Development of 3-D Numerical Analysis and Applications

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Various methods for analyzing 3-D magnetic fields are developed, and calculation methods of force and torque are verified by comparing with measurement. The results obtained can be summarized as follows :1.Development of Softwares for Calculating 3-D Magnetic Field(1)The finite element formulations of various methods(A-phi, T-OMEGA) are investigated.(2)The CPU time for edge element is shorter than that for nodal element.(3)The convergence of nonlinear iteration of Newton-Raphson method is improved by introducing the nonlinear programming technique.(4)Method for analyzing eddy current in moving conductor is investigated.(5)3-D time-periodic finite element method is developed.2.Verification of Calculation Methods of Force and TorqueThe force and torque of verification models are analyzed, and the accuracies of calculation methods of force and torque are compared each other.3.Development of Optimal Design MethodOptimal design method which determines the size and shape of electrical machinery is developed by combining the finite element method and the nonlinear programming method.4.Development of 3-D Pre-and Post-ProcessorsThe user friendly 3-D mesh generator and post-processor for finite element analysis are developed.