雙凸極永磁馬達(Doubly Salient Permanent Magnet motor, DSPM)擁有極佳的調速範圍、轉子強健性以及高轉矩密度，近幾年來雙凸極永磁馬達作為航空啟動馬達、風力發電與電動載具動力源的應用受到廣泛的討論，但因為在定子部分置入永久磁鐵提供額外的磁通來源，使得製作上面臨永久磁鐵退磁與磁鐵磁通不易控制等問題。因此，本文提出了新型的定子結構來改善雙凸極永磁馬達的上述問題，並推導可行性三角錐法以及組合式架構方便其尺寸設計及加工。
　　新型的定子設計擁有以下的優勢：(1)短磁路設計，可以提升輸出轉矩與降低轉子的徑向分力，(2)永久磁鐵所提供的外加磁場可以利用繞組進行控制，有效遏制永久磁鐵所造成的頓轉扭矩並且增加馬達操作的安全性，(3)定子設計利用A型環的架構，將永久磁鐵與繞組的磁通路徑分隔，減小激磁相切換時對永久磁鐵去磁的威脅，(4)每相定子矽鋼片之間用具有絕磁與導熱特性的鋁條隔開，不僅可以限制磁通路徑也能將繞組所產生的熱能傳到至馬達外部。
　　由於雙凸極永磁馬達的非線性與雙凸極架構，本文將利用有限元素分析(FEA)討論新型設計下的不同操作特性與磁鐵退磁分析，最後再以實測數據進行驗證。

The double salient permanent magnet (DSPM) motor possesses the characteristics of excellent regulating range, rotor robustness, and substantial torque density. In recent years, the applications of DSPM motor as aviation start motors and power sources of wind power generation and electric vehicles have been widely discussed. However, permanent magnets are implanted in stators to provide additional sources of magnetic flux, which cause difficulties in demagnetization and magnet flux control when implemented. Hence, in this paper, a novel stator design is proposed to improve the above mentioned problems of DSPM motors.
The proposed novel stator design is equipped with the following superiorities: (1) a short magnetic circuit, which can improve the output torque and reduce the radial force component of the rotor; (2) the external magnetic field provided by the permanent magnet can be control by winding, which can effectively curb the cogging torque caused be permanent magnets and increase the safety of motor operation; (3) an A-type ring is designed for the proposed stator to separate the flux paths of the permanent magnets and the windings, which can reduce the threat of demagnetization when switching excitation phases; (4) the aluminum strips that possess the characteristics of magnetic insulation and heat conduction are applied in between each phase of the stator laminations, which cannot only limit magnetic flux paths, but also transmit the heat generated by the windings outside the motor.
Due to the nonlinear and doubly salient structure of DSPM motors, this paper will discuss the different operating characteristics of the new design via finite element analysis (FEA), and finally, the proposed design will be verified with the measured data.

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