A Feasibility Study on a New Doubly Salient Permanent Magnet Linear Synchronous Machine

Permanent magnet linear synchronous motors (PMLSMs) have been successfully adopted in a wide variety of industry applications due to improved servo-capability and outstanding dynamic characteristics. However, the conventional PMLSMs need a large amount of permanent magnet (PM) material in the stator resulting in significant cost rise. This paper proposes and analyzes a new doubly salient PM linear synchronous machine (DSPMLSM). The proposed configuration consists of consequent pole stator to reduce PM material and modular mover structure to reduce force ripples. Four different models are chosen and compared by two-dimensional finite element analysis (FEA). The analysis reveals that the proposed DSPMLSM uses only a half amount of PMs, while retaining almost the same characteristics as the conventional PMLSMs.