EP3340259A1 - Solenoidvorrichtung - Google Patents

Solenoidvorrichtung Download PDF

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Publication number
EP3340259A1
EP3340259A1 EP16465562.3A EP16465562A EP3340259A1 EP 3340259 A1 EP3340259 A1 EP 3340259A1 EP 16465562 A EP16465562 A EP 16465562A EP 3340259 A1 EP3340259 A1 EP 3340259A1
Authority
EP
European Patent Office
Prior art keywords
solenoid
driving unit
transistor
solenoid device
potential
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
EP16465562.3A
Other languages
English (en)
French (fr)
Other versions
EP3340259B1 (de
Inventor
Marius Dabuleanu
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.)
Vitesco Technologies Germany GmbH
Original Assignee
Conti Temic Microelectronic 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 Conti Temic Microelectronic GmbH filed Critical Conti Temic Microelectronic GmbH
Priority to EP16465562.3A priority Critical patent/EP3340259B1/de
Priority to DE102017222521.1A priority patent/DE102017222521A1/de
Publication of EP3340259A1 publication Critical patent/EP3340259A1/de
Application granted granted Critical
Publication of EP3340259B1 publication Critical patent/EP3340259B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01F7/128—Encapsulating, encasing or sealing
    • 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
    • H01F7/064—Circuit arrangements for actuating electromagnets
    • 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
    • H01F7/127—Assembling

Definitions

  • the invention relates to a solenoid device, in particular for a solenoid valve.
  • Solenoid devices are used in a multitude of technical applications, for example to provide electromechanical control for valves in fluidic systems.
  • a solenoid coil in such a valve generates a magnetic field which actuates a valve piston, diaphragm or the like, in order to switch the valve between an open and closed state.
  • a driving unit In order to control the solenoid, a driving unit is necessary which provides the needed voltage and current to put the solenoid in a predefined state.
  • driving units are usually placed external to the solenoid itself, which is usually housed in a separate housing.
  • the driving unit is provided on a printed circuit board (PCB).
  • FIG. 1 An example for a solenoid device according to the prior art is shown in Fig. 1 .
  • a solenoid S is arranged in a housing 10. Terminal contacts A, B of the solenoid S are connected to an external driving unit 12 in form of a PCB.
  • the driving unit 12 comprises connectors 14 for a power supply and connectors 16 for a communication connection with further external controller components.
  • any change in the solenoid layout during the design phase necessitates a redesign of the PCB of the driving unit 12 to accommodate changed, added or removed solenoids S.
  • a PCB takes up considerable room, which can be problematic in many applications with restricted installation space, as it is the case for example in automotive applications.
  • a solenoid device in particular for a solenoid valve, comprises a solenoid coil having a housing and a driving unit for the solenoid coil, wherein the driving unit is arranged within the housing of the solenoid coil.
  • each solenoid device carries its own driving unit, the external circuitry, if present at all, does not have to be redesigned if any changes regarding the solenoid layout of a particular apparatus are made during the design phase or during later overhauls.
  • the driving unit comprises a high side switch driver circuit and a first transistor, in particular a MOSFET (metal-oxide-semiconductor field effect transistor), wherein the first transistor is adapted to apply a first potential to the solenoid when activated by the high side switch driver circuit.
  • MOSFET metal-oxide-semiconductor field effect transistor
  • High side switch is to be understood in that the first transistor is arranged between high potential, i.e. the power supply, and the solenoid. High side drivers are robust against faults to ground, which are the most common fault type in automotive applications.
  • the driving unit comprises a free wheeling diode driver circuit and a second transistor, in particular a MOSFET, wherein the second transistor is adapted to apply a second potential to the solenoid when activated by the free wheeling diode driver circuit.
  • the second transistor acts like a protective diode eliminating fly back voltage spikes as caused by loss or disruption of the power supply for the inductive load of the solenoid.
  • the second transistor is preferably arranged in parallel to the solenoid. Furthermore, the second transistor can be applied to maintain current flow through the solenoid.
  • the driving unit comprises a low side switch driver circuit and a third transistor, in particular a MOSFET, wherein the third transistor is adapted to apply a third potential to the solenoid when activated by the low side switch driver circuit.
  • a low side switch driver comprises the switching transistor being arranged between the solenoid and ground.
  • Low side drivers are generally easier to control but lack protection from faults to ground compared to high side drivers.
  • first, second and third transistor are connected in series.
  • the driving offers the option to select between the high side and low side driver to control the solenoid, while the second transistor provides power surge protection when switching the solenoid in both of these cases.
  • the first and/or second and/or third potential is a pulse-width modulated signal.
  • Pulse-width modulation is based on providing a rectangular signal switching between a HIGH potential state and a LOW potential state with varying pulse lengths. It allows for setting the magnetic field strength of the solenoid in an analog manner while providing a digital control signal. Due to the low-pass filtering characteristics of the solenoid, the resulting average magnetic field strength depends on the duty cycle of the PWM signal applied to the solenoid, i.e. the ratio between the times the PWM signal is in the HIGH state and the LOW state.
  • the solenoid is connected in series to a measuring shunt and the driving unit comprises a measurement circuit to measure a potential drop over the measuring shunt. This allows for monitoring of the load applied to the solenoid.
  • solenoid and the measuring shunt are connected in parallel with the second transistor, in order to provide protection against fly back voltage spikes.
  • the driving unit comprises an interface for receiving command instructions for the solenoid device and/or sending status information about the solenoid device, in particular via a field bus, preferably a CAN-bus or FlexRay-bus. This allows for connecting the solenoid device to other controller devices, in particular for automotive applications, in a standardized way.
  • driving unit in the solenoid's housing comprises a communication circuit providing the interface, said interface being in particular in form of a CAN-bus or FlexRay-bus socket.
  • the communications circuit can translate external control commands to internal commands for the drivers and relate internal status information of the driving unit to external devices.
  • the driving unit is constructed as an integrated circuit. This allows for a particularly compact form of the driving unit, and thus of the overall solenoid device.
  • the solenoid device shown in Fig. 2 comprises a solenoid S, which is arranged in a housing 10.
  • a driving unit 12 is connected to terminal connectors A, B of the solenoid S and arranged in the housing 10 together with the solenoid S.
  • the driving unit 12 is connected to an external printed circuit board, PCB, 18, which provides connectors 14 for a power supply and connectors 16 for control signals. Since the driving unit 12 is integrated with the solenoid housing 10, the external circuit board 18 can be smaller than in case of the prior art shown in Fig. 1 and can be independent from the type of solenoid S.
  • the driving unit 12 comprises a high side switch driver 20 connected to a MOSFET T1.
  • the high side switch driver 20 activates the MOSFET T1
  • the terminal connector A of the solenoid S is connected to the high potential level of the power supply (usually between 10 V and 15 V), while the terminal connector B is connected to ground via a measuring shunt R S .
  • a further MOSFET T2 can be activated via a free wheeling diode driver 22.
  • the MOSFET T2 is connected in parallel to the solenoid S and the measuring shunt R S and acts as a flyback diode preventing flyback voltage spikes upon deactivation of the solenoid S. It can further be utilized to maintain current flow through the solenoid S.
  • a low side switch driver 24 controls a third MOSFET T3.
  • the MOSFET T3 When activated, the MOSFET T3 connects the terminal connector B of the solenoid to ground via the measuring shunt R S , while the terminal connector A of the solenoid is connected to the high potential level of the power supply.
  • a connector pin 19 of the driving unit 20 can receive an external signal to control the driving mode or can be hardwired to either ground or high potential to set a fixed driving mode for the solenoid S.
  • the first MOSFET T1 When in high side mode, the first MOSFET T1 provides control for the solenoid S.
  • the MOSFET T3 is not used for control purposes in this arrangement, but rather provides a protective function by disconnecting the solenoid from ground in case of a malfunction, like an overcurrent, a short circuit on the solenoid or a defect of the low side switch driver 24.
  • the drivers 20, 22, 24 provide pulse-width modulated (PWM) signals to the respective gates of MOSFETS T1, T2, T3 in order to activate or deactivate them. Since the MOSFETS are activated and deactivated in synchronization with the PWM signal, the resulting potential to the solenoid S also follows the PWM signal. Due to the inductivity of the solenoid S, the signal is smoothed, so that the resulting magnetic field is largely constant. The resulting field strength can be modulated by changing the duty cycle of the PWM signal.
  • PWM pulse-width modulated
  • a current measurement block 26 can monitor the voltage drop over the measuring shunt R S in order to determine the load applied to the solenoid S.
  • Control signals for the drivers 20, 22, 24 can be received via a communication circuit 28, which also can relay back internal information of the driving unit 12 to external devices.
  • the communication circuit 28 is coupled to the connectors 16, which preferably provide a CAN- or FlexRay-bus interface for automotive applications.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Magnetically Actuated Valves (AREA)
EP16465562.3A 2016-12-21 2016-12-21 Solenoidvorrichtung Active EP3340259B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP16465562.3A EP3340259B1 (de) 2016-12-21 2016-12-21 Solenoidvorrichtung
DE102017222521.1A DE102017222521A1 (de) 2016-12-21 2017-12-12 Solenoidvorrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16465562.3A EP3340259B1 (de) 2016-12-21 2016-12-21 Solenoidvorrichtung

Publications (2)

Publication Number Publication Date
EP3340259A1 true EP3340259A1 (de) 2018-06-27
EP3340259B1 EP3340259B1 (de) 2019-09-25

Family

ID=57960217

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16465562.3A Active EP3340259B1 (de) 2016-12-21 2016-12-21 Solenoidvorrichtung

Country Status (1)

Country Link
EP (1) EP3340259B1 (de)

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2352381A1 (fr) * 1976-05-21 1977-12-16 Telemecanique Electrique Bobine d'electro-aimant
US5538220A (en) * 1994-10-21 1996-07-23 Automatic Switch Company Molded solenoid valve and method of making it
DE19647215A1 (de) * 1996-01-19 1997-07-24 Festo Kg Schaltungsanordnung zur Steuerung von Magnetventilen
EP0883142A2 (de) * 1997-03-14 1998-12-09 Smc Corporation Solenoid für Magnetventil
EP0947408A2 (de) * 1998-03-30 1999-10-06 Siemens Aktiengesellschaft Steuergerät für eine hydraulische Bremssteuerung und Herstellungsverfahren
US6059382A (en) * 1997-02-04 2000-05-09 Siemens Aktiengesellschaft Control device for an antilocking system and process for producing a control device
US20060070591A1 (en) * 2004-10-04 2006-04-06 Merwin Jeffrey D Quasi resonant gate controller for a power driver
EP1903581A2 (de) * 2006-09-22 2008-03-26 Eaton Corporation Magnetspulenanordnung mit umgossener Elektronik
EP2110820A2 (de) * 2008-04-18 2009-10-21 Siemens Energy & Automation, Inc. Eigensichere Schaltung zur Ansteuerung eines Magnetventils bei niedriger Leistung
WO2010029133A1 (de) * 2008-09-11 2010-03-18 Continental Automotive Gmbh Verfahren zum herstellen einer ventilsteuereinheit und ventilsteuereinheit, stossdämpfer und kraftfahrzeug mit ventilsteuereinheit
DE102011087368A1 (de) * 2010-11-30 2012-05-31 Infineon Technologies Ag Anordnung und verfahren zum bootstrapping eines schaltertreibers
WO2012125102A1 (en) * 2011-03-16 2012-09-20 Digisign Ab Method and apparatus for controlling the position of an armature in an electromagnetic actuator
US20140238494A1 (en) * 2013-02-26 2014-08-28 Infineon Technologies Ag Current driving system for a solenoid
WO2014134500A1 (en) * 2013-02-28 2014-09-04 Tenneco Automotive Operating Company Inc. Damper with integrated electronics
US20140290771A1 (en) * 2013-03-28 2014-10-02 Thomas Magnete Gmbh Pressure-Regulating Valve Having An Electrical Control Unit

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2352381A1 (fr) * 1976-05-21 1977-12-16 Telemecanique Electrique Bobine d'electro-aimant
US5538220A (en) * 1994-10-21 1996-07-23 Automatic Switch Company Molded solenoid valve and method of making it
DE19647215A1 (de) * 1996-01-19 1997-07-24 Festo Kg Schaltungsanordnung zur Steuerung von Magnetventilen
US6059382A (en) * 1997-02-04 2000-05-09 Siemens Aktiengesellschaft Control device for an antilocking system and process for producing a control device
EP0883142A2 (de) * 1997-03-14 1998-12-09 Smc Corporation Solenoid für Magnetventil
EP0947408A2 (de) * 1998-03-30 1999-10-06 Siemens Aktiengesellschaft Steuergerät für eine hydraulische Bremssteuerung und Herstellungsverfahren
US20060070591A1 (en) * 2004-10-04 2006-04-06 Merwin Jeffrey D Quasi resonant gate controller for a power driver
EP1903581A2 (de) * 2006-09-22 2008-03-26 Eaton Corporation Magnetspulenanordnung mit umgossener Elektronik
EP2110820A2 (de) * 2008-04-18 2009-10-21 Siemens Energy & Automation, Inc. Eigensichere Schaltung zur Ansteuerung eines Magnetventils bei niedriger Leistung
WO2010029133A1 (de) * 2008-09-11 2010-03-18 Continental Automotive Gmbh Verfahren zum herstellen einer ventilsteuereinheit und ventilsteuereinheit, stossdämpfer und kraftfahrzeug mit ventilsteuereinheit
DE102011087368A1 (de) * 2010-11-30 2012-05-31 Infineon Technologies Ag Anordnung und verfahren zum bootstrapping eines schaltertreibers
WO2012125102A1 (en) * 2011-03-16 2012-09-20 Digisign Ab Method and apparatus for controlling the position of an armature in an electromagnetic actuator
US20140238494A1 (en) * 2013-02-26 2014-08-28 Infineon Technologies Ag Current driving system for a solenoid
WO2014134500A1 (en) * 2013-02-28 2014-09-04 Tenneco Automotive Operating Company Inc. Damper with integrated electronics
US20140290771A1 (en) * 2013-03-28 2014-10-02 Thomas Magnete Gmbh Pressure-Regulating Valve Having An Electrical Control Unit

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