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Wireless Power Transfer System Design using Selected Harmonic for Electric Vehicle Charging

Moradi, Adel | 2017

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  1. Type of Document: Ph.D. Dissertation
  2. Language: Farsi
  3. Document No: 50104 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Tahami, Farzad
  7. Abstract:
  8. Long lasting portable power is an ultimate desire for electronic devices. The limited capacity of the batteries in addition to the heavy weight and extra costs are the main challenges of the batteries for energy storage in large electrical devices like electric vehicles. Wireless Power Transmission (WPT) technology can address these issues by providing online electric power for these portable devices. Furthermore, this technology can supply electric devices especially portable ones by eliminating cables and connectors with more reliability.The current research is focused on optimum design of the wireless power transfer system for electric vehicle charging applications. The optimization of the coils and converter are both considered in the design approaches. Dimensions of the coils, desired efficiency, required maximum power transfer capability by considering the minimum copper weight are the main criteria to design the coils. In the optimum design of the converter, output voltage control capability in load and distance variation of the coils is implemented with considering maximum possible efficiency of the converter.A novel and simple analytical algorithm has been developed to design the coils by considering required efficiency and required power transfer capability. Additionally, a new approach has been implemented to reduce the weight of the coils by increasing the resonant frequency without significant change in switching losses. This approach is realized by resonating the converter in a selected harmonic of the switching frequency. Complete procedure to choose this optimum number of the harmonic order is given too. All of these approaches have been practically verified through precise simulations and experimental implementations
  9. Keywords:
  10. Electric Vehicle Charger ; Resonant Frequencies ; Harmonics ; Resonant Converter ; Wireless power Transfer ; Weight Optimization

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