EP1198808B1 - Method for effecting an electronic drive control - Google Patents

Method for effecting an electronic drive control Download PDF

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Publication number
EP1198808B1
EP1198808B1 EP00951390A EP00951390A EP1198808B1 EP 1198808 B1 EP1198808 B1 EP 1198808B1 EP 00951390 A EP00951390 A EP 00951390A EP 00951390 A EP00951390 A EP 00951390A EP 1198808 B1 EP1198808 B1 EP 1198808B1
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EP
European Patent Office
Prior art keywords
value
delay time
instant
supply voltage
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
EP00951390A
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German (de)
French (fr)
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EP1198808A1 (en
Inventor
Wolfgang Meid
Wilhelm Melchert
Gerd Schmitz
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Eaton Industries GmbH
Original Assignee
Moeller GmbH
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Publication of EP1198808A1 publication Critical patent/EP1198808A1/en
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Publication of EP1198808B1 publication Critical patent/EP1198808B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
    • H01H9/56—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere for ensuring operation of the switch at a predetermined point in the ac cycle
    • H01H9/563—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere for ensuring operation of the switch at a predetermined point in the ac cycle for multipolar switches, e.g. different timing for different phases, selecting phase with first zero-crossing

Definitions

  • the invention relates to a method for electronic drive control after The preamble of claim 1. Such a method is e.g. out US-A-5 530 615 is known.
  • EP 0 789 378 A1 is an electronic drive control for a Magnetic drive known.
  • control voltage of a contactor is derived from one of the three phases, it can be sync effects between the closing or opening angle of the Main contacts in the load circuit and the AC control voltage lead.
  • the object of the invention is a method according to the preamble of claim 1 to create, in which the life of a contactor is increased.
  • the invention prevents uneven burning of the switching contacts and thus increases the life of the contactor.
  • Fig. 1 shows a timing diagram in which the rectified in a lower curve Supply voltage is shown, wherein the supply voltage a AC voltage is.
  • a randomly determined delay time t x is provided, which lies between zero and half the period of the control voltage. Only after this delay time, wherein the time is marked with t 3 , the supply voltage is measured, wherein the supply voltage, both a DC and an AC voltage can be. It is checked which supply voltage is concerned (AC or DC). At the same time, the height of the applied voltage is determined. Furthermore, it is checked after t 3 whether the supply voltage is within a predetermined voltage window U min , U max , ie whether the determined value is within the permissible range.
  • the switching point t 5 of the contacts is also distributed randomly for the other phases, which causes a uniform stress on the switching contacts.
  • the undesirable synchronization effect will be explained in more detail with reference to FIG.
  • the dashed lines show different switch-on points, to which different voltage values can be assigned. Since the voltage for starting the microcontroller must first be established, the reset signal is almost always independent of the switch-on time on the same point of the curve, so that the switch-on times are practically synchronized to the same reset time. If the control voltage is switched on, for example, at zero voltage, the supply voltage for the electronics does not build up immediately.
  • Random generator To realize a timer with a variable, randomly set time is Random generator needed.
  • the value provided by the random number generator then becomes edited so that with the subsequent processing of the value a time of Zero to a maximum of half the period of the control voltage results.
  • FIG. 3 shows a schematic diagram.
  • a value is read out in a RAM memory location in the microcontroller, wherein the content of this cell is not defined after power connection.
  • 4 shows the associated flow chart for implementation with a RAM.
  • a value is obtained from a memory cell 1 of an EEPROM, which is manipulated accordingly.
  • the old value is used to determine the new value.
  • the old value is then replaced by the new value in the EEPROM.
  • the manipulated value is written in a register 2.
  • the timer is then started. When the timer reaches zero, a timer underflow will be generated, which will be passed to the CPU, and the program will continue.
  • Fig. 5 shows the corresponding flowchart.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Relay Circuits (AREA)
  • Keying Circuit Devices (AREA)
  • Control Of Electrical Variables (AREA)
  • Control Of Eletrric Generators (AREA)
  • Control Of Electric Motors In General (AREA)
  • Electronic Switches (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

The invention relates to a method for effecting an electronic drive control of a drive coil of a protection system using an electronic device which comprises a microcontroller. The aim of the invention is to increase the serviceable life of a protection system. To this end, the invention uses a randomly selected and constantly changing delay time (tx) that occurs after a time (t2, t3) at which the supply voltage is established on the electronic device.

Description

Die Erfindung betrifft ein Verfahren zur elektronischen Antriebssteuerung nach dem Oberbegriff des Anspruches 1. Ein solches Verfahen ist z.B. aus US-A-5 530 615 bekannt.The invention relates to a method for electronic drive control after The preamble of claim 1. Such a method is e.g. out US-A-5 530 615 is known.

Aus der EP 0 789 378 A1 ist eine elektronische Antriebsteuerung für ein Magnetantrieb bekannt.From EP 0 789 378 A1 is an electronic drive control for a Magnetic drive known.

Wenn die Steuerspannung eines Schützes von einer der drei Phasen abgeleitet wird, kann es zu Synchronisationseffekten zwischen dem Schließ- bzw. Öffnungswinkel der Hauptkontakte im Lastkreis und der AC Steuerspannung führen.If the control voltage of a contactor is derived from one of the three phases, it can be sync effects between the closing or opening angle of the Main contacts in the load circuit and the AC control voltage lead.

Dies liegt daran, daß ein gewisser Spannungsaufbau der Versorgungsspannung für die Elektronik erfolgen muß.
Wird die Steuerspannung im Spannungsnullpunkt zugeschaltet, so baut sich die Versorgungsspannung nicht sofort auf, sondern erst zu einem späterem Zeitpunkt. Im Bereich dieses Zeitpunktes erfolgt eine unerwünschte Synchronisation, die zur Folge hat, daß immer eines der drei Schaltkontakte des Schützes einem höheren Verschleiß unterliegt. Das heißt, daß ein Kontakt einen Einschaltpunkt aufweist, bei dem die Spannungshöhe unabhängig vom Zeitpunkt des Steuersignals annähernd gleich ist. Da die Lebensdauer des Schützes von der Lebensdauer des am meist abgebranntesten Kontaktes abhängt, tritt durch die Synchronisation eine Verkürzung der Lebensdauer des Gesamtgerätes ein. This is due to the fact that a certain voltage build-up of the supply voltage for the electronics must be made.
If the control voltage is switched on at voltage zero, the supply voltage does not build up immediately, but only at a later point in time. In the range of this time, an unwanted synchronization, which has the consequence that always one of the three switching contacts of the contactor is subject to higher wear. That is, a contact has a switch-on point at which the voltage level is approximately equal regardless of the timing of the control signal. Since the life of the contactor depends on the life of the most burned contact, the synchronization will shorten the lifetime of the entire device.

Aufgabe der Erfindung ist es, ein Verfahren nach dem Oberbegriff des Anspruches 1 zu schaffen, bei dem die Lebensdauer eines Schützes erhöht wird.The object of the invention is a method according to the preamble of claim 1 to create, in which the life of a contactor is increased.

Die Aufgabe der Erfindung wird durch die kennzeichnenden Merkmale der unabhängigen Ansprüche gelöst, während in den Unteransprüchen besonders vorteilhafte Weiterbildungen der Erfindung gekennzeichnet sind.The object of the invention is characterized by the characterizing features of independent claims, while in the dependent claims particularly advantageous developments of the invention are characterized.

Durch die Erfindung wird ein ungleichmäßiger Abbrand der Schaltkontakte verhindert und somit die Lebensdauer des Schützes erhöht.The invention prevents uneven burning of the switching contacts and thus increases the life of the contactor.

Anhand der Zeichnung, in der ein Ausführungsbeispiel dargestellt ist, sollen die Erfindung, weitere Ausgestaltungen und Verbesserungen der Erfindung und weitere Vorteile näher beschrieben und erläutert werden.Reference to the drawing, in which an embodiment is shown, should the Invention, further refinements and improvements of the invention and others Advantages are described and explained in detail.

Es zeigt:

Fig. 1
ein Zeitdiagramm,
Fig. 2
ein Diagramm ohne Verzögerungszeit,
Fig. 3
eine Prinzipdarstellung,
Fig. 4
ein erstes Flußdiagramm und
Fig. 5
ein weiteres Flußdiagramm.
It shows:
Fig. 1
a time diagram,
Fig. 2
a diagram without delay time,
Fig. 3
a schematic diagram,
Fig. 4
a first flowchart and
Fig. 5
another flowchart.

Die Fig. 1 zeigt ein Zeitdiagramm, bei dem in einer unteren Kurve die gleichgerichtete Versorgungsspannung dargestellt ist, wobei die Versorgungsspannung eine Wechselspannung ist.Fig. 1 shows a timing diagram in which the rectified in a lower curve Supply voltage is shown, wherein the supply voltage a AC voltage is.

Nach dem Einschalten der Versorgungsspannung zum Zeitpunkt t0, der im Spannungsnulldurchgang gelegt ist, baut sich die Spannung der Elektronik erst nach 3 bis 5 ms auf. Nach diesem Spannungsaufbau, erfolgt ein Resetsignal für einen Microkontroller. Das Programm wird gestartet. Nach diesem Zeitpunkt t1 erfolgt eine Erkennung, in welchem Zustand das Schütz betrieben wird. Es wird überprüft um welche Ansteuerart es sich handelt. Die Ermittlung bezieht sich auf den konventionellen Betrieb, SPS-Betrieb oder leistungsarmen Betrieb. Diese Erkennung des Eingangs dauert etwa 5 ms, wobei das Ende der Erkennung mit t2 gekennzeichnet ist.
Steht ein Pegel an, dann wird der konventionelle Betrieb erkannt.After switching on the supply voltage at time t 0 , which is placed in the voltage zero crossing, the voltage of the electronics builds up after 3 to 5 ms. After this voltage build-up, a reset signal for a microcontroller takes place. The program is started. After this time t 1 , detection takes place in which state the contactor is operated. It is checked which type of tax is concerned. The determination relates to conventional operation, PLC operation or low-power operation. This detection of the input takes about 5 ms, with the end of the detection marked t 2 .
If a level is set, conventional operation is detected.

Nach diesen Zeitpunkt ist, um Synchronisationseffekte zu vermeiden, eine zufällig bestimmte Verzögerungszeit tx vorgesehen, die zwischen Null und der halben Periodendauer der Steuerspannung liegt.
Erst nach dieser Verzögerungszeit, wobei der Zeitpunkt mit t3 gekennzeichnet ist, wird die Versorgungsspannung gemessen, wobei die Versorgungsspannung, sowohl eine DC- als auch eine AC-Spannung sein kann. Dabei wird überprüft um welche Versorgungsspannung es sich handelt (AC oder DC). Gleichzeitig wird die Höhe der anliegenden Spannung ermittelt.
Weiterhin wird nach t3 geprüft, ob die Versorgungsspannung innerhalb eines vorgegebenen Spannungsfensters Umin, Umax liegt, d.h. ob der ermittelte Wert im zulässigen Bereich liegt.
Diese Vorgänge dauern etwa 12,5 ms an, wobei der Zeitpunkt t4, an dem der Schützantrieb aktiviert wird bzw. der Anzugvorgang eingeleitet wird, durch die Verzögerungszeit tx auf jedem beliebigen Punkt der Sinuskurve der Versorgungsspannung liegen kann. Die Zeit des Anzugvorgangs ist je nach Schutztyp verschieden.
Je nach Schütztyp erfolgt der Anzug nach 50 bis 100 ms.After this time, in order to avoid synchronization effects, a randomly determined delay time t x is provided, which lies between zero and half the period of the control voltage.
Only after this delay time, wherein the time is marked with t 3 , the supply voltage is measured, wherein the supply voltage, both a DC and an AC voltage can be. It is checked which supply voltage is concerned (AC or DC). At the same time, the height of the applied voltage is determined.
Furthermore, it is checked after t 3 whether the supply voltage is within a predetermined voltage window U min , U max , ie whether the determined value is within the permissible range.
These operations take about 12.5 ms, wherein the time t 4 at which the contactor drive is activated or the tightening process is initiated by the delay time t x can be on any point of the sine wave of the supply voltage. The time of the tightening process varies depending on the type of protection.
Depending on the type of protection, the suit will be carried out after 50 to 100 ms.

Der Schaltpunkt t5 der Kontakte verteilt sich auch für die anderen Phasen nach dem Zufallsprinzip, was eine gleichmäßige Beanspruchung der Schaltkontakte bewirkt.The switching point t 5 of the contacts is also distributed randomly for the other phases, which causes a uniform stress on the switching contacts.

Der unerwünschte Synchronisationseffekt wird anhand der Fig. 2 näher erläutert.
Die gestrichelten Linien zeigen verschiedene Einschaltpunkte, denen unterschiedliche Spannungswerte zugeordnet sein können. Da die Spannung zum Starten des Microkontrollers erst aufgebaut werden muß, liegt das Resetsignal nahezu unabhängig vom Einschaltzeitpunkt stets auf dem gleichen Punkt der Kurve, so daß die Einschaltzeitpunkte praktisch auf den gleichen Resetzeitpunkt synchronisiert werden.
Wird die Steuerspannung z.B. im Spannungsnullzeitpunkt zugeschaltet, so baut sich die Versorgungsspannung für die Elektronik nicht sofort auf.The undesirable synchronization effect will be explained in more detail with reference to FIG.
The dashed lines show different switch-on points, to which different voltage values can be assigned. Since the voltage for starting the microcontroller must first be established, the reset signal is almost always independent of the switch-on time on the same point of the curve, so that the switch-on times are practically synchronized to the same reset time.
If the control voltage is switched on, for example, at zero voltage, the supply voltage for the electronics does not build up immediately.

Durch das erläuterte Verfahren werden unerwünschte Synchronisationseffekte zwischen dem Schließwinkel bzw. Öffnungswinkel der Hauptkontakte im Lastkreis vermieden.By the method explained become undesirable synchronization effects between the closing angle or opening angle of the main contacts in the load circuit avoided.

Zur Realisierung eines Zeitgliedes mit einer variabel, zufällig eingestellten Zeit wird ein Zufallsgenerator benötigt. Der vom Zufallsgenerator gelieferte Wert wird anschließend so bearbeitet, daß sich mit der anschließenden Bearbeitung des Wertes eine Zeit von Null bis maximal der halben Periodendauer der Steuerspannung ergibt.To realize a timer with a variable, randomly set time is Random generator needed. The value provided by the random number generator then becomes edited so that with the subsequent processing of the value a time of Zero to a maximum of half the period of the control voltage results.

Einen zufälligen Wert kann man durch zwei Möglichkeiten erhalten.
Fig. 3 zeigt eine Prinzipdarstellung. A random value can be obtained in two ways.
Fig. 3 shows a schematic diagram.

Bei der ersten Möglichkeit wird ein Wert in einer RAM Speicherstelle im Microkontroller ausgelesen, wobei der Inhalt dieser Zelle nach Spannungszuschaltung nicht definiert ist.
Die Fig. 4 zeigt das zugehörigen Ablaufdiagramm zur Realisierung mit einem RAM.In the first possibility, a value is read out in a RAM memory location in the microcontroller, wherein the content of this cell is not defined after power connection.
4 shows the associated flow chart for implementation with a RAM.

Bei der zweiten Möglichkeit erhält man aus einer Speicherzelle 1 eines EEPROM einen Wert, der entsprechend manipuliert wird. Der alte Wert wird zur Ermittlung des neuen Wertes herangezogen. Der alte Wert wird .dann durch den neuen Wert im EEPROM ersetzt.
Anschließend wird der manipulierte Wert in ein Register 2 geschrieben. Der Timer wird anschließend gestartet. Wenn der Timer den Wert Null erreicht, dann entsteht ein Timer underflow, der an die CPU weitergegeben wird, und das Programm wird fortgefahren.
Die Fig. 5 zeigt das entsprechende Flußdiagramm.In the second possibility, a value is obtained from a memory cell 1 of an EEPROM, which is manipulated accordingly. The old value is used to determine the new value. The old value is then replaced by the new value in the EEPROM.
Subsequently, the manipulated value is written in a register 2. The timer is then started. When the timer reaches zero, a timer underflow will be generated, which will be passed to the CPU, and the program will continue.
Fig. 5 shows the corresponding flowchart.

Durch diese zusätzliche Zeitschleife werden die Schließ- und Öffnungswinkel der Hauptkontakte gegenüber der Steuerspannung nicht synchronisiert.This additional time loop, the closing and opening angle of the Main contacts not synchronized with the control voltage.

Claims (13)

  1. Method for effecting an electronic drive control of a drive coil of a contactor which comprises main contacts for load current and an electronics featuring a micro controller,
    wherein a delay time (tx) which is selected at random and which varies constantly exists, characterized in that
    the delay time (tx) lies after the instant (t1,t2) at which the supply voltage has built up at the electronics, and before the instant (t3) at which the supply voltage is measured.
  2. Method according to claim 1, characterized in that the delay time (tx) lies between zero and half the period duration of the control voltage.
  3. Method according to one of the preceding claims, characterized in that at a previous instant (t1), the type of control is detected in which the contactor is operated, the delay time (tx) lying after an instant (t2) only at which the detection is completed.
  4. Method according to claim 3, characterized in that the detection refers to conventional operation, PLC operation or low-power operation.
  5. Method according to claim 4, characterized in that the detection takes approximately 5 ms.
  6. Method according to one of the preceding claims, characterized in that after the delay time (tx), at a subsequent instant (t3), the supply voltage is verified with respect to AC or DC operation.
  7. Method according to one of the preceding claims, characterized in that after the delay time (tx), it is verified at a subsequent instant (t3) whether the supply voltage lies within a predetermined voltage window (Umin, Umax).
  8. Method according to one of the preceding claims, characterized in that at a later instant (t4) lying after 10 - 15 ms, preferably after 12.5 ms, the contactor drive is activated, and the pickup process is initiated.
  9. Method according to one of the preceding claims, characterized in that a timing element is provided, working as a random generator for realizing the delay time (tx), the value delivered by the random generator being subsequently processed in such a manner that, via the subsequent processing of the value, a time from zero to maximally half the period duration of the control voltage results.
  10. Method according to one of the preceding claims, characterized in that a value to be associated with the delay time (tx) is read out in a RAM storage location in the micro controller, the content of this cell subsequent to switching on the voltage being undefined.
  11. Method according to claim 10, characterized in that the manipulated value is subsequently written into a register as a timer; that the timer is subsequently started and that, when the timer reaches the value zero, then a timer underflow ensues which is forwarded to a CPU, a program then being continued.
  12. Method according to one of the preceding claims, characterized in that a value is read in from a storage cell (1) of an EEPROM, which value is manipulated with the old value being utilized for determining the new value, and the old value then being replaced with the new value in the EEPROM.
  13. Method according to one of the preceding claims, characterized in that the supply voltage is measured and checked.
EP00951390A 1999-07-26 2000-07-15 Method for effecting an electronic drive control Expired - Lifetime EP1198808B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19935044 1999-07-26
DE19935044A DE19935044A1 (en) 1999-07-26 1999-07-26 Electronic drive control method
PCT/EP2000/006774 WO2001008181A1 (en) 1999-07-26 2000-07-15 Method for effecting an electronic drive control

Publications (2)

Publication Number Publication Date
EP1198808A1 EP1198808A1 (en) 2002-04-24
EP1198808B1 true EP1198808B1 (en) 2003-10-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP00951390A Expired - Lifetime EP1198808B1 (en) 1999-07-26 2000-07-15 Method for effecting an electronic drive control

Country Status (8)

Country Link
US (1) US6671157B1 (en)
EP (1) EP1198808B1 (en)
JP (1) JP2003505840A (en)
AT (1) ATE251332T1 (en)
AU (1) AU6434700A (en)
DE (2) DE19935044A1 (en)
ES (1) ES2208389T3 (en)
WO (1) WO2001008181A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005043895A1 (en) * 2005-09-14 2007-03-15 Siemens Ag Operation of electromechanical switchgear, awaits particular phase angle following control signal, permits delay time to elapse, then operates drive
DE102006014914B3 (en) * 2006-03-30 2007-10-04 Siemens Ag Electromechanically operated switchgear operating method, involves supplying supply voltage to electromechanical drive and controlling drive by control device, where supply voltage is alternating voltage or rectified alternating voltage

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR112014029173A2 (en) 2012-05-30 2017-06-27 Abb Research Ltd method and device for switching a contactor
EP3422382B1 (en) * 2017-06-28 2020-03-25 ABB Schweiz AG Method and control device for switching a contactor

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DE3110314A1 (en) * 1980-07-31 1982-04-01 LGZ Landis & Gyr Zug AG, 6301 Zug System and device for operating an electromagnet
JPS632219A (en) 1986-06-20 1988-01-07 株式会社東芝 Relay driving circuit
EP0571122B1 (en) 1992-05-20 1998-08-12 Texas Instruments Incorporated Method and apparatus for enhancing relay life
US5377068A (en) * 1992-10-19 1994-12-27 Predator Systems Inc. Electromagnet with holding control
US5442511A (en) * 1993-03-30 1995-08-15 Caterpillar Inc. Generic solenoid driver circuit board, circuit and method of making same
US5914849A (en) * 1994-04-26 1999-06-22 Kilovac Corporation DC actuator control circuit with voltage compensation, current control and fast dropout period
US5838077A (en) 1995-07-12 1998-11-17 Pittway Corporation Control system for switching loads on zero crossing
SE505747C2 (en) * 1996-02-07 1997-10-06 Asea Brown Boveri Contactor
US6249418B1 (en) * 1999-01-27 2001-06-19 Gary Bergstrom System for control of an electromagnetic actuator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005043895A1 (en) * 2005-09-14 2007-03-15 Siemens Ag Operation of electromechanical switchgear, awaits particular phase angle following control signal, permits delay time to elapse, then operates drive
DE102005043895B4 (en) * 2005-09-14 2007-07-26 Siemens Ag Method for operating an electromechanically actuated switching device and operated according to this method switching device
DE102006014914B3 (en) * 2006-03-30 2007-10-04 Siemens Ag Electromechanically operated switchgear operating method, involves supplying supply voltage to electromechanical drive and controlling drive by control device, where supply voltage is alternating voltage or rectified alternating voltage

Also Published As

Publication number Publication date
AU6434700A (en) 2001-02-13
WO2001008181A1 (en) 2001-02-01
ES2208389T3 (en) 2004-06-16
EP1198808A1 (en) 2002-04-24
DE19935044A1 (en) 2001-02-01
ATE251332T1 (en) 2003-10-15
DE50003920D1 (en) 2003-11-06
US6671157B1 (en) 2003-12-30
JP2003505840A (en) 2003-02-12

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