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Simulation and analysis of an emergency lowering system for crane applications

Simulation und Analyse eines Notfall-Absenksystem für Krananwendungen

  1. M.Sc. Tommi Kivelä Karlsruher Institut für Technologie, Institute für Fördertechnik und Logistiksysteme, Fachbereich Sichere Mechatronische Systeme der Intralogistik
  2. Prof. Dr.-Ing. Golder Markus Karlsruher Institut für Technologie, Institute für Fördertechnik und Logistiksysteme, Fachbereich Sichere Mechatronische Systeme der Intralogistik

Abstracts

An emergency lowering system for use in safety critical crane applications is discussed. The system is used to safely lower the payload of a crane in case of an electric blackout. The system is based on a backup power source, which is used to operate the crane while the regular supply is not available. The system enables both horizontal and vertical movements of the crane. Two different configurations for building the system are described, one with an uninterruptible power source (UPS) or a diesel generator connected in parallel to the crane’s power supply and one with a customized energy storage connected to the intermediate DC-link in the crane. In order to be able to size the backup power source, the power required during emergency lowering needs to be understood. A simulation model is used to study and optimize the power used during emergency lowering. The simulation model and optimizations are verified in a test hoist. Simulation results are presented with non-optimized and optimized controls for two example applications: a paper roll crane and a steel mill ladle crane. The optimizations are found to significantly reduce the required power for the crane movements during emergency lowering.

Kurzfassung zu "Simulation und Analyse eines Notfall-Absenksystem für Krananwendungen" folgt in Kürze

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Any party may pass on this Work by electronic means and make it available for download under the terms and conditions of the free Digital Peer Publishing License. The text of the license may be accessed and retrieved at http://www.dipp.nrw.de/lizenzen/dppl/fdppl/f-DPPL_v1_de_11-2004.html.

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