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Prediction and Control of Chaos in Permanent Magnet Synchronous Machines

Rasoolzadeh, Arsalan | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43320 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Tavazoei, Mohammad Saleh
  7. Abstract:
  8. Synchronous machines is one of the most popular machines in industry and in power plants. Because the dynamic of this machine is nonlinear, it can exhibit complex behaviors. In this project we have studied a special case in Permanent Magnet Synchronous Machines. A case in which speed of rotor, frequency, currents amplitude and voltages amplitude change in an irregular manner. This special case is called chaos. Chaos occurs for some specific values of parameters and inputs. In this study in the first step, we have tried to find the chaotic area of parameters of system (Prediction of chaos). Then in the next step, we have designed some controllers which can eliminate chaos in the system. The approaches which are used for chaos prediction, are on the base of Harmonic Balance Method and also Generalized Competitive Mode. In these approaches by testing some conditions for existence of chaos, the parameters which cause chaos in the Permanent Magnet Synchronous Machine will be obtained. This area of parameters in which system is chaotic is called chaotic area briefly. By finding this area, we can choose some accessible parameters of system such that the system is chaotic. For Permanent Magnet Synchronous Machines in generator mode the accessible parameter is input torque. The value of torque can be chosen such that not only the generator be non-chaotic but also it delivers the maximum power which is possible for the non-chaotic generator. The controllers which have been designed for the system are fractional derivative based controller, fractional integrator based controller and fractional integrator-derivative based controller. These controllers have been analyzed and compared with each other. Among these controllers, integrator-derivative based controller has more advantages than two others. Hence this controller is preferred more
  9. Keywords:
  10. Permanent Magnet Synchronous Machine ; Chaos Control ; Chaos Theory

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