臺灣博碩士論文加值系統

直流無刷馬達在現今工業裡扮演著重要的角色，主要是因為據有高效率、高轉速以及高扭力等優點。一般直流馬達運轉時，需要霍爾原件來偵測轉子的位置做換相的機制，但使用霍爾原件除了成本提高之外，也容易受環境溫度所限制。若能夠不使用霍爾原件來做換相的機制，就可以使成本降低，固有許多無感測的方法被提出。
本論文設計一無感測直流無刷馬達驅動器，有別於一般感測反電動勢零交越電路，此驅動器只需要量測非激發端的電壓就可以估測轉子位置做換相的動作。論文最後比較有感測與無感測驅動之差異，發現在某些特定的情況下，無感測驅動是可以取代有感測驅動。

The BLDC motors are play important roles in this industry. It is because that the BLDC motors possess some advantages such as high efficiency, high speed and high torque. In general, the BLDC motors work need hall sensor to detect the rotor position in order to commutate. Nevertheless, use hall sensors not only increase cost but also restricted to surrounding temperature. If the motor commutate without hall sensors, we can cost down. Therefore, many sensorless methods are proposed.
The thesis designs a driver for a sensorless BLDC motor. Differ from general drivers, my driver estimates rotor position according to unexcited phase voltage and then commutate without any Back-EMF detection circuits. In the end of the thesis, I compare the differences with sensor control and sensorless control. In the certain condition, the sensorless control could replace with sensor control.

摘要 i
Abstract ii
誌 謝 iii
目 錄 iv
List of Figures vi
List of tables viii
Chapter 1 Introduction 1
1.1 Research motive 1
1.2 Thesis Organization 1
Chapter 2 Basic Concepts of BLDC Motors 3
2.1 Characteristics of BLDC Motors 3
2.2 Mathematical Modeling of BLDC Motor 4
2.3 Typical Commutation Principle 6
2.4 Speed control analysis 7
2.5 Back-EMF based position estimation method 9
Chapter 3 Sensorless control of a BLDC motor 14
3.1 Back-EMF Waveforms 14
3.2 Procedures of sensorless control 15
3.3 Sensorless Feedback control 17
3.3.1 Synchronous Mode 19
3.3.2 Accelerate Mode 19
3.3.3 Speed Locked Mode 20
Chapter 4 Experiments and comparisons 22
4.1 A brief introduction of MCU 22
4.2 Sensorless BLDC driver circuits 23
4.3 Experiment results 24
Chapter 5 Conclusion 26
Reference 27

[1] K. Y. Cheng and Y. Y. Tzou, “Design of a sensorless Commutation IC for BLDC Motors,” IEEE Transactions on Power Electronics, vol.18, no.6, pp.1365-1375, November 2003.
[2] S. Ogasawara and H. Akagi, “An approach to position sensorless drive for brushless dc motors,” IEEE Tran. Industry Applications, vol. 27, no. 5, pp.928-933, Sep. /Oct. 1991.
[3] H.C. Chen, Y.C. Chang and C.K. Huang “Practical snesorless control for inverter-fed BDCM compressors” IET Electr. Power Appl, Vol. 1, No. 1, January 2007.
[4] Dennis Nolan, Maxime Teissier, and David Swanson, “A Novel Microcontroller-Based Sensorless Brushless DC (BLDC) Motor Drive for automotive Fuel Pumps,” IEEE transactions on industry applications, Vol. 39, NO. 6, November/December 2003
[5] H.C. Chen and C.M. Liaw, “Sensorless control via intelligent commutation tuning for brushless DC motor,” IEE Proc-Electr. Power Appl., Vol. 146, No. 6, November 1999.
[6] D.H. Jung and I.J. Ha, “Low-cost snsorless control of brushless DC motors using frequency-independent phase shifter,” IEEE Transactions on Power Electronics, vol. 15, no.4,pp.744-752, July 2000
[7] J. Shao, D. Nolan, and T. Hopkins, “Improved direct back EMF detection for snesorless brushless DC (BLDC) motor drives” in Proc. IEEE-APEC Conf., 2003, pp.300-305
[8] Y.-S. Lai, F.-S Shyu and Y.-H. Chang, “Novel Sensorless PWM-controlled BLDCM Drives without using Position and Current sensors, Filter and Center-Tap voltage” Industrial Electronics Society, The 29th Annual Conference of the IEEE, vol.3, pp. 2144-2149, Nov. 2-6 2003
[9] 鄭光耀, 無刷直流馬達無感測控制方法之研究與DSP實現技術之發展, 國立交通大學電機與控制工程系, 博士論文, 2003
[10] 程思穎, 直流無刷馬達無感測驅動技術之實現, 國立交通大學電機與控制工程系所, 碩士論文, 2005
[11] 林翰宏, 無刷直流馬達之分析與無感測器驅動之建模, 國立交通大學電機與控制工程系所, 碩士論文, 2003