Abstract:Aiming at offshore wind energy development and utilization, a novel permanent magnet wind power generator was proposed and designed. The proposed electric machine consisted of multiple modular stator permanent magnet generators (MSPMGs) with uniform spatial phase shifting and each MSPMG was singlephase doubly salient electric machine with modular stator containing permanent magnet and toothed winding structures, which significantly reduced the magnetic coupling and mutual inductance between modules. By analyzing the electromagnetic torque and power characteristics of MSPMG, the optimal power control strategy of MSPMG was deduced based on variational principle and the optimal armature current control was realized by using singlephase Hbridge controllable rectifier. The results of finite element analysis indicated that the coupling coefficient between different modules of the MSPMG was very small due to the isolated magnetic circuits, so the proposed machine had strong operating capability of fault tolerance. Simulation results verified the correctness and effectiveness of the designed electric machine and the corresponding control strategy.