1,721,008 research outputs found
Il controllo vettoriale negli azionamenti con motore asincrono: coniderazioni teroiche ed esmpi di applicazione
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Stator Current and Motor Efficiency as Indicators for Different Types of Bearing Faults in Induction Motors
No full textThis paper proposes a new approach to use stator current and efficiency of induction motors as indicators of rolling-bearing faults. After a presentation of the state of the art about condition monitoring of vibration and motor current for the diagnostics of bearings, this paper illustrates the experimental results on four different types of bearing defects: crack in the outer race, hole in the outer race, deformation of the seal, and
corrosion. The first and third faults have not been previously considered in the literature, with the latter being analyzed in
other research works, even if obtained in a different way. Another novelty introduced by this paper is the analysis of the decrease in efficiency of the motor with a double purpose: as alarm of incipient faults and as evaluation of the extent of energy waste resulting from the lasting of the fault condition before the breakdown of the machine
Azionamenti elettrici per l'automazione
No full textRassegna di alcuni aspetti relativi all'architettura Sw & HW, ai protocolli di comunicazione e alle prestazioni di azionamenti elettrici in applicazioni per l'automazione industriale
Control of a mechanical simulator for testing electrical drives for robotics and industrial automation
No full textThe paper discusses the experiments conducted on a mechanical simulator for testing electrical actuators for robotics and industrial automation. The simulator design has been realized in order to offer a significant benchmark for evaluating and comparing actuators of different construction types and principles of operation. After a summary on the main features of the simulator with the description of the tests carried out on different drives, a methodology for the identification of the link-electrical actuator system is presented, whose results can be used for the automatic tuning of the speed and position loop controller
Misure di energia/potenza elettrica e gestione automatica dei carichi in ambiente domestico
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