EP0762807B1 - Circuit for operating glow discharge lamps - Google Patents
Circuit for operating glow discharge lamps Download PDFInfo
- Publication number
- EP0762807B1 EP0762807B1 EP96113262A EP96113262A EP0762807B1 EP 0762807 B1 EP0762807 B1 EP 0762807B1 EP 96113262 A EP96113262 A EP 96113262A EP 96113262 A EP96113262 A EP 96113262A EP 0762807 B1 EP0762807 B1 EP 0762807B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- circuit arrangement
- winding
- limb
- arrangement according
- circuit
- 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 - Lifetime
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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
- H05B41/16—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
- H05B41/20—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 having no starting switch
- H05B41/23—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 having no starting switch for lamps not having an auxiliary starting electrode
- H05B41/232—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 having no starting switch for lamps not having an auxiliary starting electrode for low-pressure lamps
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/08—High-leakage transformers or inductances
- H01F38/10—Ballasts, e.g. for discharge lamps
Definitions
- the invention relates to a circuit arrangement with a transformer for operating glow fluorescent lamps on a mains voltage in accordance with the preamble of claim 1.
- a circuit arrangement is e.g. known from US-A-3 360 753.
- Glow fluorescent lamps need a power source that everyone can start with Ignition phase provides a high ignition voltage that immediately after ignition the glow fluorescent lamp collapses to the burning voltage and from then on the desired combustion current should be as linear as possible at this voltage delivers until the current phase is over.
- the currentless period until the next ignition should be as short as possible because the ignition voltage for the next burning phase the higher the rapidly decaying must be Rebuild ionization. So this fact made up to now the operation of glow fluorescent lamps with conventional 50 Hz transformers impossible.
- the object of the invention is therefore to provide a circuit arrangement with a Transformer for operating glow fluorescent lamps on a mains voltage to create that has a high efficiency and inexpensive is to be produced.
- the glow fluorescent lamps are supposed to be safe to be ignited and flicker-free to operate.
- the magnetic reflux magnetizes then the second leg in the opposite direction and thus causes the ignition voltage to be reached in the next phase an earlier time.
- the shorter time interval until the rise of the secondary voltage in the following phase also causes the Ionization in the ignition path of the lamp has subsided less, and thus a lower ignition voltage is required for re-ignition.
- FIG 1 is a circuit arrangement according to the invention for operating a Glow fluorescent lamp GLL type T4 with a power consumption of 5 W on a mains AC voltage of 230 V.
- the transformer TR has three windings, a primary winding Wa, a first Winding part Wb1 of the secondary winding and a second winding part Wb2 of the secondary winding.
- the primary winding Wa and the first Part of the secondary winding Wb1 are on a first leg I of the magnetic core (see Figure 2) attached and electrically connected.
- the second winding part Wb2 of the secondary winding is on the second Leg II of the magnetic core attached. It is also in the primary circuit a PTC thermistor connected, which serves as a fuse element.
- Figure 2 shows the structure of the E and I core sheets on a scale of 2: 1 for one Transformer TR, as in the circuit arrangement shown in Figure 1 is used.
- the core sheets consist of iron sheets of type St 12 and have a thickness of 0.63 mm. For the magnetic core of the above 16 such sheets are required for the transformer.
- the windings consist of a lacquered copper wire and have the following dimensions: Primary winding Wa Secondary winding Wb1 Secondary winding Wb2 Number of turns 7,600 8 630 22 880 Wire thickness 0.05 mm 0.04 mm 0.04 mm
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
- Coils Of Transformers For General Uses (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
Description
Die Erfindung betrifft eine Schaltungsanordnung mit einem Transformator
zum Betreiben von Glimm-Leuchtstofflampen an einer Netzspannung gemäß
dem Oberbegriff des Anspruchs 1. Eine solche Schaltungsanordnung
ist z.B. aus US-A-3 360 753 bekannt.The invention relates to a circuit arrangement with a transformer
for operating glow fluorescent lamps on a mains voltage in accordance with
the preamble of
Bisher wurden für den Betrieb von Glimm-Leuchtstofflampen Streufeldtransformatoren bzw. lose gekoppelte Transformatoren, bei denen der Innenwiderstand durch Herabsetzung des Wirkungsgrades erhöht wurde, verwendet. Außerdem kamen andere Behelfsvorrichtungen, wie der Einsatz weiterer Bauteile sowie Zündhilfselektroden zur Anwendung.So far, stray field transformers have been used for the operation of glow fluorescent lamps or loosely coupled transformers where the Internal resistance was increased by reducing the efficiency, used. There were also other makeshift devices, such as the insert other components and auxiliary ignition electrodes for use.
Glimm-Leuchtstofflampen benötigen eine Stromquelle, die zu Beginn jeder Zündphase eine hohe Zündspannung bereitstellt, die sofort nach Zündung der Glimm-Leuchtstofflampe auf die Brennspannung zusammenbricht und von da an möglichst linear bei dieser Spannung den gewünschten Brennstrom liefert, bis die Stromphase zu Ende ist. Die stromlose Zeitspanne bis zur nächsten Zündung soll so kurz wie möglich sein, da die Zündspannung für die nächste Brennphase um so höher sein muß, je mehr die rasch abklingende Ionisation neu aufzubauen ist. Dieser Umstand machte daher bisher den Betrieb von Glimm-Leuchtstofflampen mit herkömmlichen 50 Hz-Transformatoren unmöglich.Glow fluorescent lamps need a power source that everyone can start with Ignition phase provides a high ignition voltage that immediately after ignition the glow fluorescent lamp collapses to the burning voltage and from then on the desired combustion current should be as linear as possible at this voltage delivers until the current phase is over. The currentless period until the next ignition should be as short as possible because the ignition voltage for the next burning phase the higher the rapidly decaying must be Rebuild ionization. So this fact made up to now the operation of glow fluorescent lamps with conventional 50 Hz transformers impossible.
Aufgabe der Erfindung ist es daher, eine Schaltungsanordnung mit einem Transformator zum Betrieb von Glimm-Leuchtstofflampen an einer Netzspannung zu schaffen, die einen hohen Wirkungsgrad besitzt und kostengünstig herzustellen ist. Die Glimm-Leuchtstofflampen sollen damit sicher zu zünden und flackerfrei zu betreiben sein.The object of the invention is therefore to provide a circuit arrangement with a Transformer for operating glow fluorescent lamps on a mains voltage to create that has a high efficiency and inexpensive is to be produced. The glow fluorescent lamps are supposed to be safe to be ignited and flicker-free to operate.
Die Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1
gelöst. Weitere Merkmale der Schaltungsanordnung sind den Unteransprüchen
zu entnehmen. The object is achieved by the characterizing features of
Durch den Aufbau des Transformatorkerns aus drei Schenkeln, wobei zumindest ein Schenkel keine Wicklung trägt, wird es möglich, ausreichend hohe Zündspannungen von ca. 1000 V zu erzielen, die sofort nach erfolgter Zündung auf Brennspannungen von ca. 200 V zusammenbrechen.By building the transformer core from three legs, at least one leg does not have a winding, it becomes possible to suffice to achieve high ignition voltages of approx. 1000 V which occur immediately after Break down ignition at burning voltages of approx. 200 V.
Nach dem Anlegen der Netzspannung an die Schaltungsanordnung läuft im Transformator folgender Vorgang ab: mit steigender Primärspannung wird in dem aus dem ersten und zweiten Schenkel und den beiden Jochen gebildeten Kreis des Magnetkerns ein entsprechendes Kraftfeld aufgebaut. In der Sekundärwicklung entsteht eine induzierte Spannung, die bei Erreichen der für die Glimm-Leuchtstofflampe notwendigen Zündspannung die Lampe zündet. Die Sekundärspannung sinkt anschließend auf die Brennspannung ab. Die noch immer ansteigende Primärspannung magnetisiert nun den bzw. die bis dahin nahezu nicht magnetisierten dritten Schenkel ohne Wicklung und schließt den Kraftlinienkreis über den ersten Schenkel, wobei der zweite Schenkel übergangen wird. Beim nachfolgenden Abbau der Felddichte aufgrund der sinkenden Primärspannung fließt der im dritten Schenkel bzw. in den dritten Schenkeln gespeicherte Magnetismus über die Joche wieder zurück, bevorzugt auf dem kürzeren Weg über den zweiten Schenkel und gibt einen Teil seiner Energie an die Sekundärwicklung bzw. an die Lampe ab. Dies wäre ohne den dritten Schenkel nicht möglich, da zu diesem Zeitpunkt aufgrund der abklingenden Netz-Sinusspannung über die Sekundärwicklung keine Energie mehr an die Lampe abgegeben werden könnte. Es stellt sich somit an der Lampe eine längere Brenndauer ein, als es sich aus der Sinushalbwelle ergeben würde.After applying the mains voltage to the circuit arrangement runs in Transformer the following process: with increasing primary voltage in that formed from the first and second legs and the two yokes A corresponding force field is built up in the circle of the magnetic core. In the Secondary winding creates an induced voltage, which is reached when the the lamp required for the glow fluorescent lamp ignites. The secondary voltage then drops to the operating voltage from. The still rising primary voltage now magnetizes the or the third leg, which had not been magnetized until then, without winding and closes the line of force over the first leg, the second Thigh is passed over. When subsequently reducing the field density due to the falling primary voltage flows in the third leg or in the third leg stored magnetism back over the yokes, preferably on the shorter path over the second leg and there some of its energy to the secondary winding or to the lamp. This would not be possible without the third leg because at this time due to the decaying mains sine voltage across the secondary winding no more energy could be given to the lamp. It puts the lamp will last longer than the sine wave would result.
Durch eine entsprechende Dimensionierung der Permeabilität des dritten Schenkels kann der Rückfluß aus diesem Schenkel genau in den Nulldurchgang der Primärspannung gelegt werden. Der magnetische Rückfluß magnetisiert dann den zweiten Schenkel in die kommende Gegenrichtung vor und bewirkt so das Erreichen der Zündspannung in der nächsten Phase zu einem früheren Zeitpunkt. Das dadurch kürzere Zeitintervall bis zum Anstieg der Sekundärspannung in der folgenden Phase bewirkt, daß auch die Ionisation in der Zündstrecke der Lampe weniger abgeklungen ist, und somit eine geringere Zündspannung für die Wiederzündung benötigt wird. By appropriately dimensioning the permeability of the third Thighs can flow back from this thigh exactly into the zero crossing the primary voltage. The magnetic reflux magnetizes then the second leg in the opposite direction and thus causes the ignition voltage to be reached in the next phase an earlier time. The shorter time interval until the rise of the secondary voltage in the following phase also causes the Ionization in the ignition path of the lamp has subsided less, and thus a lower ignition voltage is required for re-ignition.
Somit ergeben sich in jeder Phase kürzere Wiederzündzeiten und die Lampe brennt immer gleichmäßiger.This results in shorter re-ignition times and the lamp in every phase burns more steadily.
Die Erfindung ist anhand der nachfolgenden Figuren näher veranschaulicht.
Figur 1- zeigt eine erfindungsgemäße Schaltungsanordnung mit einem Transformator
Figur 2- zeigt den Aufbau der Magnetkernbleche für einen Transformator,
wie er in der Schaltungsanordnung gemäß
Figur 1 Verwendung findet
- Figure 1
- shows a circuit arrangement according to the invention with a transformer
- Figure 2
- shows the structure of the magnetic core sheets for a transformer, as it is used in the circuit arrangement of Figure 1
In Figur 1 ist eine erfindungsgemäße Schaltungsanordnung zum Betrieb einer Glimm-Leuchtstofflampe GLL vom Typ T4 mit einer Leistungsaufnahme von 5 W an einer Netz-Wechselspannung von 230 V dargestellt. Der Transformator TR weist drei Wicklungen auf, eine Primärwicklung Wa, einen ersten Wicklungsteil Wb1 der Sekundärwicklung und einen zweiten Wicklungsteil Wb2 der Sekundärwicklung. Die Primärwicklung Wa und der erste Teil der Sekundärwicklung Wb1 sind auf einem ersten Schenkel I des Magnetkerns (s. Figur 2) angebracht und elektrisch miteinander verbunden. Der zweite Wicklungsteil Wb2 der Sekundärwicklung ist auf dem zweiten Schenkel II des Magnetkerns angebracht. Außerdem ist in den Primärkreis ein Kaltleiter PTC geschaltet, der als Sicherungselement dient.In Figure 1 is a circuit arrangement according to the invention for operating a Glow fluorescent lamp GLL type T4 with a power consumption of 5 W on a mains AC voltage of 230 V. The transformer TR has three windings, a primary winding Wa, a first Winding part Wb1 of the secondary winding and a second winding part Wb2 of the secondary winding. The primary winding Wa and the first Part of the secondary winding Wb1 are on a first leg I of the magnetic core (see Figure 2) attached and electrically connected. The second winding part Wb2 of the secondary winding is on the second Leg II of the magnetic core attached. It is also in the primary circuit a PTC thermistor connected, which serves as a fuse element.
Figur 2 zeigt den Aufbau der E- und I-Kernbleche im Maßstab 2:1 für einen
Transformator TR, wie er in der in Figur 1 aufgeführten Schaltungsanordnung
verwendet wird. In der Figur sind die Abmessungen der Kernbleche in
mm aufgeführt. Die Kernbleche bestehen aus Eisenblech vom Typ St 12 und
haben eine Dicke von 0,63 mm. Für den Magnetkern des oben aufgeführten
Transformators werden 16 solcher Bleche benötigt. Figure 2 shows the structure of the E and I core sheets on a scale of 2: 1 for one
Transformer TR, as in the circuit arrangement shown in Figure 1
is used. In the figure, the dimensions of the core sheets are in
mm listed. The core sheets consist of iron sheets of
Die Wicklungen bestehen aus einem lackierten Kupferdraht und haben folgende
Abmessungen:
Claims (10)
- Circuit arrangement for operating glow fluorescent lamps (GLL) on a power system, the circuit arrangement containing a transformer (TR) with a magnet core, a primary circuit with a primary winding, which is connected to the power system, and a secondary circuit with a secondary winding, which is connected to the glow fluorescent lamp (GLL), characterized in that the magnet core of the transformer (TR) has at least three limbs (I, II, III) and two yokes, the primary winding (Wa) being wound onto a first limb (I), a first winding part (Wb1) of the secondary winding being wound onto the same first limb (I), and a second winding part (Wb2) of the secondary winding being wound onto a second limb (II), and at least a third limb (III) being free from windings.
- Circuit arrangement according to Claim 1, characterized in that all limbs and yokes of the magnet core have different cross sections.
- Circuit arrangement according to Claim 1, characterized in that the magnet core is assembled from E-core and I-core laminations.
- Circuit arrangement according to Claim 1, characterized in that the number of turns per unit length of the primary winding (Wa) is smaller than the number of turns per unit length of the first winding part (Wb1) of the secondary winding on the first limb (I) .
- Circuit arrangement according to Claim 1, characterized in that the number of turns per unit length of the second winding part (Wb2) of the secondary winding on the second limb (II) is larger than the sum of the number of turns per unit length of the primary winding (Wa) and of the first winding part (Wb1) of the secondary winding on the first limb (I).
- Circuit arrangement according to Claim 1, characterized in that the secondary circuit is electrically connected to the primary circuit.
- Circuit arrangement according to Claim 1, characterized in that the magnet core material of the at least one third limb (III), which is free from windings, differs in material and design from the other limbs.
- Circuit arrangement according to Claim 1, characterized in that the at least one third limb, which is free from windings, is connected to the yokes via at least one defined air gap.
- Circuit arrangement according to Claim 1, characterized in that the primary winding simultaneously forms the first winding part of the secondary winding on the first limb.
- Circuit arrangement according to Claim 1, characterized in that a PTC thermistor (PTC) is additionally connected into the primary circuit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19533323A DE19533323A1 (en) | 1995-09-08 | 1995-09-08 | Circuit arrangement for operating glow fluorescent lamps |
| DE19533323 | 1995-09-08 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0762807A2 EP0762807A2 (en) | 1997-03-12 |
| EP0762807A3 EP0762807A3 (en) | 1998-04-15 |
| EP0762807B1 true EP0762807B1 (en) | 2001-05-16 |
Family
ID=7771674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96113262A Expired - Lifetime EP0762807B1 (en) | 1995-09-08 | 1996-08-19 | Circuit for operating glow discharge lamps |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0762807B1 (en) |
| DE (2) | DE19533323A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10245871A1 (en) | 2002-09-30 | 2004-04-01 | Siemens Ag | Flat lighting unit |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3360753A (en) * | 1966-08-24 | 1967-12-26 | Sylvania Electric Prod | Ballast transformers having bridged air gap |
| DE6936329U (en) * | 1968-09-24 | 1973-11-08 | Elektrokovina Tovarna Elektrok | REACTOR OR TRANSFORMER. |
| US3684921A (en) * | 1970-08-31 | 1972-08-15 | Luis F De Leon | Illuminating apparatus and ballast circuit |
| US3898517A (en) * | 1974-06-14 | 1975-08-05 | Gen Electric | Ballast circuit |
| US3987339A (en) * | 1975-12-10 | 1976-10-19 | Frequency Technology, Inc. | Constant power lamp ballast |
| US4245177A (en) * | 1978-12-29 | 1981-01-13 | General Electric Company | Inverter for operating a gaseous discharge lamp |
| US4902942A (en) * | 1988-06-02 | 1990-02-20 | General Electric Company | Controlled leakage transformer for fluorescent lamp ballast including integral ballasting inductor |
| US5177407A (en) * | 1988-12-27 | 1993-01-05 | Gte Products Corporation | Glow discharge lamp having dual anodes and circuit for operating same |
-
1995
- 1995-09-08 DE DE19533323A patent/DE19533323A1/en not_active Withdrawn
-
1996
- 1996-08-19 EP EP96113262A patent/EP0762807B1/en not_active Expired - Lifetime
- 1996-08-19 DE DE59606898T patent/DE59606898D1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0762807A3 (en) | 1998-04-15 |
| DE19533323A1 (en) | 1997-03-13 |
| DE59606898D1 (en) | 2001-06-21 |
| EP0762807A2 (en) | 1997-03-12 |
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