由於感應馬達具備低成本與結構簡單之優點，因此廣泛地應用於工業之中，然而因其運轉時產生的滑差與轉子銅損，導致馬達效率受到限制。自起動式永磁馬達轉子不但具有感應馬達之鼠籠繞組結構，且在內部嵌入永久磁鐵，使其擁有同步運轉能力與高效率之特性，適合取代感應馬達以達到節能的訴求。
本研究以感應轉矩與煞車轉矩方程式之推導為基礎，討論各項參數對自起動式永磁馬達暫態與穩態特性之影響，並利用有限元素分析軟體(Ansoft EM)進行模擬驗證。最後針對不同的轉子設計類型進行同步化與負載能力之模擬與比較，並選輸出特性較佳之設計，套入一市售1 HP感應馬達，模擬嵌入永久磁鐵後效率改善程度，以作為自起動式永磁馬達設計之重要參考依據。

Induction motors (IMs) have been wildly applied in the industry because of the low manufacturing cost and the simple structure. However, the existence of slip and rotor copper losses will lower the motor efficiency. The structure of Line Start Permanent Magnet Motors (LSPMMs) is similar to IMs, with the permanent magnets inserted in the rotor. Under the synchronous operation, it can provide higher efficiency and be the attractive alternative to the IMs to save electric energy.

In the thesis, the equations of cage torque and braking torque are derived to realize the influence of the design parameters, such as input voltage and magnet remanence, at the transient and steady state based on finite element analysis (FEA). In addition, synchronization and loading capability of different rotor designs are simulated to compare the characteristics. Finally, the design with the best performance is introduced to a produced 1HP IM and the improved efficiency is calculated by FEA method. Overall, this thesis provides levant benchmark for LSPMMs design.

[1] Balder Electric Company, http://www.baldor.com/
[2] Boyd J. H., “Line Start Permanent Magnet Motor,” U.S. Patent 5952757, Sep. 1999.
[3] Chaudhari B. N., Pillai S. K., and Fernandes B. G., “Energy efficient line start permanent magnet synchronous motor,” IEEE Region 10 International Conference Global Connectivity in Energy, Computer, Communication Control, New Delhi, vol. 2, pp. 379–382, Dec. 1998.
[4] Chu M. T., and Chen M.C., “Rotor Structure of Line-Start Permanent Magnet Synchronous Motor,” U.S. Patent 6844652, Jan. 2005.
[5] Frost & Sullivan, “European Integral Horsepower Motors Markets,” May. 2003.
[6] Gleghorn R. L., and Wagner P. D., “Synchronous Machine Rotor Lamination,” U.S. Patent 4922152, May. 1990.
[7] Honsinger V. B., “Permanent Magnet Machines: Asynchronous Operation,” IEEE Transactions on Power Apparatus and Systems, vol. 99, pp. 1503-1509, Jul. 1980.
[8] Kliman G. B., Preston M. A., and Jones D. W., “Permanent Magnet Line Start Motor Having Magnets Outside the Start Cage,” U.S. Patent 5548172, Aug. 1996.
[9] Knight A. M., and McClay C. I., “The Design of High-Efficiency Line-Start Motors,” IEEE Transactions on Industry Applications, vol. 36, pp. 1555-1562, Nov./Dec. 2000.
[10] Kurihara K., and Rahman M. A., “High-Efficiency Line-Start Interior Permanent-Magnet Synchronous Motors,” IEEE Transactions on Industry Applications, vol. 40, pp. 789-796, May./Jun. 2004.
[11] Libert F., Soulard J., and Engstrom J., “Design of a 4-pole Line Start Permanent Magnet Synchronous Motor,” International Conference on Electrical Machines, Bruges, Belgium, Aug. 2002.
[12] Liu J. C., Wagner P. D., and Keuper J. J., “Permanent Magnet Synchronous Motor Rotor,” U.S. Patent 4358696, Nov. 1982.
[13] Mikulic K., “Rotor Lamination for an AC Permanent Magnet Synchronous Motor,” U.S. Patent 5097166, Mar. 1992.
[14] Miller T. J. E., “Synchronization of Line-Start Permanent Magnet AC Motors,” IEEE Transaction Power Apparatus and Systems, vol. 103, pp. 1822-1828, Jul. 1984.
[15] Miller T. J. E., Popescu M., Cossar C., McGilp M. I., Strappazzon G., Trivillin N., and Santarossa R., “Line-Start Permanent-Magnet Motor Single-Phase Steady-State Performance Analysis,” IEEE Transactions on Industry Applications, vol. 40, pp. 516-525, Mar./Apr. 2004.
[16] Popescu M., Miller T. J. E., McGilp M. I., Kalluf F. J. H., Silva C. A., and Dokonal L., “Effect of Winding Harmonics on the Asynchronous Torque of a Single-Phase Line-Start Permanent-Magnet Motor,” IEEE Transactions on Industry Applications, vol. 42, pp. 1014-1023, Jul./Aug. 2006.
[17] Rahman M. A. and Osheiba A. M., “ Performance of a Large Line-Start Permanent Magnet Synchronous Motor,” IEEE Transcation Energy Conversion, vol. 5, No. 1, pp. 211-217, 1990.
[18] Sano T., Nakayama E. and Sawa K., “ A Study on the Electric and Magnetic Circuit of Single Phase Line Start Permanent Magnet Motor “, IEEE Industrial Electronics Conference, pp. 1510-1515,Nov. 2006.
[19] Steen C. R., “Direct Axis Aiding Permanent Magnets for a Lamination Synchronous Motor Rotor,” U.S. Patent 4139790, Feb. 1979.
[20] Soulard J., Nee H. P., “Study of the Synchronization of Line-Start Permanent Magnet Synchronous Motors,” IEEE Industry Applications
Conference, vol. 1, pp.8-12, Oct.2000.
[21] Stephens C. M., Kliman G. B., Boyd J., “A Line-Start Permanent Magnet Motor with Gentle Starting Behavior,” IEEE Industry Applications Conference , USA, vol. 1, pp. 371-339, Oct. 1998.
[22] 茆尚勳，直驅式跑步機用直流無刷馬達之設計，國立成功大學機械工程學系碩士論文，2002。
[23] 唐任遠，現代永磁電機理論與設計， 機械工業出版社，2005。
[24] 陳秋麟，電機機械基本原理， 東華書局股份有限公司，1995。
[25] 康基宏、曾金祥、蔡文彬，“永磁式感應同步機轉子結構改良(一)”，中華民國專利(新型)，371126。
[26] 康基宏、曾金祥、蔡文彬，“永磁式感應同步機轉子結構改良(二)”，中華民國專利(新型)，362843。
[27] 經濟部能源局，http://www.moeaboe.gov.tw。
[28] 羅應照， “自起動式永磁同步馬達技術概論”， 機械月刊, 第381期, pp. 100-113, 2007。