ABSTRACT
One of the most important tasks in the area of electric machines and power transformers is the selection of proper thickness of electric iron sheets, depending on their properties, the frequency used, and so on. Both at induction heating as well as at the design stage of busbar connections in high-current systems or as internal leads in power transformers and large synchronous turbogenerators, appears the need to determine eddy-current distribution induced in solid metal plates by high-current leads placed near these plates. The task is often accompanied by a corresponding electromagnetic screening or magnetic shunting. The induced transient phenomena is typical of the problems occurring in coupled electromagnetic thermal fields; a good subject for analysis with the help of computer simulations. In order to reduce power losses in cover plates, nonmagnetic gaps are produced between bushing holes, to easily cut the magnetic flux of bushings.
