Performance and Cost Comparison of Permanent-Magnet Vernier Machines

This paper presents a quantitative comparison of two direct-drive outer-rotor permanent-magnet vernier (PMV) machines-namely the pole-splitting permanent-magnet vernier machine and vernier hybrid machine with emphasis on their performances and costs. The operating principles of two machines are discussed and their steady-state and transient performances are analyzed using the time-stepping finite element method. The overall weights and costs are also evaluated. The comparison results can be used to assess the validity of the designs of PMV machines.