本文主要將非稀土(Non-rare earth)磁鐵應用於永磁電動機之設計，並考量後充磁技術與其限制條件，以設計出材料成本低廉且來源穩定之非稀土電機。此處所謂非稀土材料即為鐵氧磁鐵(Ferrite)。
本文首先探討鐵氧磁鐵之材料特性。與稀土磁鐵最大不同在於，鐵氧磁鐵之剩餘磁通密度(Remanence)僅約為稀土磁鐵三分之一，因此必須採用聚磁式轉子以提高電動機性能，其轉子結構相對較複雜，造成組裝過程中困難度提高，故本文採用後充磁技術以減少組裝工序。聚磁式轉子應用後充磁法之磁鐵充磁方向與表面型轉子磁鐵後充磁不同，本文將透過磁鐵材料試驗分析其充磁方向特性，提出後充磁磁鐵模型，以供電動機後充磁性能設計參考。另外，於電動機設計方面，本文根據規格需求，結合磁路模型與後充磁條件，設計出一非稀土內藏型永磁電動機(IPMSM)，再透過模擬與實驗驗證其正確性，並與前充磁做比較與分析。實驗結果符合理論設計，達成非稀土內藏型永磁電動機之後充磁設計與實現之目的。

This thesis is to apply non-rare earth magnet to permanent magnet electric machine design which considers the constraints of post-assembly magnetization. The non-rare earth magnet benefits from cost effective and stable source. The non-rare earth magnet here is Ferrite magnet.
This study first discusses the characteristics of Ferrite magnet. The difference between rare earth and non-rare earth magnet is that the remanence of ferrite magnet is weaker, with only about one third of rare earth. To improve performance, the electric machine is designed with a concentrated flux rotor. However, the complexity of the rotor structure causes difficulties for assembly work. Therefore, post-assembly magnetization proposed in this thesis is to simplify the assembly process. While applying post-assembly magnetization for concentrated flux rotor, magnetizing direction is different from surface permanent magnet rotors. This thesis investigates magnet properties through materials testing and proposes a magnet model for post-assembly magnetization. This can be provided for machine design with post-assembly magnetization. Based on specifications, this thesis combines magnetic circuit model and constraints of post-assembly magnetization to design a Ferrite magnet interior permanent magnet synchronous machine (IPMSM). Simulations and experiments are conducted to verify the design results. The experiment results agree well with the theoretical design. This confirm the design results of IPMSM through the proposed post-assembly magnetization method.

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