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Foldable slewing crane
Pedrosa, Delfim; Teixeira, Patrício; Crespo, Joel; Costa, Daniel; Esteves, João SenaThis paper describes a slewing crane with electromagnet, operated by three three-phase induction motors but powered from a single-phase power supply. A switchboard drives the motors and the electromagnet. From its seat – mounted on the crane – an operator can make the crane arm slew left or right. The electromagnet can be moved back, forward, up or down and is capable of lifting 80kg loads. Crane slewing is lim...
Electromagnet and switchboard for slewing crane
Pedrosa, Delfim; Teixeira, Patrício; Esteves, João SenaThis paper presents an electromagnet and a switchboard used on a science fair slewing crane described in a separate paper. The electromagnet can lift 50kg loads. The switchboard includes a transformer that powers the electromagnet. It also contains relays, contactors and inverters that allow the operation of the crane three-phase motors using a single-phase power supply. Crane slewing is limited to an 180º angl...
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