H - Electricity – 02 – K
Patent
H - Electricity
02
K
H02K 47/02 (2006.01) H02P 9/30 (2006.01) H02M 1/00 (2006.01)
Patent
CA 2218023
The invention concerns a circuit designed to supply, without the need for a battery, the electronic control unit of a machine powered by an internal- combustion engine, in particular a hand-held machine, with a nominal d.c. voltage (Vcc), the machine having an a.c. generator driven by the engine to produce a voltage (Ug) which is dependent on the running speed of the internal- combustion engine. The circuit (10) has a first rectifier circuit (D1, C1) which converts the generator voltage (Ug) into an intermediate d.c. voltage (Uz) which ensures that the electronics of the machine is supplied with the necessary nominal d.c. voltage, even during the start phase, without the need for additional batteries. In order to provide a simple, robustly built circuit of this kind, the invention proposes that the circuit (10) also includes first means (L, Ic2, D3, C3) which are connected downstream to the first rectifier circuit (D1, C1) and which generate the nominal voltage (Vcc) by controlled up consversion of the intermediate voltage (Uz) for as long as, at low running speeds, the intermediate voltage (Uz) is lower than the nominal voltage (Vcc).
L'invention concerne un circuit (10) destiné à l'alimentation sans batterie de la commande électronique d'une machine entraînée par un moteur à combustion interne, notamment une machine tenue à la main avec une tension continue nominale (Vcc), cette machine présentant un générateur de tension alternative commandé par un moteur à combustion interne, lequel générateur délivre une tension (Ug) fonction de la vitesse du moteur à combustion interne. Ce circuit (10) comprend un premier circuit redresseur (D1, C1) qui transforme la tension du générateur (Ug) en une tension continue intermédiaire (Uz), lequel circuit garantit que l'électronique d'une machine entraînée par un moteur reçoive, sans batteries de renfort, la tension nominale nécessaire, même dans la phase de démarrage. Pour qu'un tel circuit soit, à la fois, de construction simple et robuste, l'invention propose que le circuit (10) comprenne en outre des premiers moyens (L, Ic2, D3, C3) qui soient connectés en aval du premier circuit redresseur (D1, C2) et qui produisentela tension nominale (Vcc) par transformation régulée de la tension continue intermédiaire (Uz) ver le haut aussi longtemps qu'à petites vitesses la tension continue intermédiaire (Uz) est inférieure à la tension continue nominale (Vcc).
Klare Hartmut
Singer Andreas
Dolmar Gmbh
Shapiro Cohen
LandOfFree
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