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—This paper presents and analyzes a method for short-circuit fault detection in a permanent-magnet synchronous motor (PMSM). The study includes steady-state condition and speed transients in motor operation. The stator current is decomposed by empirical mode decomposition (EMD), which generates a set of intrinsic mode functions (IMFs). Quadratic(More)
—This paper presents a new approach for the current acquisition system in motor fault detection applications. This paper includes the study, design, and implementation of a Rogowski-coil current sensor without the integrator circuit that is typically used. The circuit includes an autotuning block able to adjust to different motor speeds. Equalizing the(More)
This paper calculates resonances in transformer windings, using a network of equivalent circuits, magnetically coupled. Inductive and resistive parameters of these circuits are calculated of a new form using vector fitting algorithm, through simulations and impedance measurement. It also includes a physical interpretation of the circuit model used, and the(More)
In this work the voltage distribution in transformers windings is calculated using equivalent circuit with constants elements that are able to model the frequency dependence. FEM is used to estimate resistances and inductances of equivalent circuit in relation with frequency. The behaviour of R and L are approximate to rational functions with Vector Fitting(More)
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