切換式磁阻馬達是一種結構簡單、堅固、製造成本低廉的電動機。使用直流電源使其驅動電路簡化且可靠，又因為可以控制轉速及轉矩，故速度控制範圍廣，適用於高扭力定功率之場合，所以其應用日漸廣泛。
本文提出一種應用霍爾電流感測器(Current Transducer)及近接感測器(Proximity Sensor)偵測激磁相電流及轉子凸極位置之速度控制器，如此可改善因位置偵測不佳所導致之過換相或欠換相等問題，並且以徳州儀器(TI) TMS 320F240 數位信號處理器(DSP)進行實驗，結果證實本文提出之切換式磁阻電動機應用混合感應器可以有效地降低噪音、進而提升高、低速運轉之順暢度確實可行。

The Switched Reluctance Motor (SRM) inherits a simple and reliable structure with an economical manufacturing cost. The DC power output supplies the unipolar converter to control the pulses sent to SRM. Thus, the velocity and torque are controllable for various velocity commands, and the SRM is gaining more and more applications on high torque requirement field with constant power.
This paper proposes a DSP based hybrid sensor for switched reluctance motor with easy implementation. The current transducer is used to monitor the energized current and proximity sensors for rotor salient. The signals are then fed back to DSP. This design will improve the performance of SRM to operate more smoothly.

Chinese Abstract ....................................................Ⅰ
Abstract......................................................................Ⅱ
Contents....................................................................IV
List of Figures...........................................................VII
List of Tables……………………………………....XI

Chapter 1 Introduction .........................................1
1.1 Motivation..........................................................1
1.2 Literature review..............................................2
1.3 Propose of the thesis.....................................5
1.4 Organization of the thesis..............................6

Chapter 2 Fundamentals and Modeling of a Switched Reluctance Motor....................................................8
2.1 Structure of a switched reluctance motor...8
2.2 Principle of a SRM..........................................11
2.3 Dynamic model of a SRM.............................12
2.3.1 Equivalent circuit of a SRM.........................12
2.3.2 Torque equation...........................................15

Chapter 3 Implementation of DSP-Based SRM drive system......................................................................21
3.1 Introduction......................................................21
3.2 Digital signal processor (DSP) ...................22
3.3 Power MOSFET gate driver...........................30
3.4 Inverter ..............................................................30
3.5 Closed - loop Current transducer circuit....33
3.6 Closed - loop Proximity sensor circuit........34
3.7 Command interface circuit............................39

Chapter 4 Recipe architecture.............................41
4.1 Introduction......................................................42
4.2 Program structure..........................................43
4.2.1 Main recipe....................................................45
4.2.2 Hybrid sensors communication and phase current algorithm.....................................................46
4.2.3 Velocity estimation........................................49
4.2.4 Current controller..........................................53
4.3 Velocity controller and high speed protection..56

Chapter 5 System Integration and Implementation result.........................................................................59
5.1 Introduction......................................................59
5.2 Peak phase current algorithm.....................60
5.3 Various speed control result........................62
5.4 Operate protection..........................................70

Chapter 6 Conclusions .........................................72
6.1 Conclusions.....................................................72
6.2 Future work.......................................................73

Bibliography Reference..........................................75
Appendix A The SRM specification .....................78
Appendix B The main pages of the part datasheets ...............................................................79
Vita ...............................................................82

Bibliography Reference

[1] T. J. E. Miller, Switched reluctance motor and their control, MAGNA PHYSICS PUBLISHING and CLARENDON PRESS OXFORD 1993.
[2] T. J. E. Miller, Brushless Permanent-Magnet and Relutance Motor Drives, CLARENDON PRESS OXFORD 1989.
[3] R. Krishnan, Switched reluctance motor drives : modeling, imulation, analysis, design and applications, C.R.C. Press, 2001.
[4] W. Lu, A. Keyhani, H. Klode, and A.B. Proca, “Modeling and parameter identification of switched reluctance motors from operating data using neural networks,” IEEE IEMDC 03, pp. 1709 -1713, 2003.
[5] E. Mese, and D. A. Torrey, ”An approach for sensorless position estimation for switched reluctance motor using artificial neural networks,” IEEE Trans. Power Electronics, vol.17, pp.66-75, 2002.
[6] M. Ehsani , I. Husain , K.R. Ramani and J.H. Galloway, “Dual-decay converter for switched reluctance motor drives in low-voltage application,” IEEE Transactions on Power Electronics, Vol. 8, PP. 224-230, April 1993.
[7] R. C. Becerra , M. Ehsani and T. J. E. Miller, “Commutation of SR motor,” IEEE Transactions on Power Electronics, Vol. 8, PP.257-263, July 1993.
[8] TMS320C240x DSP Controllers Reference Set Volume 2, Texas Instrument, 1997.
[9] C. Pollock and B.W. Williams, “Power Converter Circuits for Switched Reluctance Motors with the Minimum Number of Switches,” IEE Proceedings on Electric Power Applications, Vol. 137, No. 6, PP. 373-384, Nov. 1990.
[10] http://www.sensorcentral.com/
[11] TMS320C1x/C2x/C2xx/C5x Assembly Language Tools User’s Guide, Texas Instrument, 1995.
[12] I. Husain and M. Ehsani, “Rotor position sensing in switched reluctance motor drives by measuring mutually induced voltage,” IEEE Transactions on Industry Applications, Vol. 30, no. 3, PP. 665-672, 1994.
[13] M. Ehsani and K. R. Ramini, “Direct control strategies based on sensing inductance in switched reluctance motors,” IEEE Transactions on Power Electronics, Vol. 11, no. 1, PP. 74-82, 1996.
[14] Husain and M. Ehsani, “Torque ripple minimization in switched reluctance motor drives by PWM current control,” IEEE Transactions on Power Electronics, Vol. 11, PP. 85-88, Jan. 1996.
[15] M. Moallem, C. M. Ong and L. E. Unnewehr, “Effect of rotor profiles on the torque of a switched reluctance motor,” IEEE Industry Applications Society Annual Meeting, PP.247-253, 1990.
[16] R. M. Davis, “Variable reluctance rotor structures-their influence on torque production,” IEEE Transactions on Industrial Electronics, Vol. 39, no. 2, PP. 168-174, 1992.
[17] C. Pollock and B.W. Williams, “A unipolar converter for a switched reluctance motor,” IEEE Transactions on Industry Applications, Vol. 26, PP. 222-228, March-April 1990.
[18] Mike Barnes and Charles Pollock, “Power electronic converters for switched reluctance drives,” IEEE Transactions on Power Electronics, Vol. 13 , No. 6, PP. 1100-1111, 1998.
[19] A. M. Heva, V. Blasko and T. A. Lipo, “A Modified C-Dump Converter for Variable-Reluctance Machines,” IEEE Transactions on Industry Applications, Vol. 28, No. 5, PP. 1017-1022, Sep./Oct. 1992.
[20] S. K. Panda, X. M. Zhu and P. K. Dash, “Fuzzy gain scheduled PI speed controller for switched reluctance motor drive,” IEEE Proceeding of IECON, Vol. 3, PP. 989-994, 1997.
[21] 吳俊諺，“數位信號處理器為基礎之切換式磁阻電動機驅動系統研製”，碩士論文，國立中山大學，2006。
[22] 汪詠欽，“切換式磁阻馬達驅動與監控系統之研製”，碩士論文，國立中山大學，2005。
[23] 龔應時，陳建武，徐永松，TMSF/C24X DSP控制器原理與應用， 滄海書局，2001。
[24] 黃英哲，董勝源，TMS320C240原理與C語言控制應用實習，長高科技股份有限公司，2002。