EP0120258B1 - Circuit économiseur d'énergie - Google Patents

Circuit économiseur d'énergie Download PDF

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Publication number
EP0120258B1
EP0120258B1 EP84101475A EP84101475A EP0120258B1 EP 0120258 B1 EP0120258 B1 EP 0120258B1 EP 84101475 A EP84101475 A EP 84101475A EP 84101475 A EP84101475 A EP 84101475A EP 0120258 B1 EP0120258 B1 EP 0120258B1
Authority
EP
European Patent Office
Prior art keywords
capacitor
potential
delay circuit
comparator
voltage source
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
Application number
EP84101475A
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German (de)
English (en)
Other versions
EP0120258A1 (fr
Inventor
Walter Dipl.-Ing. Stieglbauer
Hans Ott
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
Priority to AT84101475T priority Critical patent/ATE41716T1/de
Publication of EP0120258A1 publication Critical patent/EP0120258A1/fr
Application granted granted Critical
Publication of EP0120258B1 publication Critical patent/EP0120258B1/fr
Expired legal-status Critical Current

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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

Definitions

  • the invention relates to an energy-saving circuit for electrical devices, which should get by with a certain, relatively high power requirement when switched on with a relatively low operating power, as is specified in the preamble of claim 1.
  • a DC voltage source operates on a first capacitor arranged in parallel with the electrical device, a first switching element lying in series with the device, which is connected to a delay circuit which has a timing element.
  • a second capacitor is the timing element of the delay circuit, which determines the charging of the first capacitor, by the capacitance of the second capacitor emitting a signal after a period of time sufficient for charging the first capacitor after the voltage source has been switched on, which switches the first switching element to conduct current.
  • Such a circuit according to the generic term is known (DE-A-2929261).
  • both the charging current to the first capacitor and the operating current for the relay are drawn at a limiting resistor which supplies the reduced operating current from a DC voltage source with a single voltage level. Losses therefore constantly occur at this limiting resistor.
  • the invention has for its object to develop an energy-saving circuit of the type described, which, after switching on a circuit, first satisfies a relatively high power requirement when switched on for a certain period of time and then delivers a relatively low operating power and in which the operating current or holding current is almost zero ohmic losses is provided.
  • the above-described object is achieved by an energy-saving circuit according to claim 1.
  • the secondary winding with the larger number of turns provides the greatest part of the charge for the first capacitor at a high charging voltage.
  • the secondary winding which has the lower number of turns, is connected via the rectifier directly to the parallel circuit comprising the electrical device and the first capacitor, so that it supplies the major part of the lower operating current for the electrical device. At a lower voltage level, this secondary winding therefore ensures a high charging current in the first charging region of the second capacitor and thus a steep charging curve during the first charging time.
  • the line failure between the DC voltage source and the first capacitor is connected to the power failure detector, which is also connected to an adjustable reference potential and, if, after a comparison, the potential at the line combination is less than the reference potential, reactivates the delay circuit by using the second capacitor for discharges the duration of a reduced potential at the line link, whereby the delay circuit can then be used again according to its function.
  • the delay circuit which can be constructed in particular according to claim 2, causes, in a manner known per se, that after the voltage source is switched on, all of the energy delivered flows to the first capacitor.
  • the delay circuit keeps the first switching element arranged in series with the electrical device de-energized for an appropriately selected period of time.
  • the first capacitor supplies the inrush current, after which the operation of the electrical device is essentially supplied with operating current by the second secondary winding with the lower number of turns.
  • the direct voltage at a higher voltage level which is obtained from the secondary winding with the higher number of turns, can hardly generate any power loss.
  • both the charging current for the first capacitor and the operating current for the relay are obtained from a voltage source for a voltage level via a limiting resistor , so that even during the operation of the electrical device considerable power loss is incurred.
  • a known circuit arrangement (DE-A-3 027 183), which supplies the inrush current from a first voltage source at a higher voltage level and provides the operating current or holding current from a second source at a lower voltage level, requires its own thyristor control for the switchover. For this and for the two voltage sources, which are supplied from a network, a relatively complex circuit is required.
  • the energy-saving circuit according to the invention on the other hand, with a simple circuit structure of the type described at the outset, the losses during operation are significantly reduced and the outlay with respect to the known source with two voltage levels is significantly reduced.
  • the mains failure detector After a mains voltage failure or after switching off the system, the mains failure detector quickly makes it operational again. After a brief switch-off of the device, a residual charge can remain on the capacitors, a residual charge on the second capacitor in the RC element of the delay circuit resulting in the delay circuit not being able to meet the requirements. Then the delay time determined by the charging time of the second capacitor would be shorter than required, so that the first capacitor could not be fully charged and the energy stored on it was not sufficient to switch on the electrical device This is prevented by the power failure detector. If a smaller potential than the reference potential at the second comparator is registered at the line connection between the source and the first capacitor, the output of the second comparator switches to reference potential.
  • a connecting line to the RC element of the delay circuit then pulls the charge off the second capacitor via a diode, so that it is completely discharged when the device is switched on again. As a result, the delay circuit is reactivated.
  • the power failure detector can be constructed in detail according to claim 3.
  • the efficiency of the energy-saving circuit can be improved if it is ensured that no operating current reaches the electrical device via the limiting resistor.
  • This can be achieved by a second switching element according to claim 4, which is arranged between the rectifier connected downstream of the secondary winding with the higher number of turns of the transformer and the ohmic resistance. The second switching element is controlled by the delay circuit.
  • the energy-saving circuit according to the invention is illustrated in the drawing.
  • An electrical device 1 which requires a high power requirement when switched on and a low operating power, is located in a rectified circuit which is fed by a low-power voltage source 4.
  • the first switching element 5 is connected via a tap between two ohmic resistors 25 and 26 to a delay circuit 6 and is controlled by the latter.
  • the delay circuit 6 contains a first comparator 9, the negative input 91 of which is connected via a voltage divider 18 to the voltage source 4 in order to generate a reference potential.
  • the positive input 92 is connected to the voltage source 4 via an RC element 10.
  • the RC element 10 is composed of an ohmic resistor 11 and a second capacitor 12, which determines the delay time with its charging time.
  • the output 93 of the first comparator 9 is at reference potential until, as a result of the charging of the second capacitor 12, the potential at the positive input 92 of the first comparator 9 exceeds the potential at the negative input 91. Then, with a delay compared to the switching on of the voltage source 4, a signal is emitted.
  • the signal is fed to the first switching element 5 via a connecting line, which then switches the supply line of the electrical device 1 to be live.
  • a power failure detector 7 is connected to a line link 19 between voltage source 4 and first capacitor 3.
  • Its output 83 is linked to the RC element 10 of the delay circuit 6 via a diode 17 which is permeable in the opposite direction.
  • Another link between the power failure detector 7 and the delay circuit 6 is a connection between the output 93 of the first comparator 9 and the positive input 82 of the second comparator 8 via a third capacitor 22 in series with an ohmic resistor 23.
  • the output 83 is at reference potential. As a result, the second capacitor 12 of the RC element 10 is discharged via the diode 17.
  • a drop in the potential at the positive input 82 of the second comparator 8 can take place due to a drop in the potential at the line connection 19, which takes place in the event of a mains voltage failure and also when the system is switched off.
  • comparators 8 and 9 The power supply for the comparators 8 and 9 is not shown for reasons of clarity. As is known, comparators continuously require an operating voltage in order to be able to work. It must not fall below a minimum operating voltage, since the comparators would otherwise have no function or their functions would be uncontrolled. A DC voltage must therefore be provided for comparators which does not drop below a minimum voltage. If the DC voltage source 15 is illustrated as a one-way rectification, a smoothing capacitor which is present in any case with regard to the supply line from the rectifier 15 to the power failure detector 7 can prevent the pulsating DC voltage from falling below the permissible value for the comparators.
  • a jump from high to reference potential at the output 93 of the first comparator 9 can also reach the positive input 82 of the second comparator 8 via the third capacitor 22 and the ohmic resistor 23 and briefly lower the potential there even further. This jump is triggered when, when the second capacitor 12 in the RC element 10 is discharged by the second comparator 8, the potential at the second capacitor 12, which is also at the positive input 92 of the first comparator 9, falls below the potential at the negative input 91.
  • the voltage source 4 has a transformer 24 with two secondary windings 13 and 14 having different numbers of turns. The number of turns is chosen so that the induced voltages by a factor of differ about 4 to 6. Separate rectifiers 15 and 16 are connected to both secondary windings 13 and 14. The secondary winding 13 with the larger number of turns is connected to the line connection 19 via an ohmic resistor 2 which serves to limit the current. The major part of the charging current for the first capacitor 3 flows via this connection.
  • the secondary winding 13 is connected to the RC element 10 of the delay circuit 6.
  • the negative input 91 of the first comparator 9 is also connected via the voltage divider 18 and the negative input 81 of the second comparator 8 via the voltage divider 20 to the secondary winding 13 for generating the reference potentials.
  • the secondary winding 14 with the smaller number of turns is connected to the line connection 19 via the rectifier 16. It supplies the greater part of the low operating current for the electrical device 1.
  • a further development of the invention further improves the efficiency by limiting losses, and for this purpose provides a second switching element 27 which is arranged between the rectifier 15 assigned to the secondary winding 13 with the higher number of turns and the ohmic resistor 2.
  • the second switching element 27 can in particular be a pnp transistor.
  • the base of the second switching element 27 is connected to the delay circuit 6 via an ohmic resistor 29 and a zener diode 28, so that a signal from the delay circuit 6 interrupts the emitter-collector current and thus the connection between the rectifier 15 and the ohmic resistor 2 .
  • the higher voltage required only for charging the first capacitor 3 is interrupted against the reference potential of the secondary winding 13 after charging has taken place.

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  • Power Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Dc-Dc Converters (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Saccharide Compounds (AREA)
  • Earth Drilling (AREA)
  • Inverter Devices (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Direct Current Feeding And Distribution (AREA)
  • Relay Circuits (AREA)
  • Control Of Electrical Variables (AREA)
  • Rectifiers (AREA)

Claims (4)

1. Montage économiseur d'énergie pour appareils électriques (1) qui absorbent une puissance déterminée, relativement élevée, à l'enclenchement et doivent pouvoir fonctionner ensuite avec une puissance de service relativement faible, l'appareil électrique (1) étant relié, à cet effet, à une source de tension continue (4) de faible puissance et étant monté en parallèle avec un premier condensateur (3) et en série avec un premier élément de commutation (5) qui est relié à un circuit de temporisation (6) présentant un deuxième condensateur (12) en tant qu'élément de retard et est commandé par ce circuit, du fait que, après un laps de temps pouvant être fixé par la capacité du deuxième condensateur (12) et qui suffit à la charge du premier condensateur (3) à partir de l'enclenchement de la source de tension, un signal délivré par le circuit de temporisation (6) fait passer le premier élément de commutation (5) à l'état conducteur, caractérisé en ce
- que la source de tension continue (4) comporte un transformateur (24) avec deux enroulements secondaires (13, 14) dont les nombres de spires diffèrent et qui forment à partir de la tension secteur appliquée, ensemble avec des redresseurs (15, 16) prévus à leur suite, deux tensions continues dont l'amplitude diffère d'un facteur d'environ 4 à 6,
-que l'enroulement secondaire (13) présentant le plus grand nombre de spires est relié, à travers le redresseur (15) prévu à sa suite et à travers une résistance ohmique (2) servant à la limitation du courant, au montage en parallèle de l'appareil électrique (1) et du premier condensateur (3), de manière qu'il fournisse la majeure partie de la charge pour le premier condensateur (3),
- que l'enroulement secondaire (14) présentant le plus faible nombre de spires est relié directement, à travers le redresseur (16), au montage parallèle de l'appareil électrique (1) et le premier condensateur (3), de manière qu'il fournisse la majeure partie du courant de service, plus faible, pour l'appareil électrique (1) et
- qu'un détecteur (7) de défaillance de la tension secteur est relié à un noeud de conducteurs (19) entre la source de tension continue (4) et le premier condensateur (3), détecteur qui est relié, en outre, à un potentiel repère réglable et qui, lorsque le potentiel au noeud (19) est inférieur au potentiel repère à la suite d'une comparaison, réactive le circuit de temporisation (6), du fait qu'il décharge le deuxième condensateur (12) pour la durée d'un potentiel réduit au noeud (19), de sorte que le circuit de temporisation (6) peut ensuite fonctionner de nouveau.
2. Montage selon la revendication 1, caractérisé en ce que le circuit de temporisation (6) comporte un premier comparateur (9) dont l'entrée négative (91) est reliée à la source de tension (4) à travers un diviseur de tension (18) en vue de la génération d'un potentiel de référence et dont l'entrée positive (92) est reliée à la source de tension (4) à travers un couplage RC (10), constitué d'une résistance ohmique (11) et d'un deuxième condensateur (12), lequel détermine la durée du retard par son temps de charge, la sortie (93) du premier comparateur (9) présentant le potentiel repère, à la suite de l'enclenchement de la source de tension (4), jusqu'à ce que, sous l'effet de la charge du deuxième condensateur (12), le potentiel à l'entrée positive (92) du premier comparateur (9) dépasse le potentiel à l'entrée négative (91) et que la sortie (93) puisse alors délivrer un signal retardé au premier élément de commutation (5).
3. Montage selon la revendication 2, caractérisé en ce
- que le détecteur (7) de défaillance de la tension secteur comporte un second comparateur (8) dont l'entrée négative (81) est reliée à la source de tension (4) à travers un diviseur de tension (20) en vue de la génération d'un potentiel de référence, dont l'entrée positive (82) est reliée au noeud de conducteurs (19) à travers une résistance ohmique (21) et dont la sortie (83) est reliée au couplage RC (10) du circuit de temporisation (6) à travers une diode (17) passante en sens inverse, l'abaissement de la tension secteur, provoquant l'abaissement du potentiel sur le noeud (19) et du potentiel sur l'entrée positive (82) du second comparateur (8) au-dessous du potentiel repère, faisant passer la sortie (83) du second comparateur (8) au potentiel repère pendant le temps que le potentiel à l'entrée positive (82) est inférieur au potentiel à l'entrée négative (81), avec le résultat que la charge du deuxième condensateur (12) du couplage RC (10) peut être évacuée à travers la diode (17) et
- que l'entrée positive (82) du second comparateur (8) est reliée, en outre, à la sortie (93) du premier comparateur (9), à travers un troisième condensateur (22) et une résistance ohmique (23), une brusque variation du potentiel «haut» au potentiel repère sur la sortie (93) du premier comparateur (9), à la suite d'une remontée de la tension secteur avant que le deuxième condensateur (12) dans le couplage RC (10) ne soit complètement déchargé, pouvant être transmise à travers le troisième condensateur (22) et la résistance ohmique (23) à l'entrée positive (82) du second comparateur (8) et maintenant le potentiel sur cette entrée à une valeur inférieure au potentiel de référence sur l'entrée négative (81), jusqu'à ce que le deuxième condensateur (12) soit complètement déchargé.
4. Montage selon la revendication 1, caractérisé en ce
- qu'un second élément de commutation (27) est disposé entre le redresseur (15) monté à la suite de l'enroulement secondaire (13) présentant le plus grand nombre de spires du transformateur (24) et la résistance ohmique (2) et
- que le second élément de commutation (27) est relié au circuit de temporisation (6), à travers une résistance ohmique (29) et une diode Zener (28), de manière qu'un signal de sortie du circuit de temporisation (6) coupe le courant émetteur- collecteur traversant le second élément de commutation (27).
EP84101475A 1983-02-25 1984-02-13 Circuit économiseur d'énergie Expired EP0120258B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84101475T ATE41716T1 (de) 1983-02-25 1984-02-13 Energiesparschaltung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833306761 DE3306761A1 (de) 1983-02-25 1983-02-25 Energiesparschaltung
DE3306761 1983-02-25

Publications (2)

Publication Number Publication Date
EP0120258A1 EP0120258A1 (fr) 1984-10-03
EP0120258B1 true EP0120258B1 (fr) 1989-03-22

Family

ID=6191891

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84101475A Expired EP0120258B1 (fr) 1983-02-25 1984-02-13 Circuit économiseur d'énergie

Country Status (5)

Country Link
EP (1) EP0120258B1 (fr)
JP (1) JPS59163731A (fr)
AT (1) ATE41716T1 (fr)
DE (2) DE3306761A1 (fr)
NO (1) NO161889C (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3434343A1 (de) * 1984-09-19 1986-03-27 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Anordnung zur stromversorgung von relais
GB2209640B (en) * 1987-09-08 1992-05-20 Crabtree Electrical Ind Ltd Improvements relating to relays
JPH01279533A (ja) * 1988-04-28 1989-11-09 Nec Corp リレー駆動回路
DE3840991A1 (de) * 1988-12-06 1990-06-07 Eberle Gmbh Ansteuerschaltung fuer elektromagnetische schaltgeraete
DE102018128328A1 (de) * 2018-11-13 2020-05-14 Phoenix Contact Gmbh & Co. Kg Steuerschaltung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1227218A (fr) * 1958-04-22 1960-08-19 Thomson Houston Comp Francaise Perfectionnements aux basculeurs à transistrons
GB1466246A (en) * 1974-07-02 1977-03-02 Redding Robert James Electrical switching circuits
DE2929261A1 (de) * 1979-07-17 1981-02-05 Licentia Gmbh Einrichtung zur betaetigung eines relais
DE3027183C2 (de) * 1980-07-18 1986-07-17 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Schaltungsanordnung

Also Published As

Publication number Publication date
NO161889B (no) 1989-06-26
EP0120258A1 (fr) 1984-10-03
JPS59163731A (ja) 1984-09-14
NO834550L (no) 1984-08-27
DE3477441D1 (en) 1989-04-27
ATE41716T1 (de) 1989-04-15
DE3306761A1 (de) 1984-08-30
NO161889C (no) 1989-10-04

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