Design and Analysis of a High-Performance Dual-Stator Spoke-Type Linear Machine Using Phase-Group Concentrated-Coil Windings

Abstract

In this paper, a dual stator, spoke-type linear machine (DSSLM) is proposed with high electromagnetic performance by using the phase-group concentrated-coil (PGCC) windings. The spoke-type configuration allows to use low-cost ferrite magnets for a high magnetic flux density in the air gap. The PGCC windings are capable of obtaining a unity displacement winding factor with short end winding turns. Then the stator-shift method is introduced to increase thrust force and suppress detent force (DF). In addition, the stator additional teeth (SAT) are adapted to improve electromagnetic performance. Finally, by using the finite element method (FEM), the electric performance of the proposed model is analyzed and compared with a basic model. The compare result shows that the proposed DSSLM has advantages of improved voltage, higher thrust force, and lower DF at low operation speed, which is well suit for wave energy conversion. © 2019 IEEE.