EP2017870B1 - Commutation souple basée sur un système micro-électromécanique - Google Patents

Commutation souple basée sur un système micro-électromécanique Download PDF

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Publication number
EP2017870B1
EP2017870B1 EP20070110554 EP07110554A EP2017870B1 EP 2017870 B1 EP2017870 B1 EP 2017870B1 EP 20070110554 EP20070110554 EP 20070110554 EP 07110554 A EP07110554 A EP 07110554A EP 2017870 B1 EP2017870 B1 EP 2017870B1
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European Patent Office
Prior art keywords
switch
circuitry
switching
load
alternating
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Application number
EP20070110554
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German (de)
English (en)
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EP2017870A2 (fr
EP2017870A3 (fr
Inventor
William James Premerlani
Kanakasabapathi Subramanian
Christopher Keimel
John N. Park
Ajit Achuthan
Wang Wensen
Joshua Isaac Wright
Kristina Margaret Korosi
Somashekhar Basavaraj
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General Electric Co
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General Electric Co
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Publication of EP2017870A3 publication Critical patent/EP2017870A3/fr
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H59/00—Electrostatic relays; Electro-adhesion relays
    • H01H59/0009—Electrostatic relays; Electro-adhesion relays making use of micromechanics
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H2071/008—Protective switches or relays using micromechanics
    • 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
    • H01H9/541—Contacts shunted by semiconductor devices

Definitions

  • the invention relates generally to switching devices and more particularly to micro-electromechanical system based switching devices.
  • electromechanical contactors are employed in control gear, where the electromechanical contactors are capable of handling switching currents up to their interrupting capacity. Electromechanical contactors may also find application in power systems for switching currents. However, fault currents in power systems are typically greater than the interrupting capacity of the electromechanical contactors. Accordingly, to employ electromechanical contactors in power system applications, it may be desirable to protect the contactor from damage by backing it up with a series device that is sufficiently fast acting to interrupt fault currents prior to the contactor opening at all values of current above the interrupting capacity of the contactor.
  • Previously conceived solutions to facilitate use of contactors in power systems include vacuum contactors, vacuum interrupters and air break contactors, for example.
  • contactors such as vacuum contactors do not lend themselves to easy visual inspection as the contactor tips are encapsulated in a sealed, evacuated enclosure.
  • the vacuum contactors are well suited for handling the switching of large motors, transformers and capacitors, they are known to cause damaging transient overvoltages, particularly when the load is switched off.
  • US 2006/0202933 discloses a microelectromechanical switch including a first mechanism for selectively applying an electrostatic force between a first flexible surface and a second flexible surface.
  • electromechanical contactors generally use mechanical switches.
  • mechanical switches tend to switch at a relatively slow speed
  • predictive techniques are required in order to estimate occurrence of a zero crossing, often tens of milliseconds before the switching event is to occur.
  • Such zero crossing prediction is prone to error as many transients may occur in this time.
  • the present invention provides a system as defined in claim 1 and a method as defined in claim 9.
  • FIG. 1 illustrates a block diagram of an exemplary soft switching system 10, in accordance with various aspects of the present invention.
  • the soft switching system 10 includes switching circuitry 12, detection circuitry 14, and control circuitry 16 operatively coupled together.
  • the detection circuitry 14 may be coupled to the switching circuitry 12 and configured to detect an occurrence of a zero crossing of an alternating source voltage in a load circuit (hereinafter "source voltage") or an alternating current in the load circuit (hereinafter referred to as "load circuit current").
  • the control circuitry 16 may be coupled to the switching circuitry 12 and the detection circuitry 14, and may be configured to facilitate arc-less switching of one or more switches in the switching circuitry 12 responsive to a detected zero crossing of the alternating source voltage or the alternating load circuit current.
  • the control circuitry 16 may be configured to facilitate arc-less switching of one or more MEMS switches comprising at least part of the switching circuitry 12.
  • the soft switching system 10 may be configured to perform soft or point-on-wave switching whereby one or more MEMS switches in the switching circuitry 12 may be closed at a time when the voltage across the switching circuitry 12 is at or very close to zero, and opened at a time when the current through the switching circuitry 12 is at or close to zero.
  • By closing the switches at a time when the voltage across the switching circuitry 12 is at or very close to zero pre-strike arcing can be avoided by keeping the electric field low between the contacts of the one or more MEMS switches as they close, even if multiple switches do not all close at the same time.
  • the soft switching system 10 can be designed so that the current in the last switch to open in the switching circuitry 12 falls within the design capability of the switch.
  • the control circuitry 16 may be configured to synchronize the opening and closing of the one or more MEMS switches of the switching circuitry 12 with the occurrence of a zero crossing of an alternating source voltage or an alternating load circuit current.
  • FIG. 2 a schematic diagram 18 of one embodiment of the soft switching system 10 of FIG. 1 is illustrated.
  • the schematic diagram 18 includes one example of the switching circuitry 12, the detection circuitry 14 and the control circuitry 16.
  • the switching circuitry 12 may nonetheless include multiple MEMS switches depending upon e.g., the current and voltage handling requirements of the soft switching system 10.
  • the switching circuitry 12 may include a switch module including multiple MEMS switches coupled together in a parallel configuration to divide the current amongst the MEMS switches.
  • the switching circuitry 12 may include an array of MEMS switches coupled in a series configuration to divide the voltage amongst the MEMS switches.
  • the switching circuitry 12 may include an array of MEMS switch modules coupled together in a series configuration to concurrently divide the voltage amongst the MEMS switch modules and divide the current amongst the MEMS switches in each module.
  • the one or more MEMS switches of the switching circuitry 12 may be integrated into a single package 28.
  • the exemplary MEMS switch 20 may include three contacts.
  • a first contact may be configured as a drain 22, a second contact may be configured as a source 24, and the third contact may be configured as a gate 26.
  • the control circuitry 16 is coupled to the gate contact 26 to facilitate switching a current state of the MEMS switch 20.
  • damping circuitry 29 may be coupled in parallel with the MEMS switch 20 to delay appearance of voltage across the MEMS switch 20.
  • the damping circuitry 29 may include a snubber capacitor 30 coupled in series with a snubber resistor 32, for example.
  • the MEMS switch 20 may be coupled in series with a load circuit 34 as further illustrated in FIG. 2 .
  • the load circuit 34 may include a voltage source V SOURCE 36, and may possess a representative load inductance L LOAD 38 and a load resistance R LOAD 40.
  • the voltage source V SOURCE 36 (also referred to as an AC voltage source) may be configured to generate the alternating source voltage and the alternating load current I LOAD 42.
  • the detection circuitry 14 may be configured to detect occurrence of a zero crossing of the alternating source voltage or the alternating load current I LOAD 42 in the load circuit 34.
  • the alternating source voltage is sensed via the voltage sensing circuitry 46 and the alternating load current I LOAD 42 is sensed via the current sensing circuitry 48.
  • the alternating source voltage and the alternating load current may be sensed continuously or at discrete periods for example.
  • a zero crossing of the source voltage may be detected through e.g., use of a comparator such as the illustrated zero voltage comparator 52.
  • the voltage sensed by the voltage sensing circuitry 46 and a zero voltage reference 54 may be employed as inputs to the zero voltage comparator 52.
  • an output signal 56 representative of a zero crossing of the source voltage of the load circuit 34 may be generated.
  • a zero crossing of the load current I LOAD 42 may also be detected through use of a comparator such as the illustrated zero current comparator 60.
  • the current sensed by the current sensing circuitry 48 and a zero current reference 58 may be employed as inputs to the zero current comparator 60.
  • an output signal 62 representative of a zero crossing of the load current I LOAD 42 may be generated.
  • the control circuitry 16 utilizes the output signals 56 and 62 to determine when to change (e.g., open or close) the current operating state of the MEMS switch 20 (or array of MEMS switches). More specifically, the control circuitry 16 may be configured to facilitate opening of the MEMS switch 20 in an arc-less manner to interrupt or open the load circuit 34 responsive to a detected zero crossing of the alternating load current I LOAD 42. Additionally, the control circuitry 16 may be configured to facilitate closing of the MEMS switch 20 in an arc-less manner to complete the load circuit 34 responsive to a detected zero crossing of the alternating source voltage.
  • the control circuitry 16 determines whether to switch the present operating state of the MEMS switch 20 to a second operating state based at least in part upon a state of an Enable signal 64.
  • the Enable signal 64 may be generated as a result of a power off command in a contactor application, for example.
  • the Enable signal 64 and the output signals 56 and 62 may be used as input signals to a dual D flip-flop 66 as shown. As will be described in further detail with respect to FIGs.
  • these signals may be used to close the MEMS switch 20 at a first source voltage zero after the Enable signal 64 is made active (e.g., rising edge triggered), and to open the MEMS switch 20 at the first load current zero after the Enable signal 64 is deactivated (e.g., falling edge triggered).
  • a trigger signal 72 may be generated every time the Enable signal 64 is active (either high or low depending upon the specific implementation) and either output signal 56 or 62 indicates a sensed voltage or current zero.
  • the trigger signal 72 may be generated via a NOR gate 70, for example.
  • the trigger signal 72 may in turn be passed through a MEMS gate driver 74 to generate a gate activation signal 76 which may be used to apply a control voltage to the gate 26 of the MEMS switch 20 (or gates in the case of a MEMS array).
  • a plurality of MEMS switches may be operatively coupled in parallel (e.g., to form a switch module) in lieu of a single MEMS switch.
  • the combined capabilities of the MEMS switches may be designed to adequately carry the continuous and transient overload current levels that may be experienced by the load circuit. For example, with a 10-amp RMS motor contactor with a 6X transient overload, there should be enough switches coupled in parallel to carry 60 amps RMS for 10 seconds. Using point-on-wave switching to switch the MEMS switches within 5 microseconds of reaching current zero, there will be 160 milliamps instantaneous, flowing at contact opening.
  • each MEMS switch should be capable of "warm-switching" 160 milliamps, and enough of them should be placed in parallel to carry 60 amps.
  • a single MEMS switch should be capable of interrupting the amount of current that will be flowing at the moment of switching.
  • FIG. 3 illustrates a schematic diagram of one embodiment of a MEMS based switch module 92.
  • the switch module 92 may include a plurality of MEMS switches operatively coupled in parallel between leads 98 and 100.
  • the plurality of MEMS switches in the switch module 92 may include one or more load contacts 94.
  • control circuitry 16 may generate one or more signals to cause the plurality of load contacts 94 to initiate opening or closing at substantially the same time. Due to slight variations in design between the load contacts 94, it is quite likely that not all of load contacts will open or close simultaneously.
  • the load contacts 94 may thus be designed to be relatively small and still handle the steady state load current I LOAD 42 (see FIG. 2 ) of the load circuit 34 (see FIG. 2 ), which is also rather small (e.g., on the order of about 50 mA to about 1 Ampere).
  • the last switch in the switch module 92 to open may be called upon to interrupt from about 10 mA to 100 mA depending upon the design of the switch array and the switching controls.
  • the switching contact 102 may be designed to handle a larger current than the load contacts 94. Although the increased current carrying capability of the switching contact 102 may require that the switching contact be larger than the load contacts 94, a fewer number of switching contacts 102 may be used.
  • a non-linear resistor 104 such as a varistor, may be employed to absorb any residual inductive energy from the switch module 92.
  • the non-linear resistor 104 may include a metal oxide varistor (MOV), for example.
  • MOV metal oxide varistor
  • Such a non-linear resistor 104 may be included in the design of the switch module 92 so as to clip the peaks of the recovery voltage and/or absorb any residual inductive energy from the load circuit.
  • the MOV may be selected based on peak voltage, peak current, and energy absorption characteristics.
  • the peak voltage of the load circuit may be set to approximately 1.6 times the peak of the steady-state voltage rating. The 1.6 factor helps control the amount of energy absorbed by the MOV.
  • the current rating may be set to the peak current that is expected to be flowing when the contacts open.
  • the switch module 92 may include a snubber circuit coupled across the non-linear resistor 104.
  • the snubber circuit may include a snubber capacitor C SNUB 106 coupled in series with a snubber resistor R SNUB 108.
  • the snubber capacitor C SNUB 106 may facilitate improvement in transient voltage sharing during the sequencing of the opening of the MEMS switches.
  • the snubber resistor 108 may suppress any pulse of current generated by the snubber capacitor C SNUB 106 during closing operation of the switch module 92.
  • the switch module 92 may include a leakage contact 110 coupled in series with the non-linear resistor 104.
  • the leakage contact 110 may include a MEMS switch. This leakage contact 110 may be configured to reduce steady state leakage current through the switch module 92 by removing the effect of any capacitive and non-linear resistive elements (e.g., such as non-linear resistor 104, C SNUB 106 and R SNUB 108) from the switch module 92.
  • the switch module 92 may also include one or more leakage resistors 112, 114, where the leakage resistors 112, 114 may be configured to provide a conductive path for any leakage current in the switch module 92.
  • FIG. 4 is a schematic diagram illustrating an exemplary MEMS based switch array 116 in accordance with one embodiment.
  • the switch array 116 may include a plurality of switch modules 118 operatively coupled in series. It may be noted that each of the plurality of switch modules 118 may include at least one MEMS switch. In one embodiment, one or more of switch modules 118 may represent the switch module 92 of FIG. 3 .
  • the switch array 116 is shown as including two or more switch modules 118 operatively coupled in series between leads 122 and 124.
  • the number 'M' of modules to be coupled in series may be determined by the peak voltage rating for the soft switching system 10 (see FIG. 1 ).
  • each of the plurality of switch modules 118 may include a respective grading resistor R GRADE 126 coupled across each of the plurality of switch modules 118.
  • the grading resistor(s) R GRADE 126 may provide a conductive path for steady state voltage grading in the face of a very slight leakage current to ground. More specifically, in the switch array 116 leakage currents from MEMS switches to ground may result in a very uneven voltage distribution when all the MEMS switches are open. Steady state voltage sharing may be accomplished via the grading resistor(s) R GRADE 126, which allow a fraction of a microampere to flow through the switch array 116 to force an even voltage distribution in the face of leakage current to ground.
  • the grading resistor(s) R GRADE 126 may be selected based on the line to ground leakage currents expected through the MEMS switches.
  • the switch array 116 may also include capacitors 130, 132 configured to facilitate controlling rate of rise of recovery voltage.
  • the exemplary MEMS based switching system 134 is shown as including a switch array 136, such as the switch array 116 of FIG. 4 .
  • the MEMS based switching system 134 includes an alternating current (AC) voltage source V SOURCE 138, a source inductance L SOURCE 140, and a source resistance R SOURCE 142.
  • AC alternating current
  • the AC voltage source 138, a source inductance L SOURCE 140, and a source resistance R SOURCE 142 may be representative of the Thevenin equivalent circuit of the power source that can arise from e.g., the secondary of a transformer in the delivery of power to the switch array 136.
  • the source inductance L SOURCE 140 may be representative of a combined inductance of buses and cables viewed by the switch array 136.
  • the MEMS based switching system 134 is shown as including a passive load, where the passive load may include a load inductance L LOAD 146 coupled in series with a load resistance R LOAD 148.
  • the MEMS based switching system 134 may also include a source capacitor C SOURCE 144 and a load capacitor C LOAD 150.
  • the source ( C SOURCE 144) and load (C LOAD 150) capacitors may control the rate of rise of the recovery voltage across the switch array 136. Without such source and load capacitors, there is a possibility of arcing in the switch array 136 during interruption of an inductive load current.
  • the source capacitor C SOURCE 144 and load capacitor C LOAD 150 may be coupled from line to ground rather than directly across the switch array 136 to suppress a capacitive leakage current through the switch array 136 when in an open or non-conducting state. Additionally, the source (C SOURCE 144) and load (C LOAD 150) capacitors may facilitate reducing voltage stress on the switch array 136 during load interruption.
  • detection circuitry and control circuitry may be operatively coupled to the switching circuitry, where the detection circuitry may be configured to detect a zero crossing of the AC source voltage or a AC load current, and the control circuitry may be configured to facilitate arc-less switching of the MEMS switches responsive to the detected zero crossing.
  • a current level and/or a source voltage level in a load circuit may be monitored as indicated by block 198.
  • the current level and/or a source voltage level may be monitored via the detection circuitry 14 (see FIG. 1 ), for example.
  • zero crossings of source voltage and the load current may be sensed by the detection circuitry, for example.
  • a trigger signal may be generated responsive to the detected zero crossings as indicated by block 202.
  • the trigger signal may be configured to facilitate switching of a present operating state of the MEMS switch as indicated by block 204.
  • FIG. 7 is a graphical representation 206 of exemplary simulation results representative of a MEMS switch closing at near zero voltage in a MEMS based soft switching system, in accordance with aspects of the present invention. As depicted in FIG. 7 , a variation in amplitude 208 is plotted against a variation in time 210.
  • Response curve 212 represents a variation of amplitude of the Enable signal voltage as a function of time.
  • reference numeral 214 represents region on the response curve 212 where the Enable signal voltage has reached a steady logic high state.
  • a variation of amplitude of the source voltage as a function of time is represented in response curve 216.
  • a variation of amplitude of the load current as a function of time is embodied in response curve 218.
  • Response curve 220 represents a variation of amplitude of the gate voltage as a function of time.
  • a region on the response curve 220 where the gate voltage is transitioned to a logic high state is indicated by reference numeral 222.
  • reference numeral 224 represents a zero crossing of the source voltage.
  • the source voltage and load current are continuously sensed via the detection circuitry. Furthermore, the detection circuitry is employed to detect zero crossings of the source voltage and the load current. This information regarding the detected zero crossings is then employed to set the state of the Enable signal.
  • the Enable voltage 212 is set to a logic high state in response to a detected zero crossing of the source voltage. Furthermore, the voltage of the Enable signal 212 is illustrated as achieving a steady high state at reference point 214.
  • the MEMS switch is closed at a first zero crossing of the source voltage after the Enable signal voltage achieves a steady logic high state.
  • the first zero crossing of the source voltage 216 after the Enable signal 212 achieves a steady logic high state is represented by reference numeral 224.
  • the gate voltage 220 may be pulled high to facilitate switching the MEMS switch to a closed state.
  • the load current starts to flow through the MEMS switch as indicated by response curve 218. Consequently, the MEMS switch is closed in an arc-less manner to complete the load circuit responsive to the detected zero crossing of the AC source voltage.
  • the MEMS switch is closed at a near zero source voltage, thereby suppressing any arc that may be formed between the contacts of the MEMS switch.
  • FIG. 8 is a graphical representation 226 of exemplary simulation results representative of a MEMS switch opening at near zero current in a MEMS based soft switching system, in accordance with various aspects of the present invention. As depicted in FIG. 8 , a variation in amplitude 228 is plotted against a variation in time 230.
  • Response curve 232 represents a variation of amplitude of the Enable voltage as a function of time.
  • reference numeral 234 represents a region on the response curve 232 where the Enable signal has reached a steady logic low state.
  • a variation of amplitude of the source voltage as a function of time is represented in response curve 236.
  • a variation of amplitude of the load current as a function of time is embodied in response curve 238.
  • Response curve 240 represents a variation of amplitude of the gate voltage as a function of time.
  • reference numeral 242 represents a region on the response curve 242 where the gate voltage is transitioned to a logic low state.
  • the voltage of the Enable signal 232 that is currently in a logic high state is set to a logic low state in response to a detected zero crossing of the load current. Furthermore, the voltage of the Enable signal 232 is illustrated as achieving the logic low state at reference point 234.
  • the MEMS switch is opened at a first zero crossing of the load current after the Enable signal achieves a steady logic low state.
  • the first zero crossing of the load current 238 after the Enable signal 232 achieves a steady low state is also represented by reference numeral 234.
  • the gate voltage 240 may be pulled low to facilitate switching the MEMS switch to an open state. Consequently, the source voltage that was previously in a non-conducting state begins to appear across the MEMS switch as indicated by response curve 236. Consequently, the MEMS switch is opened in an arc-less manner to interrupt a load circuit responsive to the detected zero crossing of the AC load current. In other words, the MEMS switch is opened at a near zero load current, thereby suppressing any arc that may be formed between the contacts of the MEMS switch.

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Claims (10)

  1. Système (10) comportant:
    un circuit de charge (34) ;
    des circuits de détection (14) conçus pour détecter la survenance d'un passage par zéro d'une tension alternative de source (36) ou d'un courant alternatif de charge (42), les circuits de détection (14) étant conçus pour recevoir du circuit de charge une tension de circuits de détection de tension (46) ou, de circuits de détection d'intensité (48) du circuit de charge (34), une intensité, et pour produire un signal de sortie (56, 62) représentant un passage par zéro respectivement de la tension alternative de source (36) ou de courant alternatif de charge (42) ;
    des circuits de commutation (12) couplés aux circuits de détection (14) et au circuit de charge (34), les circuits de commutation (12) comprenant un commutateur (20) de système micro-électromécanique ; et
    des circuits de commande (16) couplés aux circuits de détection (14) et aux circuits de commutation (12) et agencés pour ouvrir le commutateur (20) de système micro-électromécanique en réponse à la réception d'un signal de sortie (56, 62) représentant un premier passage par zéro du courant alternatif de charge (42) ou de la tension alternative de source (36) après qu'un signal de validation (64) reçu par les circuits de commande (16) a atteint un régime stable et agencés pour fermer le commutateur (20) de système micro-électromécanique en réponse à la réception d'un signal de sortie (56, 62) représentant un premier passage par zéro du courant alternatif de charge (42) ou de la tension alternative de source (36) après qu'un signal de validation (64) reçu par les circuits de commande (16) a atteint un régime stable.
  2. Système (10) selon la revendication 1, dans lequel les circuits de commande (16) sont conçus pour ouvrir le commutateur (20) de système micro-électromécanique d'une manière sans arc afin d'interrompre un circuit de charge (34) en réponse au passage par zéro détecté du courant alternatif de charge (42).
  3. Système (10) selon la revendication 1 ou la revendication 2, dans lequel les circuits de commande (16) sont conçus pour se fermer d'une manière sans arc afin de fermer un circuit de charge (34) en réponse au passage par zéro détecté de la tension alternative de source (36).
  4. Système (10) selon l'une quelconque des revendications précédentes, comportant en outre un circuit d'amortissement (106, 108) conçu pour retarder l'apparition d'une tension dans le commutateur (20) de système micro-électromécanique.
  5. Système (10) selon l'une quelconque des revendications précédentes, dans lequel les circuits de commutation (12) comprennent en outre un module de commutation (92) couplé aux circuits de commande (16) et aux circuits de détection (14) et comprenant une pluralité de commutateurs (20) de système micro-électromécanique, les circuits de commande (16) étant conçus pour exécuter une commutation sans arc d'au moins un commutateur parmi la pluralité de commutateurs (20) de système micro-électromécanique en réponse à un passage par zéro détecté d'une tension alternative de source (36) ou d'un courant alternatif de charge (42).
  6. Système (10) selon l'une quelconque des revendications précédentes, dans lequel les circuits de commutation (12) comprennent en outre une pluralité de modules de commutation (92) couplés à un circuit série.
  7. Système selon la revendication 6, dans lequel au moins un des différents modules de commutation (92) comprend:
    un contact de charge ; et
    un contact de commutation.
  8. Système (10) selon la revendication 6 ou la revendication 7, comportant en outre une résistance d'échelonnement (126) montée en parallèle avec le/les modules de commutation (118).
  9. Procédé (196) pour faire fonctionner le système selon la revendication 1, comportant les étapes de :
    contrôle (198) d'une tension alternative de source (36) ou d'un courant alternatif de charge (42) dans un circuit de charge (34) couplé à des circuits de commutation (12) comprenant un groupe de commutateurs (116, 136), les circuits de commutation comprenant une pluralité de modules de commutation (118) montés en série, et les circuits de commutation comprennent un commutateur (20) de système micro-électromécanique ;
    détection (200) d'une première survenance de passage par zéro du courant alternatif de charge (42) ou de la tension alternative de source (36) après la réception préalable d'un signal de validation ;
    production (202) d'un signal d'activation (72) en réponse audit premier passage par zéro détecté, le signal d'activation (72) étant conçu pour commuter un état instantané de fonctionnement du commutateur (20) de système micro-électromécanique; et
    commutation (204) d'un état instantané de chacun des différents modules de commutation (118) en réponse au signal d'activation (72).
  10. Procédé (196) selon la revendication 9, dans lequel la commutation de l'état instantané comprend :
    l'activation d'un contact de charge (94) et d'au moins un contact de commutation (102) de telle sorte que le contact de charge (94) soit activé avant le/les contact(s) de commutation ; l'ouverture du contact de charge (94) et du/des contact(s) de commutation (102) d'une manière sans arc afin d'interrompre un courant non nul dans les circuits de commutation de telle sorte (12) que le contact de charge (94) s'ouvre avant le/les contact(s) de commutation (102) et
    fermeture du contact de charge (94) et du/des contact(s) de commutation (102) d'une manière sans arc afin de fermer le circuit de commutation (12) pendant qu'une tension non nulle apparaît dans le commutateur.
EP20070110554 2007-06-19 2007-06-19 Commutation souple basée sur un système micro-électromécanique Active EP2017870B1 (fr)

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EP2017870A2 EP2017870A2 (fr) 2009-01-21
EP2017870A3 EP2017870A3 (fr) 2009-08-05
EP2017870B1 true EP2017870B1 (fr) 2013-05-15

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DE102017127766B3 (de) 2017-11-24 2018-10-18 Beckhoff Automation Gmbh Busklemme für ein automatisierungssystem und verfahren zum überwachen eines versorgungsstromnetzes

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JP3861871B2 (ja) * 2003-11-26 2006-12-27 サンケン電気株式会社 スイッチング電源装置
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017127766B3 (de) 2017-11-24 2018-10-18 Beckhoff Automation Gmbh Busklemme für ein automatisierungssystem und verfahren zum überwachen eines versorgungsstromnetzes
WO2019101433A1 (fr) 2017-11-24 2019-05-31 Beckhoff Automation Gmbh Borne de bus pour système d'automatisation et procédé destiné à contrôler un réseau électrique d'alimentation
US11187733B2 (en) 2017-11-24 2021-11-30 Beckhoff Automation Gmbh Bus terminal for automation system and method for monitoring a current-supply network

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