EP 0124864 A1 19841114 - Power control apparatus with optical isolation feedback means.
Title (en)
Power control apparatus with optical isolation feedback means.
Title (de)
Leistungssteuerungsgerät mit opto-isolierter Rückkupplung.
Title (fr)
Appareil de contrÔle de puissance avec moyen de contre-réaction à opto-couplage.
Publication
Application
Priority
US 49228583 A 19830506
Abstract (en)
The invention comprises transformerless power supply apparatus particularly adapted for supplying regulated power to critically sensitive loads such as tungsten lamp filament loads of designed power rating. Power control is achieved by a triggered triac in series with the load, and regulation is provided by a feedback circuit, voltage or current, which generates the triac trigger signal periodically as a function of the load voltage or current. The feedback circuit is provided with a photo isolator for eliminating premature triggering of the triac due to transients. A timing circuit is also provided for timing the power on condition, the output of which is photo isolator coupled to the triac feedback circuit.
IPC 1-7
IPC 8 full level
G05F 1/10 (2006.01); G05F 1/455 (2006.01); H05B 39/08 (2006.01); H05B 41/392 (2006.01)
CPC (source: EP)
G05F 1/455 (2013.01); H05B 39/083 (2013.01); H05B 41/392 (2013.01)
Citation (search report)
- [X] US 4224563 A 19800923 - HARDY HERBERT L
- [Y] US 4344071 A 19820810 - ALLEN GLENN R
- [A] US 4064404 A 19771220 - WILLMOTT COLIN BARNS, et al
- [Y] ELECTRICAL DESIGN NEWS, vol. 26, no. 9, 29th April 1981, pages 176-178, Boston, USA; T. HOPKINS: "Regulate lamp output with one IC"
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0124864 A1 19841114; AU 2760184 A 19841108; BR 8402089 A 19841211; JP S6089221 A 19850520; ZA 843313 B 19841224
DOCDB simple family (application)
EP 84104907 A 19840502; AU 2760184 A 19840502; BR 8402089 A 19840504; JP 9082184 A 19840507; ZA 843313 A 19840503