Design and Analysis of a Permanent-Magnet-Assisted Switched Reluctance Motor

A permanent-magnet-assisted switched reluctance motor (SRM) having small excitationpoles, where phase coils are concentrically wound on the poles and thin permanent magnets areinserted inside the poles, is proposed in this paper. The insertion of permanent magnets into the statorexcitation poles has a significant influence on positive torque improvement leading to a boost inefficiency. Three key design parameters such as the thickness of permanent magnets, space betweentwo adjacent permanent magnets, and the width of stator excitation poles are determined during adesign procedure in terms of the enhancement of positive torque. Step-by-step design modification anda comparison between the proposed permanent-magnet-assisted SRM and no-permanent-magnet SRMhave been conducted by means of static torque comparison along with dynamic performance. The firstprototype from steel laminations up to its physical assembly has been constructed. KCI Citation Count: 0