THE ANALYSIS PECULIARITIES OF HIGH FREQUENCY CURRENT DISTRIBUTION IN AXIS SYMMETRIC ELECTRODES FOR ELECTROSURGICAL INSTRUMENTS
In the environment of mathematical package Matlab, using finite difference method, the analysis of the electric field intensity distribution and the high frequency current density in the electrodes of electrosurgical instruments was performed. Two-dimensional elliptic problem, with boundary conditions of the first and second kind, which models the skin effect thickness in conductors with axis- symmetric-cross-section was solved. The mathematical model clearly shows that almost no high-frequency current flows inside the electrode. The mathematical model can be used for conductors with different conductivity in a wide frequency range. The increase of the electrode cross section area, which conducts current, is possible by increasing the overall length of the electrode outer perimeter by changing its cross section shape thanks to the electrode parts be removed