Analysis of permanent magnet linear synchronous motor for servo system using 3-D equivalent magnetic circuit network method

The problem in improving the positioning precision of a permanent magnet linear synchronous motor (PMLSM) is the detent force caused by the interaction of the magnets with the teeth of the stator. This paper presents 3-dimensional equivalent magnetic circuit network method (3-D EMCN) for the analysis of PMLSM. 3-D EMCN is a numerical analysis method which supplements the magnetic equivalent circuit by using a numerical technique. We analyzed the fields and forces of PMLSM in the case of a skewed magnet and axially segmented magnet construction which are 3-D problems. The results are compared with the experimental ones and show a reasonable agreement