EP1994804A1 - Schaltungsanordnung mit einer übertragungsvorrichtung und betriebsverfahren für eine lampe an einer schaltungsanordnung mit einer übertragungsvorrichtung - Google Patents
Schaltungsanordnung mit einer übertragungsvorrichtung und betriebsverfahren für eine lampe an einer schaltungsanordnung mit einer übertragungsvorrichtungInfo
- Publication number
- EP1994804A1 EP1994804A1 EP07704668A EP07704668A EP1994804A1 EP 1994804 A1 EP1994804 A1 EP 1994804A1 EP 07704668 A EP07704668 A EP 07704668A EP 07704668 A EP07704668 A EP 07704668A EP 1994804 A1 EP1994804 A1 EP 1994804A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- circuit arrangement
- potential
- secondary side
- voltage
- arrangement according
- 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.)
- Withdrawn
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
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/02—Details
- H05B41/04—Starting switches
- H05B41/042—Starting switches using semiconductor devices
Definitions
- the present invention relates to a Wegungsanord ⁇ tion with a transmission device having a primary side and a secondary side, wherein the primary ⁇ side and the secondary side are galvanically separated from each other, wherein the primary side has a terminal for a supply voltage and connected to a first reference potential is, wherein the secondary side comprises a first and a second output line, which are normally not coupled to a reference potential and which form an output terminal to which a voltage for a consumer can be provided. It also relates to an operating method for a lamp on such a circuit arrangement with a transmission device.
- FIGS. 1 and 2 show a generic Heidelbergungsanord ⁇ tion.
- the transmission device which has a primary side P and a secondary side S, realized by a transformer.
- the transmission behaves ⁇ nis was in the example chosen such that from an input voltage U E ⁇ of 800 V, an output voltage U A of 5 kV is produced.
- the output voltage is between a first th output line ALI and a second output line AL2.
- a lamp LA is connected.
- the secondary side normally has no reference potential.
- the capacitors Cl and C2 are merely parasitic capacitances between the lamp LA and the environment.
- the capacitance C3 represents parasitic Kop ⁇ pelkapaztician between the primary side P and the secondary ⁇ page S.
- means are provided, a short circuit between to detect the two output lines ALI and AL2 on the secondary side. As has been shown, however, there are still failures of such circuits.
- the object of the present invention is therefore to develop the above-mentioned circuit arrangement or the aforementioned method of operation for a lamp to ei ⁇ ner such a circuit arrangement such that failures of the circuit arrangement can be largely prevented.
- the invention is based on the finding that a failure of the circuit arrangement can be caused by one of the two output lines ALI or AL2 being connected to a second reference potential in the event of a fault, ie, by mistake, the second reference point being
- the potential may represent the first reference potential or a grounding or an OV line or the housing of the circuit arrangement.
- FIGS. 2 a and 2 b The corresponding voltage ratios for the example of FIG. 1 are shown in FIGS. 2 a and 2 b.
- the capacitance C 3 (see FIG. 1) is set to 0 for the representation of FIGS. Fig. 2a shows the behaves ⁇ nit without connecting one of the output lines of the ALI o- AL2 the secondary side with a second clutchspoten- TiAl.
- Is shown here is a cross section through which the primary and secondary side comprising transformer, wherein the cross section of the turns of the primary side and the coils wound thereon, the secondary side S Darge ⁇ .
- the primary side and the secondary side are separated by an insulating layer IS.
- the output voltage U A on the secondary side is without such a reference potential Be ⁇ that approximately on the left side - yield 2.5 kV and on the right side of + 2.5 kV.
- the center of the secondary side is about 0 V.
- the Po ⁇ tentialdifferenz between the upper and lower surfaces of the insulating layer is a maximum of 2.5 kV IS (namely, on the left side of the transformer shown).
- the specified voltage values are of course instantaneous values within a Wech ⁇ selhardszyklus. -A-
- FIG. 2b shows the conditions when the output line AL2 is short-circuited with the first reference potential in an example case of a fault by way ⁇ adopted.
- the conditions on the primary side P are unchanged from the illustration of FIG. 2a.
- a Potenti ⁇ al also forms as a result of the short circuit with the first reference potential Be ⁇ on the left side of 0 V from. Accordingly, from a potential of 5 kV forms on the computational ⁇ th side of the secondary side S.
- the potential difference, which now acts on the insulating layer IS is 4.2 kV on the right side of the transformer. If, in spite of the usual tolerances, the insulating layer is dimensioned for the case of FIG. 2 a, this leads, in the case of FIG. 2 b, to burn-through and thus failure of the circuit arrangement .
- causes that at least one of the output lines ALI, AL2 are connected on the secondary side with a second reference potential may be: pinch seal during assembly, inadvertent release of a Termina ⁇ dung, or even vibration.
- Particularly critical is the situation when there is no direct short circuit of at least one of the output lines ALI, AL2 with a second reference potential, but the second reference potential and the corresponding output line so ⁇ wide approach that may lead to a rollover. This creates arcs that can easily trigger a fire.
- the detection of such arcs is particularly difficult, since usually the output power of the lamps LA to be driven by a circuit arrangement according to the invention is at least 100W a apparent power of at least 300 VA. With regard to these high powers, an arc with a power of approx. 10 W can hardly be detected, since such a power lies within the usual lamp tolerances.
- the solution according to the present invention consists in that change of a measured voltage potential Zvi ⁇ rule to detect the normal and fault conditions.
- the detection device in this case comprises a device for picking up a measuring voltage potential on the secondary side ⁇ and apparatus for determining whether the measuring voltage potential is in an allowable range. Since ⁇ at the measuring voltage potential can be readily related to the first reference potential. Is evaluated a potential in the center of the secondary side S in the example, the result (to compare the figures 2a and 2b) ei ⁇ ne displacement of the measured voltage potential of 0 V to 2.5 kV.
- a particularly preferred embodiment is characterized in that the determining device is designed to evaluate the amplitude and / or the temporal change of the measuring voltage potential.
- the measuring voltage potential is a potential on the secondary side, which is changed by a coupling of the first and / or the second output line to a second reference potential. Should not be eligible measuring points come on the Sekundärsei ⁇ te, where there is a risk that the first and / or the second output line of the coupling despite with a second reference potential gives no change.
- the second reference potential represents, in particular, the first reference potential or a grounding or an O-V line or the housing, in particular the rear panel, of the circuit arrangement.
- the secondary side of a measuring point on ⁇ wherein the potential is the potential measuring voltage at the measuring point and the measuring point forms a Symmet- rieddling.
- This variant offers the advantage that it can be realized with a very simple evaluation because the symmetry point usually in idea ⁇ ler, a voltage potential of 0 V is present currency ⁇ rend there in case of failure, a voltage potential with this very high compared amount can be measured.
- the transfer device comprises a transformer
- the measurement point whose Po ⁇ tential is the measured voltage potential especially be ⁇ vorzugt the symmetry point of the secondary side of the transformer's represent.
- the secondary side may comprise a voltage divider, in particular having a capacitive voltage divider which is coupled between the first and the second output line, the potential at the tapping point of the voltage divider, the measuring voltage ⁇ potential represents.
- the device for tapping the measuring voltage potential comprises a capacitor. Because the Input voltage U E represents an AC voltage in most cases, the measuring voltage potential varies with the frequency of this AC voltage and can therefore be easily transferred with a capacitor. With appropriate dimensioning of the capacitor, the voltage drop across the capacitor output is only a low voltage - compared to the voltage applied to the lamp LA high voltage - and can therefore be safely evaluated by a user. For evaluation, the drop across the capacitor output signal can be compared with values stored in a table of a storage unit, or voltage signal with a reference ⁇ .
- the circuit arrangement comprises a printed circuit board, which in particular has an insulation value of CTI II or better, which corresponds to a dielectric strength of 400 to 600 V, wherein the capacitor is designed as a plate capacitor and by a respective metal surface, in particular by a copper surface , is formed on the top and the bottom side of the circuit board.
- the shifts in the measuring voltage potential are of the order of more than 1 kV, in which case the capacitance of the plate capacitor is less than 50 pF, preferably less than 10 pF.
- the voltage U A which can be provided during operation of the circuit arrangement at the output terminal of the circuit arrangement is more than 1 kV.
- Figure 1 is a schematic representation of a known from the prior art circuit arrangement.
- FIG. 2a shows different schematic representation of instantaneous voltage potentials which form in the normal ⁇ case the operation of the circuit of FIG. 1;
- FIG. 2b shows different schematic representation of instantaneous voltage potentials in the error ⁇ case form to the operation of the circuit of FIG. 1;
- Fig. 3 in a schematic representation of the structure of an embodiment of a scarf ⁇ tion arrangement according to the invention.
- Fig. 3 shows a schematic representation of an embodiment of a circuit arrangement according to the invention, in which an input voltage U E , which is preferably a square-wave voltage, is applied to the primary side P of a transformer.
- the amount of voltage U E is depending on the application between about 50 and 400 V; the frequency is in the range between approx. 50 to 100 kHz.
- the transformer here comprises six modular units L1, L2, L3, L4, L5, L6, which are connected in parallel on the primary side P and are connected in series on the secondary side S.
- the first output line ALI and the second output line AL2 form an output terminal at which the output voltage U A is provided to a lamp LA.
- the potential between the modular units L3 and L4 on the secondary side S of the transformer is supplied to a plate capacitor C P.
- the ohmic resistors Rl and R2 are used together with the capacitor C P to adjust the amplitude of the signal at the point PO, the Ein ⁇ gang a charge pump, which includes the diodes Dl and D2 and the capacitor C s .
- a diode D3 serves Ver ⁇ hindrance of feedback from a device 10 for determining whether the tapped at point Pl measurement voltage potential is in an allowable range.
- the capacitor C P is formed as a plate capacitor.
- a realization as a single component would result in high costs and additional assembly steps.
- a realization by a series connection of several as SMD components realized capacitors would result in an increased space requirement and also additional assembly steps.
- the lamp LA is designed as a flat lamp, in particular as a barrier-free discharge lamp without mercury with a height of about 5 mm.
- the circuit arrangement is advantage to a circuit board mon ⁇ , wherein the plate capacitor C P by two copper surfaces respectively opposite on the top and the bottom side of the printed circuit board is formed, wherein its capacity is less than 10 pF.
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
- Dc-Dc Converters (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006008486A DE102006008486A1 (de) | 2006-02-23 | 2006-02-23 | Schaltungsanordnung mit einer Übertragungsvorrichtung und Betriebsverfahren für eine Lampe an einer Schaltungsanordnung mit einer Übertragungsvorrichtung |
| PCT/EP2007/051639 WO2007096369A1 (de) | 2006-02-23 | 2007-02-21 | Schaltungsanordnung mit einer übertragungsvorrichtung und betriebsverfahren für eine lampe an einer schaltungsanordnung mit einer übertragungsvorrichtung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1994804A1 true EP1994804A1 (de) | 2008-11-26 |
Family
ID=38002203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07704668A Withdrawn EP1994804A1 (de) | 2006-02-23 | 2007-02-21 | Schaltungsanordnung mit einer übertragungsvorrichtung und betriebsverfahren für eine lampe an einer schaltungsanordnung mit einer übertragungsvorrichtung |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8193722B2 (de) |
| EP (1) | EP1994804A1 (de) |
| DE (1) | DE102006008486A1 (de) |
| TW (1) | TW200740293A (de) |
| WO (1) | WO2007096369A1 (de) |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5241443A (en) * | 1991-01-14 | 1993-08-31 | Jannock Electrical Products Inc. | Transformer fault protection device |
| US5448443A (en) * | 1992-07-29 | 1995-09-05 | Suvon Associates | Power conditioning device and method |
| DE69410510T2 (de) * | 1993-03-09 | 1999-02-18 | Everbrite Inc., Greenfield, Wisconsin | Schutzschaltung für eine Leistungsversorgung einer Beleuchtungsrohre |
| US5745334A (en) * | 1996-03-25 | 1998-04-28 | International Business Machines Corporation | Capacitor formed within printed circuit board |
| US5892646A (en) * | 1997-05-05 | 1999-04-06 | Ventex Group, Llc | Ground fault protection of gas lamp power supplies |
| US6111732A (en) * | 1998-04-23 | 2000-08-29 | Transfotec International Ltee | Apparatus and method for detecting ground fault |
| TW393877B (en) | 1998-09-28 | 2000-06-11 | Compeq Mfg Co Ltd | A panel-type resistance capacitor and its production method |
| US6504691B1 (en) * | 1999-07-13 | 2003-01-07 | Kabushiki Kaisha Sanyo Denki Seisa Kusho | Safety enhanced transformer circuit |
| US6804129B2 (en) * | 1999-07-22 | 2004-10-12 | 02 Micro International Limited | High-efficiency adaptive DC/AC converter |
| US6680583B2 (en) * | 2001-03-09 | 2004-01-20 | Lecip Corporation | Sign lamp lighting transformer with protective functions |
| KR100467834B1 (ko) * | 2002-12-23 | 2005-01-25 | 삼성전기주식회사 | 커패시터 내장형 인쇄회로기판 및 그 제조 방법 |
| US7199988B2 (en) * | 2003-06-27 | 2007-04-03 | Lecip Corporation | Discharge tube lighting transformer with protective circuit against non-grounding of ground terminal |
-
2006
- 2006-02-23 DE DE102006008486A patent/DE102006008486A1/de not_active Withdrawn
-
2007
- 2007-02-16 TW TW096106046A patent/TW200740293A/zh unknown
- 2007-02-21 US US12/224,290 patent/US8193722B2/en not_active Expired - Fee Related
- 2007-02-21 WO PCT/EP2007/051639 patent/WO2007096369A1/de not_active Ceased
- 2007-02-21 EP EP07704668A patent/EP1994804A1/de not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2007096369A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200740293A (en) | 2007-10-16 |
| US20090140662A1 (en) | 2009-06-04 |
| DE102006008486A1 (de) | 2007-08-30 |
| WO2007096369A1 (de) | 2007-08-30 |
| US8193722B2 (en) | 2012-06-05 |
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Legal Events
| Date | Code | Title | Description |
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| 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 |
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| 17P | Request for examination filed |
Effective date: 20080723 |
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| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT DE FR GB IT |
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| 17Q | First examination report despatched |
Effective date: 20081230 |
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| DAX | Request for extension of the european patent (deleted) | ||
| RBV | Designated contracting states (corrected) |
Designated state(s): AT DE FR GB IT |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: OSRAM AG |
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| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: OSRAM GMBH |
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| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: OSRAM GMBH |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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| 18D | Application deemed to be withdrawn |
Effective date: 20140902 |