Parameter and performance prediction of synchronous machines using finite-elements

This paper gives a brief overview of common practice in the field. It is confined to computations using two-dimensional solvers, which assume that the machines are infinitely long and which analyse performance on a per-metre basis. In practice this restricts us to machines whose active length is large compared to their air gap length, simple correction factors being applied to allow for the ends. Many synchronous machines use permanent magnets for their energisation. It is important to know whether the proposed operating range for the machine leads it into a region where the magnets suffer permanent demagnetisation. The effect of temperature on this transition is important, too. The paper concentrates on magnetic and electromagnetic fields