Comparison of Flux-Switching and Interior Permanent Magnet Synchronous Generators for Direct-Driven Wind Applications Based on Nelder–Mead Optimal Designing

The permanent magnet flux-switching machine (PMFSM) is one of the most promising machines with magnets inserted into stator. To determine in which applications use PMFSM promising, it essential to compare other types. This study provides a theoretical comparison conventional interior synchronous (IPMSM) gearless generator low-power wind turbine (332 rpm, 51.4 Nm). provide fair comparison, both are optimized using Nelder–Mead algorithm. minimized optimization objectives required power frequency converter, cost active materials, torque ripple and losses averaged over working profile turbine. In order reduce computational time, substituting method applied. Based on results calculations, advantages disadvantages considered were revealed: IPMSM has significantly lower higher efficiency than PMFSM, requires much less rare-earth copper is, therefore, cheaper mass production.