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Emergency power supply device for lift systems

  • US 20030089556A1
  • Filed: 09/24/2002
  • Published: 05/15/2003
  • Est. Priority Date: 03/31/2000
  • Status: Active Grant
First Claim
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1. Emergency current supply equipment (10) for lift installations with electric motor drives, which comprises an energy storage unit (11) for electric energy, which bridges over temporary drops or interruptions in mains voltage and ensures the performance of an evacuation travel in the event of failure of the mains supply during a lift travel, in that it supplies energy to all electrical components, which participate in the evacuation travel, of the lift installation at least until such time as the lift cage has reached the level of a storey, characterised in that the energy storage unit (11) comprises capacitors in the form of supercapacitors (13).

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