en Special Electric Machines Special Electric Machines Research Paper Research Paper <div style="text-align: justify;"><span style="color:#000000;"><span style="font-family:times new roman;"><span style="font-size:14px;">In this research work, an improved two-dimensional semi-analytical subdomain based method for performance computation in IPM machine considering infinite-/finite-magnetic material permeability in pseudo-Cartesian coordinates by using hyperbolic functions has been presented. In the developed technique, all subdomains are divided into periodic or non-periodic regions with homogeneous or non-homogeneous boundary conditions (BCs), respectively. Taking into account the appropriate interfaces conditions in the presented coordinates system, the machine performances including magnetic flux density, cogging/electromagnetic torque, back-EMF, and self-/mutual induction have been calculated for three distinct values of soft-magnetic material relative permeability (viz, 200, 800 and &infin;). The semi-analytical results are compared and confirmed by the FEA results.</span></span></span></div> IPM Machine,Analytical Model,Soft-Magnetic Material Relative Permeability,Pseudo-Cartesian Coordinates,Subdomain-Based Technique, 26 38 http://ijeee.iust.ac.ir/browse.php?a_code=A-10-1682-4&slc_lang=en&sid=1 A. Jabbari a-jabbari@araku.ac.ir 180031947532846008538 180031947532846008538 Yes Mechanical Engineering Department, Arak University, Arak, Iran. F. Dubas fdubas@gmail.com 180031947532846008539 180031947532846008539 No Département ENERGIE, FEMTO-ST, CNRS, Univ. Bourgogne Franche-Comté, F90000 Belfort, France.