پديد آورنده :
حاجيان، مسعود
عنوان :
بهينه سازي بازده محركه القايي سه فاز بر پايه كنترل غير خطي مستقيم گشتاور با قابليت استفاده در سرعتهاي پايين و با حذف نمونه بردار سرعت
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده برق و كامپيوتر
صفحه شمار :
نه،128ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
جعفر سلطاني، سعيد حسين نيا
استاد مشاور :
غلامرضا عرب
توصيفگر ها :
بهينه سازي بازده , روش گام به گام به عقب
تاريخ نمايه سازي :
18/11/89
استاد داور :
شاهرخ فرهنگي، ابوالفضل واحدي، محمد مدني
دانشكده :
مهندسي برق و كامپيوتر
كد ايرانداك :
ID349 دكتري
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتال
چكيده انگليسي :
128 Efficiency Optimization of Sensorless Three Phase Induction Motor Drive Based on Nonlinear Direct Torque Control and Applicable to Low Speed Regions Masood Hajian m hajian@ec iut ac ir June 2010 Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Jafar Soltani Supervisor j1234sm@cc iut ac ir Saeed Hoseinia Supervisor hoseinia@cc iut ac ir Gholamreza Arab Markadeh Advisor S Mahmood Moddareshashemi Department Program Coordinator Department of Electrical and Computer Engineering Isfahan University of technology Department of Electrical and Computer Engineering Isfahan University of technology Department of Engineering University of Shahrekord Abstract In this project sensorless direct torque control DTC of three phase induction motor IM drives based on sliding mode SM and integrator backstepping nonlinear control techniques is presented The IM drive is supplied with a two level space vector modulation SVM voltage source inverter Stator and rotor flux vectors are estimated using two SM flux observers in which simultaneous determination of rotor flux rotor speed and rotor time constant is achieved in one of them Both proposed controllers are developed in the stationary frame and ensure a high performance tracking control A novel model based MB loss minimization approach and an improved search based SB efficiency optimization method are also introduced which are combined with the motor drive controllers Sensorless IM drive capable of very low speed operation is also presented In this region stator flux vector is determined using a pure integrator developed in the stationary reference frame An improved method is introduced for offset and drift components compensation Moreover feasible solutions are proposed for on line stator and rotor resistances identification to ensure further improvement of drive performance at very low speeds The proposed control idea is experimentally implemented using a CPLD board synchronized with a personal computer Simulation and experimental results are presented to verify the effectiveness of the methods proposed Key Words Induction Motor Direct Torque Control Integrator Backstepping Sliding Mode Efficiency Optimization Stator and Rotor Resistances
استاد راهنما :
جعفر سلطاني، سعيد حسين نيا
استاد مشاور :
غلامرضا عرب
استاد داور :
شاهرخ فرهنگي، ابوالفضل واحدي، محمد مدني
