EP0032089B1 - Speiseschaltung für eine elektrische Last, insbesondere für eine Entladungslampe - Google Patents
Speiseschaltung für eine elektrische Last, insbesondere für eine Entladungslampe Download PDFInfo
- Publication number
- EP0032089B1 EP0032089B1 EP80401830A EP80401830A EP0032089B1 EP 0032089 B1 EP0032089 B1 EP 0032089B1 EP 80401830 A EP80401830 A EP 80401830A EP 80401830 A EP80401830 A EP 80401830A EP 0032089 B1 EP0032089 B1 EP 0032089B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- circuit
- line
- pulse
- voltage
- zero
- 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
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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.
- the usual conditions of use of discharge lamps make it necessary to use means allowing the adjustment of the emitted light intensity, in particular in order to achieve energy savings.
- circuits for supplying discharge lamps which include an electronic switch of the thyristor or triac type (that is to say constituted by a triode type semiconductor circuit operating alternative).
- a control electrode to 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.
- the switching of the load is carried out when the voltage across the terminals of the load goes through zero. This avoids electrical noise at the time of switching.
- control pulse applied to the switch is a pulse which prohibits conduction and not which drives 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 control of the duration of non-conduction (and thereby conduction) is very easily achievable.
- 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 of the positive and negative alternations of the current and the 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 it is inserted between the terminals MT1 and MT2.
- the device also includes 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 6 defined by an adjustable resistor of which a fixed part R14 is disposed in the member 10 and an adjustable part is included in an adjustment circuit 40 whose structure 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 0.
- connection line 19 connects, by a resistor R23, the output O 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 MT3 and the diodes d1 and d2 ..
- the detection channels 16- and 16 + for zero crossing of the load voltage 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 to line N1 for the second, by a resistor R1, R4, an emitter 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
- 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 Ref line, 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 the emitter by a resistor R18, R22, an emitter connected to line Po for the first circuit and to line No for the second and a collector connected to common output 0.
- the resistor defining the duration of the pulses delivered by the monostable M can be adjusted by adjusting the value of a variable resistor provided in the circuit 40 in series between the resistor R14 and the line P1.
- This variable resistor can consist of a single adjustable resistor or a series of resistors that can be selectively put into service.
- 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 closing of each transistor.
- 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 connected 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 insertion of a resistor, for example R11, in series with R14 between the line P1 and the monostable M, is controlled by applying to the input X1 a signal capable of making the transistor Q11 conducting, signal generated by the circuit 30.
- the latter is constituted as well known by those skilled in the art, of a clock connected to electronic circuits 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 diodes d1 and d3 of circuit 10 or to point 12 '; the connection N2 is connected through a diode d8 at point 14 disposed between diodes d2 and d4 of the same circuit or at point 14 '.
- a capacitor C9 connects the connections P2 and N2.
- two control inputs CL1 and CL2 are provided for the external control of circuit 30.
- control circuit the invention is illustrated by the diagrams in FIG. 3, which in fact relate to the single control circuit 10, the circuits 30 and 40 for adjusting the resistance presenting no difficulty of 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 detecting the zero crossing of the negative half-wave 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 derivative circuit C4-R10, the diode d6 blocking the positive pulse. Again, as the transistor Q6 connects the line N1 to the line P1, the amplitude of this negative pulse is equal to P1-N1, as for the previous circuit.
- the three lines (f), (g) and (h) illustrate the operation of the circuit in detecting the zero crossing of the positive alternation of the load voltage taken from MT2.
- Lines (i) and (j) illustrate the complementary pulses of duration 0, delivered by the monostable on its two outputs L and L '.
- Lines (k) and (I) 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 the output O 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 0 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 6, as indicated above, the conduction being obtained outside these periods.
- This triac control 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 by using only one channel of processing (for example 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.
Landscapes
- Electronic Switches (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
- Control Of Electrical Variables (AREA)
Claims (11)
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 |
---|---|---|---|
FR7931108 | 1979-12-19 | ||
FR7931108A FR2476410A1 (fr) | 1979-12-19 | 1979-12-19 | Circuit d'alimentation notamment d'une lampe a decharge |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0032089A2 EP0032089A2 (de) | 1981-07-15 |
EP0032089A3 EP0032089A3 (en) | 1981-07-22 |
EP0032089B1 true 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)
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 |
JPH06503203A (ja) * | 1991-01-09 | 1994-04-07 | ウエルチ.アリン.インコーポレイテッド | 低ワット金属ハロゲン化物ランプ装置 |
Citations (1)
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 |
Family Cites Families (3)
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 |
US4096413A (en) * | 1976-02-20 | 1978-06-20 | General Electric Company | Flicker eliminating intensity controller for discharge lamp dimming circuit |
DE2961104D1 (en) * | 1978-02-11 | 1981-12-10 | Elstrom Control System Ag | Electronic device for controlling the light intensity of a gaseous discharge lamp without a heated cathode |
-
1979
- 1979-12-19 FR FR7931108A patent/FR2476410A1/fr active Granted
-
1980
- 1980-12-17 JP JP17733580A patent/JPS5693299A/ja active Pending
- 1980-12-18 US US06/217,868 patent/US4388565A/en not_active Expired - Fee Related
- 1980-12-18 AR AR283707A patent/AR227902A1/es active
- 1980-12-18 BR BR8008301A patent/BR8008301A/pt unknown
- 1980-12-19 AT AT80401830T patent/ATE10565T1/de not_active IP Right Cessation
- 1980-12-19 DE DE8080401830T patent/DE3069727D1/de not_active Expired
- 1980-12-19 EP EP80401830A patent/EP0032089B1/de not_active Expired
Patent Citations (1)
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 |
Also Published As
Publication number | Publication date |
---|---|
BR8008301A (pt) | 1981-07-07 |
ATE10565T1 (de) | 1984-12-15 |
FR2476410B1 (de) | 1983-07-08 |
EP0032089A3 (en) | 1981-07-22 |
US4388565A (en) | 1983-06-14 |
EP0032089A2 (de) | 1981-07-15 |
JPS5693299A (en) | 1981-07-28 |
FR2476410A1 (fr) | 1981-08-21 |
DE3069727D1 (en) | 1985-01-10 |
AR227902A1 (es) | 1982-12-30 |
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