Rotor Shape Design Method of Non-flux Barriers Synchronous Reluctance Motor

Abstract

Compared with the flux barriers synchronous reluctance motor (FB-SynRM), the non-flux barriers synchronous reluctance motor (NFB-SynRM) has the advantages of higher mechanical strength and smaller d-axis magnetic resistance which makes the parameters of NFB-SynRMs more linear compared with the FB-SynRMs. The rotor shape of the NFB-SynRMs is very critical for the motor performance. An improper rotor shape design may cause large torque ripple and decrease the motor torque density. To solve this problem, a convenient rotor shape design method of NFB-SynRMs is proposed and the rotor profile function is derived. The effectiveness of the proposed method is verified by electromagnetic finite element analysis.