Design and analysis of a novel modular six-phase linear permanent-magnet vernier machine

This paper proposes a novel modular linear primary permanent-magnet vernier (LPPMV) machine. With PMs and windings placed on the primary side, this machine possesses a simple secondary side, suitable for long stroke applications such as urban rail transit. Owing to its appropriate primary structure and the Halbach PM arrays, the proposed LPPMV machine offers higher force density, higher back-EMF and lower harmonic compared to the existing one. Its performance is predicted for verification by using finite-element method.