GB966425A - Circuit for operating electric discharge lamps - Google Patents
Circuit for operating electric discharge lampsInfo
- Publication number
- GB966425A GB966425A GB2486262A GB2486262A GB966425A GB 966425 A GB966425 A GB 966425A GB 2486262 A GB2486262 A GB 2486262A GB 2486262 A GB2486262 A GB 2486262A GB 966425 A GB966425 A GB 966425A
- Authority
- GB
- United Kingdom
- Prior art keywords
- winding
- circuit
- windings
- voltage
- tapping
- 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
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
- H05B41/14—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
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
966,425. Supply systems for discharge lamps. GENERAL ELECTRIC CO. Ltd. June 25, 1963 [June 28, 1962], No. 24862/62. Heading H2H. To reduce the size of an auto-connected strayfield transformer which supplies a discharge lamp 3, a power factor correction capacitor 8 is connected across the primary winding 6 and part of the secondary winding 7, the position of the tapping on this winding being found by experiment. In the circuit of Fig. 1, the voltages across windings 6, 7 are approximately equal when members 3, 8 are not connected, and the capacitor value and the tapping point are chosen so that when capacitor 8 is connected the overall open-circuit voltage across the windings 6, 7 is increased by about a quarter of the voltage across either winding to a value about twice the supply voltage. To produce an open circuit voltage lower or greater than that of the circuit of Fig. 1, the end of winding 7 is connected to a tapping on winding 6, Fig. 2 (not shown) or supply terminal 2 is connected to a tapping on winding 6, Fig. 3 (not shown), equality of winding voltage in the case of the former modification being determined for the winding 7 and that part of the winding 6 in the secondary (lamp) circuit. Heating windings may be provided at the ends of windings 6, 7 should the lamp have heatable electrodes, Fig. 4 (not shown). Typical design values are given for the stray-field transformer which may supply two or more series-connected lamps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2486262A GB966425A (en) | 1962-06-28 | 1962-06-28 | Circuit for operating electric discharge lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2486262A GB966425A (en) | 1962-06-28 | 1962-06-28 | Circuit for operating electric discharge lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB966425A true GB966425A (en) | 1964-08-12 |
Family
ID=10218424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2486262A Expired GB966425A (en) | 1962-06-28 | 1962-06-28 | Circuit for operating electric discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB966425A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2140229A (en) * | 1983-05-17 | 1984-11-21 | Emi Plc Thorn | Discharge lamp start and supply circuit |
| GB2193393B (en) * | 1986-07-23 | 1990-11-21 | To Yuen | A starting and operating circuit for a fluorescent light |
-
1962
- 1962-06-28 GB GB2486262A patent/GB966425A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2140229A (en) * | 1983-05-17 | 1984-11-21 | Emi Plc Thorn | Discharge lamp start and supply circuit |
| GB2193393B (en) * | 1986-07-23 | 1990-11-21 | To Yuen | A starting and operating circuit for a fluorescent light |
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