本研究分別探討切換式磁阻馬達與直流無刷馬達之創新設計，建立馬達電腦輔助設計流程。切換式磁阻馬達研究中提出對正與不對正位置下，氣隙磁導之解析解，可以磁路分析求解對正與不對正位置的下的磁交鏈曲線，再者，提出由磁共能之最大變化率求得最佳電流與繞組匝數之設計方法，結合可行性三角形法，構成切換式磁阻馬達泛用設計流程。本研究亦提出一新型切換式磁阻馬達，其定子是由數個C型鐵芯所組成，使其具有繞線簡便、製作成本低、槽空間大及可模組化等特點，運用所建構之設計流程，設計並實作，針對此馬達之特殊磁路結構，提出一種簡化分析模型可有效地縮短分析時間，使得整個設計流程更有效率，最後以實測電感曲線驗證設計的正確性。
直流無刷馬達之創新設計方面，本研究提出以一外轉子及一內轉子直流無刷馬達配置在同一軸心位置，再結合一行星齒輪，外轉子馬達之轉子連接於行星臂，內轉子馬達連接於太陽齒輪，環齒輪為輸出件，組成同心式永磁馬達。研究中探討雙動力輸入的行星齒輪運動與動力特性，整合直流無刷馬達的設計，建構同心式永磁馬達之設計流程。同心式馬達依內、外轉子馬達之動力輸出方向分為三種驅動模式，第一、起動模式：適當控制內、外轉子馬達轉速可使輸出件維持靜止狀態，隨後調變內、外轉子轉速及可使輸出件運轉，此特性可克服負載慣量及摩擦力，有效地降低馬達的起動電流；第二、高轉矩模式：若兩輸入動力方向相同可獲得高轉矩輸出；第三、高轉速模式：若兩輸入動力方向相反輸出轉矩會降低轉速可提高。本研究實際設計並實作同心式永磁馬達，藉由馬達反電動勢量測，驗證設計流程的正確性。

This dissertation proposes two innovation designs which are composed of a switched reluctance motor and a brushless DC motor. In the switched reluctance motor, this dissertation proposes a novel structure of switched reluctance motor constructed by C-core stators. Unlike the conventional SRM, the winding of the proposed SRM can be wound individually and automatically without complex fixture and expensive winding equipment. A 2-D FEA model which is simplified from 3-D FEA model because of the axial field distribution is presented to shorten the simulation time and to analyze more efficiently. In general, the operating point of SRM is in the saturated region. However, the operating current is hard to determine because there is no index to define it. In this dissertation, a simple method is used to determine the optimum exciting for maximum increment of average torque. This will be useful for SRM designers to decide the rated current and to obtain the maximum motor efficiency.
In the brushless DC motor, a high-torque and adjustable-speed drive with a novel structure is developed. The novel drive consists of two separate brushless DC motors, one internal and the other external, which are arranged coaxially. Combining the motors with a planetary gear train, the functions of continuously variable transmissions can be achieved by controlling the output of the two coaxial motors appropriately. The kinematics model of the planetary gears and the magnetic model of the coaxial motor are given by finite element magnetic analysis. Both computer simulation and experimental results are presented to illustrate the effectiveness of the proposed design method of the novel drive.

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