DE4242432A1 - Control of electromagnetic valve, solenoid rotary electromagnet or relay - Google Patents
Control of electromagnetic valve, solenoid rotary electromagnet or relayInfo
- Publication number
- DE4242432A1 DE4242432A1 DE19924242432 DE4242432A DE4242432A1 DE 4242432 A1 DE4242432 A1 DE 4242432A1 DE 19924242432 DE19924242432 DE 19924242432 DE 4242432 A DE4242432 A DE 4242432A DE 4242432 A1 DE4242432 A1 DE 4242432A1
- Authority
- DE
- Germany
- Prior art keywords
- valve
- signal
- time
- current
- solenoid
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
- H01F7/1844—Monitoring or fail-safe circuits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
- H01F7/1844—Monitoring or fail-safe circuits
- H01F2007/1861—Monitoring or fail-safe circuits using derivative of measured variable
-
- 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
- H01H2047/008—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current with a drop in current upon closure of armature or change of inductance
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Ansteuern ei nes Elektromagnetventils, eines Hubmagneten, eines Drehmagneten oder eines Relais.The invention relates to a method for driving egg Nes solenoid valve, a solenoid, one Rotary magnet or a relay.
Zur genauen Einstellung z. B. eines bestimmten Unter druckes, ist es erforderlich, daß ein Ventil für eine exakte Zeit geöffnet wird. Dazu wird das Ventil durch Anlegen einer Spannung eingeschaltet und nach einer vorgegebenen Zeit wieder ausgeschaltet. Dabei setzt sich die Einschaltzeit aus einem Anteil der zum Strom aufbau bis zum Beginn der Ankerbewegung reicht und ei ner Zeit der Bewegung des Ankers zusammen. Bei den be kannten Ventilen beträgt die Zeit zum Stromaufbau (12 Voltbetrieb) ca. 8 msec. Die Ankerbewegung ist in ca. 2 msec. abgeschlossen. Die Dauer des Stromaufbaus ist von der Spannung, der Zeitkonstante des Ventils und dem Stromwert bei dem die Ankerbewegung einsetzt ab hängig. Da diese Einflußgrößen z. B. in Automobilen großen Variationen unterliegen (z. B. Spannung 8 Volt bis 16 Volt, Temperatur -40°C bis +85°C, Wick lungswiderstand + -20% usw.), ändert sich die Strom aufbauzeit in weiten Grenzen z. B. von 4 bis 12 msec. Wenn das Ventil nun beispielsweise für 10 msec. ange steuert wird, so ist es möglich, daß es nicht öffnet oder aber für eine relativ unbestimmte Zeit geöffnet ist. Der einzusteilende Unterdruck ist also in breiten Grenzen undefiniert. Daneben steht bei den bisher be kannten Ventilen auch kaum eine Möglichkeit, eine Fehlfunktion zu erkennen.For exact setting z. B. a specific sub pressure, it is necessary that a valve for a exact time is opened. For this, the valve is through Applying a voltage turned on and after a set time again. Doing so the turn-on time is made up of a percentage of the electricity build up to the beginning of the anchor movement and egg time of moving the anchor together. With the be valves, the time to build up the current (12 Voltage operation) approx. 8 msec. The anchor movement is in approx 2 msec. completed. The duration of the electricity build-up is of the voltage, the time constant of the valve and the current value at which the armature movement starts pending. Since these influencing factors such. B. in automobiles large variations are subject (e.g. voltage 8 volts up to 16 volts, temperature -40 ° C to + 85 ° C, wick resistance + -20% etc.), the current changes construction time within wide limits e.g. B. from 4 to 12 msec. If the valve is now, for example, for 10 msec. attached is controlled, it may not open or open for a relatively indefinite period is. The vacuum to be divided is therefore wide Boundaries undefined. In addition, the so far be knew valves hardly any way, one Detect malfunction.
Es ist daher Aufgabe der Erfindung, ein Verfahren der eingangs genannten Art so zu verbessern, daß ein Ven til für eine möglichst kurze Zeit definiert und exakt geöffnet und wieder geschlossen wird. Dabei soll das Verfahren einfach einsetzbar sein und zuverlässig und exakt funktionieren.It is therefore an object of the invention to provide a method of type mentioned so that a Ven til defined and precise for the shortest possible time opened and closed again. It should Process can be used easily and reliably and work exactly.
Die Lösung der Aufgabe gelingt mit den im kennzeich nenden Teil des Anspruchs 1 angegebenen Merkmalen. Eine spezielle Ausgestaltung zeigt Anspruch 2 und 3. Die Fehlerüberwachung ist im Anspruch 4 angegeben.The task is solved with the in the characteristic nenden part of claim 1 specified features. A special embodiment is shown in claims 2 and 3. The fault monitoring is specified in claim 4.
Das erfindungsgemäße Verfahren zum Ansteuern beruht auf dem Effekt, daß, sobald sich der Anker bewegt auf grund der magnetischen Flußänderung eine Induktions spannung entsteht, die dem Anstieg des Stromes entge genwirkt. Der Stromanstieg wird kleiner und kann sogar negativ werden, wenn die Flußänderung sehr schnell ist. Am Ende der Ankerbewegung steigt der Strom wieder wie vorher an und nähert sich dem Endwert.The control method according to the invention is based on the effect that once the anchor moves on an induction due to the magnetic flux change voltage arises, which counteracts the increase in current acted. The current rise becomes smaller and can even become negative if the flow change very quickly is. At the end of the anchor movement, the current rises again as before and approaches the final value.
Die Auswerteeinrichtung überwacht also den Ventilstrom daraufhin, ob die Ventilstromänderung (dI/dt) Null oder negativ wird. Ist dies der Fall, dann wird ein erstes Signal gegeben, ab dem eine vorgegebene Zeit spanne zu laufen beginnt. Bleibt das erste Signal weg, wird nach Überschreiten der vorgegebenen Zeit ein Feh lersignal gegeben.The evaluation device thus monitors the valve current then whether the valve current change (dI / dt) is zero or becomes negative. If this is the case, then a given the first signal from which a predetermined time span starts to run. If the first signal is missing, becomes a mistake after exceeding the specified time given signal.
Die Erfindung soll an einem Ausführungsbeispiel näher dargestellt werden.The invention is to be closer to an embodiment being represented.
Es zeigt It shows
Fig. 1 ein Schema zum Einstellen des Unterdruckes in einer Druckdose, welche über ein Elektroma gnetventil angesteuert wird, das von einem Mi krokontroller überwacht wird Fig. 1 is a diagram for setting the negative pressure in a pressure can, which is controlled by an electromagnetic solenoid valve, which is monitored by a microcontroller
Fig. 2 zeigt ebenfalls schematisch eine andere Aus führung einer Ansteuerung einer Druckdose Fig. 2 also schematically shows another implementation of a control of a pressure cell
Fig. 3 zeigt den zeitlichen Verlauf des Ventilstro mes. Fig. 3 shows the time course of the Ventilstro mes.
In Fig. 1 ist die Druckdose mit 1 bezeichnet. Sie wird von einem Elektromagnetventil 2 gesteuert, wel ches für einen genauen Zeitraum den Unterdruckanschluß auf den Umgebungsdruck umschaltet. Ein Mikrokontroller 3 schaltet dazu den Schalter 4, welcher den Magnetan ker 5 bestromt.In Fig. 1, the pressure cell is designated 1 . It is controlled by a solenoid valve 2, which switches the vacuum connection to the ambient pressure for a precise period. A microcontroller 3 switches the switch 4 , which energizes the Magnetan ker 5 .
In Fig. 2 wird der elektrische Strom in der Ventil spule des Magnetankers 5 durch einen elektrischen Wi derstand 6 in eine proportionale Spannung umgesetzt, welche von einem Differenzierer 7 differenziert und eventuell verstärkt und einem Komparator 8 mit Hy terese zugeführt wird. Der Komparator 8 formt daraus ein Rechtecksignal, dessen Flanke der Mikrokontroller 3 auswertet und ab diesem Signal die Abschaltzeit er rechnet und ein entsprechendes Steuersignal gibt.In Fig. 2, the electric current in the valve coil of the armature 5 is converted by an electrical resistance 6 into a proportional voltage, which is differentiated by a differentiator 7 and possibly amplified and fed to a comparator 8 with hy teresis. The comparator 8 forms a square wave signal, the edge of which the microcontroller 3 evaluates and from this signal the switch-off time it calculates and gives a corresponding control signal.
In Fig. 3 ist zu sehen, wie der Ventilstrom über der Zeit verläuft. Nachdem der Mikrokontroller das Ventil eingeschaltet hat, wartet er auf die Flanke des Kompa ratorsignal, d. h. er überwacht die Ventilstromän derung (dI/dt) darauf, daß sie Null oder negativ wird, ab da wird ein erstes Signal 9 gegeben, von dem ab eine vorgegebene Zeitspanne zu laufen beginnt, nach deren Ablauf der Ventilstrom abgeschaltet wird. Bleibt hingegen das erste Signal 9 aus, wird ein Fehlersignal gegeben.In Fig. 3 as the valve current is seen running over time. After the microcontroller has switched on the valve, it waits for the edge of the comparator signal, ie it monitors the valve current change (dI / dt) to ensure that it becomes zero or negative, from which a first signal 9 is given, from which one predetermined period of time begins to run, after which the valve current is switched off. If, however, the first signal 9 fails to appear, an error signal is given.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19924242432 DE4242432A1 (en) | 1992-12-16 | 1992-12-16 | Control of electromagnetic valve, solenoid rotary electromagnet or relay |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19924242432 DE4242432A1 (en) | 1992-12-16 | 1992-12-16 | Control of electromagnetic valve, solenoid rotary electromagnet or relay |
Publications (1)
Publication Number | Publication Date |
---|---|
DE4242432A1 true DE4242432A1 (en) | 1994-06-23 |
Family
ID=6475407
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19924242432 Withdrawn DE4242432A1 (en) | 1992-12-16 | 1992-12-16 | Control of electromagnetic valve, solenoid rotary electromagnet or relay |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE4242432A1 (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19524755A1 (en) * | 1995-07-07 | 1997-01-09 | Horst Bendrich | Switch magnets stroke-monitoring device for electromagnetically operated switch - delivers binary signal denoting travel of armature on basis of derivative of coil current drawn through low-impedance transformer winding. |
WO2009105410A1 (en) * | 2008-02-22 | 2009-08-27 | Baxter International Inc. | Medical fluid machine having solenoid control system with reduced hold current |
US7746620B2 (en) | 2008-02-22 | 2010-06-29 | Baxter International Inc. | Medical fluid machine having solenoid control system with temperature compensation |
WO2011080010A1 (en) * | 2009-12-29 | 2011-07-07 | Robert Bosch Gmbh | Starter having engagement detection functionality |
US8027572B2 (en) | 2008-02-22 | 2011-09-27 | Baxter International Inc. | Dialysis machine having multiple line voltage heater |
US8403880B2 (en) | 2002-05-24 | 2013-03-26 | Baxter International Inc. | Peritoneal dialysis machine with variable voltage input control scheme |
EP2650517A1 (en) * | 2012-04-11 | 2013-10-16 | TI Automotive Fuel Systems SAS | Method for monitoring a fluid injection system and system thereof |
WO2013189527A1 (en) * | 2012-06-20 | 2013-12-27 | Siemens Aktiengesellschaft | Monitoring an electromagnetic relay |
US9435459B2 (en) | 2009-06-05 | 2016-09-06 | Baxter International Inc. | Solenoid pinch valve apparatus and method for medical fluid applications having reduced noise production |
CN109541349A (en) * | 2018-11-29 | 2019-03-29 | 汽解放汽车有限公司 | Proportion magnetic valve on-line performance detection method and proportion magnetic valve on-line performance detection device |
WO2023241974A1 (en) * | 2022-06-13 | 2023-12-21 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Monitoring device for a solenoid valve of a compressed-air system of a vehicle, system composed of the solenoid valve, the monitoring device and a control device, and method for monitoring the solenoid valve |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2100837A1 (en) * | 1971-01-09 | 1972-07-20 | Kayser Lutz Tilo | Electronic circuit arrangement |
EP0242402A1 (en) * | 1985-10-11 | 1987-10-28 | Mitsubishi Mining & Cement Co., Ltd. | Device for confirming operation of electromagnetic actuator |
DE3817770A1 (en) * | 1988-05-26 | 1989-11-30 | Daimler Benz Ag | Device for the timed operation of an electromagnetic valve |
DE4020094A1 (en) * | 1990-06-23 | 1992-01-02 | Bosch Gmbh Robert | METHOD AND DEVICE FOR CONTROLLING AN ELECTROMAGNETIC CONSUMER |
EP0499419A2 (en) * | 1991-02-09 | 1992-08-19 | Imi Norgren Limited | Armature movement detection circuit |
-
1992
- 1992-12-16 DE DE19924242432 patent/DE4242432A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2100837A1 (en) * | 1971-01-09 | 1972-07-20 | Kayser Lutz Tilo | Electronic circuit arrangement |
EP0242402A1 (en) * | 1985-10-11 | 1987-10-28 | Mitsubishi Mining & Cement Co., Ltd. | Device for confirming operation of electromagnetic actuator |
DE3817770A1 (en) * | 1988-05-26 | 1989-11-30 | Daimler Benz Ag | Device for the timed operation of an electromagnetic valve |
DE4020094A1 (en) * | 1990-06-23 | 1992-01-02 | Bosch Gmbh Robert | METHOD AND DEVICE FOR CONTROLLING AN ELECTROMAGNETIC CONSUMER |
EP0499419A2 (en) * | 1991-02-09 | 1992-08-19 | Imi Norgren Limited | Armature movement detection circuit |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19524755A1 (en) * | 1995-07-07 | 1997-01-09 | Horst Bendrich | Switch magnets stroke-monitoring device for electromagnetically operated switch - delivers binary signal denoting travel of armature on basis of derivative of coil current drawn through low-impedance transformer winding. |
US8403880B2 (en) | 2002-05-24 | 2013-03-26 | Baxter International Inc. | Peritoneal dialysis machine with variable voltage input control scheme |
US9504778B2 (en) | 2002-05-24 | 2016-11-29 | Baxter International Inc. | Dialysis machine with electrical insulation for variable voltage input |
WO2009105410A1 (en) * | 2008-02-22 | 2009-08-27 | Baxter International Inc. | Medical fluid machine having solenoid control system with reduced hold current |
US7746620B2 (en) | 2008-02-22 | 2010-06-29 | Baxter International Inc. | Medical fluid machine having solenoid control system with temperature compensation |
US7782590B2 (en) | 2008-02-22 | 2010-08-24 | Baxter International Inc. | Medical fluid machine having solenoid control system with reduced hold current |
US8027572B2 (en) | 2008-02-22 | 2011-09-27 | Baxter International Inc. | Dialysis machine having multiple line voltage heater |
US8160433B2 (en) | 2008-02-22 | 2012-04-17 | Baxter International, Inc. | Dialysis machine having multi-input voltage capable heater |
US8644692B2 (en) | 2008-02-22 | 2014-02-04 | Baxter International Inc. | Method for heating medical fluid using multi-input voltage capable heater |
US9435459B2 (en) | 2009-06-05 | 2016-09-06 | Baxter International Inc. | Solenoid pinch valve apparatus and method for medical fluid applications having reduced noise production |
US9782577B2 (en) | 2009-06-05 | 2017-10-10 | Baxter International Inc. | Solenoid pinch valve apparatus and method for medical fluid applications having reduced noise production |
WO2011080010A1 (en) * | 2009-12-29 | 2011-07-07 | Robert Bosch Gmbh | Starter having engagement detection functionality |
US8884450B2 (en) | 2009-12-29 | 2014-11-11 | Robert Bosch Gmbh | Starter having engagement detection function |
EP2650517A1 (en) * | 2012-04-11 | 2013-10-16 | TI Automotive Fuel Systems SAS | Method for monitoring a fluid injection system and system thereof |
WO2013189527A1 (en) * | 2012-06-20 | 2013-12-27 | Siemens Aktiengesellschaft | Monitoring an electromagnetic relay |
CN109541349A (en) * | 2018-11-29 | 2019-03-29 | 汽解放汽车有限公司 | Proportion magnetic valve on-line performance detection method and proportion magnetic valve on-line performance detection device |
WO2023241974A1 (en) * | 2022-06-13 | 2023-12-21 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Monitoring device for a solenoid valve of a compressed-air system of a vehicle, system composed of the solenoid valve, the monitoring device and a control device, and method for monitoring the solenoid valve |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
8127 | New person/name/address of the applicant |
Owner name: FTE AUTOMATIVE GMBH, 96106 EBERN, DE |
|
8130 | Withdrawal |