Optimization of a transverse flux machine with claw-pole and flux-concentrating structure

This paper deals with the multi-objective optimization of a transverse flux machine with claw-pole and flux-concentrating structure (CPTFM), which is especially suitable for low-speed and high-torque applications due to its high pole pair number. Compared with conventional radial flux machine, the main flux path in CPTFM is three dimensional and transverse to the rotation of the rotor. For this reason, the time-consuming 3D finite element method is necessary to accurately investigate the performance of CPTFM. In order to optimize the electrometric design of CPTFM and meanwhile to limit the calculation time to an acceptable level, a method mainly based on the Taguchi method and the Nondominated Sorting Genetic Algorithm 2 is developed in this paper. From the comparison between the final optimized design and the original design, it is concluded that all the specified five objectives are improved and the developed method is feasible and effective, which makes a appropriate compromise between the calculation time and optimization results.