In this study, electromagnetic fields and mutual inductance of two interacting coils were computed analytically, the results compared with numerical solutions measurements. For analytical solution, expressed in spherical coordinates each coil’s frame. The total field due to was calculated using superposition, resulting infinite series involving associated Legendre functions. computations carrie...

In this Paper, complete models of three and six phase self commutated synchronous machine drives are presented, considering the effects of both time and space harmonics. First, the equations for calculation of machine inductances are developed. Next, "thyristor-inverter-electric machine" set is modeled in order to derive all the equations for conduction and commutation states. Finally, the resu...

During voltage transients, the windings of a transformer are coupled by electric and magnetic fields. To calculate transients inside transformer, network model is typically used. The accuracy obtained calculation results depends mainly on this in which lumped into R, L C circuit components. usually represented discs, or groups with corresponding resistances, inductances (self mutual) capacitanc...

The direct torque controlled (DTC) permanent magnet synchronous motor (PMSM) has become attractive because of its simplicity and fast torque response. However, mechanical sensors have caused problems to the system. It is possible to overcome the disadvantage if the initial rotor position is known. For the initial rotor position detection, the structural and magnetic saturation saliencies are fr...

The study introduces the detailed sequence of operations necessary to determine the selfand mutual inductances of power transformers from numerically simulated open-circuit and bucking experiments. Parameters of a welding style transformer are compared to those of a normal step-down transformer of equivalent ratings. The investigation identifies the different patterns of magnetic flux circulati...