Cogging torque estimation of IPMSMs with concentrated winding based on spatial distribution in inductance

This paper proposes a new cogging torque estimation of IPMSMs with concentrated winding, which is based on spatial distribution of inductance estimation. In general, IPMSMs with concentrated winding is known to realize high efficient drives by shortening stator windings in exchange for large torque ripple development. To solve this problem, this paper proposes the cogging torque estimation technique based on spatial harmonics components of the stator inductances. The proposed method in this paper based on the principle that the cogging torque in IPMSMs have the significant relationship to the spatial distribution in stator inductances, so that this paper also proposes the inductance identification including spatial distribution. Finally, this paper shows some feasible results for numerical simulation incorporating an IPMSM behavior model obtained by FEM analyses.