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Design and lmplementation of Wireless Electric Vehicle Charger using Multilevel Converters with Misalignment Compensation

Poorfakhraei, Amir Reza | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 49045 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Tahami, Farzad
  7. Abstract:
  8. Wireless power transfer has been found to be a practical replacement for cable power transfer in a wide range of applications. For instance, this technology offers significant solutions for medical and industrial applications as well as electrical home appliances and electric vehicle chargers. All over the world, researchers are investigating and implementing experimental prototypes to simplify power transfer in applications in which the use of cables is impossible, troublesome, or hazardous. There are different issues in each of the mentioned applications which should be solved in order to use wireless power transfer systems more beneficially. These issues include power transfer efficiency, power transfer distance, transferrable power, coils dimensions, misalignment tolerance, magnetic fields in the vicinity of system, and so on. In this thesis, wireless power transfer is used for electric vehicle chargers. Although electric vehicles are getting much more popular every day, a great impediment, the charge capacity of electric vehicles batteries, prevents them to be used in a larger scale, which in turn attracts attention to the use of static and dynamic wireless charging. In addition, we proposes multilevel converters as a new choice for the inverter stage of static wireless charger system in order to solve some of the problems in this appealing application. Moreover, after investigating the theory of wireless power transfer and choosing proper inverter structure, simulation and experimental results of a 6 KW wireless power transfer system with 94٪ efficiency over a 15 cm distance are exhibited. is results proves the benefits of using multilevel converters in both increasing the efficiency and transferred power and decreasing high harmonic varying magnetic field around the coils
  9. Keywords:
  10. Efficiency ; Transferability ; Electrical Transmission ; Cascaded Converter ; Wireless Energy Transmission ; Electrical Vehicle ; Misalignment

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