“…As presented in plenty of previous studies, the category of the wind power generators can be various [1], and the permanent magnet synchronous generator (PMSG) with direct mechanical connection to the wind turbine has become popular with superior performance in terms of energy density and efficiency. In previous literatures, this type of machine was studied for various topics, for instance, machine design [2][3], performance evaluation [4][5], loss calculation [6], sensorless control [7], fault characteristics [8][9], dynamic analysis [10], and power electronics with control [11][12][13][14]. Mostly focusing on the machine topology, such as PM flux direction, stator structure, rotor position and coil windings, the generators can be divided into several types, and it is also aware that the magnetization patterns of the PMs are very important design factor to determine the machine characteristics.…”