EP1403885A2 - Appareil de commande pour une bobine magnétique - Google Patents

Appareil de commande pour une bobine magnétique Download PDF

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Publication number
EP1403885A2
EP1403885A2 EP03020543A EP03020543A EP1403885A2 EP 1403885 A2 EP1403885 A2 EP 1403885A2 EP 03020543 A EP03020543 A EP 03020543A EP 03020543 A EP03020543 A EP 03020543A EP 1403885 A2 EP1403885 A2 EP 1403885A2
Authority
EP
European Patent Office
Prior art keywords
voltage
coil
current
control device
switch
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Withdrawn
Application number
EP03020543A
Other languages
German (de)
English (en)
Other versions
EP1403885A3 (fr
Inventor
Alfred Sinner
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.)
Karl Dungs GmbH and Co KG
Original Assignee
Karl Dungs GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Karl Dungs GmbH and Co KG filed Critical Karl Dungs GmbH and Co KG
Publication of EP1403885A2 publication Critical patent/EP1403885A2/fr
Publication of EP1403885A3 publication Critical patent/EP1403885A3/fr
Withdrawn legal-status Critical Current

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    • 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
    • H01F7/1805—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current
    • H01F7/1811—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current demagnetising upon switching off, removing residual magnetism
    • 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

Definitions

  • the invention relates to a control device for a magnetic coil and a method for supplying a magnetic coil with current.
  • FIG. 7 Such a circuit known per se is illustrated in FIG. 7.
  • the magnet coil L is connected with its free-wheeling diode D to a rectifier bridge G, which generates a rippled DC voltage from a mains voltage U N.
  • a transistor T and a current sensor resistor R are connected in series with the coil L.
  • the transistor T is controlled by a control circuit S such that the current through the coil L is switched off when it has reached its peak value. The current is switched on again when the operating voltage has passed its zero crossing.
  • FIGS. 2 and 3 illustrate the ripple voltage U at low mains voltage.
  • the switch T is always by the control circuit S shortly after the zero crossing switched on at time t 0 , t 1 until the current has reached its maximum value I max .
  • the current increases up to its maximum value.
  • the switch T is now switched off by the control circuit S, after which it subsides again, as the dashed part of the curve I 1 shows.
  • the resulting effective value is I eff1 .
  • FIG. 3 illustrates the same process with a larger input voltage U 2 .
  • the resulting current is symbolized by curve I 2 .
  • the rise in current is much steeper than illustrated in FIG. 2 due to the higher mains voltage.
  • the maximum value I max is accordingly reached earlier.
  • the transistor T is thus switched off earlier, after which the current, as the dashed part of the curve I 2 illustrates, decays as a freewheeling current through the diode D.
  • the decay time is much greater with a larger mains voltage according to U 2 in FIG. 3 than with a lower mains voltage U 1 in FIG. 2.
  • the resulting effective value I eff2 of the current is thus lower. This means that the circuit according to FIG. 7 supplies changing coil currents when the input voltages change.
  • the control device contains a controlled switch via which the magnetic coil periodically is connected to a voltage source.
  • a current detection device is used to detect the current supplied by the voltage source into the magnet coil, ie the coil charging current.
  • the timer is started.
  • the timer is started when the power is switched on. This now switches off the switch via which the solenoid is supplied with current after a time delay, which in turn depends on the size of the input voltage. This makes it possible to set shorter coil charging times for larger input voltages and larger coil charging times for smaller input voltages.
  • the relationship between the coil charging time and the input voltage differs significantly from the relationship that results in a circuit according to FIG.
  • the possibility is now created to set the time delay after reaching the threshold value in such a way that the same rms current values occur at the solenoid coil even with different input voltages.
  • the charging time of the coil is controlled in dependence on the pulsating DC voltage (operating voltage) in such a way that the charging and discharging curve of the coil current has a constant time integral for all applied operating voltage values.
  • This can also be achieved without current detection if the timer is started each time the coil current is switched on.
  • the charging current is switched on synchronously with the respectively arriving voltage minima.
  • the switch-off does not take place after a specified (operating voltage-dependent) charging time but when a maximum current is reached.
  • the value of the maximum current which characterizes the switch-off current, is again determined as a function of voltage. With a suitable relationship between the current I maX serving as the switch-off limit and the operating voltage, a constant current-time integral results.
  • FIGS. 1 to 6 of the drawing Details of advantageous embodiments of the invention emerge from FIGS. 1 to 6 of the drawing, the associated description and subclaims.
  • a solenoid L and its control device 1 are illustrated according to the invention.
  • the magnet coil L is, for example, the magnet coil of a train drive for opening and closing a valve or another actuator.
  • the control device 1 serves to apply a defined coil current to the solenoid L when a mains voltage U N is present.
  • a rectifier bridge G is connected to the mains voltage U N , which turns the applied sine AC voltage into a pulsating DC voltage U 1 .
  • the time course of the same is illustrated, for example, in FIG. 2.
  • the rectifier bridge G is connected to one end of the magnet coil L, the other end of which is in turn connected to the rectifier bridge G via a controlled switch 3 in the form of a transistor T and a current sensor resistor R.
  • the transistor T is controlled by a drive circuit 4, which has a current sensor input 5 and a voltage sensor input 6.
  • the control circuit 4 is designed such that it switches the transistor T on shortly after passing a zero crossing of the operating voltage U N and switches it off again in a special way. For this purpose, the control circuit 4 monitors the voltage drop across the current sensor resistor R, which characterizes the coil charging current. For this purpose, reference is made to FIG. 2 and in particular the curve for the coil current I 2 .
  • the control circuit 4 detects a voltage at the voltage sensor input 6, which triggers the transistor T to be switched on. From this point in time, the control circuit monitors the increasing coil current I 2 with the current sensor input 5. As soon as it has reached a threshold value I s that is significantly smaller than the desired peak value, the control circuit 4 starts a timer (timer) which defines a time delay ⁇ t 1 . After this time delay ⁇ t 1 has elapsed, the transistor T is switched off. The current I 2 reaches its peak value at this point in time.
  • FIG. 3 illustrates the situation with a much larger input voltage.
  • the control circuit 4 switches on the transistor T.
  • the current increase which is illustrated here by curve I 2 (FIG. 3) is considerably steeper than in FIG. 2.
  • the threshold value I s is therefore reached after a relatively short time. Due to the now rising voltage U N , the control circuit or its time circuit now defines a significantly shorter switch-on time ⁇ t 2 .
  • the current reaches its peak value I max ⁇ With the expiry of the time delay ⁇ t 2 the transistor T is switched off and the current commutates to the diode D.
  • the falling dashed branch of the curve I 2 in FIG. 3 results.
  • the effective value I eff2 corresponds to the effective value I eff1 if the time delay ⁇ t 2 has been chosen to be sufficiently short is.
  • FIGS. 4 and 5 illustrate the control circuit 4 as a block diagram. It contains a circuit block 7 for direct control of the transistor T.
  • the circuit block 7 has an input 8 for switching on the transistor T and an input 9 for switching off the transistor T. Its output 11 is connected to the transistor T.
  • a comparator or trigger circuit 12 is connected upstream of the input 8, the input of which forms the voltage sensor input 6 of the control circuit 4. If the input voltage detected here exceeds a minimum value, the circuit block 7 receives a switch-on pulse.
  • a trigger circuit 14 is also connected to the current sensor input 5 and supplies a pulse at its output when the voltage generated by the current sensor resistor R is greater than a threshold value.
  • a timer circuit 15 is connected to the trigger circuit 14, which allows a defined delay time to expire until it transmits the signal received at the input to its output, which is connected to the input 9.
  • the timing circuit 15 has a control input 16 which is connected to the voltage sensor input 6. The voltage present at the control input 16 determines the delay time of the time circuit 15 in the manner illustrated in FIG. 6. The greater the voltage applied, the smaller the delay time defined by the time circuit 15. As shown in FIG. 6, the relationship can be linear.
  • the trigger circuits 12, 14 together form a switch-on device for the transistor T and the timer circuit 15.
  • the trigger circuit 14 is the switch-on device for the timer circuit 15.
  • FIG. 5 shows the circuit implementation of the circuit block 7 of the trigger circuits 12, 14 and the time circuit 15.
  • FIG. 5 shows the circuit implementation of the circuit block 7 of the trigger circuits 12, 14 and the time circuit 15.
  • the circuit block 7 is formed by an RS flip-flop, the set input E (input 8) of which is connected to the output of an operational amplifier which belongs to the trigger circuit 12.
  • the inverting input of the same taps off a reference voltage via a voltage divider R1, R2. He compares this with a voltage derived from the voltage U N via a voltage divider R3, R4, which is present at its non-inverting input.
  • the output of the operational amplifier is ground or negative and a set signal is supplied to the input 8 of the circuit block 7. In this way, a signal is generated in the vicinity of the zero crossing of the voltage U N , which is positive at the output 11 and turns on the transistor T.
  • the current sensor input 5 is formed by the non-inverting input of a further operational amplifier, which forms the core of the trigger circuit 14. Its negative input lies at the voltage divider point of the voltage divider formed from the resistors R1, R2. Its positive input is connected to the resistor R and forms the current sensor input. As soon as the voltage across the resistor R is greater than that at the voltage divider point, the output of the operational amplifier becomes positive.
  • the timing circuit 15 is formed by a capacitor C which is connected to the voltage UN via a resistor R z .
  • a diode D1 which is polarized in the direction of flow, connects the connection point between the resistor R z and the capacitor C to the output of the operational amplifier of the trigger circuit 14.
  • a trigger block 17 is connected here, the output of which forms the output of the time circuit 15 and is connected to the input 9 ,
  • the current through the resistor R is low, so that the voltage drop is less than the potential at the voltage divider point of the voltage divider R1 / R2, the current coming through the resistor RZ flows through the diode D1 into the output of the trigger circuit 14. As soon as the voltage is on However, the current sensor resistance R becomes larger than at the voltage divider point R1 / R2, the output of the trigger circuit 14 positive and the diode D1 blocks. The capacitor is now charged. After a charging time, which depends on the size of the charging current flowing through the resistor RZ, a voltage is reached which causes the subsequent trigger block 17 to tilt and switches off the transistor T via the circuit block 7. The greater the voltage UN, the faster the capacitor C is charged, ie the shorter the time ⁇ t 1 or ⁇ t 2 specified by the time circuit 15.
  • a modified design of the control circuit 4 is possible insofar as it can do without a current detection device.
  • the timing circuit can be started by the switch-on pulse of the RS flip-flop, as a result of which the charging time of the coil L is completely and solely determined by the timing circuit 15.
  • the possibility is provided to do without a timer.
  • the threshold value which the trigger circuit 14 receives and which normally defines the current at which the timer circuit 15 is to be started is variably determined depending on the operating voltage. This can be done by connecting the inverting input of the trigger circuit 14 to a voltage divider which is connected to the output of the rectifier circuit G.
  • the current peak value at which the transistor T is switched off can be determined in proportion to the voltage, in order to avoid a drop in the coil current at higher voltages or an excessive increase in the coil current at lower voltages.
  • a control device for a magnetic coil has a control circuit that has both the instantaneous value the voltage applied to the coil and the instantaneous value of the coil charging current. If this one threshold value is reached, a time circuit 15 is started, the time delay of which is influenced by the applied voltage U N. The greater the voltage, the smaller the time delay of the time circuit 15.
  • the control circuit 4 switches off the coil charging current as soon as the delay time specified by the time circuit has expired.
  • the coil current now commutates to a free-wheeling diode.
  • the control circuit 4 switches the coil charging current via the transistor T only in the vicinity of the zero crossing of the supply voltage.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electronic Switches (AREA)
  • Magnetically Actuated Valves (AREA)
EP03020543A 2002-09-25 2003-09-17 Appareil de commande pour une bobine magnétique Withdrawn EP1403885A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2002144522 DE10244522B4 (de) 2002-09-25 2002-09-25 Ansteuereinrichtung für eine Magnetspule
DE10244522 2002-09-25

Publications (2)

Publication Number Publication Date
EP1403885A2 true EP1403885A2 (fr) 2004-03-31
EP1403885A3 EP1403885A3 (fr) 2007-05-02

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Family Applications (1)

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EP03020543A Withdrawn EP1403885A3 (fr) 2002-09-25 2003-09-17 Appareil de commande pour une bobine magnétique

Country Status (2)

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EP (1) EP1403885A3 (fr)
DE (1) DE10244522B4 (fr)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006084520A1 (fr) * 2005-02-14 2006-08-17 Robert Bosch Gmbh Procede et circuit pour detecter le courant d'un moteur electrique commande par modulation d'impulsions en largeur
US9074770B2 (en) 2011-12-15 2015-07-07 Honeywell International Inc. Gas valve with electronic valve proving system
US9645584B2 (en) 2014-09-17 2017-05-09 Honeywell International Inc. Gas valve with electronic health monitoring
US9657946B2 (en) 2012-09-15 2017-05-23 Honeywell International Inc. Burner control system
US9683674B2 (en) 2013-10-29 2017-06-20 Honeywell Technologies Sarl Regulating device
US9835265B2 (en) 2011-12-15 2017-12-05 Honeywell International Inc. Valve with actuator diagnostics
US9841122B2 (en) 2014-09-09 2017-12-12 Honeywell International Inc. Gas valve with electronic valve proving system
US9846440B2 (en) 2011-12-15 2017-12-19 Honeywell International Inc. Valve controller configured to estimate fuel comsumption
US9851103B2 (en) 2011-12-15 2017-12-26 Honeywell International Inc. Gas valve with overpressure diagnostics
US9995486B2 (en) 2011-12-15 2018-06-12 Honeywell International Inc. Gas valve with high/low gas pressure detection
US10024439B2 (en) 2013-12-16 2018-07-17 Honeywell International Inc. Valve over-travel mechanism
US10422531B2 (en) 2012-09-15 2019-09-24 Honeywell International Inc. System and approach for controlling a combustion chamber
US10503181B2 (en) 2016-01-13 2019-12-10 Honeywell International Inc. Pressure regulator
US10564062B2 (en) 2016-10-19 2020-02-18 Honeywell International Inc. Human-machine interface for gas valve
US10697815B2 (en) 2018-06-09 2020-06-30 Honeywell International Inc. System and methods for mitigating condensation in a sensor module
US10697632B2 (en) 2011-12-15 2020-06-30 Honeywell International Inc. Gas valve with communication link
US11073281B2 (en) 2017-12-29 2021-07-27 Honeywell International Inc. Closed-loop programming and control of a combustion appliance

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8905063B2 (en) 2011-12-15 2014-12-09 Honeywell International Inc. Gas valve with fuel rate monitor
US8839815B2 (en) 2011-12-15 2014-09-23 Honeywell International Inc. Gas valve with electronic cycle counter
US8899264B2 (en) 2011-12-15 2014-12-02 Honeywell International Inc. Gas valve with electronic proof of closure system
US8947242B2 (en) 2011-12-15 2015-02-03 Honeywell International Inc. Gas valve with valve leakage test

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3204234C2 (de) * 1981-10-13 1985-08-29 Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch Schaltungsanordnung zur Steuerung eines Relais
DE3233536A1 (de) * 1982-09-10 1984-04-05 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zum getakteten regeln eines eine spule durchfliessenden stromes
DE3832817A1 (de) * 1988-09-28 1990-03-29 Honeywell Bv Gleichstromgespeiste steuerschaltung fuer ein magnetventil
DE4140586C2 (de) * 1991-12-10 1995-12-21 Clark Equipment Co N D Ges D S Verfahren und Steuereinrichtung zur Steuerung des Stroms durch eine Magnetspule
DE19711768B4 (de) * 1997-03-21 2007-04-05 Bosch Rexroth Aktiengesellschaft Elektromagnetischer Stellantrieb

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006084520A1 (fr) * 2005-02-14 2006-08-17 Robert Bosch Gmbh Procede et circuit pour detecter le courant d'un moteur electrique commande par modulation d'impulsions en largeur
US9995486B2 (en) 2011-12-15 2018-06-12 Honeywell International Inc. Gas valve with high/low gas pressure detection
US9835265B2 (en) 2011-12-15 2017-12-05 Honeywell International Inc. Valve with actuator diagnostics
US10851993B2 (en) 2011-12-15 2020-12-01 Honeywell International Inc. Gas valve with overpressure diagnostics
US9846440B2 (en) 2011-12-15 2017-12-19 Honeywell International Inc. Valve controller configured to estimate fuel comsumption
US9851103B2 (en) 2011-12-15 2017-12-26 Honeywell International Inc. Gas valve with overpressure diagnostics
US9074770B2 (en) 2011-12-15 2015-07-07 Honeywell International Inc. Gas valve with electronic valve proving system
US10697632B2 (en) 2011-12-15 2020-06-30 Honeywell International Inc. Gas valve with communication link
US11421875B2 (en) 2012-09-15 2022-08-23 Honeywell International Inc. Burner control system
US9657946B2 (en) 2012-09-15 2017-05-23 Honeywell International Inc. Burner control system
US10422531B2 (en) 2012-09-15 2019-09-24 Honeywell International Inc. System and approach for controlling a combustion chamber
US9683674B2 (en) 2013-10-29 2017-06-20 Honeywell Technologies Sarl Regulating device
US10215291B2 (en) 2013-10-29 2019-02-26 Honeywell International Inc. Regulating device
US10024439B2 (en) 2013-12-16 2018-07-17 Honeywell International Inc. Valve over-travel mechanism
US9841122B2 (en) 2014-09-09 2017-12-12 Honeywell International Inc. Gas valve with electronic valve proving system
US10203049B2 (en) 2014-09-17 2019-02-12 Honeywell International Inc. Gas valve with electronic health monitoring
US9645584B2 (en) 2014-09-17 2017-05-09 Honeywell International Inc. Gas valve with electronic health monitoring
US10503181B2 (en) 2016-01-13 2019-12-10 Honeywell International Inc. Pressure regulator
US10564062B2 (en) 2016-10-19 2020-02-18 Honeywell International Inc. Human-machine interface for gas valve
US11073281B2 (en) 2017-12-29 2021-07-27 Honeywell International Inc. Closed-loop programming and control of a combustion appliance
US10697815B2 (en) 2018-06-09 2020-06-30 Honeywell International Inc. System and methods for mitigating condensation in a sensor module

Also Published As

Publication number Publication date
EP1403885A3 (fr) 2007-05-02
DE10244522B4 (de) 2005-06-30
DE10244522A1 (de) 2004-04-15

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