ABSTRACT
In Chapter 3, the self-field losses are analyzed taking into account the nonlinear nature of the voltage-current characteristic of the technical superconductors. It is shown that the model of the critical state not only underestimates the heat losses from the transport current but also does not allow one to calculate correctly the energy losses in superconductors with the real V-I characteristics in the currents range from the full penetration current to the critical current. The error depends on the smoothness parameters of the V-I characteristic, the current charging rate and the transverse size of the superconductor. The models, which allow one to estimate the self-field losses with satisfactory accuracy in the closed-form approximation both at the partial and full penetration modes, are proposed.
