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WO1997038559A1 - Circuit de commande servant a commander une charge depuis une alimentation en courant continu - Google Patents

Circuit de commande servant a commander une charge depuis une alimentation en courant continu Download PDF

Info

Publication number
WO1997038559A1
WO1997038559A1 PCT/NL1997/000185 NL9700185W WO9738559A1 WO 1997038559 A1 WO1997038559 A1 WO 1997038559A1 NL 9700185 W NL9700185 W NL 9700185W WO 9738559 A1 WO9738559 A1 WO 9738559A1
Authority
WO
WIPO (PCT)
Prior art keywords
load
switch
circuit
drive circuit
input terminal
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.)
Ceased
Application number
PCT/NL1997/000185
Other languages
English (en)
Dutch (nl)
Inventor
Kurt Van Buul
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.)
NETHERLANDS CAR BV
Original Assignee
NETHERLANDS CAR BV
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 NETHERLANDS CAR BV filed Critical NETHERLANDS CAR BV
Priority to AU23098/97A priority Critical patent/AU2309897A/en
Publication of WO1997038559A1 publication Critical patent/WO1997038559A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
    • H05B39/04—Controlling
    • H05B39/041—Controlling the light-intensity of the source
    • H05B39/044—Controlling the light-intensity of the source continuously
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
    • H05B39/04—Controlling
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/16—Controlling the light source by timing means
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

Definitions

  • the invention relates to a drive circuit for driving a load connected to a power supply by means of said drive circuit, whereby both said power supply and said load comprise a first and a second terminal and whereby the first terminals of said power supply and said load are interconnected,
  • drive circuit comprises an electronic first switch comprising a power input terminal, which is connected to the second terminal of said power supply, a control input terminal and a drive output terminal connected to the second terminal of said load, whereby a second switch is connected in a series circuit with said load, and which furthermore comprises a processing circuit provided with an input terminal and with an output terminal connected to the control input terminal of said first switch for generating a control signal on its output terminal in dependence on said second switch being operated, which is detected by said processing circuit on its input terminal.
  • a drive circuit of this type may be considered to be known from US Patent No. 5,030,890.
  • the known drive circuit is connected to the electricity grid, and the load may be a heating, lighting or motor load.
  • the first switch is a triac, and said triac is controlled by means of phase shift control.
  • the second switch is an on/off switch, which is present at some distance from the load, a gas-discharge lamp, for example.
  • the processing circuit senses the voltage across the triac and delivers a triggering signal for the triac on the basis thereof. More in particular, the processing circuit detects a power interruption caused by said second switch being operated. In response to a temporary interruption of the alternating current being applied a change in the power intensity or in the delivery of power to the load is effected for a predetermined length of time.
  • the second switch is closed and a power interruption is effected by quickly opening and closing the second switch.
  • Various ways of driving the load may be selected by opening and closing the second switch briefly a number of times in succession. More in particular the power interruption is used to achieve full intensity lighting or more or less dimmed lighting by means of the gas-discharge lamp.
  • the object of the invention is to provide a drive circuit for driving direct-current loads, in particular for use in cars, whereby a single conductor may be used both for driving the load and for signalling to the processing circuit the manner in which the load is to be driven.
  • the invention provides a drive circuit of the kind referred to in the introduction, which is characterized in that said power supply is a direct-current power supply, that said second switch is an automatically resetting normally- closed switch, which is connected between the drive output terminal of said first switch and the second terminal of the load, and that said first switch is provided with a current sensing input terminal connected to the drive output terminal thereof and with a detection output terminal connected to the input terminal of said processing circuit for generating a detection signal which indicates, both in the case of a driven load and in the case of a non-driven load, whether or not current is flowing through the series circuit of said second switch and said load.
  • the first switch is an electronic semiconductor device, such as a MOSFET, or a combination of devices of this kind.
  • the second switch may be an interrupter push-button, whereby the term interrupter push-button used herein is understood to mean a switch which makes a (conducting) connection between the two switch terminals during the idle state.
  • the (conducting) connection is (automatically) restored again (by means of a spring, for example) when the interrupter push-button is released.
  • the electronic switch will detect a circuit interruption and not a power interruption, as is the case with the aforesaid US patent. This interruption is recognized as a switching action by the processing circuit of the drive circuit, as a result of which the load can be switched on or off, depending on the previous state.
  • Said second switch may also be or comprise a touch-sensitive switch.
  • the drive circuit may effect a different switching action, dependent on the duration of the interruption. For example, in the case of a short interruption of, let us say, less than 1 second, the load may be switched on briefly, and in the case of a long interruption the load may be switched on for a longer period of time, or vice versa.
  • the processing circuit of the drive circuit may furthermore be set such that in the case of a brief interruption the load is switched off slowly and that another brief interruption will cause the load to switch on slowly, whilst the load is switched on or off directly in the case of a long interruption.
  • the advantage of the drive circuit according to the invention is that only one electric conductor (between the first switch and the second switch) is required both for driving and for detecting, which results in savings of cost as well as weight, which is of great importance, for example in the case of cars. In addition this leads to an enhanced reliability. Furthermore the load is fully driven by the electronics of the drive circuit according to the invention. Finally an automatic diagnosis of a load forming an open circuit is obtained. The fact is that when the interruption lasts longer than 25 seconds, for example, it may be concluded that the load forms an open circuit.
  • the power supply may be a car battery.
  • the load may be a car accessory, whereby the term car accessory is to be given a broad interpretation and may be of the lamp, heater, resistor, coil and motor type.
  • car accessory is to be given a broad interpretation and may be of the lamp, heater, resistor, coil and motor type.
  • operation of the interrupter push-button might cause the processing device to reverse the direction of rotation of the motor.
  • Another aspect of the present invention is the fact that when several series circuits of first switch, second switch and load are used, there is a possibility of the processing circuit driving the load in another series circuit based on the operation of a second switch in a series circuit.
  • Figure 1 is a combined block and circuit diagram illustrating a possible embodiment of the invention.
  • Figure 2 shows a simplified extension possibility of the embodiment of Figure 1.
  • Figure 1 shows an embodiment of a drive circuit for driving a load 2, in this case a lamp, for example, which is connected to a direct-current power supply 1 by means of said drive circuit, whereby power supply 1 and load 2 each have a first terminal
  • the drive circuit shown in Figure 1 comprises an electronic first switch 3 having a power input terminal 31 connected to the second terminal 12 of power supply 1, a control input terminal 32, a drive output terminal 33, a current sensing input terminal 34 connected to said drive output terminal 33, and a detection output terminal 35. Furthermore a second switch 4 is provided in the shape of an automatically resetting normally-closed switch connected between the drive output terminal 33 of first switch 3 and the second terminal 22 of load 2.
  • a processing circuit 5 which comprises an input terminal 51 connected to the detection output terminal 35 of first switch 3 for generating a detection signal which indicates, both in the case of a driven load 2 and in the case of a non-driven load 2, whether or not current is flowing through the series circuit of second switch 4 and load 2, and which also comprises an output terminal 52 connected to the control input terminal 32 of first switch 3 for generating a control signal in dependence on the detection on input terminal 51 of operation of second switch 4.
  • Opening switch 4 by hand causes an interruption of the circuit between the two supply terminals 11 and 12. This results in a voltage change on detection output terminal 35 (status check or current output) of electronic switch 3.
  • the electronic switch 3 is for example provided with a status output terminal, in the case of a so-called smart power MOSFET, or with a current-sensing output terminal, in the case of a so-called current-sensing MOSFET. Also other types of transistors or suitable electronic components may be used for that matter.
  • the MOSFET may for example be selected from the Siemens ProFET (registered trademark) or TempFET (registered trademark) series, such as type BTS412.
  • the voltage change is detected as a switching action by the drive circuit, that is, a change from a disconnected load 2 to a connected load 2, or vice versa. Furthermore it is possible for the drive circuit to effect a different switching action, depending on the duration of the interruption. For example, in the case of a brief interruption of less than 1 second, for example, load 2 may be switched on briefly, and in the case of a longer interruption said load may be switched on for a long time, or vice versa.
  • the drive circuit may also be set such that a brief interruption causes load 2 to be switched off slowly and another brief interruption causes said load to be switched on slowly, whilst a longer interruption causes load 2 to be switched on or off directly.
  • the drive circuit according to the invention to have the processing circuit to " overrule” a manual switching " request " . Furthermore it is possible to detect by means of said voltage or current change that the load 2 in question forms an open circuit, which is concluded from the fact that the interruption lasts longer than a predetermined period of time of for example 25 seconds. This makes it possible to detect the open circuit condition both when load 2 is on and when load 2 should be on. This may be indicated on the signal output terminal 53 of the processing circuit, whereby a signal on signal output terminal 53 may be used for visible or audible signalling.
  • the processing circuit 5 may also be arranged in such a manner that: The load is switched on or off, depending on the previous condition, when second switch 4 is operated;
  • an open circuit condition indicates that the lamp is defective.
  • the lamp, being load 2, and second switch 4 may be jointly housed in a lamp holder.
  • FIG 2 shows an extension of Figure 1, whereby power supply 1 has been left out of Figure 1 for the sake of convenience.
  • Figure 2 shows two sub-circuits A and B, but a larger plurality of sub-circuits may be selected at will.
  • Each sub-circuit A and B may be selected at will.
  • a B comprises a series circuit of an electronic first switch 3, a second switch 4 and a load 2.
  • the control input terminal 32 and the detection output terminal 35 of first switch 3 of each sub-circuit A, B are the input terminal and the output terminal respectively of sub-circuit A, B.
  • Processing circuit 5 is provided with a number of input terminals 51 and output terminals 52 connected to the output terminals 35 and the input terminals 32 respectively of a respective sub-circuit A, B.
  • the processing circuit 5 is arranged in such a manner that processing circuit 5 will generate a control signal on its output terminal 52 connected to another sub-circuit A or B in dependence on the detection on input terminal 51 of processing circuit 5 of the operation of the second switch 4 of the sub-circuit B or A connected to said input terminal .
  • load 2 of sub-circuit A may be driven by second switch 4 of sub-circuit B, and load 2 of sub-circuit B may be driven by second switch 4 of sub-circuit A. It will be apparent that various minor modifications to a drive circuit according to the invention are possible without departing from the essence of the invention.
  • the essential aspect of the drive circuit according to the invention is the fact that processing circuit 5 can determine at all times whether the load 2 in question may/must be switched on or off.

Landscapes

  • Electronic Switches (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

Circuit de commande conçu pour des charges de courant continu et comprenant plusieurs circuits en série constitués chacun par un commutateur électronique, un commutateur à remise à zéro automatique normalement fermé et une charge. Chaque commutateur électronique est capable de commander la charge dans les circuits en série respectifs. A cet effet, les commutateurs électroniques sont commandés par un circuit de traitement en fonction de signaux émis par lesdits commutateurs électroniques et qui signalent l'ouverture du commutateur normalement fermé pour le circuit de traitement. La commande et la signalisation ont lieu indépendamment l'une de l'autre, de sorte que l'ouverture du commutateur normalement fermé dans un circuit en série peut déclencher une charge dans un autre circuit en série à commander. De plus, le circuit de traitement peut détecter et signaler un état d'ouverture de circuit pour les charges. On peut utiliser ce circuit de commande particulièrement dans des véhicules automobiles.
PCT/NL1997/000185 1996-04-11 1997-04-11 Circuit de commande servant a commander une charge depuis une alimentation en courant continu Ceased WO1997038559A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU23098/97A AU2309897A (en) 1996-04-11 1997-04-11 A circuit for driving a load from a dc current power supply

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1002842 1996-04-11
NL1002842A NL1002842C2 (nl) 1996-04-11 1996-04-11 Lampaanstuurschakeling.

Publications (1)

Publication Number Publication Date
WO1997038559A1 true WO1997038559A1 (fr) 1997-10-16

Family

ID=19762661

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1997/000185 Ceased WO1997038559A1 (fr) 1996-04-11 1997-04-11 Circuit de commande servant a commander une charge depuis une alimentation en courant continu

Country Status (3)

Country Link
AU (1) AU2309897A (fr)
NL (1) NL1002842C2 (fr)
WO (1) WO1997038559A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2792159A1 (fr) * 1999-04-09 2000-10-13 Renault Dispositif et procede de commande de l'eclairage d'un vehicule equipe d'un reseau de distribution a tension augmentee

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2428909A1 (fr) * 1978-06-15 1980-01-11 Siemens Ag Minuterie d'eclairage pour escaliers
EP0381890A1 (fr) * 1989-02-08 1990-08-16 Westinghouse Brake And Signal Holdings Limited Moniteur de courant
US5001398A (en) * 1989-07-03 1991-03-19 Motorola, Inc. Lamp intensity control system having over-current protection
FR2656105A1 (fr) * 1989-12-19 1991-06-21 Sagem Dispositif de controle de fonctionnement de charges electriques d'un vehicule.
US5030890A (en) * 1988-05-25 1991-07-09 Johnson Samuel A Two terminal incandescent lamp controller

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0093408A1 (fr) * 1982-04-29 1983-11-09 Bronson Potter Dispositif à réglage de luminosité
DE4037948A1 (de) * 1990-11-29 1992-06-04 Holzer Walter Verfahren und einrichtung zur steuerung von gasentladungslampen mit elektronischen vorschaltgeraeten
DE4435557A1 (de) * 1994-10-05 1996-04-11 Guenter R J Kullik Netzbetriebenes Steuergerät

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2428909A1 (fr) * 1978-06-15 1980-01-11 Siemens Ag Minuterie d'eclairage pour escaliers
US5030890A (en) * 1988-05-25 1991-07-09 Johnson Samuel A Two terminal incandescent lamp controller
EP0381890A1 (fr) * 1989-02-08 1990-08-16 Westinghouse Brake And Signal Holdings Limited Moniteur de courant
US5001398A (en) * 1989-07-03 1991-03-19 Motorola, Inc. Lamp intensity control system having over-current protection
FR2656105A1 (fr) * 1989-12-19 1991-06-21 Sagem Dispositif de controle de fonctionnement de charges electriques d'un vehicule.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2792159A1 (fr) * 1999-04-09 2000-10-13 Renault Dispositif et procede de commande de l'eclairage d'un vehicule equipe d'un reseau de distribution a tension augmentee

Also Published As

Publication number Publication date
AU2309897A (en) 1997-10-29
NL1002842C2 (nl) 1997-10-15

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