Engineering Electrodynamics

9 Local Heating of Structural Parts

9.1 Electromagnetic Criteria of Local Excessive Heating

In large electric machines and power transformers, elements of switching stations, and so on, a local excessive heating hazard of constructional parts can appear, due to eddy currents induced by concentrated alternating magnetic field. This is one of the most important factors of reliability of such equipment, and because of their strong interconnection with power systems the consequences of their failure can be often extremely expensive [9.5], [9.13]–[9.15]. This is why it was necessary to develop a simple method, as general as possible, for prediction and examination of possibility of appearance of such overheating hazards. In 1960, the author proposed ...