The paper proposes the novel application of Radial Basis Function (RBF) networks to the magnetic modelling of any PM synchronous motor, with special emphasis on internal PM rotors. The advantages are the use of already available measurements, the precision and completeness of the continuous 2D model, which inherently includes all the nonlinearity and cross-coupling effects and that does not use any interpolation algorithm. The paper includes the theory of operation and experimental results, obtained on a laboratory prototype.