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Direct Torque Control of Brushless Doubly-Fed Induction Machines Using Fuzzy Logic

Fattahi, Javad | 2011

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 42125 (58)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Khayyat, Amir
  7. Abstract:
  8. This thesis contributes two separate predictive direct torque control methods; based on hysteresis and fuzzy logic for Brushless Doubly Fed Induction Machine (BDFM). Initially Chapter 1, focuses on BDFM history and concept of this machine and after that a short review about the development of BDFM and the Field Oriented Control will be studied. Chapter 2 introduces the d-q-0 state transformation matrix, dynamic equation of BDFM and represents its steady-state equivalent. Furthermore, in this chapter the bond graph model of BDFM is studied and via distinguishing all energy ports the bond graph model of this motor is introduced and validated, finally the result of this model is compared with the steady state equivalent circuit. Chapter 3 devotes different Direct Torque Control (DTC) strategies and specifically, a predictive DTC in α-β coordination which classifies a look up table, finally in this chapter, simulation results for DTC control of BDFM are presented. Finally chapter 4 covers a description of some definitions in Fuzzy Control, and a new method for improving the performance of Direct Torque Control of Brushless Doubly Fed Induction Machine will be introduced using twelve sector expanded rule bases as a Fuzzy Logic Direct Torque Controller (FLDTC). At the end of all these four chapters simulation results are presented and evaluated.


  9. Keywords:
  10. Direct Torque Control ; Graphs ; Fuzzy Logic ; Brushless Doubly Fed Induction Machine ; Bond Graph

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