The Study on current characteristic according to core cutting degree in rectangular core type three-phase induction motor

This paper presents current characteristic according to core cutting degree in rectangular core type three phase induction motors. We analyze each 10deg from one phase to next same phase using 2-D finite element analysis (FEM). According to cutting degree, flux saturation and path of flux change. Since this situation, currents are unbalance and produce harmonic components and they cause decrease of efficiency. Optimal cutting core degree selection supplies stable currents and efficiency improvement. In this paper, loss separation test was executed by IEEE Std. 112-98 Method B.