抄録
This paper presents the "virtual eddy current method" for coil shape optimization. In this method, optimum coil shapes are determined as paths of eddy currents induced in a virtual thin metallic plate. To get the eddy currents, which produce target fields within a specific region, the distribution of the magnetic flux density impressed on the plate is optimized. The general formulation of this method based on the FEM by current vector potential method (T-method) is shown. The validity of the virtual eddy current method is demonstrated by shape optimizing of a z field gradient coil of the MRI with the formulation on the four node isoparametric line element of the FEM.
