Abstract: Complex magnetic system involving both axial and radical exitation isoften applied to motors of aeronautical and civil use. A "Fictitious Magnetic Monopole-,Single Scalar Potential Model" is used fo offer a 3D finite element solution of the nonlinear and anisotropic magnetic field in such a system. A hybrid motor model is calculated and the calculation results and measured values are in good agreement. By using the conclusion of 3D analysis, the conventional"Field-Circuit"model has been modified to be more precise.

Key words: eletromagnetic field, finite element, fictitious magnetic monopole