GB730656A - Improvements in and relating to constant current circuits for operating electric discharge lamps - Google Patents
Improvements in and relating to constant current circuits for operating electric discharge lampsInfo
- Publication number
- GB730656A GB730656A GB18228/52A GB1822852A GB730656A GB 730656 A GB730656 A GB 730656A GB 18228/52 A GB18228/52 A GB 18228/52A GB 1822852 A GB1822852 A GB 1822852A GB 730656 A GB730656 A GB 730656A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- winding
- constant current
- electric discharge
- discharge lamps
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
730,656. Supply systems for space discharge apparatus; transformers; automatic current regulation. BRITISH THOMSON-HOUSTON CO., Ltd. July 18, 1952 [July 18, 1951], No. 18228/52. Classes 38 (2) and 38 (4). A constant current circuit for operating one or more electric discharge lamps 6 comprises a double wound transformer having a core structurally split into two portions 1, 3 separated from each other by an air gap 5 and upon which are respectively wound a primary and a secondary winding 2, 4, the latter being connected to the lamp(s) through a capacitor 7 of such value that the circuit operates at a power factor near unity, and the secondary core portion 3 is saturated by the lamp discharge current, while the primary circuit includes unsaturated leakage reactance. The transformer may have more than one secondary winding 4 on the core portion 3 for supplying more than one lamp in a similar manner to that shown. The capacitor 7 is also of such value as to resonate at the supply frequency with the combined reactance of winding 4 and leakage reactance of the primary circuit comprising winding 2. For starting a switch 8 is provided.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR730656X | 1951-07-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB730656A true GB730656A (en) | 1955-05-25 |
Family
ID=9115334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18228/52A Expired GB730656A (en) | 1951-07-18 | 1952-07-18 | Improvements in and relating to constant current circuits for operating electric discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB730656A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2413018A (en) * | 2004-04-06 | 2005-10-12 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Converter circuit with coupled inductances |
-
1952
- 1952-07-18 GB GB18228/52A patent/GB730656A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2413018A (en) * | 2004-04-06 | 2005-10-12 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Converter circuit with coupled inductances |
| GB2413018B (en) * | 2004-04-06 | 2006-12-06 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Converter circuit with coupled inductances |
| US7154233B2 (en) | 2004-04-06 | 2006-12-26 | Patent-Treuhand-Gesellschaft Fur Elektrisch Gluhlampen Mbh | Converter circuit with coupled inductances having asymmetrical air gap arrangement |
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