| 摘要 |
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 unit s (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) actin g 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.
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