EP0294794B1 - Procédé pour ouvrir les contacts soudés d'un relais ainsi que circuit pour son exécution - Google Patents

Procédé pour ouvrir les contacts soudés d'un relais ainsi que circuit pour son exécution Download PDF

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Publication number
EP0294794B1
EP0294794B1 EP88109154A EP88109154A EP0294794B1 EP 0294794 B1 EP0294794 B1 EP 0294794B1 EP 88109154 A EP88109154 A EP 88109154A EP 88109154 A EP88109154 A EP 88109154A EP 0294794 B1 EP0294794 B1 EP 0294794B1
Authority
EP
European Patent Office
Prior art keywords
relay
circuit
contacts
signal
voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88109154A
Other languages
German (de)
English (en)
Other versions
EP0294794A3 (en
EP0294794A2 (fr
Inventor
Norbert Nickolai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0294794A2 publication Critical patent/EP0294794A2/fr
Publication of EP0294794A3 publication Critical patent/EP0294794A3/de
Application granted granted Critical
Publication of EP0294794B1 publication Critical patent/EP0294794B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/001—Means for preventing or breaking contact-welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/002—Monitoring or fail-safe circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/002—Monitoring or fail-safe circuits
    • H01H2047/003—Detecting welded contacts and applying weld break pulses to coil

Definitions

  • the invention relates to a circuit arrangement for releasing the contacts of an adhesive relay according to the preamble of claim 1 and is based on FR-A-2'565 '430.
  • a relay is also already known in which, to reduce the risk of welding, at least one of the two contacts is exposed to vibrations, in particular during the time the contact is made.
  • the parts exposed to vibrations are matched in their mass and possibly the data of their elastic fastening so that they are in resonance or almost in resonance with the mains frequency or a harmonic of the mains frequency.
  • FR-A-25 65 430 a circuit arrangement for detecting a relay fault is known, in which the load signal to be switched by the relay and the control signal of the relay are fed to an error detection circuit.
  • An AC voltage or a pulsating DC voltage with a frequency corresponding to the natural frequency of the mechanical relay structure is preferably applied to the winding of the relay coil. This causes the relay structure to vibrate naturally.
  • a time circuit is preferably provided between the output of the comparison circuit and the control input of the switching device, which output signal of the comparison circuit indicating a sticking together of the relay contacts only for a specific, predetermined period of time switches through to the control input of the switching device, so that the AC voltage or the pulsating DC voltage is advantageously only applied to the winding of the relay coil for a specific, predetermined period of time.
  • the circuit arrangement according to the invention has a comparison circuit 10, which is driven at its one input 12 by the control signal of the relay 14 shown in dashed lines in the figure and is connected with its other input 16 to the load circuit 18 to be switched by the relay 14.
  • sticking together of the relay contacts 20 and 22 is determined by comparing the profile of the load signal to be switched by the relay 14 with the profile of the control signal of the relay 14. If the load signal to be switched by the relay 14 does not follow the control signal of the relay, taking into account the switching time of the relay 14, this means that the two relay contacts 20 and 22 are glued together.
  • the output 24 of the comparison circuit 10 is connected to the input 26 of a time circuit 28.
  • the timer 28 is intended to prevent the relay armature 34 from shaking continuously if the connection layer between the relay contacts 20 and 22 does not break even when the relay armature 34 is shaken several times.
  • the switching device 32 when the relay 14 is functioning, switches the control signal of the relay 14, which is present at its one input 36, to the control input 38 of the relay driver 40, it connects the output 42 of an AC voltage generator 44 in the event that the relay contacts 20 and 22 are glued together with the control input 38 of the relay driver 40.
  • the alternating voltage generated by the alternating voltage generator 44 causes the relay driver 40 to be switched alternately conductive and blocking.
  • one of the output voltage of the AC voltage generator is applied to the winding of the relay coil 46 44 corresponding AC voltage applied.
  • the relay coil generates an alternating magnetic field, which exerts a shaking force on the relay armature 34.
  • the relay armature 34 is preferably excited with the natural frequency of the mechanical structure of the relay 14 in order to set the relay in natural oscillations.

Landscapes

  • Relay Circuits (AREA)

Claims (3)

  1. Circuit pour séparer les contacts (20, 22) d'un relais (14) qui colle, dont l'un des contacts, le contact (20) est à poste fixe et dont l'autre contact (22) est disposé sur l'armature ferromagnétique du relais (34), armature qui est attirée par son contact (22), quand on applique une tension électrique à l'enroulement de la bobine du relais (46), vers le contact à poste fixe (20) et qui retombe de nouveau quand il n'y a pas de courant qui passe dans la bobine du relais (46) quand le relais (14) est intact , grâce à quoi les deux contacts (20, 22) se séparent à nouveau l'un de l'autre, circuit dans lequel un collage des contacts du relais (20,22) est déterminé par un circuit de comparaison amorcé à l'une de ses entrées (12) par le signal d'amorçage du relais (14) et raccordé par son autre entrée (16) au circuit de charge (18) à brancher par le relais (14), circuit de comparaison au moyen duquel on compare le déroulement du signal de charge à brancher par le relais (14) au déroulement du signal d'amorçage du relais (14), circuit caractérisé en ce que le signal de sortie du circuit de comparaison (10) commande un circuit de commutation (32), par lequel quand les contacts du relais (20, 22) sont collés on applique au lieu du signal d'amorçage du relais (14) le signal de sortie d'un générateur (44) produisant une tension alternative ou une tension continue pulsante à l'enroulement du relais ou à l'entrée de commande (38) d'un mécanisme de relais (40) branchant le courant électrique à travers l'enroulement du relais.
  2. Circuit selon la revendication 1, caractérisé en ce que la tension alternative ou la tension continue pulsante sont appliquées à l'enroulement de la bobine du relais (46) avec une fréquence correspondant à la fréquence propre de la monture mécanique du relais.
  3. Circuit selon la revendication 1 ou 2, caractérisé en ce qu'entre la sortie (24) du circuit de comparaison (10) et l'entrée de commande (30) du circuit de commutation (32) il est prévu un circuit temporisé (28), qui fait passer un signal de sortie, indiquant un collage des relais de contact (20, 22), du circuit de comparaison (10) seulement pendant une durée déterminée, prédéfinie, à l'entrée de commande (30) du dispositif de commutation (32).
EP88109154A 1987-06-10 1988-06-08 Procédé pour ouvrir les contacts soudés d'un relais ainsi que circuit pour son exécution Expired - Lifetime EP0294794B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3719298 1987-06-10
DE19873719298 DE3719298A1 (de) 1987-06-10 1987-06-10 Verfahren zum loesen der kontakte eines klebenden relais sowie schaltungsanordnung zur durchfuehrung des verfahrens

Publications (3)

Publication Number Publication Date
EP0294794A2 EP0294794A2 (fr) 1988-12-14
EP0294794A3 EP0294794A3 (en) 1990-08-29
EP0294794B1 true EP0294794B1 (fr) 1993-08-11

Family

ID=6329387

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88109154A Expired - Lifetime EP0294794B1 (fr) 1987-06-10 1988-06-08 Procédé pour ouvrir les contacts soudés d'un relais ainsi que circuit pour son exécution

Country Status (4)

Country Link
US (1) US4914315A (fr)
EP (1) EP0294794B1 (fr)
DE (2) DE3719298A1 (fr)
ES (1) ES2043728T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10160106B4 (de) * 2000-12-08 2006-06-14 Toyota Jidosha K.K., Toyota Relaisverschweißungserfassungsvorrichtung und -erfassungsverfahren

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JPH01186182A (ja) * 1988-01-19 1989-07-25 Fanuc Ltd サーボモータの制御装置
JP2527041B2 (ja) * 1989-07-31 1996-08-21 日本電気株式会社 電源回路
JP2669905B2 (ja) * 1989-09-01 1997-10-29 ファナック株式会社 リレーの溶着検出方法
CA2093064C (fr) * 1992-06-10 1998-08-11 Dennis W. Waggamon Circuit de controle d'etat
JP2879807B2 (ja) * 1992-07-30 1999-04-05 矢崎総業株式会社 スイッチの腐食防止回路
US5363669A (en) * 1992-11-18 1994-11-15 Whirlpool Corporation Defrost cycle controller
DE19632347A1 (de) * 1996-08-10 1998-02-12 Kaco Elektrotechnik Gmbh Schalter, insbesondere Relais
JP3724207B2 (ja) * 1997-09-08 2005-12-07 松下電器産業株式会社 継電器の制御回路
DE19930521A1 (de) * 1999-07-05 2001-01-11 Volkswagen Ag Relaisbauteil
DE50214510D1 (de) 2001-08-30 2010-08-12 Krauss Maffei Wegmann Gmbh & C Artilleriegeschütz mit einer auf einem trägerfahrzeug angeordneten schweren waffe
DE10300828C5 (de) † 2003-01-10 2009-06-10 Dorma Gmbh + Co. Kg Ansteuerung für einen mit Gleichstrom betriebenen Türöffner und Verfahren zur Ansteuerung eines mit Gleichstrom betriebenen Türöffners
JP3625474B1 (ja) * 2004-04-05 2005-03-02 富士通テン株式会社 接点腐食防止回路
JP4599260B2 (ja) * 2004-09-28 2010-12-15 プライムアースＥｖエナジー株式会社 電源制御装置、電源制御方法、プログラム及び記録媒体
US7298148B2 (en) * 2006-03-02 2007-11-20 Emerson Electric Co. Relay controller
US20080055024A1 (en) * 2006-08-31 2008-03-06 Motorola, Inc. System and method for protection of unplanned state changes of a magnetic latching relay
US20100157502A1 (en) * 2008-12-18 2010-06-24 Caterpillar Inc. System for decoupling a power source from a load
WO2010129071A1 (fr) * 2009-05-08 2010-11-11 Computer Performance, Inc. Commutation et détection de courant isolées en ca avec un nombre réduit de composants
FR2959593B1 (fr) * 2010-04-30 2012-12-28 Schneider Electric Ind Sas Appareil de commutation electromagnetique de type contacteur et procede d'ouverture d'un tel appareil.
JP2013528313A (ja) * 2010-06-08 2013-07-08 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ フェイルセーフな照明システム
DE102012222129A1 (de) * 2012-12-04 2014-06-05 Robert Bosch Gmbh Verfahren zum Betrieb eines Ansteuerkreises eines elektromagnetischen Schalters
CN104850043A (zh) * 2015-04-27 2015-08-19 浙江恒自电力自动化设备有限公司 微机保护测控装置
CN107275157B (zh) * 2017-07-24 2020-05-26 浙江英洛华新能源科技有限公司 一种继电器运动部件检测电路及具有该电路的继电器
CN113223895B (zh) * 2020-01-21 2022-08-12 株洲中车时代电气股份有限公司 一种继电器的输出安全控制电路
DE102020007452B4 (de) 2020-12-07 2023-06-22 Daimler Truck AG Verfahren zum Betreiben einer Schalteinrichtung eines elektrischen Netzes, sowie Schalteinrichtung
DE102022107181B3 (de) 2022-03-25 2023-05-11 Webasto SE Leistungsschaltung und Verfahren zur Erhöhung der Lösekräfte beim Schalten eines Relais, sowie ein Relais, ein Ladegerät und eine Steuereinheit

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JPS632219A (ja) * 1986-06-20 1988-01-07 株式会社東芝 リレ−駆動回路

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10160106B4 (de) * 2000-12-08 2006-06-14 Toyota Jidosha K.K., Toyota Relaisverschweißungserfassungsvorrichtung und -erfassungsverfahren

Also Published As

Publication number Publication date
ES2043728T3 (es) 1994-01-01
EP0294794A3 (en) 1990-08-29
DE3719298A1 (de) 1988-12-22
DE3719298C2 (fr) 1991-02-07
EP0294794A2 (fr) 1988-12-14
US4914315A (en) 1990-04-03
DE3883086D1 (de) 1993-09-16

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