EP2171739A2 - Dispositif de commande pour un commutateur comprenant une bobine de collage et/ou de maintien et procédé de commande du courant qui circule à travers la bobine - Google Patents

Dispositif de commande pour un commutateur comprenant une bobine de collage et/ou de maintien et procédé de commande du courant qui circule à travers la bobine

Info

Publication number
EP2171739A2
EP2171739A2 EP08735197A EP08735197A EP2171739A2 EP 2171739 A2 EP2171739 A2 EP 2171739A2 EP 08735197 A EP08735197 A EP 08735197A EP 08735197 A EP08735197 A EP 08735197A EP 2171739 A2 EP2171739 A2 EP 2171739A2
Authority
EP
European Patent Office
Prior art keywords
coil
switching device
control
control device
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.)
Granted
Application number
EP08735197A
Other languages
German (de)
English (en)
Other versions
EP2171739B1 (fr
Inventor
Wolfgang Meid
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eaton Electrical IP GmbH and Co KG
Original Assignee
Moeller GmbH
Kloeckner Moeller GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Moeller GmbH, Kloeckner Moeller GmbH filed Critical Moeller GmbH
Publication of EP2171739A2 publication Critical patent/EP2171739A2/fr
Application granted granted Critical
Publication of EP2171739B1 publication Critical patent/EP2171739B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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

  • Control device for a switching device with tightening and / or holding coil and method for controlling the current flowing through the coil
  • the invention relates to a control device for a switching device, in particular for a voltage or current release, with a tightening and / or holding coil comprising a connected to the tightening and / or holding coil, pulse width-controlled switching device, and a control unit with the the switching device is connected and generates a control signal with adjustable pulse width, and a method for controlling the current flowing through the tightening and / or holding coil current.
  • a control device for a contactor drive comprising a pulse width-controlled electronic switching device connected in series with a drive coil, and a control circuit which is connected on the output side to the switching device.
  • the contactor drive has two active switching states, namely tightening and holding the coil.
  • two characteristic value tables with setpoint values are stored in the control circuit.
  • two circuits are used for determining the instantaneous drive coil voltage for the two different switching states. The two measured values for the drive coil voltage are transferred to the control circuit.
  • the control circuit has two signal inputs with upstream analog-digital converters for converting the signals.
  • EP 0 789 378 A1 discloses a control device for a contactor drive which consists of a series connection of a drive coil, a switching transistor and a measuring resistor for supplying a measured value from the coil current. The measured value is fed to a control circuit, which determines a control signal for the switching transistor on the basis of the measured value, the input voltage of the control device and the switching state of the contactor drive. The determination of a coil current is metrologically complex, and the control of the current flowing through the coil is time consuming.
  • the invention is therefore based on the object over the prior art 5 simplified control device for a switching device, in particular for a voltage or current release, with a tightening and / or holding coil to provide the current through the tightening and / or holding coil of the switching device keeps approximately constant, without characteristic tables must be stored in a control unit.
  • control unit determines the pulse width of the control signal in response to the input voltage signal of the control unit so that the control device, the current through the suit and / or
  • the object is achieved for a switching device according to the preamble of claim 19 in that the control unit determines the pulse width of the control signal in response to the input voltage signal of the control unit so that the control device to the current through the tightening and / or holding coil of the switching device 0 keeps approaching constant.
  • the object is further achieved by a method for controlling the current flowing through a starting and / or holding coil of a switching device, in that the input voltage of the switching device is determined and a pulse width modulation signal for driving a switching device is determined in dependence on a predefinable voltage setpoint of the coil voltage, that the switching device keeps the current through the tightening and / or holding coil of the switching device approximately constant.
  • the control device thus holds by means of a voltage measurement, the current through the switching device approximately constant.
  • a nominal value for the voltage applied to the coil of the switching device can be specified to the control device as a function of the type of switching device. the. If the switching device has a pull-in and / or holding coil as the voltage or current release, and if the input voltage of the control device is a DC voltage or an AC voltage, then the current through the switching device is regulated to an approximately constant value. This is achieved by an approximately constant coil voltage and proves to be very advantageous because of the lower circuit complexity compared to a current measurement for adjusting a constant coil current.
  • the control device regulates the voltage across the coil of the switching device so that it corresponds to the predetermined coil nominal voltage regardless of the switching state, tightening or holding the coil, the switching device.
  • the control signal with adjustable pulse width for the switching device is generated by a control unit.
  • the control unit is input side, e.g. connected to a voltage meter for detecting the level of the input voltage signal, which transmits a current input voltage signal to the control unit.
  • the control unit determines a current control signal with a current pulse width, so that the switching device keeps the coil voltage at the coil of the switching device approximately constant.
  • control device regardless of the switching state of the switching device (tightening operation or holding operation), the voltage across the or the current through the switching device constant. A complex measurement of the current flowing through the switching device is thereby avoided.
  • the coil voltage currently applied to the switching device is advantageously determined.
  • at least one scanning device is provided for scanning the respectively currently applied input voltage.
  • this scanning device which may be part of the voltmeter, the applied input voltage is sampled at predetermined times or possibly continuously. The one from the voltmeter The determined input voltage value is then multiplied by the quotient of the duration of the application of a voltage signal to the control unit (switch-on time) and the period duration of the pulse-width-modulated control signal.
  • the coil voltage value obtained is advantageously compared with a predefinable coil voltage setpoint, and from this a new switch-on time for the pulse width modulation is determined.
  • the pulse width-controlled switching device comprises a switching transistor.
  • the switching transistor is a field-effect transistor, in particular a self-blocking n-channel field-effect transistor.
  • An advantage of the use of such a field effect transistor is that it can be driven by a voltage, in this case directly via the voltage output by the control unit.
  • the control signal with adjustable pulse width for the switching device can be generated by a pulse generator.
  • the control unit transmits to the pulse generator the determined current pulse width of the control signal.
  • the pulse generator may be provided separately from the control unit, thereby reducing the complexity of the control unit.
  • control unit can directly generate the control signal with adjustable pulse width itself. This avoids the provision of a separate pulse generator.
  • the control unit of the control device advantageously has at least one data processing unit for processing data, whereby the control unit can quickly and efficiently acquire and process the data for determining the respectively current pulse width of the control signal.
  • the data processing unit comprises a microcontroller.
  • a microcontroller is inexpensive and can be easily adapted to a particular field of application.
  • a control unit has a low impedance, while a voltmeter has a high impedance.
  • the control unit comprises an impedance converter for matching the impedance of the high-impedance voltmeter to the low-impedance of the control unit.
  • a voltmeter which can be used to determine the input voltage signal of the control unit is only minimally loaded and the accuracy of the detectable measured values is increased.
  • Such an impedance converter advantageously comprises at least one operational amplifier, since this is inexpensive and versatile. Furthermore, an operational amplifier over the discrete circuit technology has the advantage that a stabilization of the operating point and a compensation of the temperature behavior is not necessary.
  • the data processing unit generally operates internally with digital signals.
  • An analog signal applied on the input side here analog measuring signal of the voltmeter for determining the input voltage signal of the control unit, should therefore be converted.
  • the data processing unit comprises an analog-to-digital converter, which converts the analog signals into digital signals for further processing in the data processing unit.
  • the switching device comprises a coil, namely the tightening and / or holding coil for actuating the voltage and / or current release.
  • a coil namely the tightening and / or holding coil for actuating the voltage and / or current release.
  • the control device has on the input side a rectifier circuit for the rectification of an AC voltage applied to the input of the control device.
  • the input voltage signal of the control device can comprise, in addition to a DC component, also AC components that can be filtered out by an advantageously provided filter circuit.
  • a Such filter circuit may be provided on the input side of the control device.
  • control device Depending on the field of application of the control device, alternative embodiments of the control device are possible. For example, it is advantageous if the method for controlling is continuously feasible if the input voltage of the control unit is subject to great fluctuations. In other circumstances, however, it may also be expedient that the method for controlling may be carried out (at random) at certain adjustable times, for example when it is foreseeable that the input voltage will only change at certain points in time. For detecting such a change, performing the method after the input voltage change is provided. The accuracy with which the control device keeps the current through a switching device constant may depend on the frequency of the control operations.
  • control device In order for the control device to be used as flexibly as possible, it proves to be advantageous if, in addition to the continuous and random control, the control can still be carried out intermittently, i. the control is performed regularly at the same time interval, wherein the time between two control operations is adjustable.
  • the time between two control operations is not greater than 150 ⁇ s, and preferably not greater than 70 ⁇ S is.
  • FIG. 1 shows a circuit diagram of a control device according to the invention for a switching device with a holding or holding coil
  • FIG. 2 shows a circuit diagram of the detail of the control unit of the control device according to FIG. 1,
  • FIG. 3 shows a flow chart of the determination of a new pulse width modulation on-time, which is carried out by the control unit of the control device according to FIG.
  • FIG. 4 shows a voltage / time diagram of a voltage signal plotted on the switch-on time of the pulse width modulation for the control of the switching device according to FIG. 1.
  • FIG. 1 shows a control device 1 according to the invention for a switching device.
  • the control device 1 keeps the current through a tightening or holding coil 2 for actuating a voltage or current release of the switching device approximately constant.
  • the voltage applied to the tightening / holding coil 2 is measured.
  • the current flowing through the pull-in / hold coil 2 is also kept approximately constant.
  • a switching device 3 is connected to the tightening / holding coil 2.
  • the switching device is an n-channel field-effect transistor which is connected on the drain side to the pull-in / hold coil 2 and to the control unit 4 on the gate side.
  • the switching device 3 is controlled via a control signal with adjustable Pulsbrejte. Depending on the pulse width of the control signal, the switching device 3 controls the voltage applied to the pull-in / hold coil 2 of the switching device.
  • the control signal with adjustable pulse width is generated by a control unit 4.
  • the control unit 4 compares the calculated coil voltage Us P presently applied to the tightening / holding coil 2 with a coil voltage setpoint Usp stored in the control unit 4. so ii and changes depending on the Equivalent to the pulse width of the control signal, so that the switching device 3, the coil voltage U sp at the tightening / holding coil 2 holds approximately constant.
  • the control unit 4 requires the currently applied to the control device 1 input voltage U.
  • the input voltage U is provided to the control unit 4 via a voltmeter 5, wherein a scanning device 6 for sampling the input voltage U provided can be.
  • a voltage applied to the input of the control device 1 AC voltage is converted by a rectifier circuit or filter circuit 7 into a DC voltage, wherein a conversion into a pulsating DC voltage is sufficient.
  • the DC voltage is applied to the scanning device 6 and the coil 2.
  • FIG. 2 shows a circuit diagram of the control unit 4 shown only schematically in FIG. 1.
  • the control unit 4 comprises a microcontroller 8 and an operational amplifier 9.
  • the control unit 4 receives from the voltmeter 5, the instantaneous input voltage U of the control device 1, wherein the voltmeter 5 usually has a high impedance, while the microcontroller 8 has a low impedance. If the operational amplifier 9 did not adapt the impedances to one another, then the low-impedance impedance of the control unit would heavily load the high-resistance impedance of the voltage meter, which would significantly reduce the accuracy of the voltmeter 5.
  • the value of the input voltage U of the control device 1 determined by the voltmeter 5 is an analogue measured value.
  • an analog / digital converter A1 is provided at the input of the microcontroller 8.
  • the microcontroller 8 generates a new control signal with an adapted pulse width.
  • FIG. 3 shows a corresponding flow diagram of this control or regulation process
  • FIG. 4 shows a voltage / time diagram for the control signal with controllable pulse width.
  • the voltage meter 5 is used to determine the input voltage U currently applied to the control device 1 or to sample it from the scanning device 6 and to transfer it to the control unit 4.
  • the coil voltage U Sp currently applied to the tightening / holding coil 2 is calculated.
  • the input voltage value U from step 10 is multiplied by the time t On , where t On corresponds to the pulse width of the control signal.
  • this value is divided by the period tp W w ⁇ of the control signal.
  • the result of the calculation of the coil voltage U Sp is shown in FIG. 4 with a dashed line and identified at the voltage axis by Us p .
  • the coil voltage U sp is compared with the predefinable coil voltage setpoint U Sp , s o i ⁇ . This is done in a controller (see Figure 3). In response to the comparison value, the controller determines a new pulse width of PWM for the control signal of the switching device 3, so that on the pull / holding coil 2 adjacent coil voltage U Sp AQF the coil voltage desired value U Sp, is controlled soi ⁇ .
  • control signal is generated with the new pulse width PWM and forwarded to the switching device 3, as indicated in Figure 1.
  • control devices for a switching device with a Tightening and / or holding coil are still numerous further possible, in each of which an adjustable pulse width of a control signal in response to a detectable input voltage of the control device is set so that the tension on the tightening and / or holding coil and thus by this se flowing current is kept approximately constant.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Relay Circuits (AREA)
  • Dc-Dc Converters (AREA)

Abstract

Lors de la commande d'un commutateur comprenant une bobine de collage et/ou de maintien (2), il est avantageux que le courant à travers la bobine (2) soit approximativement constant, et ce indépendamment de l'état de commutation collage ou maintien. Pour éviter une mesure du courant complexe du point de vue de la technique de circuit et de la technique de mesure ou encore une unité de commande (8) complexe dans laquelle sont enregistrés des tableaux de valeurs caractéristiques pour les différents états de commutation, l'invention réalise un dispositif de commande (1) pour un commutateur, lequel comprend un dispositif de commutation (3) commandé en largeur d'impulsion relié avec la bobine (2) ainsi qu'une unité de commande (4) qui est reliée avec le dispositif de commutation (3) et qui génère un signal de commande à largeur d'impulsion variable. Selon l'invention, l'unité de commande (4) détermine la largeur d'impulsion du signal de commande en fonction du signal de tension d'entrée (U) de l'unité de commande (4) de telle sorte que le dispositif de commande (1) maintient approximativement constant le courant à travers la bobine de collage et/ou de maintien (2) du commutateur. Un tel dispositif de commande est intégré dans un commutateur. Un procédé destiné à commander le courant qui circule à travers une bobine de collage et/ou de maintien (2) d'un commutateur inclut la détermination de la tension d'entrée (U) du commutateur et la détermination, en fonction d'une valeur de consigne de tension (USp,soll) pouvant être prédéfinie pour la tension de bobine (USp), d'un signal de modulation de largeur d'impulsion en vue de commander un dispositif de commutation de telle sorte qu'un dispositif de commutation (3) maintient approximativement constant le courant à travers la bobine de collage et/ou de maintien (2) du commutateur.
EP08735197.9A 2007-07-09 2008-04-12 Dispositif de commande pour un commutateur comprenant une bobine de collage et/ou de maintien et procédé de commande du courant qui circule à travers la bobine Not-in-force EP2171739B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007031995A DE102007031995A1 (de) 2007-07-09 2007-07-09 Steuervorrichtung für ein Schaltgerät mit Anzugs- und/oder Haltespule sowie Verfahren zum Steuern des durch die Spule fließenden Stroms
PCT/EP2008/002909 WO2009006952A2 (fr) 2007-07-09 2008-04-12 Dispositif de commande pour un commutateur comprenant une bobine de collage et/ou de maintien et procédé de commande du courant qui circule à travers la bobine

Publications (2)

Publication Number Publication Date
EP2171739A2 true EP2171739A2 (fr) 2010-04-07
EP2171739B1 EP2171739B1 (fr) 2015-08-26

Family

ID=40032507

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08735197.9A Not-in-force EP2171739B1 (fr) 2007-07-09 2008-04-12 Dispositif de commande pour un commutateur comprenant une bobine de collage et/ou de maintien et procédé de commande du courant qui circule à travers la bobine

Country Status (7)

Country Link
US (1) US20100289603A1 (fr)
EP (1) EP2171739B1 (fr)
JP (1) JP4991936B2 (fr)
CN (1) CN101689442A (fr)
CA (1) CA2693408A1 (fr)
DE (1) DE102007031995A1 (fr)
WO (1) WO2009006952A2 (fr)

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MXPA03002045A (es) * 2000-09-08 2003-07-24 Amgen Inc Composiciones analogas de factor estimulador de colonias de granulocitos y metodos para su elaboracion.
DE102007046634B3 (de) 2007-09-27 2009-05-28 Moeller Gmbh Spannungsversorgung für ein spannungs- oder stromauslösendes Schaltgerät sowie deren Verwendung in einem solchen Schaltgerät und Verfahren zur Spannungsversorgung für ein solches Schaltgerät
US8159808B2 (en) 2009-02-26 2012-04-17 Raytheon Company +28V aircraft transient suppression
DE102010018755A1 (de) 2010-04-29 2011-11-03 Kissling Elektrotechnik Gmbh Relais mit integrierter Sicherheitsbeschaltung
DE102011089996B4 (de) * 2011-12-27 2018-02-01 Continental Automotive Gmbh Bordnetzsystem und Verfahren zum Betreiben eines Bordnetzsystems
US9698669B2 (en) * 2012-08-10 2017-07-04 Eaton Electrical Ip Gmbh & Co. Kg Control device for a switching device with separate start-up and holding coils
DE102013220853A1 (de) * 2013-10-15 2015-04-16 Continental Automotive Gmbh Verfahren zum Ansteuern einer elektromagnetischen Stellvorrichtung mit einer Spule
DE102014108107A1 (de) 2014-06-10 2015-12-17 Endress + Hauser Flowtec Ag Spulenanordnung sowie damit gebildeter elektromechanischer Schalter bzw. Meßumformer
US9786457B2 (en) 2015-01-14 2017-10-10 General Electric Company Systems and methods for freewheel contactor circuits
CN105244228B (zh) * 2015-10-22 2018-02-16 河南精诚汽车零部件有限公司 一种车用带双重保护功能的起动继电器
DE102016100188A1 (de) * 2016-01-05 2017-07-06 Eaton Electrical Ip Gmbh & Co. Kg Steuervorrichtung für einen elektromagnetischen Antrieb eines Schaltgeräts
US11488798B2 (en) 2020-03-17 2022-11-01 Hamilton Sundstrand Corporation Current source contactor drive with economizers
CN112187228B (zh) * 2020-09-30 2024-12-06 贵州天义电器有限责任公司 一种接触器线圈恒流脉宽调制电路

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JP3496982B2 (ja) * 1994-07-15 2004-02-16 三菱電機株式会社 電磁接触器
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Also Published As

Publication number Publication date
CA2693408A1 (fr) 2009-01-15
JP4991936B2 (ja) 2012-08-08
WO2009006952A2 (fr) 2009-01-15
DE102007031995A1 (de) 2009-01-15
US20100289603A1 (en) 2010-11-18
JP2010532958A (ja) 2010-10-14
EP2171739B1 (fr) 2015-08-26
WO2009006952A3 (fr) 2009-03-12
CN101689442A (zh) 2010-03-31

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