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1. (WO1998052273) SWITCHED-MODE POWER SUPPLY, AN ELECTRIC SHAVER, AND A METHOD OF CONVERTING DIRECT VOLTAGES
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/052273 International Application No.: PCT/IB1998/000393
Publication Date: 19.11.1998 International Filing Date: 19.03.1998
IPC:
H02J 7/00 (2006.01) ,H02M 1/10 (2006.01)
H ELECTRICITY
02
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
J
CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
7
Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
H ELECTRICITY
02
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
M
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
1
Details of apparatus for conversion
10
Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from ac or dc
Applicants:
KONINKLIJKE PHILIPS ELECTRONICS N.V. [NL/NL]; Groenewoudseweg 1 NL-5621 BA Eindhoven, NL
PHILIPS AB [SE/SE]; Kottbygatan 7 Kista S-164 85 Stockholm, SE (SE)
Inventors:
VAN LEEST, Paulus, Johannes, Carolus; NL
Agent:
HESSELMANN, Gerardus, J., M.; Internationaal Octrooibureau B.V. P.O. Box 220 NL-5600 AE Eindhoven, NL
Priority Data:
97201451.814.05.1997EP
Title (EN) SWITCHED-MODE POWER SUPPLY, AN ELECTRIC SHAVER, AND A METHOD OF CONVERTING DIRECT VOLTAGES
(FR) ALIMENTATION A DECOUPAGE, RASOIR ELECTRIQUE ET PROCEDE DE CONVERSION DE TENSIONS CONTINUES
Abstract:
(EN) A switched-mode power supply comprises a transformer (2) having a primary winding (4) connected to a first pair of direct voltage terminals (8, 10) via a switching transistor (6) and having a secondary winding (22) which powers a load (24) via a diode (26). The switched-mode power supply further comprises a second switchingtransistor (34) which, together with the secondary winding (22), the load (24), the diode (26) and a second pair of direct voltage terminals (38, 40) is configured as a forward converter (24) to power the load (24) from a comparatively low direct voltage (12 V d.c.).
(FR) Une alimentation à découpage comprend un transformateur (2) doté d'un enroulement primaire (4) connecté à une première paire de bornes à tension continue (8, 10) par l'intermédiaire d'un transistor de commutation (6), et d'un deuxième enroulement primaire (22) qui alimente une charge par l'intermédiaire d'une diode (26). Ladite alimentation à découpage comporte également un deuxième transistor de commutation (34) qui, conjointement avec l'enroulement secondaire (22), la charge (24), la diode (26) et une deuxième paire de bornes à tension continue (38, 40), est configurée comme un convertisseur direct (24) pour alimenter la charge (24) à partir d'une tension continue comparativement basse (12 V CC).
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Designated States: JP
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0919080JP2000514998