MAGNETIC-FIELD ANALYSIS AND LEAKAGE INDUCTANCE CALCULATION IN CURRENTTRANSFORMERS BY MEANS OF 3-D INTEGRAL METHODS

This paper presents 3-D integral approach to the magnetic field and in ductance calculations. A minimization of the kernel norm has been carr ied out for the integral equation governing the field, The software pa ckage TRACAL3, based on the integral methods for field and inductance calculations, has been developed and implemented for personal computer s. The application of the 3-D mathematical models has been made for th e leakage field in a current transformer. The results of calculations were compared with the measured ones. The comparison yields good agree ment. Thus, the worked out software package seems to be one of the CAD tools.