EP3363036B1 - Dispositif de commande pour un entraînement électromagnétique d'un appareil de commutation - Google Patents

Dispositif de commande pour un entraînement électromagnétique d'un appareil de commutation Download PDF

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Publication number
EP3363036B1
EP3363036B1 EP16781711.3A EP16781711A EP3363036B1 EP 3363036 B1 EP3363036 B1 EP 3363036B1 EP 16781711 A EP16781711 A EP 16781711A EP 3363036 B1 EP3363036 B1 EP 3363036B1
Authority
EP
European Patent Office
Prior art keywords
voltage
power supply
drive
direct voltage
supply unit
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.)
Active
Application number
EP16781711.3A
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German (de)
English (en)
Other versions
EP3363036A1 (fr
Inventor
Ingo Schaar
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 Intelligent Power Ltd
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Eaton Intelligent Power Ltd
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Filing date
Publication date
Application filed by Eaton Intelligent Power Ltd filed Critical Eaton Intelligent Power Ltd
Priority to PL16781711T priority Critical patent/PL3363036T3/pl
Publication of EP3363036A1 publication Critical patent/EP3363036A1/fr
Application granted granted Critical
Publication of EP3363036B1 publication Critical patent/EP3363036B1/fr
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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
    • 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
    • H01H47/002—Monitoring or fail-safe circuits

Definitions

  • the invention relates to a control device for an electromagnetic drive of a switching device, in particular a contactor, which is provided for supplying energy to the drive, as well as a switching device with such a control device.
  • electromagnetic drives of switching devices such as contactors are supplied with different voltages depending on the drive mode: in pull-up mode, the coil of an electromagnetic drive is supplied with a pull-in voltage, which generates a corresponding pull-in energy to apply the pull-in forces of the switching device; As soon as the contacts of the switching device are closed, the pull-in voltage can be reduced to a holding voltage in order to switch the drive to holding mode.
  • the holding energy generated by the holding voltage is less than the pull-in energy, since less energy is required for safe "holding closed".
  • the pull-in and hold voltage can be generated by pulse-width modulation (PWM), see for example that from the German patent application DE 195 16 995 A1 known contactor control.
  • PWM pulse-width modulation
  • the German Offenlegungsschrift DE 102 27 278 A1 discloses a relay control which has a control device with a voltage regulator controlled by a computing unit. When it is switched on, the voltage regulator initially generates a minimum switch-on voltage for the relay. After switching on, the voltage regulator reduces the supply voltage of the relay to a minimum holding voltage or increases the supply voltage to a full battery voltage.
  • German Offenlegungsschrift DE 10 2006 005 267 A1 describes a control device for relays which has a switched-mode power supply, controlled by a microcontroller, for supplying voltage to the relay coils.
  • the microcontroller controls the switched-mode power supply in such a way that it generates either a pull-in or a holding voltage.
  • the object of the present invention is now to propose an improved control device for an electromagnetic drive of a switching device, in particular a contactor, and an improved switching device.
  • One idea on which the present invention is based is to equip a control device for an electromagnetic drive of a switching device with a power supply unit that generates a pull-in and a holding DC voltage as a function of a control signal generated by a control unit.
  • the power supply unit can also be designed to supply voltage to the control unit.
  • the use of a power supply unit as opposed to a PWM-based generation of the pull-in and holding voltage has the advantage that fewer problems arise with EMC (electromagnetic compatibility) of a switching device, which are primarily caused by steep edges in PWM-based pull-in and holding voltage generation .
  • Another advantage of the invention can be seen in the fact that the use of a single power supply unit, which generates a pull-in and hold DC voltage for the switchgear drive, enables a relatively compact design of the control electronics of a switchgear to be achieved due to the smaller space requirement which in turn improves the EMC behavior through smaller air and creepage distances between individual components and a reduction in the number of components can be achieved.
  • One embodiment of the invention now relates to a control device for an electromagnetic drive of a switching device having a power supply unit for generating a pull-in and holding DC voltage for the electromagnetic drive of the switching device as a function of a control signal and a control unit for generating the control signal.
  • a control device enables a compact design of the control electronics of a switching device, in particular a contactor, since the energy for the pick-up operation and the power for the holding operation of the switching device are generated by a power supply unit.
  • the control unit is also designed to generate a second control signal for controlling a switch for connecting or disconnecting the drive from the pull-in or holding DC voltage generated by the power supply unit, depending on a measurement voltage derived from an input voltage of the control device.
  • the power supply is a switched-mode power supply that is designed for an input voltage range that is adapted to the operating voltage range of the switching device, the input voltage range being approximately 48 volts to approximately 240 volts, approximately 110 volts to approximately 240 volts or approximately 24 volts to approximately 240 volts .
  • a multi-voltage switching device can be created that is suitable for operation with a wide variety of mains voltages. This ultimately enables a minimization of the variants of switching devices.
  • control unit can be designed to generate the control signal in such a way that the power supply unit generates a DC pull-in voltage for the drive when at least one pull-in condition is met and a DC hold-in voltage for the drive when at least one stop condition is met.
  • the at least one tightening condition can include reaching a minimum input voltage and / or minimum output voltage of the power supply unit, and the at least one Holding condition the expiry of a specified time after the at least one tightening condition has been met.
  • control unit can be designed to generate the second control signal for activating the switch for disconnecting the drive from the pull-in or holding DC voltage generated by the power supply unit when the measurement voltage signals that a predetermined minimum voltage is not reached. This ensures that the power supply unit is safely decoupled from the drive and is no longer loaded by it when the input voltage falls below the specified minimum voltage.
  • a quick de-energization unit can be provided for de-energizing a coil of the drive, which is automatically activated when the coil is disconnected from the pull-in or holding DC voltage generated by the power supply unit.
  • the quick de-excitation can have a diode and a Zener diode, which are connected as a series circuit in parallel to the coil of the drive. The fast de-excitation can thus be implemented with little circuitry effort.
  • Another embodiment of the invention relates to a switching device, in particular a contactor, with a switching drive, which has a coil, and a control device according to the invention and as described herein for controlling the power supply to the coil.
  • the switching device can also have a rectifier for generating a rectified output voltage from an alternating voltage in a predetermined input voltage range, the output voltage being fed to the power supply unit of the control device.
  • the control unit of the control device can have a microprocessor or microcontroller which is configured by a program stored in a memory to generate a control signal for controlling the generation of a pull-in voltage and a holding DC voltage by the power pack in such a way that the power pack when tightening conditions are met a pull-in DC voltage for the drive and, if the holding conditions are met, a holding DC voltage for the drive is generated.
  • Fig. 1 shows a block diagram of a control device or control electronics according to the invention, which in principle is designed for a wide input voltage range and can be implemented in a relatively compact manner on a circuit board.
  • the control device is suitable, for example, for integration in a switching device such as a contactor. It makes it possible to generate the energy for the pick-up and hold operation of an electromagnetic switching device drive from a power supply unit, in particular without the use of PWM (on the drive), which can improve the EMC behavior.
  • the control device comprises a power supply unit 10, a control unit 16, implemented for example by a microcontroller with memory, a quick de-energizing unit 22 and a controllable switch 18.
  • the in Fig. 1 shown rectifier 24 belongs strictly speaking, not to the control device, but can nevertheless be provided on a circuit board of the control device. All voltages and signals of the control device are related to a reference potential (eg ground).
  • the rectifier 24 is fed via a voltage applied to the connections A1 and A2, for example an alternating voltage (within or outside the usual 50 Hz or 60 Hz) or also a direct voltage.
  • the output voltage generated from the voltage by the rectifier 24 feeds the power supply unit 10, which uses it to generate an output voltage for supplying the control unit 16 and a coil 12 of an electromagnetic drive of a switching device (not shown).
  • the rapid de-energizing unit 22 is connected in parallel with the coil 12.
  • the controllable switch 18 is connected between the coil 12 and the ground, for example a switching transistor with a corresponding current carrying capacity and suitability for the voltages that occur.
  • the function of the control device is now based on the in Fig. 2
  • the illustrated time diagram of an exemplary curve of the output voltage generated by the power supply unit 10 for supplying the coil 12 of the drive is explained:
  • the output voltage generated by the rectifier 24 from the applied voltage is fed on the input side to the power supply unit 10, which uses it to generate an output DC voltage that increases over time and its exemplary curve in the time diagram of FIG Fig. 2 is shown.
  • control unit 16 As soon as the output voltage of the power supply unit 10 is sufficient to supply the control unit 16 (time t1 in the timing diagram), the control is started, in particular by a microcontroller implementing the control unit 16 starting the execution of firmware stored in its memory.
  • the control unit 16 When the control unit 16 is working, it measures a measurement voltage 20 derived from the voltage generated by the rectifier 24.
  • the Measurement voltage 20 can be derived from the voltage generated by rectifier 24 via a voltage divider, which, depending on the input voltage, can have very high values that may be too high for direct processing by control unit 16.
  • the control unit 16 controls the connection or disconnection of the coil 12 of the drive from the voltage supply of the power supply unit 10. If the measurement voltage 20 exceeds a predetermined minimum voltage, the control unit can switch the coil 12 via the controllable switch 18 into the supply path of the power supply unit 10 via a corresponding second control signal 15 by closing the connection of the coil 12 to ground. Conversely, the control unit 16 switches off the supply of the coil 12 via the second control signal 15 by opening the switch 18 when the voltage falls below the predetermined minimum.
  • the specified minimum voltage is determined depending on the parameters of the drive.
  • the control unit 16 now continues to monitor the output direct voltage generated by the power supply unit 10 and which continues to rise. As soon as the output DC voltage exceeds a minimum value that is sufficient and specified for the switching device to operate in pick-up mode, a pick-up condition is met (time t2 in the timing diagram), and the control unit 16 generates a control signal 14 such that the power supply unit 10 is activated by the control signal 14 in a mode is switched in which it now generates and outputs the achieved output DC voltage as a pull-in DC voltage for the switching drive of the switching device.
  • control unit 16 now generates the second control signal 15 in such a way that the controllable switch 18 is closed, whereby the coil 12 can be connected to the ground and thus supplied by the DC pull-in voltage of the power supply 10, so that a corresponding pull-in current through the coil 12 flows and the drive of the switching device is moved to close the switching contacts.
  • a timer is started in the control unit 16, which timer runs a predetermined time after the generation of the control signal 14 for generating and outputting the pull-in DC voltage.
  • the specified time depends on the switching drive and the duration in such a way that it takes the time to close the switching contacts of the switching device (typically corresponds to the activation time of the switching drive).
  • the control unit 16 When the timer and thus the time specified by it expires, a hold condition is fulfilled, and the control unit 16 generates the control signal 14 in such a way that the power supply unit 10 is switched by the control signal 14 into a mode in which it is now an output DC voltage Holding DC voltage generated and output for the switching drive of the switching device, which is lower than the pull-in DC voltage (time t3 in the time diagram).
  • the power supply 10 lowers its output DC voltage to the holding DC voltage and now outputs the holding DC voltage as long as a voltage in the specified input voltage range is present at the connections A1 and A2 and the switching contacts of the switching device should remain closed.
  • the control unit 16 switches off the switching drive by generating and outputting the second control signal 15, that the controllable switch 18 is opened. After the switch 18 is opened, the rapid de-energization 22 is automatically activated, via which the energy stored in the coil 12 is discharged.
  • the main advantages of the present invention consist in a simplification of the circuit of the control device and the robustness associated therewith, a possible minimization of the circuit variants, an improvement in the EMC behavior and the possibility of implementing a multi-voltage switching device that is suitable for a large input voltage range suitable is. Further advantages can be seen in the fact that the coil types of the electromagnetic drive of a switching device can be reduced, since a separate coil no longer has to be used for each input voltage range, but one coil can be used for several input voltage variants, the number of components can be reduced, and a more compact structure is made possible, which leads to smaller air and creepage distances and thus an improved EMC behavior and has a lower space requirement.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Relay Circuits (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)

Claims (8)

  1. Dispositif de commande pour un entraînement électromagnétique d'un appareil de commutation, présentant
    • un bloc d'alimentation (10) destiné à générer une tension continue de démarrage et une tension continue de maintien pour l'entraînement électromagnétique (12) de l'appareil de commutation en fonction d'un signal de commande (14) et
    • une unité de commande (16) destinée à générer le signal de commande (14) et qui est conçue pour générer un second signal de commande (15) destiné à commander un interrupteur (18) afin qu'il connecte ou déconnecte l'entraînement (12) à ou de la tension continue de démarrage ou de maintien générée par le bloc d'alimentation (10),
    caractérisé en ce que
    • le bloc d'alimentation (10) est un bloc d'alimentation à découpage conçu pour une plage de tension d'entrée adaptée à la plage de tension de fonctionnement de l'appareil de commutation, dans lequel la plage de tension d'entrée est comprise entre environ 48 volts et environ 240 volts, entre environ 110 volts et environ 240 volts ou entre environ 24 volts et environ 240 volts, et
    • l'unité de commande (16) est conçue pour générer le second signal de commande (15) en fonction d'une tension de mesure (20) dérivée d'une tension d'entrée du dispositif de commande.
  2. Dispositif de commande selon la revendication 1,
    caractérisé en ce que
    l'unité de commande (16) est conçue pour générer le signal de commande (14) de telle manière que le bloc d'alimentation (10) génère une tension continue de démarrage pour l'entraînement (12) lorsqu'au moins une condition de démarrage est remplie et une tension continue de maintien pour l'entraînement (12) lorsqu'au moins une condition de maintien est remplie.
  3. Dispositif de commande selon la revendication 2,
    caractérisé en ce que
    la au moins une condition de démarrage comprend l'obtention d'une tension d'entrée minimale et/ou d'une tension continue de sortie minimale du bloc d'alimentation, et
    la au moins une condition de maintien comprend l'expiration d'un temps prédéfini après que la au moins une condition de démarrage a été remplie.
  4. Dispositif de commande selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    l'unité de commande (16) est conçue pour générer le second signal de commande (15) destiné à actionner l'interrupteur (18) afin de déconnecter l'entraînement (12) de la tension de démarrage ou de maintien générée par le bloc d'alimentation (10) lorsque la tension de mesure (20) signale que la tension descend en dessous d'une tension minimale prédéfinie.
  5. Dispositif de commande selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    une unité de désexcitation rapide (22) est prévue, qui est destinée à désexciter une bobine (12) de l'entraînement et qui est automatiquement activée lorsque la bobine de la tension continue de démarrage ou de maintien générée par le bloc d'alimentation (10) est déconnectée.
  6. Dispositif de commande selon la revendication 5,
    caractérisé en ce que
    la désexcitation rapide (22) présente une diode et une diode Zener qui sont montées en série parallèlement à la bobine (12) de l'entraînement.
  7. Appareil de commutation, en particulier contacteur, avec
    - un entraînement de commutation présentant une bobine (12), et
    - un dispositif de commande (10, 16, 18, 22) selon l'une quelconque des revendications précédentes, destiné à commander l'alimentation électrique de la bobine (12).
  8. Appareil de commutation selon la revendication 7, caractérisé en ce que l'unité de commande (16) du dispositif de commande présente un microprocesseur ou un microcontrôleur configuré grâce à un programme stocké dans une mémoire, un signal de commande (14) destiné à commander la génération d'une tension continue de démarrage et d'une tension continue de maintien par le bloc d'alimentation (10) de telle manière que le bloc d'alimentation (10) génère une tension continue de démarrage pour l'entraînement (12) lorsque des conditions de démarrage sont remplies et une tension continue de maintien pour l'entraînement (12) lorsque des conditions de maintien sont remplies.
EP16781711.3A 2015-10-15 2016-10-06 Dispositif de commande pour un entraînement électromagnétique d'un appareil de commutation Active EP3363036B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL16781711T PL3363036T3 (pl) 2015-10-15 2016-10-06 Przyrząd sterujący do napędu elektromagnetycznego urządzenia łącznikowego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015117593.2A DE102015117593A1 (de) 2015-10-15 2015-10-15 Steuervorrichtung für einen elektromagnetischen Antrieb eines Schaltgeräts
PCT/EP2016/073826 WO2017063933A1 (fr) 2015-10-15 2016-10-06 Dispositif de commande pour un entraînement électromagnétique d'un appareil de commutation

Publications (2)

Publication Number Publication Date
EP3363036A1 EP3363036A1 (fr) 2018-08-22
EP3363036B1 true EP3363036B1 (fr) 2020-09-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP16781711.3A Active EP3363036B1 (fr) 2015-10-15 2016-10-06 Dispositif de commande pour un entraînement électromagnétique d'un appareil de commutation

Country Status (6)

Country Link
US (1) US10916397B2 (fr)
EP (1) EP3363036B1 (fr)
CN (1) CN108140510B (fr)
DE (1) DE102015117593A1 (fr)
PL (1) PL3363036T3 (fr)
WO (1) WO2017063933A1 (fr)

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DE202018105908U1 (de) 2018-10-16 2020-01-20 WAGO Verwaltungsgesellschaft mit beschränkter Haftung Schaltung zur Verringerung der Energieaufnahme beim Ansteuern eines Relais

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Also Published As

Publication number Publication date
US20180301305A1 (en) 2018-10-18
CN108140510B (zh) 2020-06-09
CN108140510A (zh) 2018-06-08
PL3363036T3 (pl) 2021-03-08
US10916397B2 (en) 2021-02-09
DE102015117593A1 (de) 2017-04-20
EP3363036A1 (fr) 2018-08-22
WO2017063933A1 (fr) 2017-04-20

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