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Closed-loop controller for eliminating the contact bounce in DC core contactors
García Espinosa, Antonio; Riba Ruiz, Jordi-Roger; Cusido Roura, Jordi; Ortega Redondo, Juan Antonio; Romeral Martínez, José Luis
Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica; Universitat Politècnica de Catalunya. Departament d'Enginyeria Elèctrica; Universitat Politècnica de Catalunya. MCIA - Centre MCIA Innovation Electronics
The undesirable phenomenon of the contact bounce causes severe erosion of the contacts and, as a consequence, their electrical life and reliability are greatly reduced. On the other hand, the bounce of the armature can provoke re-opening of the contacts, even when they have already been closed. This paper deals with the elimination of the bounce in both contacts and armature of a commercial dc core contactor. This is achieved by means of a current closed-loop controller, which only uses as input the current and voltage of the contactor’s magnetizing coil. The logic control has been implemented in a low cost microcontroller. Moreover, the board control can be fed by either dc or ac, and either in 50 Hz or 60 Hz so as to extend its applicability. A set of data is obtained from the measurement of the position and velocity of the movable parts for different operating voltages, and the dynamic behavior of the contactor is discussed.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria electrònica::Circuits electrònics
Electric circuits
Electric contactors
Fuzzy systems
Automatic control
Microcontrollers
Circuits elèctrics -- Control automàtic
Contactors elèctrics
Microcontroladors
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/publishedVersion
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