EP1925010B1 - Circuit d'amorçage pour relais - Google Patents

Circuit d'amorçage pour relais Download PDF

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Publication number
EP1925010B1
EP1925010B1 EP06764171A EP06764171A EP1925010B1 EP 1925010 B1 EP1925010 B1 EP 1925010B1 EP 06764171 A EP06764171 A EP 06764171A EP 06764171 A EP06764171 A EP 06764171A EP 1925010 B1 EP1925010 B1 EP 1925010B1
Authority
EP
European Patent Office
Prior art keywords
relay
voltage source
diode
capacitor
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.)
Not-in-force
Application number
EP06764171A
Other languages
German (de)
English (en)
Other versions
EP1925010A1 (fr
Inventor
Gerald Hörist
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
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of EP1925010A1 publication Critical patent/EP1925010A1/fr
Application granted granted Critical
Publication of EP1925010B1 publication Critical patent/EP1925010B1/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
    • H01H47/02—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
    • H01H47/043—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 making use of an energy accumulator

Definitions

  • the invention relates to a drive circuit for a relay, wherein a coil of the relay and a switching element connected in series are supplied by a first voltage source formed by a capacitor and wherein the capacitor is connected via a charging circuit formed from a first diode to an AC voltage source.
  • Control circuits for relays whose coil is connected in series with only one switching element to a voltage source known from the prior art.
  • a relay is activated and deactivated by switching the switching element, for example a transistor, on and off.
  • a freewheeling circuit is provided with a diode in the rule.
  • the rectifier circuit For connecting a coil of a relay to an AC voltage network, a rectifier circuit is used in the prior art.
  • the rectifier circuit consists of a diode and a capacitor.
  • the diode is only permeable to the positive half-waves of the alternating voltage.
  • the capacitor charges up increasingly with each positive half-cycle, at least the exciter voltage of the relay having to be reached in order for the relay to attract when the switching element is switched on.
  • relays that serve the state of the art in inverters for connecting alternative power sources to a 230V AC network. These are, for example, photovoltaic systems or fuel cells, for their economic use, a high overall efficiency is required. High holding power of the relay have a negative effect on the overall efficiency.
  • the object of the invention is to provide a comparison with the prior art improved drive circuit for a relay.
  • this is done according to claim 1 in an inverter with a drive circuit of the type mentioned, wherein an additional DC voltage source is provided, which is connected via a second diode in parallel to the first voltage source.
  • an additional DC voltage source is provided, which is connected via a second diode in parallel to the first voltage source.
  • the charging circuit in series with the first diode comprises a resistor which limits the charging current of the capacitor. This will prevent the current from the charging circuit, the capacitor with the switching element continuously recharges and thus keeps at the high level of the AC voltage source.
  • a corresponding limitation of the charging current allows a discharge of the capacitor across the coil of the relay up to a voltage level corresponding to the voltage value of the additional DC voltage source minus the voltage drop across the second diode.
  • the current for the further holding of the relay is thus taken from the DC voltage source except for the small proportion of the charging current.
  • the voltage of the DC voltage source is less than the required excitation voltage of the relay and thus causes a lower holding power.
  • the DC source must supply enough current to prevent the relay from dropping.
  • An advantageous construction of the drive circuit provides that the coil is connected with a first terminal via the resistor, the first diode and the capacitor to a conductor of the AC voltage source and via the second diode to the DC voltage source and with a second terminal via the switching element with a Reference potential is connected and that the two terminals of the coil via a third diode for demagnetization are interconnected.
  • the coil demagnetizes after switching off the switching element via the third diode and is ready for the next cycle.
  • the switching element it is advantageous to arrange a Zener diode parallel to the capacitor. This has a lower breakdown voltage than the peak value of the pulsed rectified AC voltage. The voltage to be switched by the switching element is then limited to this breakdown voltage, so that a cost-effective Switching element can be used, since then not the full peak value of the pulsed rectified AC voltage must be switched from this.
  • the relay in the exemplary embodiment is used, for example, as a switch for connecting a power source to a 230V AC mains.
  • the power circuit is not shown for clarity.
  • the 230V AC network with a conductor (L1 network ) and a neutral as the reference potential (N network ) also forms the AC voltage source to which the drive circuit via a charging circuit consisting of a diode 5 and a resistor 7 (eg 400kOhm) is connected.
  • This charging circuit charges a capacitor 4 (eg 4.7 ⁇ F).
  • the capacitor 4 forms a first voltage source, to which the coil 1 of the relay is connected to a downstream switching element 2.
  • the switching element 2 is, for example, a transistor.
  • the base of the transistor is connected via a further resistor 3 to a control signal S.
  • This control signal S is, for example, a square wave voltage between 0V and plus 5V.
  • the switching element 2 is switched off when the control signal S has a value of 0V.
  • Zener diode 9 is arranged parallel to the capacitor 4, a Zener diode 9 is arranged.
  • the voltage applied to the switching element 2 voltage is limited to the breakdown voltage of the zener diode 9, whereby the switching element 2 can be dimensioned correspondingly small. It is also possible to connect several zener diodes in series to achieve a higher breakdown voltage (eg 4 x 62V).
  • the coil 1 of the relay is connected in parallel to the capacitor 4 via a second diode 8 to a further DC voltage source U.
  • the anode of the diode 8 is connected to the DC voltage source U.
  • the DC voltage source U supplies, for example, a constant voltage value of 15V.
  • relay circuits are used in devices that include additional circuitry for control, reporting or measuring tasks. Conveniently, then as a DC voltage source U is a positive potential at a point of these additional circuitry available; There is then no additional effort to provide the DC voltage source U.
  • the coil 1 is demagnetized after switching off of the switching element. 2
  • the capacitor 4 charges via the charging circuit.
  • the diode 5 of the charging circuit is permeable to the positive half-waves of the AC voltage source, the other two diodes 6 and 8 are blocked.
  • the capacitor 4 charges so long until the voltage across the capacitor 4 corresponds to the breakdown voltage of the zener diode 9 and this is permeable or if the switching element turns on before reaching the breakdown voltage. It is important to ensure that the voltage across the capacitor 4 reaches at least the excitation voltage of the relay so that this can be tightened.
  • the control signal S changes to plus 5V
  • the switching element 2 turns on and pulls the positive potential of the capacitor 4 via the coil 1 of the relay to the reference potential N network .
  • the current flow through the coil 1 empties the capacitor 4 until the positive potential applied to the capacitor 4 corresponds to the voltage of the DC voltage source U less the voltage drop at the second diode 8.
  • the second diode 8 is then permeable, arranged parallel to the coil 1 third diode 6 blocks further.
  • the capacitor 4 retains its voltage potential and the current through the coil 1 is taken from the DC voltage source U except for the portion of the charging current which continues to flow. The holding power is thus largely covered by the DC voltage source U.
  • this type of holding current supply for example, for relays of the Finder 62.22.8.230.4300 or Tyco Electronics RM900271, can achieve a reduction of the holding power from approx. 2.8VA to 0.1W.
  • the control signal S changes back to 0V and the switching element 2 switches off.
  • the relay drops out.
  • the demagnetization of the coil 1 flows in the forward direction of the third diode 6 through the coil 1 until the magnetization energy is reduced and thus the diode 6 blocks again.
  • the capacitor 4 is then charged again for the next turn on the charging circuit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Relay Circuits (AREA)
  • Selective Calling Equipment (AREA)

Claims (4)

  1. Onduleur, comprenant un relais de connexion de sources de courant alternatif, un réseau de tension alternative et un circuit d'amorçage du relais, dans lequel une bobine ( 1 ) du relais et un élément ( 2 ) de commutation, monté en série avec celle-ci, sont alimentés par une première source de tension formée par un condensateur ( 4 ) et dans lequel le condensateur ( 4 ) est relié au réseau de tension alternative par un circuit de charge formé d'une première diode ( 5 ), caractérisé en ce qu'il est prévu une source ( U ) supplémentaire de tension continue, qui est montée en parallèle à la première source de tension, par l'intermédiaire d'une deuxième diode ( 8 ).
  2. Onduleur suivant la revendication 1, caractérisé en ce que le circuit de charge comprend une résistance ( 7 ).
  3. Onduleur suivant la revendication 1 ou 2, caractérisé en ce que la bobine ( 1 ) est connectée par une première borne, par l'intermédiaire de la résistance ( 7 ), de la première diode ( 5 ) et du condensateur ( 4 ), à un conducteur ( L1Netz ) de la source de tension alternative et, par l'intermédiaire de la deuxième diode ( 8 ), à la source ( U ) de tension continue et est reliée à un potentiel ( L1Netz ) de référence par une deuxième borne, par l'intermédiaire de l'élément ( 2 ) de commutation et en ce que les deux bornes de la bobine sont reliées entre elles par une troisième diode ( 3 ), pour la démagnétisation.
  4. Onduleur suivant l'une des revendications 1 à 3, caractérisé en ce qu'une diode ( 9 ) Zener est montée en parallèle au condensateur ( 4 ).
EP06764171A 2005-09-14 2006-07-14 Circuit d'amorçage pour relais Not-in-force EP1925010B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005043884A DE102005043884B4 (de) 2005-09-14 2005-09-14 Ansteuerungsschaltung für ein Relais
PCT/EP2006/064252 WO2007031356A1 (fr) 2005-09-14 2006-07-14 Circuit d'amorçage pour relais

Publications (2)

Publication Number Publication Date
EP1925010A1 EP1925010A1 (fr) 2008-05-28
EP1925010B1 true EP1925010B1 (fr) 2010-11-17

Family

ID=37076322

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06764171A Not-in-force EP1925010B1 (fr) 2005-09-14 2006-07-14 Circuit d'amorçage pour relais

Country Status (4)

Country Link
EP (1) EP1925010B1 (fr)
AT (1) ATE488854T1 (fr)
DE (2) DE102005043884B4 (fr)
WO (1) WO2007031356A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE474363T1 (de) * 2008-06-18 2010-07-15 Sma Solar Technology Ag Schaltungsanordnung mit einem bistabilen relais zwischen einem netz und einem wechselrichter
CN112992605B (zh) * 2021-05-06 2021-08-06 深圳市永联科技股份有限公司 隔离单元及相关产品

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2109580A1 (de) * 1971-03-01 1972-09-14 Noller W Schnellerregung gleichstromgespeister Elektromagneten
AT359564B (de) * 1978-09-08 1980-11-25 Siemens Ag Oesterreich Ansprech- und halteschaltung fuer selbsthaltende relais
DE2929261A1 (de) * 1979-07-17 1981-02-05 Licentia Gmbh Einrichtung zur betaetigung eines relais
US4326133A (en) * 1979-09-06 1982-04-20 Rospatch Corporation Control circuit for alternately actuating a pair of loads
DE19604208C1 (de) * 1996-02-06 1997-07-10 Rowenta Werke Gmbh Schaltungsanordnung zur verlustarmen ohmschen Spannungsversorgung eines Relais
DE29812029U1 (de) * 1998-07-07 1998-11-05 Bucher, Siegfried, Dipl.-Ing.(FH), 78652 Deißlingen Elektromechanisches Relais

Also Published As

Publication number Publication date
ATE488854T1 (de) 2010-12-15
DE102005043884B4 (de) 2009-05-07
WO2007031356A1 (fr) 2007-03-22
EP1925010A1 (fr) 2008-05-28
DE102005043884A1 (de) 2007-03-22
DE502006008351D1 (de) 2010-12-30

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