Failure detecting device for elevator drive power source and...

B - Operations – Transporting – 66 – B

Patent

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B66B 5/02 (2006.01)

Patent

CA 2545146

In a feeder circuit for operating a safety device of an elevator, a charging capacitor for actuating an actuator through discharge is employed. A failure detecting device for detecting the presence or absence of a capacitance shortage of a charging capacitor is also electrically connected to the feeder circuit. The failure detecting device has a memory in which a lower limit and upper limit of a charging time at the time when the charging capacitor is in normal operation are stored, and a CPU which is capable of measuring the charging time of the charging capacitor and detects whether or not the charging time is between the lower limit and the upper limit. When the charging time is between the lower limit and the upper limit, the CPU determines that there is no capacitance shortage of the charging capacitor.

Un circuit d'alimentation électrique pour le fonctionnement d'un dispositif d'arrêt d'urgence pour un élévateur emploie un condensateur de charge pour activer un actionneur pour la décharge. En outre, un détecteur de défaut qui contrôle la perte de capacité du condensateur de charge est connecté électriquement au circuit d'alimentation électrique. Le détecteur de défaut présente une mémoire stockant les limites supérieures et inférieures du temps de charge quand le condensateur est normal et présente une UC capable de mesurer le temps de charge et de décider si oui ou non le temps de charge chute entre les limites supérieures et les limites inférieures. L'UC estime que la capacité du condensateur de charge n'est pas perdue si le temps de charge chute entre les limites supérieures et les limites inférieures.

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