The permanent magnet synchronous machine with an external rotor is the most important device for high performance electrical drive systems in particular for hybrid electric vehicles. With such an application, the machine will operate in a wide speed range and on the other hand with very fast changing loads in both motor and generator operational modes. The paper discusses finite element analyse...

Power system overvoltages due to switching, lightning and other disturbances are the main problem for designers of the power transformers. Once some frequencies of the incoming surges match with some of the natural frequencies of transformer winding, the resonance phenomenon is expected in transformer winding. The resonant overvoltages may destroy the insulation between turns and cause to insul...

Rogowski coils are increasingly used for measurement of AC and transient electric currents. Mostly used Rogowski coils now are with circular or rectangular cores. In order to increase the sensitivity of the measurement of Rogowski coil and perform smooth wire winding, this paper studies the effect of increasing the mutual inductance in order to increase the coil sensitivity by presenting the ca...

The multi-winding medium frequency transformer (MMFT) has attracted widespread attention, since its application in power electronic transformers can simplify the system structure and reduce volume weight. However, special working conditions of MMFT due to high voltage density increase difficulty insulation design for MMFT. For this issue, paper presents a comprehensive analysis electric filed c...

The article proposes a proprietary approach to the diagnosis of induction motors allowing increasing reliability electric vehicles. This makes it possible detect damage in form an inter-turn short-circuit at early stage its occurrence. authors describe effective diagnostic method using extraction signal features Enhanced Empirical Wavelet Transform and algorithm based on Ensemble Bagged Trees. ...