EP0032089A2 - Speiseschaltung für eine elektrische Last, insbesondere für eine Entladungslampe - Google Patents

Speiseschaltung für eine elektrische Last, insbesondere für eine Entladungslampe Download PDF

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Publication number
EP0032089A2
EP0032089A2 EP80401830A EP80401830A EP0032089A2 EP 0032089 A2 EP0032089 A2 EP 0032089A2 EP 80401830 A EP80401830 A EP 80401830A EP 80401830 A EP80401830 A EP 80401830A EP 0032089 A2 EP0032089 A2 EP 0032089A2
Authority
EP
European Patent Office
Prior art keywords
circuit
line
control
negative
positive
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.)
Granted
Application number
EP80401830A
Other languages
English (en)
French (fr)
Other versions
EP0032089B1 (de
EP0032089A3 (en
Inventor
Jan Rividi
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.)
ELAM Ltd DITE Ste
Original Assignee
Elam Ltd Dite Ste
Elam Ltd
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 Elam Ltd Dite Ste, Elam Ltd filed Critical Elam Ltd Dite Ste
Priority to AT80401830T priority Critical patent/ATE10565T1/de
Publication of EP0032089A2 publication Critical patent/EP0032089A2/de
Publication of EP0032089A3 publication Critical patent/EP0032089A3/fr
Application granted granted Critical
Publication of EP0032089B1 publication Critical patent/EP0032089B1/de
Expired legal-status Critical Current

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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
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/39—Controlling the intensity of light continuously
    • H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S315/00—Electric lamp and discharge devices: systems
    • Y10S315/04—Dimming circuit for fluorescent 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S315/00—Electric lamp and discharge devices: systems
    • Y10S315/07—Starting and control circuits for gas discharge lamp using transistors

Definitions

  • the present invention relates to a device for supplying an electric charge, in particular a discharge lamp.
  • a non-limiting field of application of the invention is that of the control of discharge lamps of an outdoor public lighting installation.
  • circuits for supplying discharge lamps which include an electronic switch of the thyristor or triac type (that is to say constituted by a triode semiconductor circuit operating in alternating mode. ).
  • Such a device is provided with a control electrode on which is applied a voltage pulse of adjustable duration causing the conduction of the switch and thereby the lighting of the lamp.
  • a voltage pulse of adjustable duration causing the conduction of the switch and thereby the lighting of the lamp.
  • the switching is obtained by means of a pulse which causes the conduction of the switch which leads to an uncertainty on the triggering instant.
  • the object of the present invention is to provide a supply device making it possible to avoid these drawbacks, that is to say making it possible to carry out a precise control by overcoming the problems posed by the phase shift between the instants of transition to zero of the supply mains voltage and of the voltage across the load.
  • a device comprising a static switch of the thyristor or triac type provided with a control electrode and connected between a connection terminal to an AC supply sector and a connection terminal to an assembly receiver, and a control circuit delivering control pulses applied to the control electrode to control the state of the static switch
  • the control circuit comprises a circuit for detecting the zero crossing of the voltage at the terminals of the receiver assembly, a generator connected to the detection circuit to supply control pulses of adjustable duration at the zero crossings of the current and the voltage across the terminals of the load and a circuit applying the pulses: command on the control electrode to control the transition to the non-conduction state of the static switch in response to the control pulses.
  • the switching of the load is carried out at the moment when the voltage across its terminals passes through zero. This avoids electrical interference at the time of switching.
  • control pulse applied to the switch is a pulse which prohibits conduction and not which causes it. Consequently, in the event of an anomaly in the supply device, the prohibition command is generally not applied and the supply of the load is not interrupted. This brings an appreciable advantage from the point of view of safety when the load is for example a discharge lamp of a lighting installation.
  • control pulse generator comprises a monostable circuit which supplies pulses of adjustable duration and which is triggered by signals delivered by the zero crossing detection circuit.
  • the detection circuit comprises two symmetrical detection channels receiving respectively the negative half-waves and the positive half-waves of the voltage across the terminals of the receiver assembly and respectively delivering on two distinct outputs first and second distinct signals in response to the passages at zero positive and negative half-waves of current and voltage in the load.
  • the control pulse generator receives said first and second zero-crossing detection signals and delivers in response first and second pulses of the same adjustable duration.
  • the device represented in FIG. 1 comprises two terminals MT1 and MT3 for connection to an AC supply sector, two terminals MT2 and MT2 'for connection to a discharge lamp 22 provided with a ballast 24 and a switch TRC that one will suppose to be thereafter, a triac.
  • This switch is provided with a control electrode G and is inserted between the terminals MT1 and MT2.
  • the device also comprises a circuit 10 for controlling the conduction state of the switch, this circuit delivering a voltage pulse applied to the electrode G.
  • the control circuit further comprises a single monostable circuit M having an adjustable duration 9 defined by an adjustable resistor, a fixed part R14 of which is disposed in the member 10 and an adjustable part is included in an adjustment circuit 40, the structure of which will be described in conjunction with FIG. 2.
  • the monostable circuit M has two complementary inputs E and E 'connected respectively to the outputs K and K' of the channels 16 and 16 and two outputs L and L 'delivering two complementary rectangular pulses of duration e.
  • connection line 19 connects, by a resistor R23, the output 0 to the control electrode G of the switch TRC.
  • a circuit R24-C8 is inserted between the terminal MT2 and the line Ref and a resistor R25 between M T3 and the diodes dl and d2.
  • the detection channels 16 and 16 + for crossing the load voltage through zero each comprise: a first transistor Q1, Q4 having a base connected to MT2 by a resistor Ro, a collector connected to line P1 for the first channel and line N1 for the second, by a resistor R1, R4, a transmitter connected to the line Ref; a second transistor Q2, Q5 having a base connected to the collector of the first transistor, an emitter connected to the line Ref and a collector connected to the line P1 for the first channel and to the line N1 for the second, by a resistor R2, R5 ; a third transistor Q3, Q6 having a base connected to the collector of the second transistor by a resistor R3, R6, an emitter connected to line P1 for the first channel and to line N1 for the second and a collector connected to line N2 for the first channel and to line P1 for the second by a resistor R7, R9, the emitter-collector circuit of this third transistor being thus inserted between the positive line P1
  • circuits 18 and 18 ′ for forming the control pulse each comprise: a first transistor Q7, Q9 having a base connected to one of the outputs. L, L 'of the monostable M by a resistor R15, R19, an emitter connected to the line Ref, a collector connected by a resistor R17, R21 to the base of the second transistor and a second transistor Q8, Q10 having a base connected to l emitter by a resistor R18, R22, an emitter connected to the line Po for the first circuit and to the line No for the second and a collector connected to the common output O.
  • the resistance defining the duration of the pulses delivered by the monostable M can be adjusted by adjusting the value of a variable resistance provided in the circuit 40 in series between the resistance R14 and the line Pl.
  • This variable resistance can consist of a single adjustable resistance or in a series of resistors which can be selectively activated.
  • variable resistance is adjusted manually or automatically.
  • FIG. 2 shows in more detail an automatic variable resistance adjustment circuit for adjusting the duration of the pulses delivered by the monostable M and, consequently, the duration of closure of the triac TRC.
  • This circuit comprises an assembly 40 comprising resistors having at their terminals a transistor and a circuit 30 for controlling the opening or the closure of each trasistor.
  • a resistance-transistor group includes, for example, resistors R30, R31 and R32 and a transistor Q11, the emitter of which is connected to a connection line 41 joined to the positive line P1 of the circuit 10 in FIG. 1.
  • the control of the base of this transistor is effected by the input terminal X1 on which is applied an appropriate voltage delivered by the circuit 30 to make the transistor Q11 on or off.
  • the assembly 40 therefore comprises a plurality of inputs X1, X2 .... Xn controlled by the circuit 30.
  • the latter is made up, as well known to those skilled in the art, of a clock connected to circuits electronic, in particular counting circuits capable of generating signals to be applied to the inputs X1, X2, ... at the desired times.
  • CMOS technology components scales, doors etc ...) can be used.
  • connection P2 is connected, through a diode d7, to point 12 disposed between the diodes dl and d3 of the circuit 10 or to point 12 ';
  • connection N2 is connected through a diode d8 at point 14 arranged between diodes d2 and d4 of the same circuit or at point 14 '.
  • a capacitor C9 connects the connections P2 and N2. Finally, two control inputs CL1 and CL2 are provided for the external control of circuit 30.
  • control circuit of the invention is illustrated by the diagrams in FIG. 3, which in fact relate to the single circuit of control 10, the circuits 30 and 40 for adjusting the resistance presenting no difficulty in understanding.
  • Line (a) of this figure shows the alternating voltage sampled in MT3 and line (b) the voltage sampled in MT2, that is to say the voltage charged at the terminals of the lamp (these voltages are taken relative to the phase present in MT1 considered as reference). It will be observed, as indicated above, that the two illustrated voltages do not cancel each other out at the same time.
  • the control circuit refers to the instants of cancellation of the voltage in MT2 and not of that of the sector as in the prior art.
  • Lines (c) and (d) illustrate the variations in the collector voltages of transistors Q2 and Q3 belonging to circuit 16 - and give the states of these transistors.
  • Line (e) shows the positive pulse generated in K 'by the differentiating circuit C3-R8, the diode d5 blocking the negative pulse.
  • the transistor Q3 connects the line P1 to the line N1, the pulse in question is of amplitude P1 - N1. It is the front edge of this impulse that triggers the monostable.
  • the three lines (c), (d) and (e) illustrate the. operation of the circuit in the detection of zero crossing of the negative alternation of the voltage taken from MT2.
  • lines (f) and (g) illustrate the variations in the collector voltages of transistors Q5 and Q6 belonging to circuit 16 and give the states of these transistors.
  • Line (h) shows the negative pulse generated in K by the tap-off circuit C4 - RIO, diode d6 blocking the positive pulse. Again, as the transistor Q6 connects the line N1 to the line P 1, the amplitude of this negative pulse is equal to P1 -NI, as for the previous circuit.
  • the three lines (f), (g) and (h) illustrate the operation of the circuit in the detection of the zero crossing of the positive alternation of the load voltage taken from MT2.
  • Lines (i) and (j) illustrate the complementary pulses of duration e, delivered by the monostable on its two outputs L and L '.
  • Lines (k) and (1) show the state of the transistors Q8 and Q10, the hatched areas corresponding to periods during which these transistors are in the non-conducting state and constitute a high impedance between the lines Po, No and the exit O.
  • Lines (m) and (n) show the voltages to which lines Po and No are borne, voltages in the form of positive alternations for the first and negative for the second.
  • the last line (o) represents the voltage appearing on output 0 and which is finally applied to the control electrode G of the triac.
  • This voltage is formed by positive and negative arches corresponding to the voltages of the lines Po and No notched with slots of width ⁇ corresponding to the intervals where the transistors Q8 and Q10 are not conductive. Such a voltage is therefore very likely to prohibit the conduction of the triac for the entire duration e, as indicated above, the conduction being obtained outside these periods.
  • This triac command can be obtained in any of the four quadrants.
  • the variant described relates to a circuit which comprises two complete dual processing channels (channels 16 - and 16 and circuits 18 and 18 ') but it would not go beyond the scope of the invention to use only one processing channel (e.g. channel 16 and circuit 18 ', or channel 16 and circuit 18) to take into account only the alternations of a certain sign or else of the voltage under load, or else of the control voltage developed after one of the two outputs of the monostable .
  • one processing channel e.g. channel 16 and circuit 18 ', or channel 16 and circuit 18

Landscapes

  • Electronic Switches (AREA)
  • Control Of Electrical Variables (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
EP80401830A 1979-12-19 1980-12-19 Speiseschaltung für eine elektrische Last, insbesondere für eine Entladungslampe Expired EP0032089B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80401830T ATE10565T1 (de) 1979-12-19 1980-12-19 Speiseschaltung fuer eine elektrische last, insbesondere fuer eine entladungslampe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7931108A FR2476410A1 (fr) 1979-12-19 1979-12-19 Circuit d'alimentation notamment d'une lampe a decharge
FR7931108 1979-12-19

Publications (3)

Publication Number Publication Date
EP0032089A2 true EP0032089A2 (de) 1981-07-15
EP0032089A3 EP0032089A3 (en) 1981-07-22
EP0032089B1 EP0032089B1 (de) 1984-11-28

Family

ID=9232941

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80401830A Expired EP0032089B1 (de) 1979-12-19 1980-12-19 Speiseschaltung für eine elektrische Last, insbesondere für eine Entladungslampe

Country Status (8)

Country Link
US (1) US4388565A (de)
EP (1) EP0032089B1 (de)
JP (1) JPS5693299A (de)
AR (1) AR227902A1 (de)
AT (1) ATE10565T1 (de)
BR (1) BR8008301A (de)
DE (1) DE3069727D1 (de)
FR (1) FR2476410A1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4777409A (en) * 1984-03-23 1988-10-11 Tracy Stanley J Fluorescent lamp energizing circuit
NL8402351A (nl) * 1984-07-26 1986-02-17 Philips Nv Gelijkstroom-wisselstroomomzetter voor het voeden van een metaaldampontladingsbuis.
US4904906A (en) * 1986-08-21 1990-02-27 Honeywell Inc. Fluorescent light dimming
US5270620A (en) * 1990-09-04 1993-12-14 General Electric Company High frequency resonant converter for operating metal halide lamps
EP0566672A1 (de) * 1991-01-09 1993-10-27 Welch Allyn, Inc. Gerät für eine niederleistungshalogenmetalldampflampe

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2453253A1 (de) * 1974-10-23 1976-04-29 Bbc Brown Boveri & Cie Vorschaltgeraet zum vorheizen und zuenden von leuchtstoffroehren
US4096413A (en) * 1976-02-20 1978-06-20 General Electric Company Flicker eliminating intensity controller for discharge lamp dimming circuit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3793557A (en) * 1972-07-17 1974-02-19 Berkey Colortran Dimmer circuit and gapped core inductor useful therewith
EP0003528B1 (de) * 1978-02-11 1981-09-30 Elstrom Control System AG Elektronische Einrichtung zur Helligkeitsregulierung einer elektrischen Gasentladungslampe ohne Glühkathode

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2453253A1 (de) * 1974-10-23 1976-04-29 Bbc Brown Boveri & Cie Vorschaltgeraet zum vorheizen und zuenden von leuchtstoffroehren
US4096413A (en) * 1976-02-20 1978-06-20 General Electric Company Flicker eliminating intensity controller for discharge lamp dimming circuit

Also Published As

Publication number Publication date
EP0032089B1 (de) 1984-11-28
US4388565A (en) 1983-06-14
JPS5693299A (en) 1981-07-28
BR8008301A (pt) 1981-07-07
DE3069727D1 (en) 1985-01-10
EP0032089A3 (en) 1981-07-22
ATE10565T1 (de) 1984-12-15
FR2476410B1 (de) 1983-07-08
FR2476410A1 (fr) 1981-08-21
AR227902A1 (es) 1982-12-30

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