本文提出一雙電動機驅動系統，以提高控速範圍及運轉效率。文中提出兩種新穎的方法以進行兩部永磁同步電動機的驅動控制。方法一利用雙電動機最佳化效率達成轉矩分配，驅動系統在低速時具有高轉矩輸出，達成最佳化效率雙電動機驅動。方法二利用交錯式切換方法對直流鏈電壓進行升壓控制，當驅動系統在高速時，第一部電動機維持在靜止狀態，其定子繞組當作電感，達成提升直流鏈電壓供第二部電動機使用，以提高第二部電動機的控速範圍。
本文使用德州儀器公司TMS320F2808數位信號處理器作為控制核心，以實現雙電動機驅動系統。最後以實測結果說明本文所提方法的正確性及可行性。

The thesis presents the implementation of a novel dual-motor drive system with to extended adjustable speed range and improved efficiency. Two mothods are used to control dual permanent-magnet synchronous motors. Method-1 uses the optimal efficiency algorithm to achieve the torque distribution. When the motors are operated at a low speed range, the high torque outputs can be obtained. Method-2 uses interleaving switching method to boost the dc-bus voltage. When the system is operated at a high speed range, one motor is maintained at standstill and its stator windings are used as inductances to boost dc-bus voltage for another motor to extend its adjustable speed range.
A digital signal processor, TMS320F2808, is used as a control center to control a dual-motor drive system. Experimental results can validate the correctness and feasibility of the proposed methods.

[1]S. G. Wirasingha and A. Emadi, “Classification and review of control strategies for plug-in hybrid electric vehicles,” IEEE Transactions on Vehicular Technology, vol. 60, no. 1, pp. 111-122, Jan. 2011.
[2]A. Emadi, Y. J. Lee, and K. Rajashekara, “Power electronics and motor drives in electric, hybrid electric, and plug-in hybrid electric vehicles,” IEEE Transactions on Industrial Electronics, vol. 55, no. 6, pp. 2237-2245, June 2008.
[3]Y. Xiong, X. Cheng, Z. J. Shen, C. Mi, H. Wu, and V. K. Garg, “Prognostic and warning system for power-electronic modules in electric, hybrid electric, and fuel-cell vehicles,” IEEE Transactions on Industrial Electronics, vol. 55, no. 6, pp. 2268-2276, June 2008.
[4]K. M. Kim, S. H. Park, J. H. Lee, C. H. Jung, and C. Y. Won, “Mode change method of bi-directional DC-DC converter for electric vehicle,” IEEE ICPE-2011, pp. 2687-2693, May/June 2011.
[5]M. J. Yang, H. L. Jhou, B. Y. Ma, and K. K. Shyu, “A cost effective method of electric brake with energy regeneration for electric vehicles,” IEEE Transactions on Industrial Electronics, vol. 56, no. 6, pp. 2203-2212, June 2009.
[6]R. Hall and W. J. Konstanty, “Commutation of DC motor,” IEEE Transactions on Industry Applications Magazine, pp. 56-62, Nov./Dec. 2010.
[7]A. K. Jain and V. T. Ranganathan, “Hybrid LCI/VSI power circuit—a universal high-power converter solution for wound field synchronous motor drives,” IEEE Transactions on Industrial Electronics, vol. 58, no. 9, pp. 4057-4068, Sep. 2011.
[8]S. Onoda and A. Emadi, “PSIM based modeling of automotive power systems conventional electric and hybrid electric vehicles,” IEEE Transactions on Vehicular Technology, vol. 53, no. 2, pp. 390-400, Mar. 2004.
[9]W. L. Soong and N. Ertugrul, “Field-weakening performance of interior permanent magnet motors,” IEEE Transactions on Industry Applications, vol. 38, no. 5, pp. 1251-1258, Sep./Oct. 2002.
[10]E. B. Kosmatopoulos, “Adaptive control design based on adaptive optimization principles,” IEEE Transactions on Automatic Control, vol. 53, no. 11, pp. 2680-2685, Dec. 2008.
[11]J. L. Shi, T. H. Liu, and S. H. Yang, “Nonlinear-controller design for an interior-permanent-magnet synchronous motor including field-weakening operation,” IET Electr. Power Appl., vol. 1, no. 1, pp. 119-126, Jan. 2007.
[12]P. D. Pfister and Y. Perriard, “Slotless permanent-magnet machines general analytical magnetic field calculation,” IEEE Transactions on Magnetics, vol. 47, no. 6, pp. 1739-1752, June 2011.
[13]L. Zhu, S. Z. Jiang, Z. Q. Zhu, and C. C. Chan, “Analytical methods for minimizing cogging torque in permanent-magnet machines,” IEEE Transactions on Magnetics, vol. 45, no. 4, pp. 2023-2031, Apr. 2009.
[14]Z. Azar, Z. Q. Zhu and G. Ombach, “Influence of electric loading and magnetic saturation on cogging torque, back-EMF and torque ripple of PM machines,” IEEE Transactions on Magnetics, vol. 48, no. 10, pp. 2650-2658, Oct. 2012.
[15]M. S. Islam, R. Islam, and T. Sebastian, “Experimental verification of design techniques of permanent-magnet synchronous motors for low-torque-ripple applications,” IEEE Transactions on Industry Applications, vol. 47, no. 1, pp. 88-95, Jan./Feb. 2011.
[16]G. Cvetkovski and L. Petkovska, “Performance improvement of PM synchronous motor by using soft magnetic composite material,” IEEE Transactions on Magnetics, vol. 44, no. 11, pp. 3812-3815, Nov. 2008.
[17]H. Huang and L. Chang, “Electrical two-speed propulsion by motor winding switching and its control strategies for electric vehicles,” IEEE Transactions on Vehicular Technology, vol. 48, no. 2, pp. 607-618, Mar. 1999.
[18]K. Baoquan, L. Chunyan, and C. Shukang, “Flux weakening characteristic analysis of a new permanent-magnet synchronous motor used for electric vehicles,” IEEE Transactions on Plasma Science, vol. 39, no. 1, pp. 511-515, Jan. 2011.
[19]Y. Inoue, S. Morimoto, and M. Sanada, “Comparative study of PMSM drive systems based on current control and direct torque control in flux-weakening control region,” IEEE Transactions on Industry Applications, vol. 48, no. 6, pp. 2382-2389, Nov./Dec. 2012.
[20]M. S. Kwak and S. K. Sul, “Flux weakening control of an open winding machine with isolated dual inverters,” IEEE IAS-2007, pp. 251-255, Sep. 2007.
[21]K. R. Sekhar and S. Srinivas, “Discontinuous decoupled PWMs for reduced current ripple in a dual two-level inverter fed open-end winding induction motor drive,” IEEE Transactions on Power electronics, vol. 28, no. 5, pp. 2493-2502, May 2013.
[22]K. Yamamoto, K. Shinohara, and H. Makishima, “Comparison between flux weakening and PWM inverter with voltage booster for permanent magnet synchronous motor drive,” IEEE PCC-2002, Osaka Japan, pp. 161-166, 2002.
[23]S. M. Sue, J. H. Liaw, and Y. H. Liao, “Design and implementation of a dynamic voltage boosting drive for permanent magnet synchronous motors,” IEEE IPEC-2010, pp. 1398-1402, June 2010.
[24]H. Lee and Y. Choi, “A new actuator system using dual-motors and a planetary gear,” IEEE Transactions on Mechatronics, vol. 17, no. 1, pp. 192-197, Feb. 2012.
[25]Y. H. Yeh, M. F. Hsieh, and D. G. Dorrell, “Different arrangements for dual rotor dual output radial flux motors,” IEEE Transactions on Industry Applications, vol. 48, no. 2, pp. 612-622, Mar./Apr. 2012.
[26]H. Akita, Y. Nakahara, N. Miyake, and T. Oikawa, “A new core” IEEE Transactions on Industry Applications Magazine, pp. 38-43, Nov./Dec. 2005.
[27]A. Consoli, G. Scarcella, G. Scelba, and A. Testa, “Steady state and transient operation of IPMSMs under maximum torque per ampere,” IEEE Transactions on Industry Applications, vol. 46, no. 1, pp. 121-129, Jan./Feb. 2012.
[28]P. C. Krause, Analysis of electric machinery, New York: McGraw-Hill, 1986.
[29]D. Yin, S. Oh, and Y. Hori, “A novel traction control for EV based on maximum transmissible torque estimation,” IEEE Transactions on Industrial Electronics, vol. 56, no. 6, pp. 2086-2094, June 2009.
[30]R. Sehab, B. Barbedtte, and M. Chauvin, “Electric vehicle drive train: sizing and validation using general and particular mission profiles,” IEEE ICMECH-2011, pp. 77-83, Apr. 2011.
[31]S. I. Sakai, H. Sado, and Y. Hori, “Motion control in an electric vehicle with four independently driven in-wheel motors,” IEEE Transactions on Mechatronics, vol. 4, no. 1, pp. 9-16 Mar. 1999.
[32]N. Mutoh and Y. Takahashi, “Front and rear wheel independent drive type electric vehicle (FRID EV) with the outstanding driving performance suitable for next-generation adavanced EVs,” IEEE VPCC-2009, pp. 1064-1070, Sep. 2009.
[33]C. Geng, L. Mostefai, M. Denai, and Y. Hori, “Direct yaw-moment control of an in-wheel-motored electric vehicle based on body slip angle fuzzy observer,” IEEE Transactions on Industrial Electronics, vol. 56, no. 5, pp. 1411-1419, May 2009.
[34]E. Ledezma, B. Mcgrath, A. Munoz, and T. A. Lipo, “Dual AC drive system with a reduced switch count,” IEEE Transactions on Industry Applications, vol. 37, no. 5, pp. 1325-1333, Sep./Oct. 2001.
[35]R. Nalepa and T. O. Kowalska, “Optimum trajectory control of the current vector of a nonsalient-pole PMSM in the field-weakening region,” IEEE Transactions on Industrial Electronics, vol. 59, no. 7, pp. 2867-2876, July 2012.
[36]S. M. Sue and C. T. Pan, “Voltage-constraint-tracking-based field-weakening control of IPM synchronous motor drives,” IEEE Transactions on Industry Applications, vol. 55, no. 1, pp. 340-347, Jan. 2008.
[37]D. C. Hanselman, Brushless Permagnent Magnet Motor Design, Cranston, R.I. : The Writers’ Collective, 2003.
[38]G. Pellegrino, E. Armando, and P. Guglielmi, “An integral battery charger with power factor correction for electric scooter,” IEEE Transactions on Power electronics, vol. 25, no. 3, pp. 751-759, Mar. 2010.
[39]G. T. Chiang and J. I. Itoh, “A high efficiency three-phase AC motor drive converter that utilized the neutral point of a motor,” IEEE PEDS-2009, pp. 783-788, Nov. 2009.
[40]S. H. Park, S. R. Park, J. S. Yu, Y. C. Jung, and C. Y. Won, “Analysis and design of a soft-switching boost converter with an bi-bridge auxiliary resonant circuit,” IEEE Transactions on Power electronics, vol. 25, no. 8, pp. 2142-2149 Aug. 2010.
[41]D. O. Neacsu, W. Bonnice, and E. Holmansky, “On the small-signal modeling of parallel/interleaved buck/boost converters,” IEEE ISIE-2010, pp.2708-2713, Nov.2010.
[42]Texas Instruments, TMS320x280x Digital Signal Precessors, 2002.
[43]Texas Instruments, TMS320x280x DSP Analog to Digital Converter, 2004.
[44]Texas Instruments, TMS320x280x Enhanced Controller Area Network, 2002.