The paper achieves a study on the reactive power consumption in case of a medium sized factory. The factories as others industrial consumers usually have the power factor lower than the neutral one, which in Romania is 0.92; that is why these types of consumers have to pay for reactive power. The reason for the power factor is small (sometimes much...

By Olivian Chiver, Liviu Neamt, Cristian Barz, Eleonora Pop, Zoltan Erdei

 The paper deals with the problem of determining the stator end winding inductance of A.C. machines. It refers to the two-layer windings with shortened pitch, the relative pitch being less than one. The inductance has been determined by numerical analysis based on finite elements method (FEM), the procedure being described in this paper. In or...

By Olivian Chiver, Liviu Neamt, Cristian Barz, Eleonora Pop, Cristinel Costea, Zoltan Erdei

This study, using the theory of electric circuits, shows the right definition of scattering parameters (S-parameters) for any two-port electric circuit and the practical way to use these parameters in streamline the processes of information transmission and propagation, and the transfer of the active power from the electric quadrupole input (output...

By Erdei Zoltan, Mihai Iordache, Dragoș Niculae, Alexandru Grib