EP0650177B1 - Method of driving parallel arranged relays - Google Patents
Method of driving parallel arranged relays Download PDFInfo
- Publication number
- EP0650177B1 EP0650177B1 EP94114740A EP94114740A EP0650177B1 EP 0650177 B1 EP0650177 B1 EP 0650177B1 EP 94114740 A EP94114740 A EP 94114740A EP 94114740 A EP94114740 A EP 94114740A EP 0650177 B1 EP0650177 B1 EP 0650177B1
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- rel
- relay
- relay operating
- switch
- switched
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- 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
- H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
- H01H47/32—Energising current supplied by semiconductor device
- H01H47/325—Energising current supplied by semiconductor device by switching regulator
Definitions
- the invention relates to a method for controlling relay excitation coils according to the preamble of claim 1. (EP-A- 0 392 058).
- a relay has an armature through which switch contacts can be actuated.
- the force required for actuation must be applied by the relay excitation coil.
- a certain current through the excitation coil is required to attract the armature and to actuate the switch contacts. Since the losses in the magnetic circuit caused by the air gap become smaller after the armature has been tightened, a lower current is sufficient to hold the contacts than to tighten. The consequence of this is that in general the drive current of the relay can be reduced by half to a third in this case, as a result of which the power loss due to the lower holding current and thus the heating of the excitation coil is reduced.
- a known method is that after reaching the response state, the holding current is reduced by switching to a voltage source with a lower supply voltage.
- Another known method is that the relay is controlled with a clock ratio after reaching the response state, so that the holding current drops to a steady state.
- Another known method is to initially supply the relay with a higher control voltage, which is possible with the aid of a voltage multiplier.
- relays or relay groups are to be supplied by one voltage source, a separate circuit is required for each relay, for example for clocking. This requires a lot of circuitry and thus high manufacturing costs.
- the flowchart shown in FIG. 1 shows the process sequence for switching on and switching off several relays.
- the routine begins at step S1. In a subsequent step S2, all the desired relays are switched on. In a subsequent decision step S3, a decision is made as to whether the desired relays have picked up. If “No” is determined, the desired relays continue to be supplied with the starting current. If “yes” is determined, the routine proceeds to step S4, where the desired relays are driven with a clock ratio.
- step S5 it is determined whether all or individual relays are to be switched off. If “No” is determined, this or these are further controlled at S4 with the clock ratio. If “yes” is decided, the relays that are to remain switched on are fixed via a switch at step S6, i.e. without a clock ratio, switched on. In a subsequent step S7, a common switch is operated simultaneously. With this switch, the relays to be switched off are quickly switched off. The routine ends at step S8.
- FIG. 2 now shows a circuit arrangement with which a clocked control can be carried out.
- two relay excitation coils Rel 1 and Rel 2 are connected in parallel to a voltage source Ub, each of which can be switched by a switch s1, s2 located in series.
- a diode D1, D2 connected in the reverse direction is connected, to which a common Z-diode Z operated in the reverse direction is connected, the anode of which is connected to the voltage source Ub.
- a common switch s0 is arranged parallel to the Zener diode Z, through which the Zener diode Z can be bridged.
- the switches s1, s2 can be switched clocked by a clock generator, not shown, according to the method.
- the time course of the current as a function of time is shown on the basis of a diagram which shows the current course through the relay excitation coil Rel 1 as an example.
- the relay excitation coil Rel 1 is switched on by the switch s1 to the voltage source Ub, as a result of which the current in the relay excitation coil Rel 1 u. due to the occurring induction voltage, which counteracts the applied voltage Ub, increases with a delay.
- the common switch s0 is closed.
- the response state of relay Rel 1 should be reached, the small dip in the current curve, which occurs due to the changing inductance due to the attraction of the armature, not being shown.
- the response state of the relay excitation coil Rel 1 is thus reached at the time t1, the time t1 being determined beforehand by measurement or calculation from the power supply voltage Ub, the ohmic resistance of the relay excitation coil, the inductance and the temperature which arises.
- switch s1 now begins to clock due to the activation of the clock generator.
- the switch s1 is thus opened at the time t1, so that the current i1 in the relay excitation coil Rel 1 drops.
- the negative switch-off voltage peak occurring at time t1 breaks down due to the diode D1 to the value of its forward voltage drop, so that the switch-off peak is reduced.
- the common switch s0 remains closed.
- the switch s1 is now closed again by the clock generator, with the result that the current i1 in the relay excitation coil Rel 1 rises again.
- the switch s1 is opened again, so that the current i1 in the relay excitation coil Rel 1 rises again.
- the process continues alternately over the times t4, t5, so that after a certain time the steady state shown in FIG. 4 is established, the current i1 forming the holding current at which the relay armature remains attracted.
- the magnitude of the current i1 is determined by the ratio of the switch-on time Tx to the switch-off time Ty indicated in FIG. 3, which is referred to as the clock ratio.
- the diagram shown in FIG. 5 shows the current profile i1 (t) in the relay excitation coil Rel 1, the current profile i2 (t) in the relay excitation coil Rel 2 and the switch positions s1, s2, s0, the thick lines of the switch positions showing the closed state to indicate this switch.
- the time profile of the currents i1 and i2 at the time t0 to thousand corresponds to the current profile shown in FIGS. 3 and 4 for the steady state. Accordingly, the current i1 is controlled clocked by the relay excitation coil Rel 1, as is the current i2 by the relay excitation coil Rel 2.
- the switches s1 and s2 are controlled clocked in accordance with the clock ratio. The switch s0 is always closed.
- the switch S0 has a certain resistance in the "on" position (the switch can be designed as a transistor switch), whereas the resistance of the Z diode is extremely small in the region of the breakdown voltage, so that the relay excitation coil rel 1 is quickly discharged via the diode D1, which leads to a desired rapid drop in the relay armature of the excitation coil Rel 1.
- the voltage between the diode D1 and the Zener diode rises briefly steeply, so that if the switch s2 were actuated in this state, that is, the switch s2 was also temporarily switched off, the relay Rel 2 would fall off.
- the switch s2 (and possible other switches) is closed, which remains in a closed position in a non-clocked operation until the time t1 until the time t1 is reached , where, as already described in Figure 3, is switched back to clocked operation.
- the power loss increases again somewhat, but the component expenditure is significantly lower.
- FIG. 6 shows a subcircuit for generating the control signals for the switches s1 and s2, although this task can also be performed by a microprocessor.
- the circuit consists of two inputs E1, E2, each of which is connected to an input of an AND gate, the signals for Si1, Si2 being removable at its output.
- the inputs E1, E2 are also connected to a monostable, retriggerable flip-flop Q, which here has two negative edge-controlled inputs.
- the exit of the Flip-flops are connected to an input of two OR gates, the other input of the two OR gates being connected to a clock generator.
- the respective outputs of the two OR gates are connected to the respective second input of the AND gates.
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Description
Die Erfindung betrifft ein Verfahren zur Ansteuerung von Relaiserregerspulen nach dem Oberbegriff von Patentanspruch 1. (EP-A- 0 392 058).The invention relates to a method for controlling relay excitation coils according to the preamble of
Bekanntlich weist ein Relais einen Anker auf, durch den Schaltkontakte betätigt werden können. Die zur Betätigung erforderliche Kraft muß von der Relaiserregerspule aufgebracht werden. Bei gegebener Windungszahl der Erregerspule ist zum Anzug des Ankers und zur Betätigung der Schaltkontakte ein bestimmter Strom durch die Erregerspule erforderlich. Da nach dem Anzug des Ankers die durch den Luftspalt hervorgerufenen Verluste im magnetischen Kreis geringer werden, genügt zum Halten der Kontakte ein niedrigerer Strom als zum Anzug. Die Folge davon ist, daß im allgemeinen der Ansteuerstrom des Relais in diesem Fall auf die Hälfte bis auf ein Drittel verringert werden kann, wodurch sich die Verlustleistung aufgrund des niedrigeren Haltestroms und damit die Erwärmung der Erregerspule verringert.As is known, a relay has an armature through which switch contacts can be actuated. The force required for actuation must be applied by the relay excitation coil. For a given number of turns of the excitation coil, a certain current through the excitation coil is required to attract the armature and to actuate the switch contacts. Since the losses in the magnetic circuit caused by the air gap become smaller after the armature has been tightened, a lower current is sufficient to hold the contacts than to tighten. The consequence of this is that in general the drive current of the relay can be reduced by half to a third in this case, as a result of which the power loss due to the lower holding current and thus the heating of the excitation coil is reduced.
Zur Verringerung des Haltestroms sind verschiedene Verfahren bekannt. Ein bekanntes Verfahren besteht darin, daß nach Erreichen des Ansprechzustandes der Haltestrom dadurch verringert wird, indem man auf eine Spannungsquelle mit einer niedrigeren Versorgungsspannung umschaltet. Ein anderes bekanntes Verfahren besteht darin, daß man das Relais nach Erreichen des Ansprechzustandes mit einem Taktverhältnis ansteuert, so daß der Haltestrom bis auf einen eingeschwungenen Endzustand absinkt. Ein weiteres bekanntes Verfahren besteht darin, das Relais anfangs mit einer höheren Ansteuerspannung zu versorgen, was mit Hilfe eines Spannungsvervielfachers möglich ist.Various methods are known for reducing the holding current. A known method is that after reaching the response state, the holding current is reduced by switching to a voltage source with a lower supply voltage. Another known method is that the relay is controlled with a clock ratio after reaching the response state, so that the holding current drops to a steady state. Another known method is to initially supply the relay with a higher control voltage, which is possible with the aid of a voltage multiplier.
Wenn mehrere Relais oder Relaisgruppen durch eine Spannungsquelle versorgt werden sollen, so ist beispielsweise für das Takten für jedes Relais eine eigene Schaltung erforderlich. Das bedingt einen hohen Schaltungsaufwand und damit hohe Herstellungskosten.If several relays or relay groups are to be supplied by one voltage source, a separate circuit is required for each relay, for example for clocking. This requires a lot of circuitry and thus high manufacturing costs.
Es ist Aufgabe der vorliegenden Erfindung, ein Verfahren aufzuzeigen, mit dem mehrere Relais bauteilesparend und verlustarm betrieben werden können.It is an object of the present invention to demonstrate a method with which several relays can be operated in a component-saving and low-loss manner.
Die Aufgabe wird erfindungsgemäß durch den Patentanspruch 1 gelöst. Vorteilhafte Weiterbildungen sind in den Unteransprüchen gekennzeichnet.The object is achieved by
Die Erfindung wird nun anhand von sieben Figuren näher erläutert.The invention will now be explained in more detail with reference to seven figures.
Es zeigen:
Figur 1 ein Flußdiagramm zur Erklärung des Verfahrensablaufs nach der Erfindung;Figur 2 eine Schaltungsanordnung zur Ansteuerung von zwei Relais;Figur 3 einen Stromverlauf zur Erklärung der Wirkungsweise der Schaltungsanordnung vonFigur 2;- Figur 4 einen Stromverlauf zur Erklarung des eingeschwungenen Zustandes der Anordnung nach
Figur 2; - Figur 5 einen Stromverlauf zur Erklärung des Aussschaltvorganges der Anordnung nach
Figur 2; - Figur 6 eine Schaltungsanordnung zur Erzeugung der Ansteuersignale der Anordnung nach
Figur 2; und - Figur 7 die Schalterstellungen von drei Relais sowie das entsprechende Ausgangssignal eines monostabilen, wiedertriggerbaren Flip-Flops.
- Figure 1 is a flow chart for explaining the process flow according to the invention;
- Figure 2 shows a circuit arrangement for controlling two relays;
- FIG. 3 shows a current profile to explain the mode of operation of the circuit arrangement from FIG. 2;
- FIG. 4 shows a current profile to explain the steady state of the arrangement according to FIG. 2;
- FIG. 5 shows a current profile to explain the switching-off process of the arrangement according to FIG. 2;
- FIG. 6 shows a circuit arrangement for generating the control signals of the arrangement according to FIG. 2; and
- Figure 7 shows the switch positions of three relays and the corresponding output signal of a monostable, retriggerable flip-flop.
Das in Figur 1 gezeigte Flußdiagramm zeigt den Verfahrensablauf zum Einschalten und Ausschalten von mehreren Relais. Bei Schritt S1 beginnt die Routine. In einem darauf folgenden Schritt S2 werden alle gewünschten Relais eingeschaltet. In einem sich daran anschließenden Entscheidungsschritt S3 wird entschieden, ob die gewünschten Relais angezogen haben. Wenn "Nein" festgestellt wird, werden die gewünschten Relais weiter mit dem Anzugsstrom versorgt. Wenn "Ja" festgestellt wird, schreitet die Routine zu Schritt S4, wo die gewünschten Relais mit einem Taktverhältnis angesteuert werden.The flowchart shown in FIG. 1 shows the process sequence for switching on and switching off several relays. The routine begins at step S1. In a subsequent step S2, all the desired relays are switched on. In a subsequent decision step S3, a decision is made as to whether the desired relays have picked up. If "No" is determined, the desired relays continue to be supplied with the starting current. If "yes" is determined, the routine proceeds to step S4, where the desired relays are driven with a clock ratio.
In einem weiteren Schritt S5 wird festgestellt, ob alle oder einzelne Relais abgeschaltet werden sollen. Wenn "Nein" festgestellt wird, werden dieses oder diese bei S4 weiter mit dem Taktverhältnis angesteuert. Wenn "Ja" entschieden wird, werden bei Schritt S6 die Relais, die eingeschaltet bleiben sollen, über einen Schalter fest, d.h. ohne ein Taktverhältnis, eingeschaltet. In einem sich anschließenden Schritt S7 wird gleichzeitig ein gemeinsamer Ausschalter betätigt. Durch diesen Ausschalter werden die auszuschaltenden Relais schnell ausgeschaltet. Bei Schritt S8 endet die Routine.In a further step S5 it is determined whether all or individual relays are to be switched off. If "No" is determined, this or these are further controlled at S4 with the clock ratio. If "yes" is decided, the relays that are to remain switched on are fixed via a switch at step S6, i.e. without a clock ratio, switched on. In a subsequent step S7, a common switch is operated simultaneously. With this switch, the relays to be switched off are quickly switched off. The routine ends at step S8.
Figur 2 zeigt nun eine Schaltungsanordnung, mit der eine getaktete Ansteuerung durchgeführt werden kann. Als Beispiel sind zwei Relaiserregerspulen Rel 1 und Rel 2 parallel an eine Spannungsquelle Ub angeschaltet, die jeweils durch einen in Reihe liegenden Schalter s1, s2 geschaltet werden können. Parallel zur jeweiligen Relaiserregerspule Rel 1, Rel 2 ist jeweils eine in Sperrichtung geschaltete Diode D1, D2 angeschlossenen, an die sich eine gemeinsame in Sperrichtung betriebene Z-Diode Z anschließt, deren Anode mit der Spannungsquelle Ub verbunden ist. Parallel zur Z-Diode Z ist ein gemeinsamer Ausschalter s0 angeordnet, durch den die Z-Diode Z überbrückbar ist. Die Schalter s1, s2 können gemäß dem Verfahren von einem nicht dargestellten Taktgenerator getaktet geschaltet werden.Figure 2 now shows a circuit arrangement with which a clocked control can be carried out. As an example, two relay
In Figur 3 ist nun der zeitliche Verlauf des Stroms in Abhängigkeit von der Zeit anhand eines Diagramms dargestellt, das als Beispiel den Stromverlauf durch die Relaiserregerspule Rel 1 zeigt. Im Zeitpunkt t0 wird die Relaiserregerspule Rel 1 durch den Schalter s1 an die Spannungsquelle Ub angeschaltet, wodurch der Strom in der Relaiserregerspule Rel 1 u.a. aufgrund der auftretenden Induktionsspannung, die der angelegten Spannung Ub entgegenwirkt, verzögert ansteigt. Der gemeinsame Ausschalter s0 ist geschlossen. Im Zeitpunkt t1 soll der Ansprechzustand des Relais Rel 1 erreicht sein, wobei der kleine Einbruch in der Stromkurve, der durch die sich dabei ändernde Induktivität durch das Anziehen des Ankers auftritt, nicht dargestellt ist. Im Zeitpunkt t1 wird also der Ansprechzustand der Relaiserregerspule Rel 1 erreicht, wobei der Zeitpunkt t1 vorher durch Messung oder Berechnung aus der Stromversorgungsspannung Ub, dem ohmschen Widerstand der Relaiserregerspule, der Induktivitat und der sich einstellenden Temperatur bestimmt wird.In FIG. 3, the time course of the current as a function of time is shown on the basis of a diagram which shows the current course through the relay
Im Zeitpunkt t1 beginnt nun der Schalter s1 aufgrund der Ansteuerung des Taktgenerators zu takten. Somit wird der Schalter s1 im Zeitpunkt t1 geöffnet, so daß der Strom i1 in der Relaiserregerspule Rel 1 absinkt. Die im Zeitpunkt t1 auftretenden negative Ausschaltspannungsspitze bricht aufgrund der Diode D1 auf den Wert ihres Vorwärtsspannungsabfalls zusammen, so daß die Abschaltspitze abgebaut wird. Der gemeinsame Ausschalter s0 bleibt weiterhin geschlossen.At time t1, switch s1 now begins to clock due to the activation of the clock generator. The switch s1 is thus opened at the time t1, so that the current i1 in the relay
Im Zeitpunkt t2 wird nun der Schalter s1 durch den Taktgenerator wieder geschlossen, was zur Folge hat, daß der Strom i1 in der Relaiserregerspule Rel 1 wieder ansteigt. Im Zeitpunkt t3 wird der Schalter s1 wieder geöffnet, so daß der Strom i1 in der Relaiserregerspule Rel 1 wieder ansteigt. Dieser Vorgang setzt sich über die Zeitpunkte t4, t5 abwechselnd fort, so daß sich nach einer gewissen Zeit der in Figur 4 gezeigte eingeschwungene Endzustand einstellt, wobei der Strom i1 den Haltestrom bildet, bei dem der Relaisanker angezogen bleibt. Die Höhe des Stroms i1 wird durch das in Figur 3 angedeutete Verhaltnis der Einschaltdauer Tx zur Ausschaltdauer Ty bestimmt, was als Taktverhältnis bezeichnet wird.At time t2, the switch s1 is now closed again by the clock generator, with the result that the current i1 in the relay
In Figur 5 wird nun der Ausschaltvorgang erläutert und zwar unter der Annahme, daß die Relaiserregerspule Rel 1 ausgeschaltet werden soll und die Relaiserregerspule Rel 2 weiter eingeschaltet bleiben soll.The switch-off process is now explained in FIG. 5, on the assumption that the relay
Bei dem in Figur 5 dargestellten Diagramm sind der Stromverlauf i1(t) in der Relaiserregerspule Rel 1, der Stromverlauf i2(t) in der Relaiserregerspule Rel 2 und die Schalterstellungen s1, s2, s0 dargestellt, wobei die dicken Linien der Schalterstellungen den geschlossenen Zustand dieser Schalter andeuten sollen.The diagram shown in FIG. 5 shows the current profile i1 (t) in the relay
Der zeitliche Verlauf der Ströme i1 und i2 im Zeitpunkt t0 bis taus entspricht dem in Figur 3 und 4 gezeigten Stromverlauf für den eingeschwungenen Zustand. Demnach wird der Strom i1 durch die Relaiserregerspule Rel 1 getaktet gesteuert, ebenso der Strom i2 durch die Relaiserregerspule Rel 2. Die Schalter s1 und s2 werden gemäß dem Taktverhältnis getaktet gesteuert. Der Schalter s0 ist dabei immer geschlossen.The time profile of the currents i1 and i2 at the time t0 to thousand corresponds to the current profile shown in FIGS. 3 and 4 for the steady state. Accordingly, the current i1 is controlled clocked by the relay
Im Zeitpunkt taus wird entschieden, daß die Relaiserregerspule Rel 1 abschalten soll. Somit wird der Schalter s1 geöffnet, wodurch der Strom i1 entsprechend der in Figur 5 dargestellten Abschaltkurve absinkt. Im gleichen Zeitpunkt öffnet der gemeinsame Ausschalter s0, so daß die Abschaltspannungsspitze der Relaiserregerspule Rel 1 über die Diode D1 und die gemeinsame Z-Diode begrenzt wird. Damit der Abschaltvorgang für die Relaiserregerspule Rel 1 schnell vor sich geht, sollen alle Relais mit möglichst hoher Abschaltspannung betrieben werden. Deshalb wird im Zeitpunkt taus auch der Schalter s0 , der als gemeinsamer Ausschalter dient, geöffnet. Der Grund dafür ist, daß der Schalter S0 in der "Ein"-Stellung einen gewissen Widerstand aufweist (der Schalter kann als Transistorschalter ausgebildet sein), wogegen der Widerstand der Z-Diode im Bereich der Durchbruchspannung äußerst klein ist, so daß die Relaiserregerspule Rel 1 schnell über die Diode D1 entladen wird, was zu einem gewünschten schnellen Abfall des Relaisankers der Erregerspule Rel 1 führt. Während des Entladens steigt die Spannung zwischen der Diode D1 und der Z-Diode kurzzeitig steil an, so daß, wenn der Schalter s2 weiter getaktet in diesem Zustand angesteuert werden würde, d.h., der Schalter s2 auch zeitweise ausgeschaltet werden wurde, auch das Relais Rel 2 abfallen würde. Damit jedoch die Relaiserregerspule Rel 2 (und mögliche andere Relaiserregerspulen) nicht ebenfalls ausschalten, wird der Schalter s2 (und mögliche andere Schalter) geschlossen, wobei dieser in einem nichtgetakteten Betrieb bis zum Zeitpunkt t1 in einer geschlossenen Stellung verbleibt, bis der Zeitpunkt t1 erreicht ist, wo, wie bereits in Figur 3 beschrieben, wieder auf getakteten Betrieb umgeschaltet wird. Wahrend dieser Phase wird zwar die Verlustleistung wieder etwas größer, der Bauteileaufwand ist aber wesentlich geringer.At the time thousand it is decided that the relay
In Figur 6 ist eine Teilschaltung zur Erzeugung der Ansteuersignale für die Schalter s1 und s2 dargestellt, wobei jedoch diese Aufgabe auch durch einen Mikroprozessor wahrgenommen werden kann.FIG. 6 shows a subcircuit for generating the control signals for the switches s1 and s2, although this task can also be performed by a microprocessor.
Die Schaltung besteht aus zwei Eingängen E1, E2, die jeweils mit einem Eingang eines UND-Gliedes verbunden sind, wobei jeweils an dessen Ausgang die Signale für Si1, Si2 abnehmbar sind. Die Eingänge E1, E2 sind weiterhin mit einem monostabilen, wiedertriggerbaren Flip-Flop Q verbunden, das hier zwei negativ flankengesteuerte Eingänge aufweist. Der Ausgang des Flip-Flops steht mit jeweils einem Eingang von zwei ODER-Gliedern in Verbindung, wobei der jeweilige andere Eingang der zwei ODER-Glieder an einem Taktgenerator angeschlossen ist. Die jeweiligen Ausgänge der beiden ODER-Glieder sind an den jeweiligen zweiten Eingang der UND-Glieder angeschlossen.The circuit consists of two inputs E1, E2, each of which is connected to an input of an AND gate, the signals for Si1, Si2 being removable at its output. The inputs E1, E2 are also connected to a monostable, retriggerable flip-flop Q, which here has two negative edge-controlled inputs. The exit of the Flip-flops are connected to an input of two OR gates, the other input of the two OR gates being connected to a clock generator. The respective outputs of the two OR gates are connected to the respective second input of the AND gates.
In Figur 7 sind als Beispiel drei Relaissignale gezeigt. An jeder abfallenden Flanke des Eingangssignals. d.h., wenn die Ansteuerung des Relais aufhört, soll jedesmal ein AUS_allg Impuls entstehen. Überlappen sich zwei Impulse gegenseitig, so soll der letzte maßgebend sein, d.h., das Monoflop muß wiedertriggerbar sein. Das Ansteuersignal für den Schalter s0 ist logisch mit dem AUS_allg identisch, nur daß eine Potentialverschiebung durchgeführt werden muß.In Figure 7, three relay signals are shown as an example. On every falling edge of the input signal. i.e. when the activation of the relay stops, an OFF_allg pulse should occur each time. If two pulses overlap, the last one should be decisive, i.e. the monoflop must be retriggerable. The control signal for the switch s0 is logically identical to the AUS_allg, only that a potential shift must be carried out.
Claims (6)
- Method for driving a plurality of relay operating coils which are connected in parallel to a common voltage source and can each be switched on and off by relay circuit means assigned to them, the relay operating coils (Rel 1, Rel 2) to be switched on in each case being driven at a duty ratio (Tx,/Ty), after reaching their pull-in state (t1) , via relay circuit means from a common clock generator (TG), in such a manner that a steady state holding current which is less than the pull-in state occurs, characterized in that the relay operating coils (Rel 1, Rel 2) can be switched off by common switching-off means (s0), the respective relay operating coil switching means remaining closed for those relay operating coils which are intended to continue to operate with the holding current in a steady state (Fig. 5), so that a briefly rising pull-in current (i2(t)) occurs in the associated relay operating coil (Rel 2) which, after a predetermined time (t1) is driven once again by the clock generator (TG) at a duty ratio (Tx/Ty).
- Method according to Claim 1, characterized in that the predetermined time is governed by the time duration required for the respective relay operating coil to reach the pull-in state.
- Method according to Claim 1, characterized in that the relay operating coils used are of the same type.
- Method according to Claims 1 and 3, characterized in that, if only a sub-group of relay operating coils are of the same type, the method is applied to this type group.
- Method according to Claim 1, characterized in that the predetermined time duration is calculated and set by a microprocessor.
- Use of a circuit arrangement for carrying out the method according to Claim 1, one diode (D1, D2) in each case being connected in parallel with the respective relay operating coil (Rel 1, Rel 2), each diode being connected in the reverse direction to the voltage source (Ub) via a common zener diode (Z) connected in series in the reverse direction, common switching-off means (s0) being connected in parallel with the zener diode.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4332995A DE4332995C1 (en) | 1993-09-28 | 1993-09-28 | Method for driving relays which are arranged in parallel |
| DE4332995 | 1993-09-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0650177A1 EP0650177A1 (en) | 1995-04-26 |
| EP0650177B1 true EP0650177B1 (en) | 1997-11-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94114740A Expired - Lifetime EP0650177B1 (en) | 1993-09-28 | 1994-09-19 | Method of driving parallel arranged relays |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US5552954A (en) |
| EP (1) | EP0650177B1 (en) |
| DE (2) | DE4332995C1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4429918A1 (en) * | 1994-08-23 | 1996-02-29 | Bosch Siemens Hausgeraete | Circuit arrangement for controlling at least one electrically controllable magnet |
| IT1284693B1 (en) * | 1996-07-23 | 1998-05-21 | Fiat Ricerche | DEVICE FOR CONTROL OF INDUCTIVE LOADS, ESPECIALLY OF INJECTORS IN AN INJECTION SYSTEM FOR A COMBUSTION ENGINE |
| US5892650A (en) * | 1996-11-29 | 1999-04-06 | Denso Corporation | Solenoid valve driving device |
| DE19731269B4 (en) * | 1997-07-22 | 2006-02-23 | Hager Electro Gmbh | Device for switching electrical contacts |
| US20090015066A1 (en) * | 2007-07-10 | 2009-01-15 | Yazaki North America, Inc. | Close-loop relay driver with equal-phase interval |
| CN101866737A (en) * | 2009-04-14 | 2010-10-20 | 杨泰和 | Electromagnetic actuator for starting at high voltage and electrifying and maintaining at low voltage |
| US9871378B2 (en) | 2012-09-28 | 2018-01-16 | Kohler Co. | Paralleling module for a generator system |
| US9548612B2 (en) | 2012-09-28 | 2017-01-17 | Kohler Co. | Paralleling module for a generator system |
| US10186857B2 (en) | 2016-05-16 | 2019-01-22 | Astronics Advanced Electronic Systems Corp. | Paralleling mechanical relays for increased current carrying and switching capacity |
| KR102661621B1 (en) * | 2019-05-03 | 2024-04-29 | 현대자동차주식회사 | System and method for controlling high voltage relay of eco-friendly vehicle |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2053767A1 (en) * | 1969-11-10 | 1971-05-27 | Zentronik Veb K | Circuit arrangement for controlling electromagnets |
| DE2000117A1 (en) * | 1970-01-02 | 1971-07-08 | Anker Werke Ag | Circuit arrangement for operating electromagnetic consumers |
| DE3208660A1 (en) * | 1981-03-12 | 1982-09-23 | Lucas Industries Ltd., Birmingham, West Midlands | Control circuit |
| DE3308660C2 (en) * | 1983-03-11 | 1985-12-19 | Stb Strahlentechnische Bilddiagnostik Heinz Fleck, 2080 Pinneberg | Method for comparing medical x-ray recordings taken at different points in time |
| DE3331678A1 (en) * | 1983-09-02 | 1985-04-04 | Westdeutsche Elektrogerätebau GmbH, 4770 Soest | Circuit arrangement for pull-in and holding excitation of a relay, which excitation can be limited in time by means of external circuitry |
| DE3434343A1 (en) * | 1984-09-19 | 1986-03-27 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Arrangement for the power supply of relays |
| IT1221019B (en) * | 1985-04-01 | 1990-06-21 | Ates Componenti Elettron | INTEGRATED ELECTRONIC DEVICE FOR THE CONTROL OF INDUCTIVE LOADS, WITH RECIRCULATION ELEMENT |
| DE3911431A1 (en) * | 1989-04-07 | 1990-10-11 | Siemens Ag | Integratable free-wheeling circuit |
| EP0392058A1 (en) * | 1989-04-13 | 1990-10-17 | Siemens Aktiengesellschaft | Circuit arrangement for drive of at least one electromagnetic relay |
| DE4026427C1 (en) * | 1990-08-21 | 1992-02-13 | Siemens Ag, 8000 Muenchen, De | |
| DE4117535A1 (en) * | 1991-05-29 | 1992-12-03 | Miele & Cie | Relay control circuit for domestic electrical appliance - uses switching transistor supplied with control signal dependent on supply voltage amplitude |
-
1993
- 1993-09-28 DE DE4332995A patent/DE4332995C1/en not_active Expired - Fee Related
-
1994
- 1994-09-19 EP EP94114740A patent/EP0650177B1/en not_active Expired - Lifetime
- 1994-09-19 DE DE59404623T patent/DE59404623D1/en not_active Expired - Fee Related
- 1994-09-28 US US08/314,153 patent/US5552954A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE4332995C1 (en) | 1994-10-20 |
| DE59404623D1 (en) | 1998-01-02 |
| US5552954A (en) | 1996-09-03 |
| EP0650177A1 (en) | 1995-04-26 |
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