EP2513938B1 - Dispositif pour un appareil de coupure électromagnetic - Google Patents

Dispositif pour un appareil de coupure électromagnetic Download PDF

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Publication number
EP2513938B1
EP2513938B1 EP10704533.8A EP10704533A EP2513938B1 EP 2513938 B1 EP2513938 B1 EP 2513938B1 EP 10704533 A EP10704533 A EP 10704533A EP 2513938 B1 EP2513938 B1 EP 2513938B1
Authority
EP
European Patent Office
Prior art keywords
switch
coil
current
control signal
pick
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.)
Not-in-force
Application number
EP10704533.8A
Other languages
German (de)
English (en)
Other versions
EP2513938A1 (fr
Inventor
Venkatramani Subramaniam
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP2513938A1 publication Critical patent/EP2513938A1/fr
Application granted granted Critical
Publication of EP2513938B1 publication Critical patent/EP2513938B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
    • H01H47/04—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for holding armature in attracted position, e.g. when initial energising circuit is interrupted; for maintaining armature in attracted position, e.g. with reduced energising current

Definitions

  • the present invention relates to an apparatus for driving a coil of an electromagnetic switching device.
  • An electromagnetic switching device is typically used for controlling flow of electrical current in an electrical circuit.
  • the electromagnetic switching device is controllable for switching between on and off states for closing and breaking a power supply circuit.
  • the electromagnetic switching device may be manually or electrically controlled.
  • magnets may be employed to actuate a movable contact element for breaking and closing the power supply circuit.
  • the movable contact element is moved to engagement with a stationary contact element for closing the power supply circuit.
  • the stationary contact element is electrically connected to the power supply.
  • the power supply circuit is closed when movable contact element is in engagement with the stationary contact element.
  • the magnets employed to actuate the movable contact element are energized by a coil.
  • the coil is energized by a current flowing through the coil.
  • DE 299 09 904 U1 discloses an apparatus for driving a coil which reduces electrical losses at switches.
  • switches are controlled based on pre-determined switching time.
  • the first switch supplies the pick-up current to the coil and the second switch supplies the hold-on current to the coil.
  • the pick-up current is the current required for energizing the coil for the circuit closing motion of the contact element.
  • the hold-on current is the current required for maintaining the contact element in the circuit closing position.
  • the first switch and the second switch may be controlled responsive to a current flowing through the coil. Providing the pick-up current using the first switch and the hold-on current using the second switch enables in reducing the electrical losses at the switches as the heat dissipation is reduced at the switches.
  • a controller is configured to detect decrease in the current flowing through the coil, and turn-off the first switch and turn-on the second switch upon detecting decrease in the current flowing through the coil.
  • the first switch and the second switch are different with respect to a switching frequency.
  • the pick-up current is typically of a higher value than the hold-on current, the switches having different switching frequencies enable in efficient operation of the switches.
  • the first switch and the second switch are solid state switches.
  • the first switch and the second switch being connected in parallel to each other. Connecting the first switch and the second switch in parallel enables in achieving two different current paths from the supply source. This enables in controlling the pick-up current and the hold-on current provided to the coil.
  • the first switch and the second switch connected in parallel is connected in series to the coil. Connecting the parallel connected first switch and the second switch in series with the coil enables in providing the pick-up current and the hold-on current over two different current paths.
  • the apparatus may further comprises a controller configured to provide a fist control signal to the first switch and a second control signal to the second switch responsive to the current flowing through the coil.
  • the controller responsive to the current flowing though the coil may provide the first control signal to the first switch and the second control signal to the second switch for controlling the switches respectively.
  • the first control signal is provided to the first switch for providing the pick-up current the coil.
  • the first control signal is provided to the first switch responsive to the current flowing through the coil. This enables in controlling the first switch for providing the pick-up current to the coil.
  • the first switch is adapted to be in an on state during a circuit closing motion of a contact element.
  • the first switch adapted to be in an on state during the circuit closing motion enables in providing the pick-up current to the coil.
  • the second control signal is provided to the second switch for providing the hold-on current to the coil.
  • the second control signal is provided to the second switch responsive to the current flowing through the coil. This enables in controlling the second switch for providing the hold-on current to the coil.
  • the second switch is adapted to perform a high frequency switching responsive to the second control signal. Performing a high frequency switching responsive to the second control signal enables in reducing the current provided to the coil and thus, provide the hold-on current to the coil.
  • the second control signal is a pulse width modulated signal.
  • the pulse width modulated signal enables the switch to perform high frequency switching based responsive to the widths of the pulses.
  • the switching frequency of the first switch is less than the second switch.
  • the first switch providing the pick-up may not be required to perform high frequency switching.
  • the switching frequency of the first switch may be lower than the switching frequency of the second switch. This enables in reducing the electrical losses at the first switch.
  • the first switch is selected from the group consisting of a transistor, and an IGBT.
  • the first switch being a transistor or an IGBT may operate efficiently to supply the pick-up current as the pick-up current is of a higher value than the hold-on current.
  • the second switch is an MOSFET.
  • the second switch being an MOSFET may operate efficiently to supply the hold-on current as MOSFET operate efficiently at high switching frequency.
  • Another embodiment includes, an electromagnetic switching device comprising the apparatus according to any of the claims 1 to 14.
  • a carrier 1 of an electromagnetic switching device is illustrated according to an embodiment herein.
  • a contact element 3 is supported in the carrier to be movable form a circuit breaking position to a circuit closing position, wherein the contact element 3 is moved to be in contact with a stationary contact element to be in the circuit closing position.
  • the stationary contact may be connected to the input power supply.
  • FIG 1b illustrates an assembly of an electromagnet system and the carrier 1 of FIG 1a according to an embodiment herein.
  • the carrier 1 comprises a column 7 extending vertically upwards.
  • the electromagnet system 8 is supported on the column 7 to actuate the carrier.
  • the electromagnet system 8 is shown as comprising electromagnetic armatures 9, 13.
  • the electromagnet system 8 may be designed in another way comprising fewer or more electromagnetic armatures.
  • the electromagnetic armatures 9, 13 are adapted to actuate the carrier 1.
  • the electromagnetic armature 9 engages the column 7 via a member 11 for transferring the armature 9 movement to the carrier 1.
  • the carrier 1 in turn moves the contact element 3 into the circuit closing position.
  • the electromagnetic armature 9 is in engagement with the column mechanically via the member 11.
  • the electromagnetic armature 9 may be engaged with the column 7 using other known mechanical means.
  • Another electromagnetic armature 13 comprising coils 17 is also supported on the column 7.
  • the magnetic armature may comprise only a single coil 17.
  • the coils 17 are energized by supplying a current provided by a supply source.
  • the electromagnetic armature 9 is drawn towards the electromagnetic armature 13. This movement of the armature 9 is transferred to the carrier 1 and to the contact element 3 for the circuit closing motion.
  • the carrier 1 may comprise a column extending vertically downwards and the electromagnetic armature 9 and the electromagnetic armature 13 may be supported on the column.
  • the contact element 3 In the circuit closing motion, the contact element 3 is moved to be in contact with the stationary contact element.
  • the contact element 3 in contact with the stationary contact element is said to be in the circuit closing position.
  • the current required for energizing the coil 17 for the circuit closing motion of the contact element 3 is hereinafter referred to as a pick-up current.
  • the current required for energizing the coil 17 such that the contact element 3 is maintained at the circuit closing position is referred to as a hold-on current.
  • FIG 2 illustrates a schematic diagram of an apparatus 18 for supplying the pick-up current and the hold-on current to the coil according to an embodiment herein.
  • a pick-up current for energizing the coil 17 is provided to the coil 17 using a switch 19 and a hold-on current is provided by a switch 21.
  • the switch 19 is operable for providing the pick-up current to the coil 17 during circuit closing motion and the switch 21 is operable for providing the hold-on current to the coil 17 for maintaining the contact element 3 of FIG 1a in a circuit closing position.
  • the switch 19 and the switch 21 may be solid state static switches.
  • a controller 23 is configured to control the switch 19 for providing the pick-up current to the coil 17 during circuit closing motion and the switch 21 for providing the hold-current to the coil 17 for maintaining the contact element 3 of FIG 1 at the circuit closing position.
  • the controller 23 controls the switch 19 and switch 21 responsive to the current flowing in the coil 17.
  • the current flowing in the coil 17 is provided to the controller 23 by a conditioning circuit 25.
  • the controller 23 may be a processor, a microcontroller, and the like.
  • the conditioning circuit 25 is connected at A across a resistor R27 on the circuit providing the current to the coil 17.
  • a voltage across A is conditioned by the conditioned circuit 25 and is thereafter, provided to the controller 23.
  • the controller 23 determines the current flowing through the coil 17 responsive to the output of the conditioning circuit 25.
  • the pick-up current is to be provided to the coil 17 for energizing the coil 17.
  • the switch 19 is turned on to provide the pick-up current to the coil 17.
  • the controller 23 may control the switch 19 by providing a first control signal. Once, the contact element 3 is in contact with the stationary contact element, the current flowing through the coil 17 decreases. This decrease in the current flowing through the coil 17 is detected by the controller 23.
  • the controller 23 in response to the decrease in the current turns off the switch 19 and turns on the switch 21.
  • the switch 21 is operable for high frequency switching to provide the hold-on current to the coil 17.
  • the switch 21 performs the high frequency switching responsive to a second control signal, such as a PWM pulse, provided by the controller 23.
  • the high frequency switching performed by the switch 21 reduces the current flowing through the coil 17 and thus provides the hold-on current to the coil 17 to maintain the contact element 3 in the circuit closing position.
  • the use of two switches 19, 21 for providing the pick-up current and the hold-on current to the coil 17 respectively reduces electrical losses occurring at the switches 19, 21.
  • the switch 19 may be a solid state static switch selected such that it is suitable for carrying high currents and the switch 21 may be a solid state static switch selected such that it is capable of performing high frequency switching with minimum switching loses.
  • the switching frequency of the first switch 19 may be less than the switching frequency of the second switch 21.
  • the switch 19 may be a transistor, such as an IGBT and the switch 21 may be an MOSFET.
  • An IGBT is capable of carrying high currents and an MOSFET is capable of performing high frequency switching with minimum switching loses.
  • the switch 19 is suitable for carrying high currents and the switch 21 is suitable for high frequency switching with minimum switching loses
  • the electrical losses occurring at the switches 19, 21 are reduced, thus reducing the heat dissipation at the switches 19, 21.
  • This enables in eliminating the requirement of using bulky heat sinks and thus reduction in size of the electromagnetic switching device. Additionally, the longevity of the switches 19, 21 is increased due to the reduction in heat generated.
  • the switch 19 may be turned on to provide the pick-up current to the coil 17 and the switch 21 also may be turned on to carry a fraction of the pick-up current.
  • the controller 23 may provide control signals to the first switch 19 and the second switch 21 respectively to turn on both the switches 19, 21 during circuit closing motion. This enables in further reducing the electrical losses at the switch 19, thus reducing the heat generated at the switch 19.
  • the switch 21 may be turned on to provide the hold-on current to the coil 17 and the switch 19 may also be turned on to carry a fraction of the hold-on current.
  • the controller 23 may provide control signals to the first switch 19 and the second switch 21 respectively to turn on both the switches 19, 21 for maintaining the contact element 3 in circuit closing position. This enables in further reducing the electrical loses at the switch 21, thus reducing heat generated at the switch 21.
  • the embodiments described herein enable reducing electrical losses occurring at the switch, thereby reducing the heat dissipation at the switch. This enables in eliminating the requirement of using bulky heat sinks and thus reduction in size of the electromagnetic switching device. Additionally, the longevity of the switches is increased due to the reduction in the heat dissipated. This enables in providing efficient switching in order to provide the pick-up current and the hold-on current to the coil.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Relay Circuits (AREA)

Claims (14)

  1. Appareil (18) destiné à exciter une bobine (17) d'un dispositif de commutation électromagnétique, l'appareil (18) comprenant :
    un premier commutateur (19) pour fournir un courant d'excitation à la bobine (17),
    un deuxième commutateur (21) pour fournir un courant de maintien à la bobine (17), et
    dans lequel le premier commutateur (19) et le deuxième commutateur (21) diffèrent par une fréquence de commutation,
    caractérisé en ce que le premier commutateur (19) et le deuxième commutateur (21) sont contrôlables en réponse à un courant circulant à travers la bobine (17) et
    par un contrôleur (23) configuré pour détecter une diminution du courant circulant à travers la bobine (17), et configuré pour fermer le premier commutateur (19) et ouvrir le deuxième commutateur (21) en réponse à la diminution détectée du courant circulant à travers la bobine (17).
  2. Appareil (18) selon la revendication 1, dans lequel le premier commutateur (19) et le deuxième commutateur (21) sont des commutateurs à semiconducteurs.
  3. Appareil (18) selon l'une quelconque des revendications 1 à 2, dans lequel le premier commutateur (19) et le deuxième commutateur (21) sont branchés en parallèle l'un à l'autre.
  4. Appareil (18) selon la revendication 3, dans lequel le premier commutateur (19) et le deuxième commutateur (21) branchés en parallèle sont branchés en série à la bobine (17).
  5. Appareil (18) selon la revendication 1, dans lequel le contrôleur (23) est configuré pour fournir un premier signal de commande au premier commutateur (19) et un deuxième signal de commande au deuxième commutateur (21) en réponse au courant circulant à travers la bobine (17).
  6. Appareil (18) selon la revendication 5, dans lequel le premier signal de commande est fourni au premier commutateur (19) pour fournir le courant d'excitation à la bobine.
  7. Appareil (18) selon l'une quelconque des revendications 1 à 6, dans lequel le premier commutateur (19) est adapté pour être dans un état passant pendant un mouvement de fermeture de circuit d'un élément de contact (3).
  8. Appareil (18) selon l'une quelconque des revendications 5 à 7, dans lequel le deuxième signal de commande est fourni au deuxième commutateur (21) pour fournir le courant de maintien à la bobine (17).
  9. Appareil (18) selon l'une quelconque des revendications 5 à 7, dans lequel le deuxième commutateur (21) est adapté pour effectuer une commutation à haute fréquence en réponse au deuxième signal de commande.
  10. Appareil (18) selon l'une quelconque des revendications 5 à 9, dans lequel le deuxième signal est un signal modulé en largeur d'impulsion.
  11. Appareil (18) selon l'une quelconque des revendications 1 à 10 dans lequel la fréquence de commutation du premier commutateur (19) est inférieure à celle du deuxième commutateur (21).
  12. Appareil (18) selon l'une quelconque des revendications 1 à 11, dans lequel le premier commutateur (19) est choisi dans le groupe constitué par un transistor, et un IGBT.
  13. Appareil (18) selon l'une quelconque des revendications 1 à 12, dans lequel le deuxième commutateur (21) est un MOSFET.
  14. Dispositif de commutation électromagnétique comprenant l'appareil (18) selon l'une quelconque des revendications précédentes.
EP10704533.8A 2010-02-08 2010-02-08 Dispositif pour un appareil de coupure électromagnetic Not-in-force EP2513938B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2010/051477 WO2011095223A1 (fr) 2010-02-08 2010-02-08 Appareil pour un dispositif de commutation électromagnétique

Publications (2)

Publication Number Publication Date
EP2513938A1 EP2513938A1 (fr) 2012-10-24
EP2513938B1 true EP2513938B1 (fr) 2018-07-04

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ID=42735628

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10704533.8A Not-in-force EP2513938B1 (fr) 2010-02-08 2010-02-08 Dispositif pour un appareil de coupure électromagnetic

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EP (1) EP2513938B1 (fr)
CN (1) CN102754176B (fr)
WO (1) WO2011095223A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3006817B1 (fr) * 2013-06-10 2016-11-18 Hispano Suiza Sa Dispositif et procede d'assistance d'un systeme de generation electrique d'un aeronef
US9589753B2 (en) 2013-11-12 2017-03-07 Abb Schweiz Ag Method for controlling a contactor device, and control unit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5053911A (en) * 1989-06-02 1991-10-01 Motorola, Inc. Solenoid closure detection
DE29909904U1 (de) * 1999-06-08 1999-09-30 Moeller GmbH, 53115 Bonn Antriebssteuerung
DE19935045A1 (de) * 1999-07-26 2001-02-01 Moeller Gmbh Elektronische Antriebssteuerung
EP1109178A3 (fr) * 1999-12-16 2002-04-17 Siemens Aktiengesellschaft Procédé pour commuter une charge inductive
JP2008192481A (ja) * 2007-02-06 2008-08-21 Yazaki Corp リレー制御装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2011095223A1 (fr) 2011-08-11
EP2513938A1 (fr) 2012-10-24
CN102754176A (zh) 2012-10-24
CN102754176B (zh) 2015-12-02

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