EP0669075A1 - Circuit arrangement for operating low-pressure discharge lamps. - Google Patents
Circuit arrangement for operating low-pressure discharge lamps.Info
- Publication number
- EP0669075A1 EP0669075A1 EP93924515A EP93924515A EP0669075A1 EP 0669075 A1 EP0669075 A1 EP 0669075A1 EP 93924515 A EP93924515 A EP 93924515A EP 93924515 A EP93924515 A EP 93924515A EP 0669075 A1 EP0669075 A1 EP 0669075A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- capacitor
- parallel
- diode
- lamp
- series
- 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
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 82
- 230000008878 coupling Effects 0.000 claims abstract 3
- 238000010168 coupling process Methods 0.000 claims abstract 3
- 238000005859 coupling reaction Methods 0.000 claims abstract 3
- 230000001629 suppression Effects 0.000 claims description 18
- 230000002457 bidirectional effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
- 238000005086 pumping Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
-
- 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
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
- H05B41/2825—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a bridge converter in the final stage
-
- 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 invention relates to a circuit arrangement for high-frequency operation of one or more low-pressure discharge lamps connected in parallel or in series with one another in accordance with the preamble of patent claim 1.
- the invention is therefore based on the object of specifying a circuit arrangement of the type mentioned at the outset which, using technically simple means without increased interference radiation and with low additional power losses, ensures an increase in the power factor of the circuit arrangement and reliable operation without a protective circuit.
- the modulation of the lamp current and also the generation of the harmonics is further reduced by arranging a capacitor in parallel with the second diode of the diode series circuit.
- a further radio interference suppression is achieved by a further capacitor, which is connected in parallel to the first diode.
- the capacitance of the series resonant circuit assigned to each low-pressure discharge lamp is preferably formed by two capacitors connected in parallel, the following inequality being favorable for the ratio of the capacitances of the two capacitors CRI and CR2 (connected to the filter capacitor):
- circuit arrangement is specified in claim 6, the components of which can have the specification listed in claim 7.
- the other of the two capacitors can be replaced with appropriately modified preheating capacitors if the coils are suitable.
- the solution according to the invention is a pump circuit in which the positive pole of the rectified AC mains voltage is connected to the base of the lamp via a first fast diode, which is polarized in the forward direction, after a radio interference filter for radio interference. This point is connected to the positive pole of the filter capacitor via a second diode that is polarized in the forward direction.
- a further improvement is achieved in that a capacitor is connected in parallel with the first diode.
- the current through this first diode is very rich in harmonics and causes strong radio interference, particularly in the range above 1 MHz.
- the capacitor with a capacitance of approximately 1 - 5 nF causes a sharp reduction in the harmonics of the operating frequency (50 kHz) and thus a drastic reduction in radio interference.
- FIG. 1 shows a block diagram of the circuit arrangement according to a first embodiment
- FIG. 2 shows a circuit diagram of the circuit arrangement according to FIG. 1;
- FIG. 3 shows a block diagram of a further embodiment of the circuit arrangement for operating a plurality of low-pressure discharge lamps connected in parallel with a common pump branch;
- FIG. 4 shows a block diagram of a further embodiment of the circuit arrangement for operating a plurality of low-pressure discharge lamps connected in parallel with separate pump branches;
- FIG. 5 shows a block diagram of a further embodiment of the circuit arrangement for operating a plurality of low-pressure discharge lamps connected in series with a common pump branch.
- a high-frequency filter or radio interference suppression filter 12 or vice versa is connected to the outputs of a mains rectifier 10, to which an RF inverter 14 with two alternating switching transistors T1 and T2 and a control circuit with one Center tap M (Fig. 2) follow between the two transistors T1 and T2.
- a low-pressure discharge lamp 18 is connected between the center tap M of the two transistors or switching transistors T1 and T2 and the positive pole of the radio interference suppression filter 12 via a series resonance circuit, which is designated by 16 in FIG. 2.
- One between the Both inputs of the RF inverter 14 switched filter capacitor Cs is connected with its minus pole to the minus pole of the radio interference suppression filter 12.
- Its positive pole is connected to the positive pole of the radio interference suppression filter 12 via a diode series circuit comprising D1 and D2 connected in series in the direct current direction and in series.
- An inductance LK is arranged between the first diode D j and the positive pole of the radio interference suppression filter 12. It serves to charge the filter capacitor Cs when the mains voltage falls below half the Cs voltage, while the first diode D1 and the second diode D2 serve to charge the filter capacitor Cs in one half period of the HF inverter 14 and in the other Half-period electricity is consumed from the grid.
- a capacitor CK connected in parallel with the diode D2 facilitates the swinging through of the HF inverter 14 and improves the ignitability of the circuit.
- An additional capacitor CF connected in parallel with the first diode D1 is used for radio interference suppression. While a first electrode E1 of the low-pressure discharge lamp 18 is connected to the center tap M of the HF inverter 14 via the inductance L3 and a capacitance C3, the second electrode E2 of the low-pressure discharge lamp 18 is connected to a tap or base point Wl l, which lies between the first diode Dl and the second diode D2 is arranged. An ignition circuit 20 is connected to the respective other outputs of the electrodes E1 and E2.
- the lamp-parallel resonance capacitance consists of two capacitors CRI and CR2, the first capacitor CRI connecting the two electrodes El and E2 of the low-pressure discharge lamp 18 via the base point Wl 1 and the second capacitor CR2 parallel to the first capacitor CRI, but after the two th diode D2 is arranged.
- the radio interference suppression filter 12 is connected to the positive or negative pole of the mains rectifier 10, which filter consists of two capacitors C ⁇ i and C ⁇ 2 with a respective capacitance of 150 nF and an inductance connecting the two capacitors C ⁇ i and C ⁇ 2 L ⁇ of 680 ⁇ H exists.
- the negative pole of the filter capacitor Cs is connected via the radio interference suppression filter 12 to the negative pole of the mains rectifier 10, while the positive pole of the filter capacitor CS is connected via the second diode D2 and the capacitor connected in parallel CK is connected to the second electrode E2 of the low-pressure discharge lamp 18 and to the radio interference suppression filter 12 via a fourth diode D4.
- the second diode D2 connects the filter capacitor Cs via the first diode Dl and the choke LK with an inductance of 470 ⁇ H via the radio interference suppression filter 12 to the positive pole of the mains rectifier 10.
- the capacitor CF connected in parallel with the first diode Dl has a capacitance of approximately 1 - 5 nF on.
- the HF inverter 14 is connected on the one hand between the second diode D2 and the positive pole of the filter capacitor Cs and, on the other hand, is connected to the negative pole of the mains rectifier 10 via the radio interference filter 12.
- the center tap M of the push-pull frequency generator 14 is connected to the first electrode E1 of the low-pressure discharge lamp 18 via an inductor L3 and a capacitor C3.
- the ignition circuit 20 connected to the two other connections of the electrodes E1 and E2 has two capacitors C4 and C5 connected in parallel with the electrodes E1 and E2, a temperature-dependent resistor R4 being provided in parallel with the one capacitor C4.
- the series connection from the capacities C4 and C5 contributes to the total resonance capacity from CRI and CR2.
- FIGS. 3 to 5 show circuit arrangements with which two and more low-pressure discharge lamps 18, 18n can be operated.
- FIG. 3 shows a circuit arrangement for the operation of two or more low-pressure discharge lamps 18 and 18n connected in parallel, all of which are operated with a common pump branch.
- a common pump branch For this is pressure discharge lamp for each additional Nieder ⁇ 18n, a separate ignition circuit 20n, an additional capacitor CRln or C ⁇ - ⁇ 2> of the first capacitor CRI or CR2 is connected in parallel and provided a separate lamp ballast L3n and one own decoupling capacitor C 3n.
- FIG. 4 shows a circuit arrangement for two and more low-pressure discharge lamps 18n connected in parallel with separate pump branches.
- the difference to the embodiment according to FIG. 3 is that the further capacitor CRln is connected to a further pump branch.
- the further pump branch is connected in parallel with the first pump branch and consists of the further inductance LKn > a further diode series connection D n and Ü2 n and the respectively connected further capacitors CKn and CFn-
- FIG. 5 An example of two and more low-pressure discharge lamps 18, 18n connected in series is shown in FIG. 5. All low-pressure discharge lamps 18 and 18n connected in series have a uniform ignition circuit 20.
- the difference to the embodiment according to FIG. 1 is that the first electrode E1 of the first low-pressure discharge lamp 18 is connected in series with the second electrode E2n of the further low-pressure discharge lamp 18n and with a galvanically separated preheating which consists of an additional winding L3n ' the lamp choke L3 is connected.
- the following components list shows the circuit elements used for a circuit arrangement for operating a 20 W compact fluorescent lamp on 120 V AC voltage:
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4238409 | 1992-11-13 | ||
DE4238409A DE4238409A1 (en) | 1992-11-13 | 1992-11-13 | Circuit arrangement for operating low-pressure discharge lamps |
PCT/DE1993/001079 WO1994012007A1 (en) | 1992-11-13 | 1993-11-11 | Circuit arrangement for operating low-pressure discharge lamps |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0669075A1 true EP0669075A1 (en) | 1995-08-30 |
EP0669075B1 EP0669075B1 (en) | 1997-03-05 |
Family
ID=6472847
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93924515A Expired - Lifetime EP0669075B1 (en) | 1992-11-13 | 1993-11-11 | Circuit arrangement for operating low-pressure discharge lamps |
Country Status (7)
Country | Link |
---|---|
US (1) | US5610479A (en) |
EP (1) | EP0669075B1 (en) |
JP (1) | JP2911222B2 (en) |
KR (1) | KR0181989B1 (en) |
CA (1) | CA2149327C (en) |
DE (2) | DE4238409A1 (en) |
WO (1) | WO1994012007A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4418886A1 (en) * | 1994-05-30 | 1995-12-07 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Cycled power supply for lamps from AC mains or DC source e.g. car battery |
AU2228097A (en) * | 1996-03-06 | 1997-09-22 | Tecninter Ireland Limited | An electronic ballast for a compact fluorescent lamp |
GB9801659D0 (en) * | 1998-01-28 | 1998-03-25 | Sloan Albert E | Individually switched fluorescent lamp circuits supplied from a master ballast or inverter |
DE19815623A1 (en) * | 1998-04-07 | 1999-10-14 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Circuit arrangement for operating low-pressure discharge lamps |
DE10046443A1 (en) * | 2000-09-18 | 2002-03-28 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Electronic circuit for the detection of the change in gas discharge lamps |
US6396219B1 (en) * | 2000-10-05 | 2002-05-28 | Ti-Ming Tang | Flasher string |
DE10102615B4 (en) | 2001-01-20 | 2006-06-29 | Deutsche Rockwool Mineralwoll Gmbh & Co. Ohg | Process for the production of insulating materials from mineral fibers and melt for the production of mineral fibers |
DE102005025154A1 (en) * | 2005-06-01 | 2006-12-07 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Circuit arrangement for operating a discharge lamp with temperature compensation |
US7477141B2 (en) * | 2006-11-15 | 2009-01-13 | Douglas Roberts | Modulated vehicle safety light system |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3112577A1 (en) * | 1981-03-30 | 1982-10-14 | Patra Patent Treuhand | Ballast arrangement for operating low-pressure discharge lamps |
AU555174B2 (en) * | 1981-09-18 | 1986-09-18 | Oy Helvar | Electronic ballast for a discharge lamp |
DE3202445A1 (en) * | 1982-01-26 | 1983-08-04 | Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen | Circuit arrangement for supplying a fluorescent tube |
DE3246454A1 (en) * | 1982-12-15 | 1984-06-20 | Siemens AG, 1000 Berlin und 8000 München | INVERTER WITH A LOAD CIRCUIT CONTAINING A SERIES RESONANCE CIRCUIT AND A DISCHARGE LAMP |
DE3611611A1 (en) * | 1986-04-07 | 1987-10-08 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | CIRCUIT ARRANGEMENT FOR HIGH-FREQUENCY OPERATION OF A LOW-PRESSURE DISCHARGE LAMP |
JPH02192695A (en) * | 1988-11-30 | 1990-07-30 | Toshiba Lighting & Technol Corp | Discharge lamp lighting device |
ES2049772T3 (en) * | 1989-05-02 | 1994-05-01 | Siemens Ag | ELECTRONIC ADAPTER. |
GB2261332B (en) * | 1991-11-06 | 1996-05-08 | Horizon Fabrications Ltd | Driving circuit for electrical discharge devices |
-
1992
- 1992-11-13 DE DE4238409A patent/DE4238409A1/en not_active Withdrawn
-
1993
- 1993-11-11 WO PCT/DE1993/001079 patent/WO1994012007A1/en active IP Right Grant
- 1993-11-11 CA CA002149327A patent/CA2149327C/en not_active Expired - Fee Related
- 1993-11-11 DE DE59305663T patent/DE59305663D1/en not_active Expired - Fee Related
- 1993-11-11 EP EP93924515A patent/EP0669075B1/en not_active Expired - Lifetime
- 1993-11-11 JP JP6511591A patent/JP2911222B2/en not_active Expired - Fee Related
- 1993-11-11 KR KR1019950701969A patent/KR0181989B1/en not_active IP Right Cessation
- 1993-11-11 US US08/381,978 patent/US5610479A/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9412007A1 * |
Also Published As
Publication number | Publication date |
---|---|
KR950704928A (en) | 1995-11-20 |
WO1994012007A1 (en) | 1994-05-26 |
DE4238409A1 (en) | 1994-05-19 |
DE59305663D1 (en) | 1997-04-10 |
US5610479A (en) | 1997-03-11 |
KR0181989B1 (en) | 1999-05-15 |
EP0669075B1 (en) | 1997-03-05 |
JP2911222B2 (en) | 1999-06-23 |
CA2149327A1 (en) | 1994-05-26 |
CA2149327C (en) | 2000-02-08 |
JPH07509098A (en) | 1995-10-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE69117008T2 (en) | Inverter arrangement | |
EP1638374B1 (en) | Circuit arrangement for operating at least a light source with improved crest factor | |
DE69413105T2 (en) | Power factor improvement circuit | |
EP0372303B1 (en) | Circuit arrangement for operating a low-pressure discharge lamp | |
EP0062276B1 (en) | Ballast circuit for the operation of low-pressure discharge lamps | |
DE3889012T2 (en) | High voltage DC power supply. | |
DE3711814C2 (en) | Electronic ballast for operating fluorescent lamps | |
WO1994012007A1 (en) | Circuit arrangement for operating low-pressure discharge lamps | |
EP0917412A2 (en) | Self-oscillating circuit with simplified startup circuit | |
DE19914505A1 (en) | Circuit for correcting power factor for gas discharge lamp balast power supply has at least one further diode between storage capacitor and rectifier that discharging of storage capacitor by rectifier is prevented | |
DE19517950A1 (en) | Power supply facility | |
DE19830368A1 (en) | Electronic ballast with inrush current limitation | |
CH660826A5 (en) | LUMINAIRE DEVICE WITH A GAS DISCHARGE LAMP AND A METHOD FOR THE OPERATION THEREOF. | |
DE3400580C3 (en) | AC-powered DC power source with downstream inverter | |
EP1028606B1 (en) | Circuit for operating at least one low-pressure discharge lamp | |
EP0697803A2 (en) | Circuit for operating discharge lamps | |
EP1761112A2 (en) | Voltage level shifter for a sepic-converter | |
DE102005028672A1 (en) | Smoothing circuit to improve the EMC | |
DE69227428T2 (en) | Supply circuit for discharge lamps | |
DE69714163T2 (en) | CIRCUIT | |
EP1540803B1 (en) | Electrical circuit for voltage transformation and use of said electrical circuit | |
DE10210805B4 (en) | Ballast for a discharge lamp | |
EP0952759B1 (en) | Electronic transformer | |
EP1553811A2 (en) | Circuit arrangement for operating light sources with power factor correction | |
EP0941636A1 (en) | Pump support choke |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19950207 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB IT |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
17Q | First examination report despatched |
Effective date: 19960304 |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB IT |
|
REF | Corresponds to: |
Ref document number: 59305663 Country of ref document: DE Date of ref document: 19970410 |
|
ET | Fr: translation filed | ||
ITF | It: translation for a ep patent filed | ||
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19970509 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19990120 Year of fee payment: 6 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19991116 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19991126 Year of fee payment: 7 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20001101 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20001111 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20001111 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010731 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20051111 |