Evaluations of Swaging Process for Rotor Core of Induction Motors

Induction Motors with Rotor Helical Motion

Virtual Instruments for Detecting Rotor Faults in Induction Motors

Rotating electrical machines play an important role in the world’s industrial life. Hence there is a strong demand on their reliable and safe operation. Their faults and failures can lead to excessive downtimes and generate enormous costs in reduced output, emergency maintenance and lost revenues. Therefore the fault detection methods of electrical machines are of real interest. For the rotor f...

Rotor Flux and Speed Observers for Induction Motors

Abstract— The objective of this paper is to investigate the use of observers in the sensorless control of induction motor drives. First, three recently proposed rotor flux and speed observers for induction motors are analyzed and compared using a unified notation. Unresolved issues for each method are noted. Then, an alternative rotor flux and speed observer architecture is described, which is ...

Analysis of broken rotor bars in large induction motors

Analysis of broken rotor bars in large induction motors Projeto acadêmico sem fins lucrativos desenvolvido no âmbito da iniciativa Acesso Aberto Artigos 407 A new technique to detect broken rotor bars, in large squirrel-cage induction motors is presented. In order to avoid problems in industrial applications, the electromagnetic behavior of induction machines with rotor faults was examined, by ...

Induction Motors Thermal Monitoring by Means of Rotor Resistance Identification

Rotor and stator temperature are of concern in both shortterm machine protection and in longer term condition monitoring for large induction machines. Especially, when operating with overload cycles, it is necessary to monitor rotor bars and stator winding temperatures to make sure that the temperature remains below prescribed limits. The purpose of this paper is to present a thermal monitoring...