本文旨在設計一風力發電用永磁式同步發電機，接線可接成三相及六相結構。本文針對定子內徑作設計，使其在固定的外徑下可以獲得較大的功率輸出。並以弦式氣隙磁通密度為基礎，推導分數槽極比(fractional-slot)電機的磁鐵弧形狀的函數，於往後的電機設計中可以縮小分析的範圍，減少時間的花費。本文的發電機採用有限元素法作磁路分析，其中磁通密度及感應電動勢的分析結果與設計值相符合。
本文已完成扁平型，適合小型垂直型風車使用之24槽20極三相/六相永磁式同步發電機的實體製作。此發電機在額定轉速300 rpm時採六相接線的無載電壓峰值為89.68 V，總諧波失真率為2.94 %；採三相接線的無載電壓峰值為86.17 V，總諧波失真率為2.82 %。在額定功率300 W，轉速為300 rpm時採六相接線的端電壓峰值為84.52 V，總諧波失真率為2.96 %；採三相接線的端電壓峰值為77.96 V，總諧波失真率為2.58 %。當輸出功率300 W時，六相電壓調整率為6.11 %。此外，本發電機頓轉轉矩的分析值約為0.18 N-m。

This thesis is devoted to designing a permanent-magnet synchronous generator for wind power generation. It can be a three-phase or a six-phase machine by changing the winding connection of the machine. This thesis is to design the inner diameter of the stator to improve the power density of this machine, and uses the precondition of the sinusoidal flux density in the air-gap of the machine to derive the function of the shape of the permanent-magnet in the case of the fractional slot machine. This can reduce the number of cases needed to be analyzed to reduce the time for machine design. The magnetic and electrical characteristics are analyzed by finite element analysis software package and the results of flux density and induced voltage are close to the design values.
A three-phase/six-phase permanent-magnet synchronous generators with 24 slots and 20 poles is built. It is flat and compatible with vertical axis wind turbines. At rated speed, the no-load voltage of this machine with six-phase winding is 89.68 V and the total harmonic distortion (THD) is 2.94 %. While with three-phase winding, the no-load voltage of this machine is 86.17 V and the THD is 2.82 %. When output power is 300 W rated and the speed is the same as 300 rpm, the phase voltage of this machine with six-phase winding is 84.52 V and the THD is 2.96 %. While with three-phase winding, the phase voltage is 77.96 V and the THD is 2.58 %. When output power is 300 W, the voltage regulation of six-phase winding is 6.11 %. The analysis value of the cogging torque is 0.18 N-m.

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