應用於輕型電動機車之外轉子直流激磁式磁通切換馬達設計

直流激磁式磁通切換馬達的運轉原理與轉子繞組式同步馬達類似，都具有交流的電樞及直流的磁場繞組，但其磁場繞組位於定子，轉子則為凸極結構。由於磁場繞組位於定子，直流激磁式磁通切換馬達可以很容易地做弱磁控制；此外，強健的轉子結構及沒有磁鐵，相當適合於電動車輛相關的應用。本文的主要目的是設計一可以應用於輕型電動機車之外轉子直流激磁式磁通切換馬達，其主要規格是根據政府補助輕型小型電動機車規範制定。馬達設計由分析需求之轉矩轉速曲線開始，利用有限元素分析比較決定轉定子槽極數，並根據外觀尺寸的限制做初步的設計。接著利用靈敏度分析決定合適的參數，利用權重改良外觀以得到最佳設計。除了分析及設計之外亦實做出馬達，以實驗驗證是否與設計相符。

關鍵字

磁通切換馬達；直流激磁式磁通切換馬達；外轉子馬達

並列摘要

The operation principle of the DC excitation flux switching motor is similar to that for the wound rotor synchronous motor. Both of them have the AC armature and DC magnetic windings. However, the DC windings of the DC excitation flux switching motor are placed on the stator, and the rotor is the salient structure. Because the DC windings are on the stator, it is quite easy for the DC excitation flux switching motor to control under the flux-weakening region. In addition, the robust rotor structure without magnets is quite suitable for the application of electric vehicles.This thesis focuses on the design of outer rotor DC excitation flux switching motor for the application of light-weight electric motorcycles. The specifications are determined according to those sponsored by the government for light-weight electric motorcycles. Specific torque-speed curve analysis is done at the beginning of the design approach. The finite element analysis method is used to compare the numbers of slots and the poles, and make the preliminary design according to the size of the exterior appearance. And then use the sensitivity analysis to determine the suitable parameters to improve the design of the exterior appearance of the rotor to obtain the best efficiency and minimum torque ripple. Except the analysis and simulations, prototype of the motor is also made to verify if the simulation is agrees with the design.

並列關鍵字

Flux switching motor ； DC exciting FSM ； outer rotor motor

參考文獻

[1] Z. Q. Zhu and D. Howe, “Electrical machines and drives for electric, hybrid, and fuel cell vehicles,” Proceedings of the IEEE, Vol. 95, No. 4, Apr. 2007, pp. 746-765.

[4] Z. Q. Zhu, and J. T. Chen, “Advanced flux-switching permanent magnet brushless machines,” IEEE Transactions on Magnetics, Vol. 46, No. 6, Jun. 2010, pp. 1447-1453.

[5] W. Hua, M. Cheng, Z. Q. Zhu, and D. Howe, “Analysis and optimization of back EMF waveform of a flux-switching permanent magnet motor,” IEEE Transactions on Energy Conversion, Vol. 23, No. 3, Sep. 2008, pp. 727-733.

[6] Z. Q. Zhu, J. T. Chen, Y. Pang, D. Howe, S. Iwasaki, and R. Deodhar, ”Analysis of a novel multi-tooth flux-switching pm brushless ac machine for high torque direct-drive applications,” IEEE Transactions on Magnetics, Vol. 44, No. 11, Nov. 2008, pp. 4313-4316.

[8] Y. Chen, Z. Q. Zhu, and D. Howe, “Three-dimensional lumped-parameter magnetic circuit analysis of single-phase flux-switching permanent-magnet motor,” IEEE Transactions on Industry Applications, Vol. 44, No. 6, Nov./Dec. 2008, pp. 1701-1710.

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應用於輕型電動機車之外轉子直流激磁式磁通切換馬達設計

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