PERTURBED H-METHOD WITHOUT THE LAGRANGE MULTIPLIER FOR 3-DIMENSIONAL NONLINEAR MAGNETOSTATIC PROBLEMS

A new formulation of the three-dimensional nonlinear magnetostatic problem is presented. This is a perturbed ir-method without the Lagrange multiplier. To verify this method, the benchmark problem 13 defined in the TEAM Workshop for a nonlinear magnetostatic problem Is solved and the results are compared with the experimental results measured by T. Nakata et al. of Okayama University. Also the practical problem of determining the magnetic field excited by a nonuniform sense current of an MR head is solved.