Computation on transient nonlinear electromagnetic field by an improved space-time finite element method

The paper presents a suitable functional in the form of a convolution of th e magnetic vector potential in the space-time domain for transient non-line ar eddy problem. And then, appropriate element equations have been derived following the usual finite element variational procedure. Furthermore, the element equations are improved. At last, the improved space-time finite ele ment method (STFEM) has been used to compute the transient non-linear elect romagnetic field and performances of a permanent magnet synchronous motor ( PMSM). Numerical illustrations have indicated that the improved space-time finite element method is a valid method to simulate performances of PMSM.