Eddy-current analysis in an iron sheet considering hysteresis characteristics

The eddy currents in an infinitely long iron sheet caused by an alternating magnetic field are analyzed. At first, it is shown that any static hysteresis loop can be simulated with the help of a digital computer, as far as all the history of is known. Using this computer program, the solution of the eddy current equation under the given initial and boundary conditions becomes possible considering the magnetic hysteresis in a general form. The proposed method can be available even under the voltage excitation. Some results of digital computation are shown : dynamic major loops under both sinusoidal current and sinusoidal voltage excitation, minor loops, and and distributions in an iron sheet under superimposed alternating currents.