Rotor optimization design of brushless doubly fed generator for offshore wind turbine

Brushless doubly fed generator (BDFG) has a broad development prospect in offshore wind power generation. Coupling capability of rotor is the most significant factor which affects the performance of BDFG. In order to research the effect of different structure parameters of magnetic barriers rotor on the coupling capacity, the Taguchi method is used to analyze the effect of salient pole height, magnetic layer numbers and ratio of magnetic layer and non-magnetic layer on coupling capacity of 10 MW BDFG magnetic barrier rotor. In this paper, not only the combination of structure parameters with better coupling capability was obtained, but also the importance of different structure parameters on the coupling capacity of magnetic barrier rotor was analyzed. The simulation results verify the correctness and reliability of rotor optimization.