independent of the processing unit 4'.
  • the determining means 5 ' are configured to determine the switching time of the electromechanical relay 2' which corresponds to the time elapsed between a first instant at which the electromechanical relay 2 'is controlled on opening or closing and a second instant at which the open position or the closed position of the contact 20 'is detected respectively.
  • the switching time t com is represented by the Figures 5a and 5b which will be described later.
  • the figure 4 shows schematically an arrangement of different elements of the control device 1 'according to the embodiment shown in the figure 3 .
  • the electromechanical relay 2 ' is mounted on an electronic card 30', the load (not shown in FIG. figure 4 ) being connected to the electronic card 30 '.
  • the detection means C ' comprise a conductive surface 40.
  • this conductive surface 40 has a surface covered with a layer of metal, for example copper or another metal.
  • This conductive surface 40 has a significant dimension with respect to the dimension of the electromechanical relay 2 'and must be arranged at a sufficiently close distance from the electromechanical relay 2' so that when the contact 20 'of the electromechanical relay 2' toggles between a closed position and an open position and vice versa, an electrical pulse is generated on the conductive surface C '.
  • a detection signal V D ' is generated on the conductive surface when the contact 20' moves from an open position to a closed position or vice versa.
  • the detection means C ' are mounted under the electromechanical relay 2', in particular under the contact 20 'of the electromechanical relay 2'.
  • This positioning of the electromechanical relay 2 'and detection means C' allows a good detection of the disturbances or electrical impulses produced on the conductive surface 40 when the contact 20 'of the electromechanical relay 2' changes position.
  • the figure 5a represents a synchronization signal V B , V B ', the control signal V C , V C ' and a signal V S , V S 'representing the moment when a change of state of the electromechanical relay 2 has occurred , 2 '.
  • Detection of the open position comprises generating the detection signal V D , V D ', the signal V S , V S ' being generated as a function of the detection signal V D , V D , '.
  • the control of the electromechanical relay 2, 2 'in opening or closing, represented by the control signal V C , V C ' is implemented at a first instant t 1 , the contact 20, 20 'tilting in the open position or in the closed position at a second instant t 2 .
  • the first instant t 1 corresponds to the instant at which the control signal V C , V C 'changes its logic state.
  • the opening or closing control of the electromechanical relay is implemented at the rising edge of the control signal V C , V C '.
  • the second instant t 2 corresponds to the instant at which the signal V S , V S 'indicate that a change of state of the electromechanical relay 2, 2' has occurred.
  • the determining means 5 thus detect the switching time t com as the time elapsed between the first instant t 1 and the second instant t 2 .
  • this type of measurement is implemented before the first use of the control device 1, 1 '.
  • this measurement of the switching time t com can be carried out at the manufacturers, before the marketing of the appliance.
  • the measurement of the switching time t com is carried out at each switching of the electromechanical relay 2, 2 '.
  • This last embodiment has the advantage of taking into account the wear of the electromechanical relay 2, 2 ', this wear can change over time the switching time t com .
  • control opening or closing of the electromechanical relay 2, 2 ' can be adapted according to the evolution of the switching time of the electromechanical relay 2, 2' in time.
  • the detection signal V D is generated so that parameters of said detection signal V D are different depending on the open position or the closed position of the contact 20.
  • the electromechanical relay 2 when the detection signal V D has a level substantially equal to a first predetermined voltage or is an electrical signal oscillating at a predetermined frequency between the first predetermined voltage and a second predetermined voltage, the electromechanical relay 2 is in effect. open position, and when the detection signal V D has a level substantially equal to the second predetermined voltage, the electromechanical relay 2 is in the closed position.
  • the processing unit 4 as a function of the level of the detection signal V D deduces the open or closed position of the electromechanical relay 2.
  • an electric pulse is generated in the detection signal V D '.
  • processing unit 4 knows whether the electromechanical relay has switched to the open or closed position, the command being opened or closed having been implemented by the processing unit 4'.
  • the processing unit 4 ' when the electrical pulse is detected by the processing unit 4 ', the instant at which the contact 20' is positioned in the open or closed position, depending on the command from the processing unit 4 ', is determined, and the means for determining the switching time determine the switching time t com .
  • the figure 5b represents the control opening or closing of the electromechanical relay 2, 2 'in a case of normal operation.
  • figure 5b represents the manner in which the opening or closing command represented by the control signal V C , V C 'is delayed by a time t d with respect to a rising edge of the signal of synchronization V B , V B 'so that the contact 20, 20' is placed in the open position or in the closed position when the synchronization signal V B , V B 'is substantially equal to 0.
  • the sum of the delay time t d and the switching time t com is equal to three times the half-period of the alternating signal V A , V A 'or of the synchronization signal V B , V B .
  • the processing unit 4, 4 ' takes into account the switching time t com of the electromechanical relay 2, 2' to generate the control signal V C , V C 'at a first instant of time t 1 ' so that the contact 20, 20 'is placed in the open position or in the closed position when the alternating signal V A , V A ' is substantially equal to zero, that is to say a second instant of time t 2 '.
  • the switching time t com is therefore determined in order to take it into account when closing or opening the electromechanical relay 2, 2 'in a precise instant of time so as to avoid arcing as much as possible.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Relay Circuits (AREA)
  • Control Or Security For Electrophotography (AREA)

Description

La présente invention concerne un dispositif et un procédé de commande d'un relais électromécanique.The present invention relates to a device and a method for controlling an electromechanical relay.

Elle concerne également un appareil électroménager comprenant un tel dispositif de commande et mettant en oeuvre un tel procédé.It also relates to an electrical appliance comprising such a control device and implementing such a method.

Un relais électromécanique est par exemple utilisé dans un circuit d'alimentation d'une charge, par exemple un inducteur ou autre moyen de chauffage, afin de couper l'alimentation de la charge en cas de besoin.An electromechanical relay is for example used in a supply circuit of a load, for example an inductor or other heating means, in order to cut off the supply of the load when necessary.

Ainsi, le relais électromécanique est disposé entre la charge et un signal alternatif, par exemple un signal alternatif d'alimentation, de sorte à permettre ou à empêcher l'application du signal alternatif à la charge.Thus, the electromechanical relay is disposed between the load and an alternating signal, for example an AC supply signal, so as to allow or prevent the application of the AC signal to the load.

Le relais électromécanique comporte un contact pouvant présenter deux positions, une position ouverte dans laquelle le signal alternatif n'est pas appliqué à la charge et une position fermée dans laquelle le signal alternatif est appliqué à la charge.The electromechanical relay has a contact having two positions, an open position in which the AC signal is not applied to the load and a closed position in which the AC signal is applied to the load.

Lorsque le relais électromécanique change d'état, c'est-à-dire qu'il s'ouvre ou se ferme ou que le contact passe de la position fermée à la position ouverte ou vice-versa, et qu'un courant électrique circule à travers le contact, un arc électrique se produit dans le relais électromécanique au niveau du contact.When the electromechanical relay changes state, that is to say it opens or closes or the contact moves from the closed position to the open position or vice versa, and an electric current flows through the contact, an electric arc occurs in the electromechanical relay at the contact.

Les arcs électriques détériorent le contact du relais électromécanique, réduisant ainsi la durée de vie du relais électromécanique.Electrical arcing damages the contact of the electromechanical relay, thus reducing the life of the electromechanical relay.

Ainsi, il est avantageux de commander le changement d'état du relais électromécanique de sorte que le changement de position du contact se produise lorsque le signal alternatif est à zéro.Thus, it is advantageous to control the change of state of the electromechanical relay so that the change of position of the contact occurs when the alternating signal is at zero.

Afin de commander le changement d'état du relais électromécanique au moment adéquat, le temps de commutation du relais électromécanique, c'est-à-dire le temps écoulé entre l'instant auquel le relais électromécanique est commandé en ouverture ou en fermeture et l'instant auquel le contact passe de la position fermée à la position ouverte ou vice-versa, doit être connu et est pris en compte pour la commande du relais électromécanique.In order to control the change of state of the electromechanical relay at the appropriate moment, the switching time of the electromechanical relay, that is to say the time elapsed between the instant at which the electromechanical relay is controlled in opening or closing and the moment at which the contact goes from the closed position in the open position or vice versa, must be known and is taken into account for the control of the electromechanical relay.

On connait des dispositifs de commande dans lesquels le temps de commutation du relais électromécanique est connu de manière prédéterminée et un composant tel qu'un triac est disposé en parallèle du relais électromécanique, afin de commander l'ouverture ou la fermeture du relais électromécanique.Control devices are known in which the switching time of the electromechanical relay is known in a predetermined manner and a component such as a triac is arranged in parallel with the electromechanical relay, in order to control the opening or closing of the electromechanical relay.

Néanmoins, l'utilisation d'un tel composant limite la puissance d'alimentation de la charge, est onéreuse et prend de la place sur les cartes électroniques.Nevertheless, the use of such a component limits the power supply of the load, is expensive and takes up space on the electronic boards.

Dans le document EP 0 353 986 , le temps de commutation d'un relais électromécanique est mesuré au moyen d'un capteur optique détectant la présence d'un arc électrique.In the document EP 0 353 986 , the switching time of an electromechanical relay is measured by means of an optical sensor detecting the presence of an electric arc.

Dans ce document, une fois le temps de commutation calculé, la commande du relais électromécanique est mise en oeuvre de telle façon que l'ouverture ou la fermeture du contact du relais électromécanique est mise en oeuvre lorsque la tension d'alimentation est nulle, c'est-à-dire lorsqu'aucun courant ne circule à travers le contact.In this document, once the switching time has been calculated, the control of the electromechanical relay is implemented in such a way that the opening or closing of the contact of the electromechanical relay is implemented when the supply voltage is zero, c that is, when no current is flowing through the contact.

Néanmoins, un tel système nécessite pour son implémentation des composants spécifiques tels les capteurs optiques, et est onéreux. Le document WO 90/10942 A1 divulgue un dispositif de commande d'un relais électromécanique selon le préambule de la revendication 1. La présente invention a pour but de proposer un dispositif de commande d'un relais électromécanique permettant de limiter l'usure du relais électromécanique et ainsi d'allonger sa durée de vie tout en utilisant des composants génériques, en limitant ainsi son coût.Nevertheless, such a system requires for its implementation specific components such as optical sensors, and is expensive. The document WO 90/10942 A1 discloses a device for controlling an electromechanical relay according to the preamble of claim 1. The object of the present invention is to propose a device for controlling an electromechanical relay that makes it possible to limit the wear of the electromechanical relay and thus to lengthen its lifetime while using generic components, thus limiting its cost.

A cet effet, la présente invention vise, selon un premier aspect, un dispositif de commande d'un relais électromécanique, le relais électromécanique étant disposé entre une charge et un signal alternatif et comportant un contact mobile entre une position ouverte dans laquelle le signal alternatif n'est pas appliqué à la charge ou une position fermée dans laquelle le signal alternatif est appliqué à la charge, le dispositif de commande comportant des moyens de commande du relais électromécanique configurés pour commander l'ouverture ou la fermeture du relais électromécanique prenant en compte un temps de commutation, de sorte que le contact se place en position ouverte ou en position fermée lorsque le signal alternatif est sensiblement égal à zéro.For this purpose, the present invention aims, in a first aspect, a control device of an electromechanical relay, the electromechanical relay being disposed between a load and an alternating signal and having a movable contact between an open position in which the alternating signal is not applied to the load or a closed position in which the AC signal is applied to the load, the controller having electromechanical relay control means configured to control the opening or closing of the electromechanical relay has a switching time, so that the contact is placed in the open position or in the closed position when the alternating signal is substantially equal to zero.

Selon l'invention, le dispositif de commande d'un relais électromécanique comporte :

  • des moyens de détection de la position ouverte ou de la position fermée du contact les moyens de détection comportant une surface conductrice, et sont configurés pour générer le signal de détection sur la surface conductrice lorsque le contact passe de la position ouverte à la position fermée ou vice-versa ; et
  • des moyens de détermination dudit temps de commutation, ledit temps de commutation correspondant au temps écoulé entre un premier instant auquel le relais électromécanique est commandé en ouverture ou fermeture et un second instant auquel la position ouverte ou la position fermée du contact est détectée respectivement par les moyens de détection.
According to the invention, the control device of an electromechanical relay comprises:
  • means for detecting the open position or the closed position of the contact the detection means having a conductive surface, and are configured to generate the detection signal on the conductive surface when the contact moves from the open position to the closed position or vice versa ; and
  • means for determining said switching time, said switching time corresponding to the time elapsed between a first instant at which the electromechanical relay is controlled on opening or closing and a second instant at which the open position or the closed position of the contact is detected respectively by the detection means.

Ainsi, le temps de commutation du relais électromécanique est déterminé de façon simplifiée et de façon fiable grâce à la présence des moyens de détection de la position du contact du relais électromécanique, ce temps de commutation étant utilisé pour générer la commande en ouverture ou en fermeture du relais électromécanique sans qu'aucun arc électrique ne se produise.Thus, the switching time of the electromechanical relay is determined in a simplified manner and reliably thanks to the presence of the contact position detection means of the electromechanical relay, this switching time being used to generate the control opening or closing electromechanical relay without any electric arc occurring.

En outre, la fermeture ou ouverture du relais électromécanique est détectée en fonction du signal de détection généré sur la surface conductrice.In addition, the closing or opening of the electromechanical relay is detected according to the detection signal generated on the conductive surface.

Selon une caractéristique, le signal de détection présente des paramètres différents en fonction de la position ouverte ou de la position fermée du contact.According to one characteristic, the detection signal has different parameters depending on the open position or the closed position of the contact.

La position ouverte ou fermée du contact peut ainsi être connue en fonction des paramètres du signal de détection généré par les moyens de détection.The open or closed position of the contact can thus be known as a function of the parameters of the detection signal generated by the detection means.

Selon une caractéristique, les moyens de détection sont disposés à proximité du relais électromécanique.According to one characteristic, the detection means are arranged near the electromechanical relay.

Selon un mode de réalisation, la surface conductrice comporte une surface recouverte d'une couche de métal.According to one embodiment, the conductive surface comprises a surface covered with a metal layer.

Par exemple, les moyens de détection sont montés sur une carte électronique.For example, the detection means are mounted on an electronic card.

Dans un autre exemple, le relais électromécanique est monté sur la carte électronique et les moyens de détection sont montés sous le contact du relais électromécanique.In another example, the electromechanical relay is mounted on the electronic card and the detection means are mounted under the contact of the electromechanical relay.

La présente invention concerne selon un deuxième aspect, un procédé de commande d'un relais électromécanique, le relais électromécanique étant disposé entre une charge et un signal alternatif et comportant un contact mobile entre une position ouverte dans laquelle le signal alternatif n'est pas appliqué à la charge et une position fermée dans laquelle le signal alternatif est appliqué à la charge, le procédé de commande comportant une étape de commande en ouverture ou fermeture du relais électromécanique prenant en compte un temps de commutation, de sorte que le contact se place en position ouverte ou en position fermée lorsque le signal alternatif est sensiblement égal à zéro.According to a second aspect, the present invention relates to a method for controlling an electromechanical relay, the electromechanical relay being arranged between a load and an alternating signal and comprising a movable contact between an open position in which the alternating signal is not applied. to the load and a closed position in which the AC signal is applied to the load, the control method comprising a control step in opening or closing of the electromechanical relay taking into account a switching time, so that the contact is placed in open position or in closed position when the AC signal is substantially zero.

Selon l'invention, le procédé comporte en outre les étapes suivantes :

  • détection de la position ouverte ou de la position fermée du contact la détection de la position ouverte ou la position fermée comportant la génération d'un signal de détection, le signal de détection est généré sur une surface conductrice formant des moyens de détection ; et
  • détermination du temps de commutation, ledit temps de commutation correspondant au temps écoulé entre un premier instant dans lequel le relais électromécanique est commandé en ouverture ou fermeture et un second instant dans lequel la position ouverte ou la position fermée du contact est détectée.
According to the invention, the method further comprises the following steps:
  • detecting the open position or the closed position of the open position detection or the closed position comprising the generation of a detection signal, the detection signal is generated on a conductive surface forming detection means; and
  • determination of the switching time, said switching time corresponding to the time elapsed between a first instant in which the electromechanical relay is controlled in opening or closing and a second instant in which the open position or the closed position of the contact is detected.

Selon une caractéristique, le signal de détection est généré de sorte que des paramètres du signal de détection sont différents en fonction de la position ouverte ou de la position fermée du contact.According to one characteristic, the detection signal is generated so that parameters of the detection signal are different depending on the open position or the closed position of the contact.

Selon un mode de réalisation, l'étape de détection est mise en oeuvre lorsque ladite charge est déconnectée du signal alternatif.According to one embodiment, the detection step is implemented when said load is disconnected from the AC signal.

La présente invention concerne selon un troisième aspect, un appareil électroménager comportant au moins une charge et un relais électromécanique disposé entre la charge et un signal alternatif et comportant un contact mobile entre une position ouverte dans laquelle le signal alternatif n'est pas appliqué à la charge et une position fermée dans laquelle le signal alternatif est appliqué à la charge, l'appareil électroménager comportant en outre un dispositif de commande d'un relais électromécanique conforme à l'invention.According to a third aspect, the present invention relates to a household appliance comprising at least one load and an electromechanical relay disposed between the load and an alternating signal and comprising a movable contact between an open position in which the alternating signal is not applied to the load and a closed position in which the AC signal is applied to the load, the appliance further comprising a control device of an electromechanical relay according to the invention.

Le procédé de commande d'un relais électromécanique et l'appareil électroménager présentent des caractéristiques et avantages analogues à ceux décrits précédemment en relation avec le dispositif de commande d'un relais électromécanique.The method of controlling an electromechanical relay and the appliance has similar features and advantages to those described above in connection with the control device of an electromechanical relay.

D'autres particularités et avantages de l'invention apparaîtront encore dans la description ci-après.Other features and advantages of the invention will become apparent in the description below.

Aux dessins annexés, donnés à titre d'exemples non limitatifs :

  • la figure 1 est un schéma représentant un dispositif de commande d'un relais électromécanique selon un mode de réalisation ;
  • la figure 2 est un schéma électrique d'une partie du dispositif de commande selon un mode de réalisation ;
  • la figure 3 est un schéma représentant un dispositif de commande d'un relais électromécanique selon un autre mode de réalisation;
  • la figure 4 est un schéma électrique d'une partie du dispositif de commande de la figure 3 ; et
  • les figures 5a et 5b illustrent des courbes représentant des signaux électriques dans le dispositif de commande conforme à l'invention.
In the accompanying drawings, given as non-limiting examples:
  • the figure 1 is a diagram showing a control device of an electromechanical relay according to one embodiment;
  • the figure 2 is a circuit diagram of a part of the control device according to one embodiment;
  • the figure 3 is a diagram showing a control device of an electromechanical relay according to another embodiment;
  • the figure 4 is a circuit diagram of a part of the control device of the figure 3 ; and
  • the Figures 5a and 5b illustrate curves representing electrical signals in the control device according to the invention.

La présente invention trouve son application dans tout type d'appareil électroménager tel qu'une table de cuisson, par exemple à induction, un four, une cuisinière, un appareil à laver et/ou sécher le-linge ou un lave-vaisselle.The present invention finds application in any type of household appliance such as a hob, for example induction, an oven, a stove, a washing machine and / or drying machine or a dishwasher.

Un appareil électroménager est alimenté électriquement par une alimentation du réseau électrique alternatif ou alimentation secteur et comporte typiquement un relais électromécanique disposé entre l'alimentation électrique et une charge à alimenter.A household appliance is electrically powered by a power supply of the AC mains or mains supply and typically comprises an electromechanical relay disposed between the power supply and a load to be powered.

La figure 1 représente un dispositif de commande 1 d'un relais électromécanique 2 pouvant être utilisé dans un appareil électroménager selon un premier mode de réalisation.The figure 1 represents a control device 1 of an electromechanical relay 2 that can be used in a household appliance according to a first embodiment.

Un relais électromécanique 2 est disposé entre une charge 3 à alimenter et le signal d'alimentation VA, le signal d'alimentation VA étant un signal alternatif.An electromechanical relay 2 is arranged between a load 3 to be powered and the supply signal V A , the supply signal V A being an alternating signal.

Le relais électromécanique 2 comporte un contact 20 mobile entre une position ouverte dans laquelle le signal alternatif VA n'est pas appliqué à la charge 3 ou une position fermée dans laquelle le signal alternatif VA est appliqué à la charge 3.The electromechanical relay 2 comprises a movable contact 20 between an open position in which the alternating signal V A is not applied to the load 3 or a closed position in which the alternating signal V A is applied to the load 3.

Ainsi, en fonction de la position du contact 20, la charge 3 est alimentée ou pas alimentée par le signal d'alimentation VA.Thus, depending on the position of the contact 20, the load 3 is powered or not powered by the supply signal V A.

Le dispositif de commande 1 d'un relais électromécanique 2 comporte en outre des moyens de synchronisation A, configurés pour générer un signal électrique logique synchronisé avec le signal alternatif VA.The control device 1 of an electromechanical relay 2 further comprises synchronization means A, configured to generate a logic electrical signal synchronized with the alternating signal V A.

Les moyens de synchronisation A détectent le passage par 0 du signal alternatif VA et génèrent un signal de synchronisation VB.The synchronization means A detect the passage by 0 of the alternating signal V A and generate a synchronization signal V B.

Ainsi, dans un mode de réalisation, les moyens de synchronisation A génèrent un signal de synchronisation VB, qui est ici un signal carré VB (figures 5a et 5b), le signal carré alternant entre un niveau haut et un niveau bas régulièrement, indiquant le passage par 0 du signal alternatif VA, et servant comme référence temporelle de divers signaux de commande générés dans le dispositif de commande 1.Thus, in one embodiment, the synchronization means A generate a synchronization signal V B , which is here a square signal V B ( Figures 5a and 5b ), the square signal alternating between a high level and a low level regularly, indicating the passage by 0 of the AC signal V A , and serving as a time reference of various control signals generated in the control device 1.

Le dispositif de commande 1 comporte en outre des moyens de commande B du relais électromécanique 3 configurés pour commander l'ouverture ou la fermeture du relais électromécanique 3.The control device 1 further comprises control means B of the electromechanical relay 3 configured to control the opening or closing of the electromechanical relay 3.

Ainsi, lorsque les moyens de commande B commandent l'ouverture du relais électromécanique 2, le contact 20 est placé en position ouverte et lorsque les moyens de commande B commandent la fermeture du relais électromécanique 2, le contact 20 est placé en position fermée.Thus, when the control means B control the opening of the electromechanical relay 2, the contact 20 is placed in the open position and when the control means B control the closure of the electromechanical relay 2, the contact 20 is placed in the closed position.

Dans un mode de réalisation, les moyens de commande B du relais commandent l'ouverture ou la fermeture du relais électromécanique 2, c'est-à-dire commandent la commutation du relais électromécanique 2, en fonction d'un signal de commande VC. Ce signal de commande VC est par exemple généré par une unité de traitement 4 configuré pour commander, en particulier, le fonctionnement du dispositif de commande du relais électromécanique 2.In one embodiment, the control means B of the relay control the opening or closing of the electromechanical relay 2, that is to say control the switching of the electromechanical relay 2, as a function of a control signal V C . This control signal V C is for example generated by a processing unit 4 configured to control, in particular, the operation of the control device of the electromechanical relay 2.

L'unité de traitement 4 est par exemple un microcontrôleur, un microprocesseur ou un circuit logique programmable et comporte les programmes ou algorithmes nécessaires au fonctionnement du dispositif de commande 1 du relais électromécanique 2.The processing unit 4 is for example a microcontroller, a microprocessor or a programmable logic circuit and includes the programs or algorithms necessary for the operation of the control device 1 of the electromechanical relay 2.

Par exemple, le signal de commande VC est un signal logique qui peut présenter deux niveaux. A titre d'exemple, les moyens de commande B commandent la fermeture de relais lorsque le signal de commande VC change d'un niveau bas (par exemple nul) à un niveau haut (par exemple 5V), et au contraire, les moyens de commande B commandent l'ouverture du relais électromécanique 2 lorsque le signal de commande VC change d'un niveau haut à un niveau bas. Dans cet exemple, le relais électromécanique 2 est commandé en fermeture lors d'un front montant du signal logique VC et en ouverture lors d'un front descendent du signal logique VC.For example, the control signal V C is a logic signal that can have two levels. By way of example, the control means B control the closing of relays when the control signal V C changes from a low level (for example zero) to a high level (for example 5V), and on the contrary, the means control B control the opening of the electromechanical relay 2 when the control signal V C changes from a high level to a low level. In this example, the electromechanical relay 2 is controlled in closing on a rising edge of the logic signal V C and in opening on a falling edge of the logic signal V C.

Bien entendu, la commande en ouverture peut être mise en oeuvre par un front montant et la commande en en fermeture par un front descendent. Aussi d'autres types de signaux de commande peuvent être utilisés.Of course, the opening control can be implemented by a rising edge and the command in closing by a front go down. Also other types of control signals can be used.

Les moyens de commande B sont connus de l'homme du métier et ne nécessitent pas d'être détaillés.The control means B are known to those skilled in the art and do not need to be detailed.

Le dispositif de commande 1 d'un relais électromécanique 2 comporte en outre des moyens de détection C de la position ouverte ou de la position fermée du contact 20.The control device 1 of an electromechanical relay 2 further comprises detection means C of the open position or of the closed position of the contact 20.

Les moyens de détection C sont configurés pour générer un signal de détection VD.The detection means C are configured to generate a detection signal V D.

Dans le mode de réalisation décrit en référence à la figure 1, les moyens de détection C sont reliés à une extrémité 21 du relais électromécanique 2.In the embodiment described with reference to the figure 1 the detection means C are connected to an end 21 of the electromechanical relay 2.

Le signal de détection VD généré par les moyens de détection C présente des paramètres différents en fonction de la position ouverte ou de la position fermée du contact 20.The detection signal V D generated by the detection means C has different parameters depending on the open position or the closed position of the contact 20.

Dans un mode de réalisation, le paramètre variant en fonction de la position du contact 20 est le niveau de tension.In one embodiment, the parameter varying as a function of the position of the contact 20 is the voltage level.

Ainsi, dans un mode de réalisation, signal de détection VD présente un niveau sensiblement égal à une première tension prédéterminée ou est un signal électrique oscillant à une fréquence prédéterminée entre la première tension prédéterminée et une seconde tension prédéterminée lorsque ledit relais électromécanique 2 est en position ouverte.Thus, in one embodiment, detection signal V D has a level substantially equal to a first predetermined voltage or is an electrical signal oscillating at a predetermined frequency between the first predetermined voltage and a second predetermined voltage when said electromechanical relay 2 is in open position.

Au contraire, lorsque ledit relais électromécanique 2 est en position fermée, le signal de détection VD présente un niveau sensiblement égal à la seconde tension prédéterminée.On the contrary, when said electromechanical relay 2 is in the closed position, the detection signal V D has a level substantially equal to the second predetermined voltage.

Dans un exemple de réalisation, la première tension prédéterminée est la valeur nulle et la seconde tension prédéterminée est 5V.In an exemplary embodiment, the first predetermined voltage is the zero value and the second predetermined voltage is 5V.

Bien entendu, les tensions prédéterminées peuvent présenter des valeurs différentes. En outre, d'autres paramètres peuvent être employés pour la détection de la position du contact 20.Of course, the predetermined voltages may have different values. In addition, other parameters can be used for detecting the position of the contact 20.

Le dispositif de commande 1 d'un relais électromécanique 2 comporte en outre des moyens de détermination 5 du temps de commutation du relais électromécanique 2.The control device 1 of an electromechanical relay 2 further comprises means 5 for determining the switching time of the electromechanical relay 2.

Les moyens de détermination 5 sont dans ce mode de réalisation dans l'unité de traitement 4.The determining means 5 are in this embodiment in the processing unit 4.

Néanmoins, les moyens de détermination 5 peuvent être indépendants de l'unité de traitement 4.Nevertheless, the determination means 5 may be independent of the processing unit 4.

Les moyens de détermination 5 sont configurés pour déterminer le temps de commutation du relais électromécanique 2 qui correspond au temps écoulé entre un premier instant auquel le relais électromécanique 2 est commandé en ouverture ou fermeture et un second instant auquel la position ouverte ou la position fermée du contact 20 est détectée respectivement.The determining means 5 are configured to determine the switching time of the electromechanical relay 2 which corresponds to the time elapsed between a first instant at which the electromechanical relay 2 is controlled at opening or closing and a second instant at which the open position or the closed position of the contact 20 is detected respectively.

Le temps de commutation tcom est représenté par les figures 5a et 5b qui seront décrites ultérieurement.The switching time t com is represented by the Figures 5a and 5b which will be described later.

Un mode de réalisation des moyens de détection C est représenté à la figure 2.One embodiment of the detection means C is shown in FIG. figure 2 .

La figure 2 représente un schéma électrique dans lequel un relais électromécanique 2 connecté à une charge 3, et des moyens de détection C sont reliés à une extrémité 21 du relais électromécanique 2.The figure 2 represents an electrical diagram in which an electromechanical relay 2 connected to a load 3, and detection means C are connected to an end 21 of the electromechanical relay 2.

La charge 3 peut être à titre d'exemple non limitatif un inducteur dans une table de cuisson à induction.The load 3 may be by way of non-limiting example an inductor in an induction hob.

Dans ce mode de réalisation, les moyens de détection C comportent un transistor T1 bipolaire du type PNP, une diode D1, un premier condensateur C1 et une première résistance R1.In this embodiment, the detection means C comprise a bipolar transistor T1 of the PNP type, a diode D1, a first capacitor C1 and a first resistor R1.

La diode D1, le condensateur C1 et la première résistance R1 sont connectés en parallèle entre la base T1B et l'émetteur T1E du transistor T1.The diode D1, the capacitor C1 and the first resistor R1 are connected in parallel between the base T1 B and the emitter T1 E of the transistor T1.

Ainsi, la diode D1, le premier condensateur C1 et la première résistance R1 sont reliés à la base T1B du transistor T1 par une première borne, et à l'émetteur T1E du transistor T1 par sa deuxième borne, cette deuxième borne étant reliée à une tension d'alimentation VCC (ici ayant une valeur de par exemple 5 volts).Thus, the diode D1, the first capacitor C1 and the first resistor R1 are connected to the base T1 B of the transistor T1 by a first terminal, and to the emitter T1 E of the transistor T1 by its second terminal, this second terminal being connected at a supply voltage V CC (here having a value of for example 5 volts).

Un deuxième condensateur C2 et une deuxième résistance R2 sont connectés en parallèle entre le collecteur T1C du transistor T1 et le potentiel de référence 10, ayant ici une valeur de 0 volts.A second capacitor C2 and a second resistor R2 are connected in parallel between the T1 collector C of the transistor T1 and the reference potential 10, here having a value of 0 volts.

L'extrémité 21 du relais électromécanique 2 est reliée à la base T1B du transistor T1 à travers une troisième résistance R3.The end 21 of the electromechanical relay 2 is connected to the base T1 B of the transistor T1 through a third resistor R3.

On notera que dans les schémas électriques représentés, la charge 3 n'est pas connectée au signal alternatif VA, la détection de la position ouverte ou de la position fermée relais électromécanique 2 étant mise en oeuvre lorsque la charge 3 n'est pas connectée au signal alternatif VA ou alimentée.Note that in the electrical diagrams shown, the load 3 is not connected to the alternating signal V A , the detection of the open position or the electromechanical relay closed position 2 being implemented when the load 3 is not connected. at the alternating signal V A or powered.

Lorsque le relais électromécanique 2 est ouvert, c'est-à-dire que le contact 20 est en position ouverte, la diode D1 et le transistor T1 se trouvent en état bloqué, le signal de détection VD étant généré à un niveau bas. Ce niveau bas est ici de 0 volts et est généré en particulier au moyen de la deuxième résistance R2.When the electromechanical relay 2 is open, that is to say that the contact 20 is in the open position, the diode D1 and the transistor T1 are in the off state, the detection signal V D being generated at a low level. This low level is here 0 volts and is generated in particular by means of the second resistor R2.

Lorsque le relais électromécanique 2 est fermé, ou que le contact 20 se trouve en position fermée, le transistor T1 se trouve en état de conduction, le signal de détection VD étant généré à un niveau haut, étant ici d'une valeur de 5 volts.When the electromechanical relay 2 is closed, or the contact 20 is in the closed position, the transistor T1 is in the conduction state, the detection signal V D being generated at a high level, being here of a value of 5 volts.

Lorsque la charge 3 est connectée signal alternatif VA, le signal de détection VD généré par les moyens de détection C oscille à une fréquence prédéterminée entre le niveau bas et le niveau haut lorsque le relais électromécanique 2 est ouvert.When the load 3 is connected to the AC signal V A , the detection signal V D generated by the detection means C oscillates at a predetermined frequency between the low level and the high level when the electromechanical relay 2 is open.

Lorsque le relais électromécanique 2 est fermé, le signal de détection VD est généré au niveau haut de la même façon que lorsque la charge 3 est déconnectée du signal alternatif VA.When the electromechanical relay 2 is closed, the detection signal V D is generated at the high level in the same way as when the load 3 is disconnected from the alternating signal V A.

Ainsi, dans un mode de réalisation, la détection de la position ouverte ou de la position fermée du contact 20 est mise en oeuvre lorsque la charge 3 est déconnectée du signal alternatif VA, la détection de l'instant de temps auquel le contact bascule entre une position et l'autre étant mise en oeuvre d'une façon plus précise.Thus, in one embodiment, the detection of the open position or the closed position of the contact 20 is implemented when the load 3 is disconnected from the alternating signal V A , the detection of the instant of time at which the contact switches between one position and the other being implemented in a more precise manner.

La charge 3 peut être déconnectée par exemple si elle est connectée en série avec un contact d'un deuxième relais électromécanique ou un contact auxiliaire d'ouverture d'une porte, par exemple d'un four.The load 3 can be disconnected, for example if it is connected in series with a contact of a second electromechanical relay or an auxiliary contact for opening a door, for example a furnace.

Le signal de détection VD est adressé à l'unité de traitement 4, cette unité de traitement 4 étant configurée pour décider de la position ouverte ou fermée du contact 20 du relais électromécanique 2 en fonction du niveau de tension auquel le signal de commande VD est généré par les moyens de détection C.The detection signal V D is addressed to the processing unit 4, this processing unit 4 being configured to decide on the open or closed position of the contact 20 of the electromechanical relay 2 as a function of the voltage level at which the control signal V D is generated by the detection means C.

La figure 3 représente un deuxième mode de réalisation du dispositif de commande 1' d'un relais électromécanique 2'.The figure 3 represents a second embodiment of the control device 1 'of an electromechanical relay 2'.

Sur la figure 3, un relais électromécanique 2' est disposé entre une charge 3' à alimenter et le signal d'alimentation VA', le signal d'alimentation VA' étant un signal alternatif.On the figure 3 an electromechanical relay 2 'is disposed between a load 3' to be fed and the supply signal V A ', the supply signal V A ' being an alternating signal.

Le relais électromécanique 2' comporte un contact 20' mobile entre une position ouverte dans laquelle le signal alternatif VA' n'est pas appliqué à la charge 3' ou une position fermée dans laquelle le signal alternatif VA' est appliqué à la charge 3'.The electromechanical relay 2 'has a movable contact 20' between an open position in which the alternating signal V A 'is not applied to the load 3' or a closed position in which the alternating signal V A 'is applied to the load 3 '.

Ainsi, en fonction de la position du contact 20', la charge 3' est alimentée ou pas alimentée par le signal d'alimentation VA'.Thus, depending on the position of the contact 20 ', the load 3' is powered or not powered by the supply signal V A '.

Le dispositif de commande 1' d'un relais électromécanique 2' comporte en outre des moyens de synchronisation A', configurés pour générer un signal électrique logique synchronisé avec le signal alternatif VA'.The control device 1 'of an electromechanical relay 2' further comprises synchronization means A ', configured to generate a logic electrical signal synchronized with the alternating signal V A '.

Les moyens de synchronisation A' sont similaires au moyens de synchronisation A décrits en référence à la figure 1. Ils détectent le passage par 0 du signal alternatif VA' et génèrent un signal de synchronisation VB'.The synchronization means A 'are similar to the synchronization means A described with reference to the figure 1 . They detect the passage by 0 of the AC signal V A 'and generate a synchronization signal V B '.

Ainsi, dans un mode de réalisation, les moyens de synchronisation A' génèrent un signal de synchronisation VB', qui est ici un signal carré VB' (figures 5a et 5b), le signal carré alternant entre un niveau haut et un niveau bas régulièrement, indiquant le passage par 0 du signal alternatif VA', et servant comme référence temporelle de divers signaux de commande générés dans le dispositif de commande 1'.Thus, in one embodiment, the synchronization means A 'generate a synchronization signal V B ', which here is a square signal V B '( Figures 5a and 5b ), the square signal alternating between a high level and a low level regularly, indicating the passage through 0 of the AC signal V A ', and serving as a time reference of various control signals generated in the control device 1'.

Le dispositif de commande 1' comporte en outre des moyens de commande B' du relais électromécanique 2' configurés pour commander l'ouverture ou la fermeture du relais électromécanique 2'.The control device 1 'further comprises control means B' of the electromechanical relay 2 'configured to control the opening or closing of the electromechanical relay 2'.

Ainsi, lorsque les moyens de commande B' commandent l'ouverture du relais électromécanique 2', le contact 20' est placé en position ouverte et lorsque les moyens de commande B' commandent la fermeture du relais électromécanique 2', le contact 20' est placé en position fermée.Thus, when the control means B 'control the opening of the electromechanical relay 2', the contact 20 'is placed in the open position and when the control means B' control the closing of the electromechanical relay 2 ', the contact 20' is placed in closed position.

Dans un mode de réalisation, les moyens de commande B' du relais commandent l'ouverture ou la fermeture du relais électromécanique 2', c'est-à-dire commandent la commutation du relais électromécanique 2', en fonction d'un signal de commande VC'. Ce signal de commande VC' est par exemple généré par une unité de traitement 4' configuré pour commander, en particulier, le fonctionnement du dispositif de commande du relais électromécanique 2'.In one embodiment, the control means B 'of the relay control the opening or closing of the electromechanical relay 2', that is to say control the switching of the electromechanical relay 2 ', depending on a signal of command V C '. This control signal V C 'is for example generated by a processing unit 4' configured to control, in particular, the operation of the control device of the electromechanical relay 2 '.

L'unité de traitement 4' est par exemple un microcontrôleur, un microprocesseur ou un circuit logique programmable et comporte les programmes ou algorithmes nécessaires au fonctionnement du dispositif de commande 1' du relais électromécanique 2'.The processing unit 4 'is for example a microcontroller, a microprocessor or a programmable logic circuit and includes the programs or algorithms necessary for the operation of the control device 1' of the electromechanical relay 2 '.

Par exemple, le signal de commande VC' est un signal logique qui peut présenter deux niveaux. A titre d'exemple, les moyens de commande B' commandent la fermeture de relais lorsque le signal de commande VC' change d'un niveau bas (par exemple nul) à un niveau haut (par exemple 5V), et au contraire, les moyens de commande B' commandent l'ouverture du relais électromécanique 2' lorsque le signal de commande VC' change d'un niveau haut à un niveau bas. Dans cet exemple, le relais électromécanique 2' est commandé en fermeture lors d'un front montant du signal logique VC' et en ouverture lors d'un front descendent du signal logique VC'.For example, the control signal V C 'is a logic signal that can have two levels. By way of example, the control means B 'control the closing of relays when the control signal V C ' changes from a low level (for example zero) to a high level (for example 5V), and on the contrary, the control means B 'control the opening of the electromechanical relay 2' when the control signal V C 'changes from a high level to a low level. In this example, the electromechanical relay 2 'is controlled in closing on a rising edge of the logic signal V C ' and in opening on a falling edge of the logic signal V C '.

Bien entendu, la commande en ouverture peut être mise en oeuvre par un front montant et la commande en en fermeture par un front descendent. Aussi d'autres types de signaux de commande peuvent être utilisés.Of course, the opening control can be implemented by a rising edge and the command in closing by a front go down. Also other types of control signals can be used.

Les moyens de commande B' sont connus de l'homme du métier et ne nécessitent pas d'être détaillés.The control means B 'are known to those skilled in the art and do not need to be detailed.

Le dispositif de commande 1' d'un relais électromécanique 2' comporte en outre des moyens de détection C' de la position ouverte ou de la position fermée du contact 20'.The control device 1 'of an electromechanical relay 2' further comprises detection means C 'of the open position or of the closed position of the contact 20'.

Les moyens de détection C' sont configurés pour générer un signal de détection VD'.The detection means C 'are configured to generate a detection signal V D '.

Dans le mode de réalisation décrit en référence à la figure 3, les moyens de détection C' sont disposés à proximité du relais électromécanique 2'.In the embodiment described with reference to the figure 3 , the detection means C 'are arranged near the electromechanical relay 2'.

Dans ce mode de réalisation, il n'existe pas de contact physique entre le relais électromécanique 2' et les moyens de détection C'.In this embodiment, there is no physical contact between the electromechanical relay 2 'and the detection means C'.

Dans un mode de réalisation, le signal de détection VD' généré par les moyens de détection C' comporte une impulsion électrique générée lorsque le relais électromécanique 2' change d'état.In one embodiment, the detection signal V D 'generated by the detection means C' comprises an electric pulse generated when the electromechanical relay 2 'changes state.

L'unité de traitement 4 est configurée pour connaître l'état du relais électromécanique 2' en fonction du signal de détection VD'.The processing unit 4 is configured to know the state of the electromechanical relay 2 'as a function of the detection signal V D '.

En particulier, dans le mode de réalisation décrit, lorsqu'une impulsion électrique est générée dans le signal de détection VD', l'unité de traitement 4' détecte qu'un changement dans l'état du relais électromécanique 2' a été mise en oeuvre.In particular, in the embodiment described, when an electrical pulse is generated in the detection signal V D ', the unit of processing 4 'detects that a change in the state of the electromechanical relay 2' has been implemented.

En particulier, l'unité de traitement 4', en fonction du signal de commande VC' généré et du signal de détection VD', détecte la position ouverte ou fermée du contact 20'.In particular, the processing unit 4 ', as a function of the control signal V C ' generated and the detection signal V D ', detects the open or closed position of the contact 20'.

Le dispositif de commande 1' d'un relais électromécanique 2' comporte en outre des moyens de détermination 5' du temps de commutation du relais électromécanique 2'.The control device 1 'of an electromechanical relay 2' further comprises means for determining 5 'of the switching time of the electromechanical relay 2'.

Les moyens de détermination 5' sont dans ce mode de réalisation dans l'unité de traitement 4'.The determining means 5 'are in this embodiment in the processing unit 4'.

Néanmoins, les moyens de détermination 5' peuvent être indépendants de l'unité de traitement 4'.Nevertheless, the determining means 5 'may be independent of the processing unit 4'.

Les moyens de détermination 5' sont configurés pour déterminer le temps de commutation du relais électromécanique 2' qui correspond au temps écoulé entre un premier instant auquel le relais électromécanique 2' est commandé en ouverture ou fermeture et un second instant auquel la position ouverte ou la position fermée du contact 20' est détectée respectivement.The determining means 5 'are configured to determine the switching time of the electromechanical relay 2' which corresponds to the time elapsed between a first instant at which the electromechanical relay 2 'is controlled on opening or closing and a second instant at which the open position or the closed position of the contact 20 'is detected respectively.

Le temps de commutation tcom est représenté par les figures 5a et 5b qui seront décrites ultérieurement.The switching time t com is represented by the Figures 5a and 5b which will be described later.

La figure 4 montre d'une façon schématique une disposition de différents éléments du dispositif de commande 1' selon le mode de réalisation représenté sur la figure 3.The figure 4 shows schematically an arrangement of different elements of the control device 1 'according to the embodiment shown in the figure 3 .

Dans le mode de réalisation décrit, le relais électromécanique 2' est monté sur une carte électronique 30', la charge (non représentée sur la figure 4) étant connectée à la carte électronique 30'.In the embodiment described, the electromechanical relay 2 'is mounted on an electronic card 30', the load (not shown in FIG. figure 4 ) being connected to the electronic card 30 '.

Sur la carte électronique 30', sont montés en outre les moyens de détection C'.On the electronic card 30 'are further mounted the detection means C'.

Dans ce mode de réalisation, les moyens de détection C' comportent une surface conductrice 40.In this embodiment, the detection means C 'comprise a conductive surface 40.

Dans un mode de réalisation, cette surface conductrice 40 comporte une surface recouverte d'une couche de métal, par exemple de cuivre ou un autre métal.In one embodiment, this conductive surface 40 has a surface covered with a layer of metal, for example copper or another metal.

Cette surface conductrice 40 présente une dimension significative par rapport à la dimension du relais électromécanique 2' et doit être disposée à une distance suffisamment proche du relais électromécanique 2' de sorte que lorsque le contact 20' du relais électromécanique 2' bascule entre une position fermée et une position ouverte et vice-versa, une impulsion électrique est générée sur la surface conductrice C'.This conductive surface 40 has a significant dimension with respect to the dimension of the electromechanical relay 2 'and must be arranged at a sufficiently close distance from the electromechanical relay 2' so that when the contact 20 'of the electromechanical relay 2' toggles between a closed position and an open position and vice versa, an electrical pulse is generated on the conductive surface C '.

Ainsi, un signal de détection VD' est généré sur la surface conductrice lorsque le contact 20' passe d'une position ouverte à une position fermée ou vice-versa.Thus, a detection signal V D 'is generated on the conductive surface when the contact 20' moves from an open position to a closed position or vice versa.

Dans un mode de réalisation, les moyens de détection C' sont montés sous le relais électromécanique 2', en particulier sous le contact 20' du relais électromécanique 2'.In one embodiment, the detection means C 'are mounted under the electromechanical relay 2', in particular under the contact 20 'of the electromechanical relay 2'.

Ce positionnement du relais électromécanique 2' et des moyens de détection C' permet une bonne détection des perturbations ou d'impulsion électriques produites sur la surface conductrice 40 lorsque le contact 20' du relais électromécanique 2' change de position.This positioning of the electromechanical relay 2 'and detection means C' allows a good detection of the disturbances or electrical impulses produced on the conductive surface 40 when the contact 20 'of the electromechanical relay 2' changes position.

On va décrire ensuite en référence aux figures 5a et 5b, le procédé de commande d'un relais électromécanique.We will then describe with reference to Figures 5a and 5b , the control method of an electromechanical relay.

La figure 5a représente un signal de synchronisation VB, VB', le signal de commande VC, VC' et un signal VS, VS' représentant l'instant auquel il s'est produit un changement d'état du relais électromécanique 2,2'.The figure 5a represents a synchronization signal V B , V B ', the control signal V C , V C ' and a signal V S , V S 'representing the moment when a change of state of the electromechanical relay 2 has occurred , 2 '.

Le relais électromécanique 2, 2' est commandé selon un procédé de commande comportant les étapes suivantes :

  • détection de la position ouverte ou de la position fermée du contact 20, 20' ; et
  • détermination du temps de commutation tcom, ledit temps de commutation tcom correspondant au temps écoulé entre un premier instant t1 dans lequel le relais électromécanique 2, 2' est commandé en ouverture ou fermeture et un second instant t2 dans lequel la position ouverte ou la position fermée du contact 20, 20' est détectée.
The electromechanical relay 2, 2 'is controlled according to a control method comprising the following steps:
  • detecting the open position or the closed position of the contact 20, 20 '; and
  • determining the switching time t com , said switching time t com corresponding to the time elapsed between a first instant t 1 in which the electromechanical relay 2, 2 'is controlled on opening or closing and a second instant t 2 in which the open position or the closed position of the contact 20, 20 'is detected.

La détection de la position ouverte comporte la génération du signal de détection VD, VD', le signal VS, VS' étant généré en fonction du signal de détection VD, VD,'.Detection of the open position comprises generating the detection signal V D , V D ', the signal V S , V S ' being generated as a function of the detection signal V D , V D , '.

La commande du relais électromécanique 2, 2' en ouverture ou en fermeture, représentée par le signal de commande VC, VC' est mise en oeuvre à un premier instant t1, le contact 20, 20' basculant dans la position ouverte ou dans la position fermée à un deuxième instant t2.The control of the electromechanical relay 2, 2 'in opening or closing, represented by the control signal V C , V C ' is implemented at a first instant t 1 , the contact 20, 20 'tilting in the open position or in the closed position at a second instant t 2 .

Ainsi, le premier instant t1 correspond à l'instant auquel le signal de commande VC, VC' change d'état logique. Dans cet exemple, la commande en ouverture ou en fermeture du relais électromécanique est mise en oeuvre au front montant du signal de commande VC, VC'.Thus, the first instant t 1 corresponds to the instant at which the control signal V C , V C 'changes its logic state. In this example, the opening or closing control of the electromechanical relay is implemented at the rising edge of the control signal V C , V C '.

Le second instant t2 correspond à l'instant auquel le signal VS, VS' indiquent qu'un changement d'état du relais électromécanique 2, 2' s'est produit.The second instant t 2 corresponds to the instant at which the signal V S , V S 'indicate that a change of state of the electromechanical relay 2, 2' has occurred.

Les moyens de détermination 5 détectent ainsi le temps de commutation tcom comme le temps écoulé entre le premier instant t1 et le deuxième instant t2.The determining means 5 thus detect the switching time t com as the time elapsed between the first instant t 1 and the second instant t 2 .

Dans un mode de réalisation, ce type de mesure est mis oeuvre avant la première utilisation du dispositif de commande 1, 1'.In one embodiment, this type of measurement is implemented before the first use of the control device 1, 1 '.

Par exemple, lorsque le dispositif de commande 1, 1' est utilisé dans un appareil électroménager, cette mesure du temps de commutation tcom peut être réalisée chez les fabricants, avant la commercialisation de l'appareil électroménager.For example, when the control device 1, 1 'is used in a household appliance, this measurement of the switching time t com can be carried out at the manufacturers, before the marketing of the appliance.

Dans un autre mode de réalisation, la mesure du temps de commutation tcom est mise en oeuvre à chaque commutation du relais électromécanique 2, 2'.In another embodiment, the measurement of the switching time t com is carried out at each switching of the electromechanical relay 2, 2 '.

Ce dernier mode de réalisation a l'avantage de tenir en compte l'usure du relais électromécanique 2, 2', cette usure pouvant modifier dans le temps le temps de commutation tcom.This last embodiment has the advantage of taking into account the wear of the electromechanical relay 2, 2 ', this wear can change over time the switching time t com .

Ainsi, la commande en ouverture ou en fermeture du relais électromécanique 2, 2' peut être adaptée en fonction de l'évolution du temps de commutation du relais électromécanique 2, 2' dans le temps.Thus, the control opening or closing of the electromechanical relay 2, 2 'can be adapted according to the evolution of the switching time of the electromechanical relay 2, 2' in time.

Selon un mode de réalisation (comme par exemple celui représenté à la figure 1), le signal de détection VD est généré de sorte que des paramètres dudit signal de détection VD sont différents en fonction de la position ouverte ou de la position fermée du contact 20.According to one embodiment (as for example that represented in figure 1 ), the detection signal V D is generated so that parameters of said detection signal V D are different depending on the open position or the closed position of the contact 20.

Dans ce mode de réalisation, lorsque le signal de détection VD présente un niveau sensiblement égal à une première tension prédéterminée ou est un signal électrique oscillant à une fréquence prédéterminée entre la première tension prédéterminée et une seconde tension prédéterminée, le relais électromécanique 2 est en positon ouverte, et lorsque le signal de détection VD présente un niveau sensiblement égal à la seconde tension prédéterminée, le relais électromécanique 2 est en position fermée.In this embodiment, when the detection signal V D has a level substantially equal to a first predetermined voltage or is an electrical signal oscillating at a predetermined frequency between the first predetermined voltage and a second predetermined voltage, the electromechanical relay 2 is in effect. open position, and when the detection signal V D has a level substantially equal to the second predetermined voltage, the electromechanical relay 2 is in the closed position.

L'unité de traitement 4 en fonction du niveau du signal de détection VD déduit la position ouverte ou fermée du relais électromécanique 2.The processing unit 4 as a function of the level of the detection signal V D deduces the open or closed position of the electromechanical relay 2.

Selon un autre mode de réalisation (comme par exemple celui représenté par la figure 3), une impulsion électrique est générée dans le signal de détection VD'.According to another embodiment (as for example that represented by the figure 3 ), an electric pulse is generated in the detection signal V D '.

L'unité de traitement 4' en présence d'une impulsion électrique déduit qu'un changement d'état s'est produit dans le relais électromécanique 2' (le changement d'état est représenté par le signal VS').The processing unit 4 'in the presence of an electrical pulse deduces that a change of state has occurred in the electromechanical relay 2' (the change of state is represented by the signal V S ').

On notera que l'unité de traitement 4' connait si le relais électromécanique est passé en position ouverte ou fermée, la commande en ouverture ou fermeture ayant été mise en oeuvre par l'unité de traitement 4'.It will be noted that the processing unit 4 'knows whether the electromechanical relay has switched to the open or closed position, the command being opened or closed having been implemented by the processing unit 4'.

Ainsi, lorsque l'impulsion électrique est détecté par l'unité de traitement 4', l'instant auquel le contact 20' est positionné en position ouverte ou fermée ,en fonction de la commande provenant de l'unité de traitement 4', est déterminé, et les moyens de détermination du temps de commutation déterminent le temps de commutation tcom.Thus, when the electrical pulse is detected by the processing unit 4 ', the instant at which the contact 20' is positioned in the open or closed position, depending on the command from the processing unit 4 ', is determined, and the means for determining the switching time determine the switching time t com .

La figure 5b représente la commande en ouverture ou en fermeture du relais électromécanique 2, 2' dans un cas de fonctionnement normal.The figure 5b represents the control opening or closing of the electromechanical relay 2, 2 'in a case of normal operation.

En particulier, la figure 5b représente la manière dont la commande en ouverture ou en fermeture représentée par le signal de commande VC, VC' est retardée d'un temps td par rapport à un front montant du signal de synchronisation VB, VB' de sorte que le contact 20, 20' se place en position ouverte ou en position fermée lorsque le signal de synchronisation VB, VB' est sensiblement égal à 0.In particular, figure 5b represents the manner in which the opening or closing command represented by the control signal V C , V C 'is delayed by a time t d with respect to a rising edge of the signal of synchronization V B , V B 'so that the contact 20, 20' is placed in the open position or in the closed position when the synchronization signal V B , V B 'is substantially equal to 0.

On notera que dans cet exemple, la somme du temps de retard td et du temps de commutation tcom est égale à trois fois la demi-période du signal alternatif VA, VA' ou du signal de synchronisation VB, VB'.Note that in this example, the sum of the delay time t d and the switching time t com is equal to three times the half-period of the alternating signal V A , V A 'or of the synchronization signal V B , V B .

Ainsi, l'unité de traitement 4, 4' prend en compte le temps de commutation tcom du relais électromécanique 2, 2' pour générer le signal de commande VC, VC' à un premier instant de temps t1' de sorte que le contact 20, 20' se place en position ouverte ou en position fermée lorsque le signal alternatif VA, VA' est sensiblement égal à zéro, c'est-à-dire un second instant de temps t2'.Thus, the processing unit 4, 4 'takes into account the switching time t com of the electromechanical relay 2, 2' to generate the control signal V C , V C 'at a first instant of time t 1 ' so that the contact 20, 20 'is placed in the open position or in the closed position when the alternating signal V A , V A ' is substantially equal to zero, that is to say a second instant of time t 2 '.

Le contact 20, 20' changeant de position lorsque le signal alternatif VA, VA' est sensiblement égal à zéro, des arcs électriques sont évités, rallongeant ainsi la durée de vie du relais électromécanique 2, 2'.The contact 20, 20 'changing position when the alternating signal V A , V A ' is substantially zero, electric arcs are avoided, thereby extending the life of the electromechanical relay 2, 2 '.

Le temps de commutation tcom est par conséquent déterminé afin d'en prendre compte lors de la commande en fermeture ou en ouverture du relais électromécanique 2, 2' dans un instant de temps précis de façon à éviter tant que possible les arcs électriques.The switching time t com is therefore determined in order to take it into account when closing or opening the electromechanical relay 2, 2 'in a precise instant of time so as to avoid arcing as much as possible.

Claims (8)

  1. Device for controlling an electromechanical relay (1; 1'), the electromechanical relay (2; 2') being arranged between a load (3; 3') and an alternating signal (VA, VA') and comprising a contact (20; 20') movable between an open position in which the alternating signal (VA, VA') is not applied to the load (3; 3') and a closed position in which the alternating signal (VA, VA') is applied to the load (3; 3'), the control device comprising means for controlling the electromechanical relay (2; 2') configured to control the opening or closing of the electromechanical relay taking into account a switching time (tcom), so that the contact (20; 20') is in the open position or closed position when the alternating signal (VA, VA') is substantially equal to zero, the control device (1; 1') being characterized in that it comprises:
    - means for detecting (C; C') the open position or closed position of the contact (20; 20'), said detection means (C') comprise a conducting surface (40) and are configured to generate said detection signal (VD') on said conducting surface (40) when the contact (20') changes from said open position to said closed position or vice versa; and
    - means for determining (5, 5') said switching time (tcom), said switching time (tcom) corresponding to the time elapsed between a first time (t1) at which the opening or closing of the electromechanical relay (2; 2') is commanded and a second time (t2) at which the open position or closed position of the contact (20; 20') is detected respectively by the detection means (C; C').
  2. Device for controlling an electromechanical relay in accordance with claim 1, characterized in that the detection means (C') are arranged near the electromechanical relay (2').
  3. Device for controlling an electromechanical relay in accordance with any one of claims 1 or 2, characterized in that the conducting surface (40) comprises a surface covered with a metal layer.
  4. Device for controlling an electromechanical relay in accordance with any one of claims 1 to 3, characterized in that said detection means (C') are mounted on an electronic board (30').
  5. Device for controlling an electromechanical relay in accordance with claim 4, characterized in that said electromechanical relay (2') is mounted on said electronic board (30'), said detection means (C') being mounted under the contact (20') of the electromechanical relay (2').
  6. Method for controlling an electromechanical relay, the electromechanical relay (2; 2') being arranged between a load (3; 3') and an alternating signal (VA, VA') and comprising a contact (20; 20 ') movable between an open position in which the alternating signal (VA, VA') is not applied to the load (3; 3') and a closed position in which the alternating signal (VA, VA') is applied to the load (3; 3'), the control method comprising a stage for controlling the opening or closing of the electromechanical relay (2; 2') taking into account a switching time, so that the contact (20; 20') is in the open position or closed position when the alternating signal (VA, VA') is substantially equal to zero, the method being characterized in that it also comprises the following stages:
    - detection of the open position or closed position of the contact (20; 20'), the detection of the open position or closed position comprises the generation of a detection signal (VD,VD'), said detection signal (VD') is generated on a conducting surface (40) forming the detection means (C'); and
    - determination of the switching time (tcom), said switching time (tcom) corresponding to the time elapsed between a first time (t1) at which the opening or closing of the electromechanical relay (2; 2') is commanded and a second time (t2) at which the open position or closed position of the contact (20; 20') is detected.
  7. Method for controlling an electromechanical relay in accordance with claim 6, characterized in that the detection stage is implemented when said load (3; 3') is disconnected from said alternating signal (VA, VA').
  8. Domestic appliance comprising at least one load (3; 3') and an electromechanical relay (2; 2') arranged between said load and an alternating signal (VA, VA') and comprising a contact (20; 20') movable between an open position in which the alternating signal (VA, VA') is not applied to the load (3; 3') and a closed position in which the alternating signal (VA, VA') is applied to the load (3; 3'), characterized in that it comprises a device for controlling (1; 1') an electromechanical relay (2; 2') in accordance with any one of claims 1 to 5.
EP15201661.4A 2014-12-31 2015-12-21 Device and method for controlling an electromechanical relay Active EP3041010B1 (en)

Applications Claiming Priority (1)

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FR1463491A FR3031232B1 (en) 2014-12-31 2014-12-31 DEVICE AND METHOD FOR CONTROLLING AN ELECTROMECHANICAL RELAY

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EP3041010A1 EP3041010A1 (en) 2016-07-06
EP3041010B1 true EP3041010B1 (en) 2017-11-15

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EP15201661.4A Active EP3041010B1 (en) 2014-12-31 2015-12-21 Device and method for controlling an electromechanical relay

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EP (1) EP3041010B1 (en)
ES (1) ES2655666T3 (en)
FR (1) FR3031232B1 (en)
MA (1) MA40039A (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5267120A (en) * 1987-05-04 1993-11-30 Digital Appliance Controls, Inc. Relay control apparatus
US5008516A (en) * 1988-08-04 1991-04-16 Whirlpool Corporation Relay control method and apparatus for a domestic appliance
NO167424C (en) * 1989-03-06 1991-10-30 Sinvent As PROCEDURE AND DEVICE FOR CONNECTION RESP. DISCONNECTING A LOAD CIRCUIT IN AN ELECTRIC AC POWER NETWORK.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
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FR3031232B1 (en) 2018-02-09
FR3031232A1 (en) 2016-07-01
ES2655666T3 (en) 2018-02-21
MA40039A (en) 2017-11-14
EP3041010A1 (en) 2016-07-06

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