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—This paper presents a new signature for detection of rotor faults in induction motors, such as eccentricity and broken rotor bars, that uses the external magnetic field analysis. The proposed method is based on the variations of axial flux density in the presence of these faults. The low frequency part of the magnetic field spectrum is particularly(More)
This paper presents an original non-invasive procedure for the diagnosis of electromagnetic devices, as well as AC electrical rotating machines using two external flux coil sensors that measure the external magnetic field in the machines' vicinity. The diagnosis exploits the signal delivered by the two sensors placed in particular positions. Contrary to(More)
—This paper deals with the finite element analysis and experimental study concerning the influence of the broken bar and rotor dynamic eccentricity faults on the magnetic field outside a squirrel-cage induction motor. The spatial distribution of the magnetic field, the time variation of the magnetic flux density at a point outside the machine and the time(More)
This paper presents the investigation of a self excited induction generator driven by a wind turbine and supplying an RL load. In this work, we focus to analyze a constant voltage-frequency operation mode. However, a pitch angle and an excitation capacitor control is needed to established a suitable operation mode. In order to improve robustness and to(More)
Promising parameter in the analysis and diagnosis of electrical machines is the external magnetic field that can be measured in the vicinity of the machine. This variable provides an image of the internal magnetic state of the machine and it is sensitive to very small imbalances in the machine. Therefore, information about the presence of an anomaly can be(More)
The paper deals with the modeling of a three-phase self-excited induction generator and its steady state analysis using space vector formalism. The behavior of an induction generator working in autonomous mode and which supply an inductive resistive load is presented using a numerical model developed in Matlab-simulink. The startup phenomenon and the(More)
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