EP0671747B1 - Circuit à courant continu réduit - Google Patents

Circuit à courant continu réduit Download PDF

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Publication number
EP0671747B1
EP0671747B1 EP95103350A EP95103350A EP0671747B1 EP 0671747 B1 EP0671747 B1 EP 0671747B1 EP 95103350 A EP95103350 A EP 95103350A EP 95103350 A EP95103350 A EP 95103350A EP 0671747 B1 EP0671747 B1 EP 0671747B1
Authority
EP
European Patent Office
Prior art keywords
winding
circuit
direct current
windings
way
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.)
Expired - Lifetime
Application number
EP95103350A
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German (de)
English (en)
Other versions
EP0671747A2 (fr
EP0671747A3 (fr
Inventor
Kurt Held
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 EP0671747A2 publication Critical patent/EP0671747A2/fr
Publication of EP0671747A3 publication Critical patent/EP0671747A3/fr
Application granted granted Critical
Publication of EP0671747B1 publication Critical patent/EP0671747B1/fr
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
    • H01F7/18—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
    • H01F7/1833—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current by changing number of parallel-connected turns or windings
    • 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 direct current saving circuit for a magnet system of an electromechanical drive with a coil with a plurality of windings, connected to one another via capacitors and connected to the positive and negative poles for the direct voltage connection, that after application of a direct voltage until the charging is completed Capacitors flow through the windings in parallel to each other, charging currents that contribute to the build-up of the magnetic field of the coil, and then a portion of the previously flowing direct current flows through the windings according to a series connection.
  • a generic direct current saving circuit for a magnet system of an electromechanical drive with a coil with several windings of the above-mentioned type is known from the document DE-AS 1 170 073.
  • windings of relays with capacitors are connected to a DC voltage source.
  • charging currents first flow through the windings by charging the capacitors in parallel.
  • the windings are flowed through by the current in a series circuit, although the current flow through the windings always takes place in the same direction, which causes a relatively high total excitation of the magnet system.
  • the dropout voltage is accordingly low.
  • a similar DC sparing circuit in which the windings are connected to a capacitor is known from GB-A-2 170 669.
  • a known direct-current economy circuit works with a pull-in winding and a holding winding on a coil former (see Siemens brochure, order no. E20001-P285-A342).
  • An NC contact is in series with the pull-in winding.
  • a holding winding is parallel to this. Both are connected to DC voltage via an ON button.
  • the ON button When a DC voltage is switched on by pressing the ON button, the result is a high current surge through the pull-in winding, which accelerates the armature of the magnet system towards the ON position.
  • the current flow in the pull-in winding is interrupted and the holding power required for the holding forces is applied by the holding winding.
  • this direct current saving circuit there are some disadvantages associated with this direct current saving circuit.
  • the holding winding In order to keep the coil temperature within limits, the holding winding must have a correspondingly high resistance, which is achieved by winding very thin winding wire with many turns.
  • the processing of the thin winding wire is very critical. Due to the high number of turns required, the winding time is quite long.
  • Another disadvantage of this direct-current economy circuit is that, during the switch-on process, the switch-on winding induces a high voltage in the holding winding, which can lead to arcing if the insulation is insufficient or a protective circuit against overvoltage is required.
  • the known direct-current economy circuit using a series resistor which is in parallel with an NC contact connected in series with a coil winding is also included Disadvantages connected.
  • the invention has for its object to provide a DC power saving circuit of the above type, which largely avoids the disadvantages mentioned without an NC and NO current path. This is achieved in that the current direction in one of the windings is reversed from the original and the magnetic field is thereby further reduced.
  • the drop voltage increases.
  • the coil has a first, a second and a third winding and if the winding ends of the first and second windings are electrically connected to one another and are connected to the DC voltage connection via a first capacitor at the negative pole when the winding starts first and second windings are connected to one another via a second capacitor and when the winding start of the third winding is at that of the second winding and the winding end of the third winding is at the negative pole.
  • the direct-current economy circuit has three partial coils with associated windings 2, 3, 4.
  • Your winding starts are with A1, A2, A3 and their winding ends E1, E2 and E3.
  • the winding end el of the first winding 2 is electrically connected to the winding end E2 of the second winding 3.
  • the winding end E2 of the second winding 3 is connected via a first capacitor 5 to the negative pole to the DC voltage connection, and the winding start A2 of the second winding 3 is connected to the via a second capacitor 6 Start of winding A1 of first winding 2 is electrically connected. From this electrical connection point, the DC voltage present at the positive pole 7 can be switched on via an ON button 9.
  • the third winding 4 is parallel to the series connection of the second winding 3 with the first capacitor 5. As indicated in FIG. 2, the windings 2, 3, 4 are applied to a coil former and the associated winding starts A1, A2, A3 and the winding ends E1, E2 and E3 are brought out for the interconnection according to FIG. 1.
  • the direct current economy circuit is acted upon by the direct voltage and the capacitors 5, 6 discharged in the initial state are replaced by the charging currents i 1 through the first winding 2, i 2 through the second winding 3 and i 3 charged by the third winding 4.
  • the capacitors 5, 6 behaves like high-resistance resistors and the initially parallel current flow through the windings 2, 3, 4 changes into a common current i g through all three windings 2, 3, 4, the current direction changing reverses in the second winding 3 with respect to the current direction when switching on.
  • 5 shows the current i 1 through the first winding 2
  • FIG. 6 shows the current i 2 through the second winding 3
  • FIG. 7 shows the current i 3 through the third winding 4.
  • the total current i g at the input is also the direct current -Saving circuit shown.
  • FIG. 6 shows the reversal of the current direction already mentioned after the capacitors 5, 6 have been charged. This significantly reduces the holding excitation, which leads to a higher drop voltage of the magnet system and also causes the drop current to be far above the residual current of an electronics stage.
  • No DC magnet system can do without an anti-retraction plate, but this can be made much thinner due to the reduction in excitation.
  • the anti-retraction plate can be reduced to a tenth of the usual value, although the dropout voltage is still much higher than usual.
  • the thin anti-retardant plate also brings a significant gain in traction.
  • FIG. 3 shows the direct current economy circuit according to FIG. 1 with an upstream threshold value stage, which essentially consists of a thyristor 11 controlled via a zener diode 10.
  • the effect of this is that the thyristor 11 only switches on at a response threshold predetermined by the zener diode 10 and the direct current saving circuit is acted upon by direct voltage.
  • the threshold level fulfills the requirement that a contactor must switch on quickly even when the mains voltage rises slowly.

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

Claims (4)

  1. Circuit économique à courant continu pour un système magnétique d'un dispositif d'entraînement électromécanique, comportant une bobine (1) à plusieurs enroulements (2,3,4), qui sont câblés entre eux par l'intermédiaire de condensateurs (5,6) et qui sont reliés au pôle plus (7) et au pôle moins (8) pour leur raccordement à la tension continue, de telle sorte qu'après l'application d'une tension continue et jusqu'à la fin de la charge des condensateurs (5,6) il passe par les enroulements (2,3,4) des courants de charge parallèles entre eux (i1,i2,i3) qui contribuent à l'établissement du champ magnétique de la bobine (1) et qu'ensuite les enroulements (2,3,4) soient parcourus suivant un circuit en série par une partie du courant continu (ig) passant précédemment,
    caractérisé en ce que le sens du courant s'inverse par rapport au sens d'origine dans l'un des enroulements (2,3 ou 4) et qu'ainsi le champ magnétique est davantage réduit.
  2. Circuit économique à courant continu suivant la revendication 1,
    caractérisé en ce qu'il est prévu un premier (2), un deuxième (3) et un troisième (4) enroulement sur la bobine (1), les fins (E1,E2) des premier (2) et deuxième (3) enroulements sont reliées électriquement entre elles et sont reliées par l'intermédiaire d'un premier (5) des condensateurs au pôle (8) moins pour le raccordement à la tension continue, les commencements (A1,A2) des premier (2) et deuxième (3) enroulements sont reliés entre eux par l'intermédiaire d'un deuxième (6) des condensateurs et le commencement (A3) du troisième enroulement (4) est relié à celui (A2) du deuxième enroulement (3) et la fin (E3) du troisième enroulement (4) est reliée au pôle moins (8).
  3. Circuit économique à courant continu suivant la revendication 1 ou 2,
    comportant un étage (10,11) à seuil,
    caractérisé en ce que l'étage (10,11) à seuil est branché à l'entrée respectivement à la sortie du circuit économique à courant continu, les tensions continues n'étant transmises au circuit économique à courant continu proprement dit par l'étage (10,11) à seuil qu'au dessus d'un seuil déterminé.
  4. Circuit économique à courant continu suivant la revendication 3,
    caractérisé en ce que l'étage à seuil comporte un thyristor (11) qui est commandé par l'intermédiaire d'une tension partielle proportionnelle à une tension continue connectée à l'extérieur et s'appliquant à une diode Zener (10).
EP95103350A 1994-03-11 1995-03-08 Circuit à courant continu réduit Expired - Lifetime EP0671747B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4408296 1994-03-11
DE4408296 1994-03-11

Publications (3)

Publication Number Publication Date
EP0671747A2 EP0671747A2 (fr) 1995-09-13
EP0671747A3 EP0671747A3 (fr) 1995-11-29
EP0671747B1 true EP0671747B1 (fr) 1997-09-17

Family

ID=6512546

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95103350A Expired - Lifetime EP0671747B1 (fr) 1994-03-11 1995-03-08 Circuit à courant continu réduit

Country Status (2)

Country Link
EP (1) EP0671747B1 (fr)
DE (1) DE59500653D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1014694C2 (nl) * 2000-03-20 2001-09-21 Actuant Corp Werkwijze en inrichting voor het sturen van een aantal magneetkleppen van een hydraulisch systeem. Werkwijze voor het sturen van spoelen van een elektromagnetische stuurinrichting en een zodanige inrichting geschikt voor toepassing van de werkwijze.
WO2013044446A1 (fr) * 2011-09-27 2013-04-04 Siemens Aktiengesellschaft Contacteur

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1170073B (de) * 1961-09-13 1964-05-14 Ibm Deutschland Schaltanordnung zur Anzugszeitverkuerzung bei Relais

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3361939A (en) * 1965-03-22 1968-01-02 Whittaker Corp Electrical actuator
GB2170669A (en) * 1985-02-05 1986-08-06 Era Patents Ltd Solenoid energisation circuit
JP2609654B2 (ja) * 1988-01-19 1997-05-14 群馬日本電気株式会社 フレキシブルデイスク装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1170073B (de) * 1961-09-13 1964-05-14 Ibm Deutschland Schaltanordnung zur Anzugszeitverkuerzung bei Relais

Also Published As

Publication number Publication date
EP0671747A2 (fr) 1995-09-13
DE59500653D1 (de) 1997-10-23
EP0671747A3 (fr) 1995-11-29

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