本論文針對磁鐵輔助型同步磁阻馬達(Permanent-Magnet Assisted Synchronous Reluctance Motor, PMa SynRM)，提出分析基礎以比較不同永磁設計對於轉矩、效率等影響，同時透過分離磁阻及永久磁鐵轉矩來探討磁鐵之效益。
本論文之研究主要可分為兩部份: 第一部份以不同磁鐵位置、長度、材料之變因下，透過有限元素分析軟體JMAG分析不同設計的PMa SynRM電磁特性；第二部份則以本論文研究重點之分析方法得到其磁阻、永磁特性，如交直軸電感、永久磁鐵磁交鏈，以其計算轉矩量，在最大磁阻轉矩條件下永磁所能提供轉矩和磁阻轉矩及永磁轉矩所佔總轉矩比例來推論其磁鐵輔助之優劣，本論文以磁鐵輔助型同步磁阻馬達之原型機驗證本研究提出的馬達設計結果，證明本論文中所提出之分析方法可用以評估磁鐵輔助設計之效益。

This thesis presents the design and analysis of Permanent Magnet assisted Synchronous Reluctance Motor (PMa SynRM). In previous studies, magnets are often intuitively embedded in the rotor, then comparison between the original model and PMa SynRM were made. However, a systematic method that can enhance the motor performance by inserting magnet has not been developed. The analysis for the effect of the magnets on motor performance has not been fully investigated, such as the magnet position, thickness and width.
This thesis aims to study the influence of adding magnets in the rotor of PMa SynRM and provides a simple guideline for improving the motor performance with the added magnet. It is difficult to fully analyze the effect of magnet by the equivalent magnetic circuit or theoretical derivation. Therefore, this thesis employs finite element analysis (FEA) along with theoretical calculation, the electrical and mechanical characteristics of the motor can be obtained. The d-q-axis inductances, flux linkage, PM/reluctance torque and efficiency are computed with FEA, via which the effectiveness of adding magnet can be preliminarily validated. The method to add magnets can also be developed. A prototype PMa SynRM was designed and fabricated and tested. The experimental results verified the designed PMa SynRM.

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