An Effort to Replace Interior Permanent Magnets Rotors with Assisted Reluctance Rotors

Abstract

The increasing price of rare earth magnets, forces researchers to design permanent magnet machines with a smaller volume of rare earth magnets or ferrites for producing the DC magnetic field in the machine. The aim of this paper is to propose and analyze a PM-less machine with respect to an interior permanent magnet synchronous machine (IPMSM). The latter in the context of this paper is being characterized as the reference machine. This IPMSM is already used in assisted power steering systems in the automotive industry. The proposed topology has the same stator (lamination, cross-section) and a rotor with flux barriers and permanent magnets.