EP3041010B1 - Vorrichtung und verfahren zur steuerung eines elektromechanischen relais - Google Patents

Vorrichtung und verfahren zur steuerung eines elektromechanischen relais 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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EP15201661.4A
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English (en)
French (fr)
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EP3041010A1 (de
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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    • 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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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Relay Circuits (AREA)
  • Control Or Security For Electrophotography (AREA)

Claims (8)

  1. Vorrichtung (1; 1') zum Steuern eines elektromechanischen Relais, wobei das elektromechanische Relais (2; 2') zwischen einer Last (3; 3') und einem Wechselsignal (VA, VA') angeordnet ist und ein Kontaktstück (20; 20') aufweist, das zwischen einer Offenstellung, in welcher das Wechselsignal (VA, VA') nicht an die Last (3; 3') angelegt ist, und einer Schließstellung beweglich ist, in welcher das Wechselsignal (VA, VA') an die Last (3; 3') angelegt ist, wobei die Steuervorrichtung Steuermittel zum Steuern des elektromechanischen Relais (2; 2') aufweist, die dazu ausgelegt sind, das Öffnen bzw. Schließen des elektromechanischen Relais unter Berücksichtigung einer Schaltzeit (tcom) zu steuern, so dass das Kontaktstück (20; 20') in die Offenstellung bzw. in die Schließstellung gelangt, wenn das Wechselsignal (VA, VA') im Wesentlichen gleich null ist, wobei die Steuervorrichtung (1; 1') dadurch gekennzeichnet ist, dass sie enthält:
    - Erfassungsmittel (C; C') zum Erfassen der Offenstellung bzw. der Schließstellung des Kontaktstücks (20; 20'), wobei die Erfassungsmittel (C') eine leitfähige Fläche (40) aufweisen und dazu ausgelegt sind, das Erfassungssignal (VD') an der leitfähigen Fläche (40) zu erzeugen, wenn das Kontaktstück (20') von der Offenstellung in die Schließstellung bzw. umgekehrt übergeht; und
    - Bestimmungsmittel (5, 5') zum Bestimmen der Schaltzeit (tcom), wobei die Schaltzeit (tcom) der Zeit entspricht, die zwischen einem ersten Zeitpunkt (t1), an dem das elektromechanische Relais (2; 2') auf- bzw. zugesteuert wird, und einem zweiten Zeitpunkt (t2) abläuft, an dem die Offenstellung bzw. Schließstellung des Kontaktstücks (20; 20') jeweils über die Erfassungsmittel (C; C') erfasst wird.
  2. Vorrichtung zum Steuern eines elektromechanischen Relais nach Anspruch 1, dadurch gekennzeichnet, dass die Erfassungsmittel (C') in der Nähe des elektromechanischen Relais (2') angeordnet sind.
  3. Vorrichtung zum Steuern eines elektromechanischen Relais nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die leitfähige Fläche (40) eine mit einer Metallschicht überdeckte Oberfläche aufweist.
  4. Vorrichtung zum Steuern eines elektromechanischen Relais nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Erfassungsmittel (C') an eine elektronische Karte (30') angebracht sind.
  5. Vorrichtung zum Steuern eines elektromechanischen Relais nach Anspruch 4, dadurch gekennzeichnet, dass das elektromechanische Relais (2') an die elektronische Karte (30') angebracht ist, wobei die Erfassungsmittel (C') unter das Kontaktstück (20') des elektromechanischen Relais (2') angebracht sind.
  6. Verfahren zum Steuern eines elektromagnetischen Relais, wobei das elektromechanische Relais (2; 2') zwischen einer Last (3; 3') und einem Wechselsignal (VA, VA') angeordnet ist und ein Kontaktstück (20; 20') aufweist, das zwischen einer Offenstellung, in welcher das Wechselsignal (VA, VA') nicht an die Last (3; 3') angelegt ist, und einer Schließstellung beweglich ist, in welcher das Wechselsignal (VA, VA') an die Last (3; 3') angelegt ist, wobei das Steuerverfahren einen Schritt des Auf- bzw. Zusteuerns des elektromechanischen Relais (2; 2') unter Berücksichtigung einer Schaltzeit umfasst, so dass das Kontaktstück (20; 20') in die Offenstellung bzw. in die Schließstellung gelangt, wenn das Wechselsignal (VA, VA') im Wesentlichen gleich null ist, wobei das Verfahren dadurch gekennzeichnet ist, dass es ferner nachfolgende Schritte umfasst:
    - Erfassen der Offenstellung bzw. der Schließstellung des Kontaktstücks (20; 20'), wobei das Erfassen der Offenstellung bzw. der Schließstellung das Erzeugen eines Erfassungssignals (VD, VD') umfasst, wobei das Erfassungssignal (VD') an einer leitfähigen Fläche (40) erzeugt wird, welche Erfassungsmittel (C') bildet; und
    - Bestimmen der Schaltzeit (tcom), wobei die Schaltzeit (tcom) der Zeit entspricht, die zwischen einem ersten Zeitpunkt (t1), an dem das elektromechanische Relais (2; 2') auf- bzw. zugesteuert wird, und einem zweiten Zeitpunkt (t2) abläuft, an dem die Offenstellung bzw. Schließstellung des Kontaktstücks (20; 20') erfasst wird.
  7. Verfahren zum Steuern eines elektromechanischen Relais nach Anspruch 6, dadurch gekennzeichnet, dass der Schritt des Erfassens dann erfolgt, wenn die Last (3; 3') vom Wechselsignal (VA, VA') getrennt ist.
  8. Elektrohaushaltsgerät mit zumindest einer Last (3; 3') und einem elektromechanischen Relais (2; 2'), das zwischen der Last (3; 3') und einem Wechselsignal (VA, VA') angeordnet ist und ein Kontaktstück (20; 20') aufweist, das zwischen einer Offenstellung, in welcher das Wechselsignal (VA, VA') nicht an die Last (3; 3') angelegt ist, und einer Schließstellung beweglich ist, in welcher das Wechselsignal (VA, VA') an die Last (3; 3') angelegt ist, wobei es eine Steuervorrichtung (1; 1') zum Steuern eines elektromechanischen Relais (2; 2') nach einem der Ansprüche 1 bis 5 enthält.
EP15201661.4A 2014-12-31 2015-12-21 Vorrichtung und verfahren zur steuerung eines elektromechanischen relais Active EP3041010B1 (de)

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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 (no) * 1989-03-06 1991-10-30 Sinvent As Fremgangsmaate og anordning for innkobling resp. utkoblingav en lastkrets i et elektrisk vekselstroemnett.

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MA40039A (fr) 2017-11-14

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