本文旨在設計及製作六相永磁式同步發電機之風力發電系統。六相電機不僅可分散繞組及功率轉換器之容量，亦可降低整流後直流電壓的漣波成分。文中採用並聯型之全控型交流-直流功率轉換器，可將六相同步發電機之變動電壓轉換為固定之直流電壓。本文將建立六相交流-直流功率轉換器數學模式，同時配合同步旋轉座標轉換之電流控制，可降低輸入電流諧波含量、提高功率因數及功率轉換效率。本文系統利用昇/降壓型直流截波器電路進行蓄電池的充/放電，當風速過低時則以定電壓控制進行蓄電池放電，以完成系統能量平衡管理，提高供電穩定度。
本系統以高性能之16位元數位信號處理器（DSP, TMS320LF2407A）為控制核心，目前已完成768 W發電系統之雛形。此外六相交流-直流功率轉換器之轉換效率約為90 %，而發電機輸出電流總諧波失真率約為3.34 %，功率因數達0.95以上，並由實測結果驗證理論之可行性。

This thesis presents the development of wind power system with six-phase permanent-magnet synchronous generators. The proposed system can not only yield high power density of generator and capacity of power converters, but also reduce the voltage ripple at the output of rectifiers. Two three-phase, full-controlled ac-to-dc power converters are used to convert varying voltages from six-phase permanent-magnet synchronous generator to constant dc voltage. The mathematic model of the six-phase switching-mode rectifier is derived. The current control method of six-phase synchronous rotating frame transformation is used to reduce the current harmonics and increase the power factor on input side of generator, and thereby increase the efficiency of the power converter. In addition, a buck/boost chopper is designed to charge and discharge the battery set. Fixed-voltage control method is used to supply load power from battery when speed of wind turbine is low. It thus can accomplish the management of energy balance control and enhance the stability of the whole system.
A low-cost, 16-bit digital signal processor (DSP, TMS320LF2407A) is used to serve as the core control device to implement a 768 W prototype generation system. The experimental data show that the efficiency of the ac-to-dc power converter reaches 90 %.The current harmonics and the power factor on output side of generator are 3.34% and 0.95, respectively. Finally, experiments are given to justify the feasibility of the proposed system.

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