Device and method to reduce the power supply connection...

B - Operations – Transporting – 66 – B

Patent

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Details

B66B 1/30 (2006.01)

Patent

CA 2407052

The invention relates to lift systems comprising electric drive systems. The inventive lift systems are provided with devices (10) for reducing the power of the supply connection. Said devices are provided with energy storage units (11) that are exclusively or partially formed by so-called super capacities (13). The inventive device (10) compensates power peaks during starting and braking procedures by exchanging energy between the energy storage unit (11) and the motor/s and distributes a portion of the power which is consumed during driving over part of the standstill time. Super capacities (13) acting as energy storage devices can cope with a higher number of charging and discharging cycles compared with electrochemically acting accumulators, whereby said cycles involve a high current intensity and said number is many times higher.

La présente invention concerne des installations d'ascenseur comprenant des systèmes d'entraînement électriques. Ces installations d'ascenseur sont pourvues de dispositifs (10) permettant de réduire la puissance de l'alimentation par le secteur. Ces dispositifs présentent des unités d'accumulation d'énergie (11), qui sont exclusivement ou partiellement constituées de supercondensateurs (13). Le dispositif (10) selon cette invention permet de compenser les pointes de puissance lors des processus de démarrage et de freinage, par un échange d'énergie entre l'unité d'accumulation d'énergie (11) et l'alimentation du moteur et de distribuer une partie de la puissance consommée lors d'un trajet sur une partie de la période d'arrêt. Les supercondensateurs (13), en tant que systèmes d'accumulation d'énergie, supportent un nombre beaucoup plus grand de cycles de charge et de décharge, à intensités de courant élevées, par rapport à des accumulateurs électrochimiques.

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