Analysis of induced current density in prolate spheroidal human model under UHV power line

摘要

Recently the attention of biological hazards from exposure to fields has been paid to low frequency electromagnetic environment. In this paper, effects of the magnetic field components on the induced current density in a homogeneous prolate spheroid human model has been discussed. First, effect of phase differences of the magnetic fields and magnitude of 60Hz horizontal and vertical magnetic fields on induced current density has been various. Second, the distributions of the induced current density in the model have been visualized, and it was found that on the special conditions there were points where no current flows in the model. These points were on a straight line only for the magnetic fields with the same phase. Third, the induced current density at points in the prolate spheroid model exposed to magnetic fields under the transmission line had different characteristics depending on the distance from the tower center line. At some distances the total current density relied only on horizontal magnetic field and at others the total current density relied only on vertical magnetic field because of phase differences of magnetic fields. These characteristics also depended on a calculating point in the model owing to vectorial angles of induced current. These results showed that the phase differences of the magnetic fields had an effect on the induced current density in the model exposed to the ordinary magnetic environment.