On/off control device for power source unit

H - Electricity – 02 – H

Patent

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Details

H02H 3/24 (2006.01) H02J 7/00 (2006.01)

Patent

CA 2250675

A voltage detection circuit 2 detects a voltage of a battery 1 and, when the voltage thus detected is within a tolerable input voltage of a power source unit 5, an on/off signal transmitter circuit 4 allows an on/off signal generator circuit 3 to transmit an on/off signal S2 to the power source unit 5. When the voltage of the battery 1 becomes lower than a lower limit of the tolerable input voltage range of the power source unit 5 due to increase of a power consumption of a load 6 thereof, the on/off signal transmitter circuit 4 transmits an off signal S3 to the power source unit 5 regardless of the on/off signal S2 from the on/off signal generator circuit 3 . Thus, it is possible to prevent an erroneous operation of the load due to abnormal operation of the power source unit.

Un circuit de détection de tension 2 détecte la tension d'une batterie 1 et, lorsque la tension ainsi détectée se situe dans une plage de tensions d'entrée tolérables d'une source d'alimentation 5, un circuit de transmission de signal de marche/arrêt 4 permet à un circuit générateur de signal de marche/arrêt 3 de transmettre un signal de marche/arrêt S2 à la source d'alimentation 5. Lorsque la tension de la batterie 1 passe sous la limite inférieure de la plage de tensions d'entrée tolérables de la source d'alimentation 5 afin d'accroître la consommation d'énergie d'une charge 6, le circuit de transmission de signal de marche/arrêt 4 transmet un signal d'arrêt S3 à la source d'alimentation 5 sans égard au signal de marche/arrêt S2 provenant du circuit générateur de signal de marche/arrêt 3. Il est ainsi possible d'empêcher la mise en marche par erreur de la charge en raison d'un fonctionnement anormal de la source d'alimentation.

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