EP0879475B1 - Systeme de commande electronique a aimant de commutation pour le maintien d'un contacteur - Google Patents

Systeme de commande electronique a aimant de commutation pour le maintien d'un contacteur Download PDF

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Publication number
EP0879475B1
EP0879475B1 EP97900577A EP97900577A EP0879475B1 EP 0879475 B1 EP0879475 B1 EP 0879475B1 EP 97900577 A EP97900577 A EP 97900577A EP 97900577 A EP97900577 A EP 97900577A EP 0879475 B1 EP0879475 B1 EP 0879475B1
Authority
EP
European Patent Office
Prior art keywords
armature
sensor
coil
switching magnet
mark
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
EP97900577A
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German (de)
English (en)
Other versions
EP0879475A1 (fr
Inventor
Klaus Dieter NÜRENBERG
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.)
Eaton Industries GmbH
Original Assignee
Moeller GmbH
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
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Application filed by Moeller GmbH filed Critical Moeller GmbH
Publication of EP0879475A1 publication Critical patent/EP0879475A1/fr
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Classifications

    • 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
    • H01H9/16—Indicators for switching condition, e.g. "on" or "off"
    • H01H9/168—Indicators for switching condition, e.g. "on" or "off" making use of an electromagnetic wave communication
    • 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

Definitions

  • the invention relates to an electronic switching magnet control for contactors, where the contactor has a coil, which drives switch contacts via an armature, which between one ON and an OFF position moves, and the solenoid control has a sensor with which the position of the Coil drivable armature can be determined, with a mark on the armature, which can be detected by the sensor.
  • a contactor is an electromechanical switch, the output of which it is to close or disconnect a circuit.
  • the contactor has one or more electrical ones Contacts depending on the position of the armature moving them be opened or closed.
  • the anchor is by means of a coil back and forth, the coil with a DC voltage is applied to set a certain coil current can be clocked, among other things.
  • a switching device is known from DE 44 09 010 A1, where the position of the movable Organ, in particular the armature of a contactor, during the Switching process can be determined.
  • the sensor is a potentiometer consisting of an elongated sensor element and a movable runner attached to the anchor, which is supported on the sensor element. Using the determined The position of the movable organ of the contactor is changed during the Switching the coil current over the entire displacement distance controlled, on the one hand the closing force of the contactor increased and secondly the electrical and mechanical Durability of the device is improved.
  • the coil is connected to a current sensor in series. The coil current is dependent on the difference between target coil current and measured actual coil current controlled by a pulse modulation circuit, the Coil current depends on the level of pulse size modulation.
  • Another switching magnet control is from DE 38 22 342 C2 known, the shift solenoid control a number of Photoelectric sensors consisting of photodiodes and a series of has light emitting diodes, which on both sides of the Anchor are arranged.
  • the anchor has a light interruption mark, the light path of the individual light barriers interrupts individually or one after the other when moving the anchor. This allows the position of the anchor or the Switch contacts can be determined precisely. By processing it is the position signals of the individual light barriers possible, an uneven switching of the contactor over all three phases of the circuit to be closed and opened to recognize.
  • the holding phase begins, in which the anchor of the coil no longer accelerates, but only in the ON position must be kept.
  • the holding current in the coil adjust during this phase so that the anchor is straight still remains dressed.
  • the coil current can thus during the Hold phase can be chosen relatively small.
  • a small holding current has the disadvantage, however, that even with slight vibrations the armature and, if necessary, the switching contacts a little later can be deflected from the ON position, whereby the circuit closed by the contactor is unintentionally interrupted can be.
  • DE 40 31 427 A1 describes a method for reducing energy Operation of an electromagnetic actuator known in which a maximum electrical for switching the actuator Power is supplied, and after switching the supplied Power on one to keep the switching state sufficient value is lowered, the ingested Switching status constantly monitored and when the Switching state, that is, by a reaction of the circle on the actuator, the actuator for a predetermined period of time an increased, especially the maximum Power is supplied.
  • the power supplied to it to the Start of a minimum power permitting a switching state change is reduced when the minimum power is reached the increased electrical power is applied to the actuator, and after a predeterminable period of time the electrical Performance again reduced to a performance value which is the Minimum performance plus a specifiable safety reserve performance corresponds.
  • the object of the invention is therefore a solenoid control to provide with the unwanted deflection of the Anchor is recognized immediately from the ON position.
  • the Sensor is arranged for marking so that at a small displacement of the armature from the ON position of the sensor the marking is detected and a corresponding signal is sent to the Shift solenoid control sends out.
  • the sensor has the advantage that small deflections of the Anchor from the ON position by the sensor immediately be detected and the solenoid control immediately take appropriate countermeasures. After finding the unwanted deflection is by means of a voltage supply the coil sets a maximum possible current in the coil or adjusts so that the one built up by the coil Magnetic field reaches a maximum strength, and the anchor from Magnetic field is accelerated in the direction of the ON position.
  • the magnetic field is only for a very specific one Time built up.
  • the anchor reaches during this predetermined maximum time is not in the ON position, it switches the solenoid control switches off the contactor.
  • the solenoid control lowers the Strength of the magnetic field or that flowing through the coil Current to a predetermined minimum strength so far that the Anchor just doesn't drop off.
  • the sensor is advantageously a light barrier mechanical switch, a Hall detector or an induction switch.
  • FIG. 1 shows an electronically controlled contactor 2, by means of which at least one phase 15 of a circuit can be interrupted or closed.
  • the switch contact 5 is closed.
  • the switching contact 5 pressurized by a contact force spring 5a is in loose connection with an armature 4 which can be moved by means of the coil 7.
  • a voltage U coil to the lead wires 7a of the coil 7 flows in this current I, which generates a magnetic field which draws the armature 4 in the coil.
  • the armature 4 covers a stroke distance between the ON position (FIG. 1) and the OFF position.
  • the armature 4 has a marking 4a which is detected by the sensor S, 3a as soon as the marking 4a passes the sensor S, 3a.
  • the sensor S, 3a can be a light barrier, S being the photodetector and 3a being the light source.
  • the marking 4a is a recess or bore.
  • the photodetector S and the light source 3a are connected by means of the feed lines 3b, 3c to the switching magnet control, not shown in FIG. 1.
  • FIG. 2 shows a path-time diagram of the marking 4a of the armature 4.
  • the contactor 2 is switched on, that is to say the armature 4 is in the ON position and the switching magnet control specifies the holding current I Hold .
  • the armature 4 with its marking 4a is deflected towards the OFF position at the time T 1 , the marking 4a being detected by the sensor S, 3a and the solenoid control triggering the maximum target current I max pretends.
  • the armature 4 does not have to be deflected so far that the switch contact 5 has also been deflected.
  • a strong magnetic field is now built up in the coil 7, which tries to push the armature 4 into the ON position.
  • the marking 4a is no longer detected.
  • the solenoid control evaluates this in that the armature 4 is again in the ON position and again specifies the holding current I Hold .
  • the armature 4 is again deflected out of the ON position by a disturbance, and the marking 4a is detected by the sensor S, 3a, whereupon the switching magnet control again specifies the maximum starting current I max .
  • the armature 4 is not yet in the ON position again. This may be due to an excessive deflection of the armature 4, for example. So that the coil 7 is not destroyed by the thermal load and other electrical devices are not unbalanced by a fault current caused by the deflected contactor 2, the switching magnet control switches off the contactor at time T 4 and sends a fault message to a higher-level control or other contactors, whereby these are also triggered.
  • the sensor S, 3a can be of the form that it detects the marking 4a over a relatively long distance. This can also be achieved by appropriately designing the marking.
  • the sensor S, 3a can also be composed of a plurality of individual sensors arranged along the direction of travel, by means of which the direction of movement and the speed of the armature 4 or its marking 4a can be determined. For example, the time t max can be recalculated depending on the position, speed and direction of movement of the armature 4 in order to move the armature 4 into the ON position with great certainty.
  • a program for holding a contactor 2 in the ON position for the solenoid control according to the invention is shown in FIG.
  • the holding phase is initiated and the holding current I Hold is specified (step S1).
  • the program then continuously checks whether the marking 4a has been detected by the sensor S, 3a (steps S2 and S3). As soon as the sensor S, 3a detects the marker 4a (step S2) due to a fault, the program branches to step S4, and the maximum target current I max is specified, a counter (not shown) being reset and started.
  • step S5 The program now runs through the loop formed by steps S4, S5 and S6 until the maximum time t max has been exceeded (step S5) or the armature 4 has returned to the ON position, in the latter case the sensor S, 3a the marker 4a is no longer detected (step S6). If the maximum time t max has been exceeded, the program branches to step S7, an error message being sent to a higher-level controller, and then initiates the switch-off process with step S8. If the ON position is reached by the armature 4 during the maximum target current specification, this is determined in step S6 and the program returns to step S1. The normal holding current I holding is then again specified until the contactor 2 is switched off or the armature 4 is deflected unintentionally by a fault.
  • FIG. 4 shows a block diagram of a possible switching magnet control 1.
  • the switching on or off of the contactor 2 can be initiated by means of conventional input means 13, such as a command switch or the like. It is advantageous here if the solenoid control 1 has an auxiliary power supply 16 and the control is carried out via a data and control bus 12.
  • a voltage regulator 9 By means of a voltage regulator 9, the coil voltage U coil applied to the coil 7 is adjusted as a function of the difference between I ist and I soll .
  • the timer 10 is controlled, ie reset and / or started, by means of a control block 17 and a displacement sensor 3.
  • the corresponding position to the armature current target value I is in this case intended to be stored advantageously in a nonvolatile memory 11, read out if necessary, and fed to a comparator 20th
  • the actual current I ist the coil 7 is determined by means of the ammeter 6 and is also fed to the comparator 20.
  • Both the actual current I ist and the signals from the displacement sensor 3 and the contact system 5 are fed to a message block 19.
  • the message block 19 communicates by means of the data and control bus 12 with other electronic devices, not shown.
  • the solenoid control 1 also has a control circuit 18 by means of which the contactor 2 is switched off.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Relay Circuits (AREA)
  • Magnetically Actuated Valves (AREA)
  • Braking Arrangements (AREA)
  • Air Bags (AREA)
  • Keying Circuit Devices (AREA)

Claims (4)

  1. Commande électronique à aimant de commutation pour contacteurs-disjoncteurs, le contacteur-disjoncteur (2) étant pourvu d'une bobine magnétique (7) actionnant des contacts de commutation (5) par l'intermédiaire d'un induit (4), lequel se déplace entre une position ON et une position OFF, et la commande à aimant de commutation (1) étant pourvue d'un capteur (3; S, 3a) permettant de saisir la position de l'induit (4) actionné par la bobine magnétique (7), une marque-repère (4a) détectée par le capteur (3; S, 3a) étant placée sur l'induit (4), caractérisée en ce que le capteur (3; S, 3a) est placé par rapport à la marque-repère (4a) de telle manière que, pour une déport minime de l'induit (4) hors de la position ON, le capteur (3; S, 3a) détecte la marque-repère (4a) et adresse un signal correspondant à la commande à aimant de commutation (1), en ce que la commande à aimant de commutation (1) excite la bobine magnétique (7) avec une tension appliquée de telle manière que la bobine magnétique (7) produit un champ magnétique maximum, lequel manoeuvre l'induit (4) en direction de la position ON, dès que le capteur (3; S, 3a) a détecté la marque-repère (4a), et en ce que la commande à aimant de commutation (1) règle ou régule l'intensité du champ magnétique maximum pour une durée maximale prédéfinie (tmax) et la coupe à l'expiration de la durée maximale (tmax).
  2. Commande électronique à aimant de commutation selon revendication 1 ou 2, caractérisée en ce que le courant effectif (Imax) de la bobine magnétique (7) peut être déterminé au moyen d'un ampèremètre (6) et qu'un courant de consigne maximum prédéfini peut être réglé au moyen d'une boucle d'asservissement dans la bobine (7) dès que le capteur (3; S, 3a) détecte l'induit (4), et en ce que le courant de consigne maximum (Imax) produit un champ magnétique repoussant l'induit (4) en position ON.
  3. Commande électronique à aimant de commutation selon revendication 1 ou 2, caractérisée en ce que la commande à aimant de commutation (1) réduit l'intensité du champ magnétique à une intensité minimale prédéfinie dès que l'induit (4) arrive en position ON dans l'intervalle de durée maximale prédéfinie (tmax) ou que le capteur (3; S, 3a) ne détecte plus l'induit (4).
  4. Commande électronique à aimant de commutation selon l'une des revendications précédentes, caractérisée en ce que le capteur (3; S 3a) est une barrière photoélectrique, un interrupteur mécanique, un détecteur de Hall ou un interrupteur à induction.
EP97900577A 1996-02-06 1997-01-09 Systeme de commande electronique a aimant de commutation pour le maintien d'un contacteur Expired - Lifetime EP0879475B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19605759 1996-02-06
DE19605759A DE19605759A1 (de) 1996-02-06 1996-02-06 Elektronische Schaltmagnetansteuerung zum Halten eines Schützes
PCT/EP1997/000054 WO1997029502A1 (fr) 1996-02-06 1997-01-09 Systeme de commande electronique a aimant de commutation pour le maintien d'un contacteur

Publications (2)

Publication Number Publication Date
EP0879475A1 EP0879475A1 (fr) 1998-11-25
EP0879475B1 true EP0879475B1 (fr) 1999-09-29

Family

ID=7785577

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Application Number Title Priority Date Filing Date
EP97900577A Expired - Lifetime EP0879475B1 (fr) 1996-02-06 1997-01-09 Systeme de commande electronique a aimant de commutation pour le maintien d'un contacteur

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Country Link
EP (1) EP0879475B1 (fr)
AT (1) ATE185218T1 (fr)
DE (2) DE19605759A1 (fr)
WO (1) WO1997029502A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5983105A (en) * 1997-03-17 1999-11-09 Nokia Telecommunications Oy Method and receiver implemented on the rake principle
JP2007047270A (ja) * 2005-08-08 2007-02-22 Komori Corp 異常状態判断方法および装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3239840C2 (de) * 1982-10-27 1986-11-20 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zum Betätigen elektromagnetischer Schaltgeräte
JPH0792016B2 (ja) * 1986-06-09 1995-10-09 三菱電機株式会社 内燃機関用燃料噴射弁駆動回路の故障検出回路
DE3822342A1 (de) * 1987-07-09 1989-01-19 Mitsubishi Electric Corp Strompfadunterbrecher
DE4129265A1 (de) * 1991-08-30 1993-03-04 Mannesmann Ag Elektromagnetisches schaltgeraet
FR2702880B1 (fr) * 1993-03-17 1995-04-28 Telemecanique Appareil interrupteur électromagnétique.
DE4430867A1 (de) * 1994-08-31 1996-03-07 Licentia Gmbh Schaltungsanordnung zur Regelung des elektromagnetischen Antriebes eines Schaltgerätes

Also Published As

Publication number Publication date
DE19605759A1 (de) 1997-08-07
ATE185218T1 (de) 1999-10-15
DE59700505D1 (de) 1999-11-04
EP0879475A1 (fr) 1998-11-25
WO1997029502A1 (fr) 1997-08-14

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