EP1921639A2 - Commutateur de commande pour un actionneur et procédé destiné à la commande d'un actionneur - Google Patents

Commutateur de commande pour un actionneur et procédé destiné à la commande d'un actionneur Download PDF

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Publication number
EP1921639A2
EP1921639A2 EP07021597A EP07021597A EP1921639A2 EP 1921639 A2 EP1921639 A2 EP 1921639A2 EP 07021597 A EP07021597 A EP 07021597A EP 07021597 A EP07021597 A EP 07021597A EP 1921639 A2 EP1921639 A2 EP 1921639A2
Authority
EP
European Patent Office
Prior art keywords
actuator
drive signals
control
charging
energy store
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Withdrawn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
EP07021597A
Other languages
German (de)
English (en)
Other versions
EP1921639A3 (fr
Inventor
Franz A. Bierbrauer
Christian Götze
Roland Klein
Gerd Truckenbrodt
Hubert Keller
Manfred Schlierf
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.)
Actor Engineering & Co KG GmbH
Original Assignee
Actor Engineering & Co KG 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 Actor Engineering & Co KG GmbH filed Critical Actor Engineering & Co KG GmbH
Publication of EP1921639A2 publication Critical patent/EP1921639A2/fr
Publication of EP1921639A3 publication Critical patent/EP1921639A3/fr
Withdrawn legal-status Critical Current

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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
    • H01F7/1805—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current
    • H01F7/1816—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current making use of an energy accumulator

Definitions

  • the invention relates to a drive circuit for an actuator and a method for driving an actuator.
  • an actuator such as the ignition mechanism for an airbag or locks for headrests, hoods, fuel tank lid, trunk lid, doors and the like, only small electrical currents available.
  • the actuators are triggered via control signals from a control unit.
  • the output power of the output stage of such control units is not sufficient for the control of an actuator, which is to operate with a comparatively large electrical power.
  • a first control unit outputs a control pulse for triggering the actuator and a second control unit operates essentially as a power stage and ensures that sufficient electrical energy is present at the actuator via a second electrical line in order to reliably trigger it.
  • a drive circuit for an actuator and a method for driving an actuator to be provided, which can ensure reliable triggering of the actuator with reduced structural complexity.
  • a drive circuit for an actuator with a control device is provided with means for generating drive signals, at least one energy storage and a charging unit, wherein the charging unit has means to charge by means of the drive signals the at least one energy storage.
  • the invention is therefore based on providing an additional energy store, for example a capacitor, and charging this energy store by means of the drive signals from the controller or to obtain its charge.
  • an additional energy store for example a capacitor
  • various options can be provided to decide whether the drive signal of the control unit is to be used to charge the energy storage or to be used to trigger the actuator.
  • the control unit only has to output repeated drive signals which need not be different from each other.
  • a first type of drive signal has a low signal voltage level that is insufficient to trip the actuator.
  • this low signal level can be used to charge the energy storage.
  • a triggering of the actuator is then effected by means of a second, different drive signal having a higher signal voltage level.
  • different signal levels for example, different signal frequencies can be used.
  • Such evaluation can receive the received drive signals and decide depending on the type of drive signals received, whether they should serve to charge the energy storage or are provided for triggering the actuator.
  • the control unit outputs diagnostic pulses for diagnosing the system, especially the actuator, and outputs various control pulses for triggering the actuator.
  • the diagnostic pulses and the control pulses differ in the signal voltage level.
  • the diagnostic pulses for diagnosing the actuator are used to charge an energy store, such as a capacitor, in the region of the actuator.
  • the diagnostic pulses are voltage or current pulses that are in a so-called "no-fire" region of the actuator, so represent a current or voltage pulse that is not large enough to trigger the system, so the actuator.
  • a loading electronics of the actuator can distinguish between diagnostic pulses and control pulses. By example, cyclic diagnostic pulses of energy storage is charged or its charge is obtained.
  • the first or the first diagnostic pulses can be extended or carried out at a shorter interval or at a higher repetition rate. After charging the energy storage, the subsequent diagnostic pulses can then be shorter or follow each other in a longer interval and then serve only to maintain charge.
  • the charging electronics or evaluation electronics can increase the diagnostic voltage of the diagnostic pulses by a voltage multiplier and store them in the energy store. As a result, the capacity of the energy storage is better utilized. Then there is a control pulse to trigger the actuator, the energy of this control pulse from the controller and the energy of the energy storage is used together to trigger the actuator.
  • FIGURE is a schematic representation of a drive circuit according to the invention.
  • the single figure shows a schematic representation of a drive circuit 10 for an airbag.
  • Airbags are ignited, for example, by means of a squib, which develops after activation pressure gases or opens a compressed air cylinder, which then inflates the airbag.
  • Significant electrical energy is needed to activate such a squib, and the squib is part of an actuator 12 that also has suitable means to convert electrical energy, for example, into thermal energy to ignite the squib.
  • a control unit 14 is provided for triggering the actuator 12 and has, for example, a crash sensor.
  • the control unit 14 is connected to an output stage 16, in which the output signals of the control unit are formed.
  • the control unit 14 can output in conjunction with the output stage 16 two different types of output signals, namely on the one hand a control pulse 18 for triggering the actuator and diagnostic pulses 20.
  • the control pulse 18 has a voltage level U 1 and the diagnostic pulses have a voltage pulse U 2 , where U 2 is less than U 1 .
  • the diagnostic pulses 20 are initially used during operation to check the presence and the functionality of the actuator 12.
  • the actuator 12 is also integrated into a charging and control circuit 22, which has an intelligent charging and evaluation electronics 24, a transistor 26 and a capacitor 28.
  • the charging and evaluation electronics 24 can distinguish between the diagnostic pulses 20 and the control pulse 18.
  • the charging and evaluation electronics 24 for this purpose includes a voltage multiplier, which increases the voltage level U 2 of the diagnostic pulses, so that the capacitor 28 is applied a higher voltage than the voltage level U 2 .
  • the capacitor 28 is located in the immediate vicinity of the actuator 12 in order to keep line losses as low as possible.
  • the control unit 14 for example, after its commissioning send out numerous diagnostic pulses 20 in a short sequence. After the capacitor 28 has a predefined energy content, the sequence of the diagnostic pulses 20 can then be reduced to compensate for any loss of charge on the capacitor 28.
  • the control unit 14 If the crash sensor detects a vehicle collision in the control unit 14, then the control unit 14 outputs the control pulse 18 as a control signal.
  • the charging and evaluation electronics 24 detects the presence of a control pulse and switches it to the transistor 26 on.
  • the transistor 26 is thereby conductive, so that the stored energy in the capacitor 28 via the actuator 12 and the transistor 26 can flow.
  • the stored energy in the capacitor 28 and the energy of the control pulse 18 is sufficient to ignite the squib in the actuator 12 and reliably inflate the airbag.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Air Bags (AREA)
  • Control Of Eletrric Generators (AREA)
EP07021597A 2006-11-08 2007-11-07 Commutateur de commande pour un actionneur et procédé destiné à la commande d'un actionneur Withdrawn EP1921639A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006053531A DE102006053531A1 (de) 2006-11-08 2006-11-08 Ansteuerschaltung für einen Aktor und Verfahren zum Ansteuern eines Aktors

Publications (2)

Publication Number Publication Date
EP1921639A2 true EP1921639A2 (fr) 2008-05-14
EP1921639A3 EP1921639A3 (fr) 2009-05-13

Family

ID=39027270

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07021597A Withdrawn EP1921639A3 (fr) 2006-11-08 2007-11-07 Commutateur de commande pour un actionneur et procédé destiné à la commande d'un actionneur

Country Status (3)

Country Link
US (1) US20080165467A1 (fr)
EP (1) EP1921639A3 (fr)
DE (1) DE102006053531A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016096212A1 (fr) * 2014-12-15 2016-06-23 Robert Bosch Gmbh Procédé de commande d'un actionneur électromagnétique pour activer un dispositif de protection des personnes pour un véhicule, dispositif de commande, dispositif d'activation et unité d'activation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011007881B4 (de) * 2011-04-21 2020-07-16 Bayerische Motoren Werke Aktiengesellschaft Diagnose eines Personenschutzsystems

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4679766A (en) * 1984-05-01 1987-07-14 Cuming Kenneth J Solenoid booster
EP0386659A2 (fr) * 1989-03-09 1990-09-12 Siemens Aktiengesellschaft Circuit de transmission de signaux binaires et d'énergie par une ligne
US6407593B1 (en) * 1999-06-30 2002-06-18 Denso Corporation Electromagnetic load control apparatus having variable drive-starting energy supply

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0669788B2 (ja) * 1989-07-21 1994-09-07 アスコ株式会社 車輌用安全装置
DE19616293A1 (de) * 1996-04-24 1997-10-30 Bosch Gmbh Robert Bussystem für die Übertragung von Nachrichten

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4679766A (en) * 1984-05-01 1987-07-14 Cuming Kenneth J Solenoid booster
EP0386659A2 (fr) * 1989-03-09 1990-09-12 Siemens Aktiengesellschaft Circuit de transmission de signaux binaires et d'énergie par une ligne
US6407593B1 (en) * 1999-06-30 2002-06-18 Denso Corporation Electromagnetic load control apparatus having variable drive-starting energy supply

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016096212A1 (fr) * 2014-12-15 2016-06-23 Robert Bosch Gmbh Procédé de commande d'un actionneur électromagnétique pour activer un dispositif de protection des personnes pour un véhicule, dispositif de commande, dispositif d'activation et unité d'activation

Also Published As

Publication number Publication date
US20080165467A1 (en) 2008-07-10
EP1921639A3 (fr) 2009-05-13
DE102006053531A1 (de) 2008-05-15

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