Computation of Inductance and Capacitance Matrices

Summary from only given, as follows. Analysis of any electromagnetic system under transient conditions requires a knowledge of parameters such as inductances and capacitances at the relevant frequencies. In most cases due to the high frequencies involved, complex geometry of the system and absence of symmetry, direct calculation of these parameters with an acceptable degree of accuracy is not possible. Furthermore, in systems with close couplings, mutual effects can not be determined from simple calculations. The proposed paper presents a method based on finite element to determine inductance and capacitance matrices of the stator winding of a 3-phase induction motor when the machine is subjected to steep fronted switching surges. The finite element method is used to solve the equations describing the electromagnetic field distribution within the system for magnetic vector potential. Integration over relevant distances is then used to calculate total magnetic flux passing through any given area from which self and mutal inductances are determined. Similarly, electric field analysis and energy considerations are used to determine various capacitance values within the system.