Document details

Electromagnet and switchboard for slewing crane

Author(s): Pedrosa, Delfim cv logo 1 ; Teixeira, Patrício cv logo 2 ; Esteves, João Sena cv logo 3

Date: 2006

Persistent ID: http://hdl.handle.net/1822/6076

Origin: RepositóriUM - Universidade do Minho

Subject(s): Electromagnet; Switchboard; Contactor; Inverter; 8051 microcontroller


Description
This 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 angle, for safety reasons. Pressing an emergency button switches off all command circuits. An 8051 microcontroller-based system determines the vertical position of the electromagnet, which cannot be switched off while being on a high position, not even if the emergency button is pressed.
Document Type Conference Object
Language English
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Fundação para a Ciência e a Tecnologia Universidade do Minho   Governo Português Ministério da Educação e Ciência Programa Operacional da Sociedade do Conhecimento EU