GB545854A - Improvements in and relating to electric discharge lamp circuits - Google Patents
Improvements in and relating to electric discharge lamp circuitsInfo
- Publication number
- GB545854A GB545854A GB4112/41A GB411241A GB545854A GB 545854 A GB545854 A GB 545854A GB 4112/41 A GB4112/41 A GB 4112/41A GB 411241 A GB411241 A GB 411241A GB 545854 A GB545854 A GB 545854A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wave
- commutator
- primary
- march
- condenser
- 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
- 230000004907 flux Effects 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 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
- H05B41/24—Circuit arrangements in which the lamp is fed by high frequency AC, or with separate oscillator frequency
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
- H02M7/54—Conversion of DC power input into AC power output without possibility of reversal by dynamic converters
- H02M7/58—Conversion of DC power input into AC power output without possibility of reversal by dynamic converters using mechanical contact-making and -breaking parts to interrupt a single potential
- H02M7/62—Conversion of DC power input into AC power output without possibility of reversal by dynamic converters using mechanical contact-making and -breaking parts to interrupt a single potential with electromagnetically-operated vibrating contacts, e.g. chopper
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
545,854. Electric supply circuits for discharge lamps. BRITISH THOMSON-HOUSTON CO., Ltd. March 27, 1941, No. 4112. Convention date, March 30, 1940. [Classes 38 (ii) and 38 (iv)] An A.C. supply for discharge lamps for train lighting is obtained from the low voltage D.C. train batteries by means of vibrating switches 2 furnishing a square-topped wave-form which is modified by means of saturable reactances and resonant circuits to produce a wave-form shown at C in Fig. 2, while the wave-form drawn from the commutator has the shape shown at B, B<SP>1</SP> with a flat portion between 33 and 35 conducive to sparkless commutation. The primary 17 of a leakage transformer is connected across the feeders 7 which are supplied by the commutator 2 in series with a capacity 22 constituting a resonant circuit tuned to a frequency slightly higher than that of the commutator. A magnetic shunt to the flux of the primary winding is in two parts (1) which includes the slots 19 and serves to ballast the lamp, (2) the part below the slots which saturates for the greater part of the current wave traversing the primary and affects the wave-form. The lamp is connected in series with the secondary 20 across the condenser 22 with the result that it is supplied by a current of wave-form shown at C steep where is crosses the zero axis thus minimizing flicker. By connecting a non-linear shunt consisting of the saturable-core reactor 26 and the resistance 27 across the condenser, maintenance of uniform frequency of the resonant circuit and of sparkless commutation is provided for even if the D.C. applied voltage varies and if the load suddenly varies as by removal of lamps.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US545854XA | 1940-03-30 | 1940-03-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB545854A true GB545854A (en) | 1942-06-16 |
Family
ID=21992116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4112/41A Expired GB545854A (en) | 1940-03-30 | 1941-03-27 | Improvements in and relating to electric discharge lamp circuits |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB545854A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1049003B (en) * | 1956-03-15 | 1959-01-22 | Patra Patent Treuhand | Operating equipment for electric discharge lamps, in particular for use in railway vehicles |
-
1941
- 1941-03-27 GB GB4112/41A patent/GB545854A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1049003B (en) * | 1956-03-15 | 1959-01-22 | Patra Patent Treuhand | Operating equipment for electric discharge lamps, in particular for use in railway vehicles |
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