Introduction of Double-Stator Synchronous Reluctance Motor and Modeling

Abstract

This paper introduces a double-stator synchronous reluctance motor (DS-SynRM) as a solution for reducing the torque ripple of single-stator synchronous reluctance motors (SS-SynRMs). To speed up the design and performance parameter prediction of the DS-SynRM, a magnetic equivalent circuit (MEC) is proposed. To ensure accurate performance prediction of the motor designs using the MEC, a saturation factor is considered in the proposed MEC based on finite element analysis (FEA) results. The accuracy of the developed MEC is validated using 2-D FEA results. A design algorithm based on the proposed MEC in the dq reference frame is introduced. The study investigates four different DS-SynRM designs with similar volume based on the proposed design algorithm. The performance parameters of the proposed designs are compared with a conventional SS-SynRM and two previously introduced single-stator SynRMs constructed by expensive materials (i.e., dual phase materials). The simulation results demonstrate the capability of the DS-SynRM in production of a similar torque compared to the SS-SynRM. It is shown that the proper adjustment of the second stator location produces a lower torque ripple using the DS-SynRM topology.

Keywords

• Double-stator SynRM
• high-power density
• high-torque density
• magnetic equivalent circuit
• synchronous-reluctance motor