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Hybrid Switching of Harvesting Energy Systems Based on Peizoelectric Material

Tahmasbi, Mohammad | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46416 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Alasty, Aria; Salarieh, Hasan
  7. Abstract:
  8. For many low-powered portable and wireless electronic applications the finite energy density of chemical batteries places limits on their functional lifetime. Through the use of energy harvesting techniques, ambient vibration energy can be captured and converted into usable electricity in order to create self-powering systems which are not limited by finite battery energy. Typical energy harvesting systems are composed of two components, a transducer that converts the mechanical vibrations into electrical energy and a power converter that efficiently delivers the harvested energy to the electronic load. The practical design of energy harvesting systems must include both components and consider how coupling between the two affects overall system performance. In order to effectively design an energy harvesting system for a specific application, a model is needed that accurately characterizes the energy harvesting process.
    This work focuses on the development characterization of a system-level model for a vibration energy harvesting system. The system considered in this work is comprised of a piezoelectric composite beam transducer and a pulsed resonant converter (PRC). In addition to capturing the general electromechanical behavior, the system modeling developed in this work also considers the effects of non-ideal operation of the transducer and power converter.
    In this work, lumped element modeling techniques are used to model the behavior of the piezoelectric transducer. A full lumped element model (LEM) of the transducer used and the finite losses in the PRC are included in model. The effects of modeling losses in the power converter are also demonstrated
  9. Keywords:
  10. Microelectromechanical Systems (MEMS) ; Piezoelectric ; Electrical Transmission ; Energy Harvesting ; Switching

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