五相永磁式同步電動機的優點為故障容忍度高、可分散驅動功率轉換器輸出電流、高可靠度及電機安全性。本論文提出20極, 22槽,內轉型五相永磁式同步電動機的設計。文中以有限元素磁路分析套裝軟體Maxwell-2D進行電勳機之磁路、頓轉轉矩及感應電動勢之分析。
本文永磁式同步電動機定子的外徑為220mm，以定子為20槽，轉子的磁鐵為16極、18極、22極、24極，以及就不同的槽開口比例與磁鐵形狀作分析及比較，並以感應電動勢及其諧波含量為指標，以完成優化的設計。為簡化製作過程，定子採用全開口的槽。在原勳機轉速為600 rpm且加五相等效電阻負載每相為2 Ω下，發電機模式運轉實測得感應電動勢的相電壓基本波峰值為18.40 V，負載端電壓基本波峰值為16.97 V，相電流基本波峰值為8.16 A。由實測結果算得其每相等效電感為0.858 mH，與分析的等效電感0.833 mH相接近。

The advantages of five-phase permanent-magnet synchronous motor (PMSM) are high fault tolerance, dispersible power converter output current, high reliability and electrical safety. This thesis presents the design of a 20- slot 22- pole inner-rotor type PMSG. Finite element software package, Maxwell-2D, is used to analyze the magnetic circuit, the cogging torque as well as the induced electromotive force (EMF).
The proposed 20-slot PMSM has its outer diameter of 220 mm. Analysis is conducted for rotors with 16, 18, 22 and 24 magnetic poles. Various slot-opening ratios and magnet shapes are evaluated and compared to obtain high induced voltage as well as its low harmonic contents. To simplify the production process, full opening of the slots on stator is adopted. Driven at 600 rpm by prime mover and loaded with per-phase resistance of 2 Ω, the measured peak values of EMF and phase voltage are 18.40V and 16.97V, respectively, with the corresponding phase current of 8.16A. The calculated equivalent inductance per phase is 0.858mH, which is close to the analytic result of 0.833mH.

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