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 Induction motors are the most common sources of mechanical power in industry. These machines are very economical, rugged, and low maintenance. The field-oriented control (FOC) and direct torque control (DTC) are the two most common control schemes for modern ac machine drives . Recently big efforts have been made to eliminate the machine shaft sensor and thus to reduce the cost of the drive and increase the reliability. This paper presents the comparisons of control strategies, dynamic performance, effects of the parameter variation, speed estimation techniques and infer rotor speed by the dynamic dq equivalent circuits of induction motor. Furthermore, it discuss both schemes combine the speed estimator .The study is done by simulation using the Matlab/Simulink .
 目 錄 中文摘要...................................................i 英文摘要..................................................ii 致謝.....................................................iii 目錄......................................................iv 圖表目錄.................................................vii 符號說明...................................................x 第一章 緒論................................................1 1.1 前言...............................................1 1.2 研究動機...........................................1 1.3 本文大綱...........................................2 第二章 感應電動機數學模型.................................4 2.1 前言...............................................4 2.2 空間向量（space vector）的定義.................... 5 2.3 感應電動機數學模型.................................8 第三章 磁場導向控制法.....................................10 3.1 前言..............................................10 3.2 磁場導向控制法的類別..............................11 3.3 磁場導向控制控制法的原理.........................13 3.4 磁場導向控制法之架構.............................16 3.5 比例-積分速度控制器設計..........................18 3.6 電流控制型脈波寬度調變原理.......................21 3.7 電壓空間向量調變.................................22 3.8 間接轉子磁場導向控制系統Matlab/Simulink系統模組 建立.............................................23 第四章 直接轉矩控制法.....................................30 4.1 前言.............................................30 4.2 DTC的原理及控制架構..............................30 4.3 DTC控制方塊圖演算法..............................33 4.4 電壓空間向量調變.................................34 4.5 定子磁通空間區間判讀法...........................36 4.6 定子磁通及電磁轉矩磁滯控制器原理.................38 4.7 直接轉矩控制電壓向量切換表.......................40 第五章 感應電動機轉速估測.................................43 5.1前言..............................................43 5.2轉速估測技術探討..................................43 5.3由感應電動機兩軸等效電路圖推導轉子轉速............45 第六章 電腦模擬與比較.....................................49 6.1前言..............................................49 6.2 FOC與DTC之比較...................................49 6.2.1基本控制特性之比較..........................49 6.2.2 FOC及DTC動態特性比較.......................51 6.2.3參數變動靈敏度比較..........................56 6.2.4實現系統複雜度比較..........................62 6.3 FOC與DTC結合速度估測器控制效能比較.............. 62 第七章 結論與建議........................................ 70 7.1結論............................................. 70 7.2建議............................................. 72 參考文獻................................................. 73
 參考文獻[1] Kubota .K .Matsuse ,” Speed sensorless field-oriented control of induction motorwith rotor resistance adaption,” IEEE Transactions on Industry Applications,Vol.30,No52,pp.1219-1244,1994.[2] Bose , B . K, Modern Power Electronics and AC Drives,Prentice Hall,New Jersey,2001.[3] Andrzej M.Trzynadlowski, Control of Induction Motors,Academic Press,2001.[4] Chee-Mun Ong,Dynamic Simulation of Electric Machinery usingMatlab/Simulink,Prentic Hall,1997.[5] 劉昌煥，交流電動機控制~向量控制與直接轉矩控制原理，東華書局，1993。[6] SimPowerSystems For Use With Simulink,User Guide Version 2,The MathWorks,Inc.[7] Benjamin C.Kuo, Automatic Control System , Prentic-Hall ,pp.336, 1991.[8] Makouf,A, Benbouzid, M.E.H, Diallo, D, Bouguechal, N.E, “ A practical schemefor induction motor speed sensorless field-oriented” , IEEE Transactions on EnergyConversion, Vol. 19, pp.230-231,2004.[9] Rodic. M , Jezernik. K, Edelbaher. G., “An analysis of induction motor speedsensorless control using the extended EMF estimation”, IEEE InternationalConference, Vol.1,pp.548-553,2003.[10] Jezernik. K, Edelbaher. G., Rodic. M, “Sensorless control of induction motor basedon estimation of an electromotive force” IEEE International Electric Machinesand Drives Conference, Vol.1.4 , pp. 631 — 637,2003.[11] Betz.R.E,Summer.T, ”Speed Estimation for Induction Machines Using ImaginaryPower”, Industry Applications Conference 38th IAS Annual Meeting.vol.1,pp.117-123 , 2003.[12] Hoang Le-Huy, “Comparison of field-oriented control and direct torque control forinduction motor drives” ,Industry Applications Conference, 1999. Thirty-FourthIAS Annual Meeting. Conference Record of the 1999 IEEE , Vol:2 , 3-7,pp.1245-1252,1999.[13] Yongdong Li; Hu Jie Chen; Jixiong Wu,” Predictive control of torque and flux ofinduction motor with an improved stator flux estimator”,Power ElectronicsSpecialists Conference, 2001. PESC. IEEE 32nd Annual , Vol:3 , 17-21,pp.1464-1469, 2001.[14] Nait Said, M.S. Benbouzid , M.E.H, ” Induction motors direct field orientedcontrol with robust on-line tuning of rotor resistance”, Energy Conversion, IEEETransactions on , Vol: 14 , Issue: 4,pp.1038-1042, Dec. 1999.[15] Elbuluk. M,” Torque ripple minimization in direct torque control of inductionmachines”,Industry Applications Conference, 2003. 38th IAS Annual Meeting.Conference Record of the , Vol: 1 , 12-16,pp.11-16, Oct. 2003.[16] Romeral, L.; Arias, A.; Aldabas, E.; Jayne, M.G.;” Novel direct torque control(DTC) scheme with fuzzy adaptive torque-ripple reduction” Industrial Electronics,IEEE Transactions on , Vol: 50 , Issue: 3,pp.487-492, June 2003.[17] Pengcheng Zhu, Yong Kang, Jian Chen, “Improve direct torque controlperformance of induction motor with duty ratio modulation”,Electric Machinesand Drives Conference, 2003. IEMDC'03. IEEE International , Vol: 2, 1-4,pp.994-998,June 2003 .
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