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1、 AN ABSTRACT OF THE DISSERTATION OF Jifeng Han for the degree of Doctor of Philosophy in Electrical and Computer Engineering presented on October 31, 2003. Title: Novel Power Conditioning Circuits for Piezoelectric Micro Power Generators. Abstract Approved: _ Annette von Jouanne Advanced low power d
2、evices promote the development of micro power generators (MPGs) to replace the batteries to power them. Due to the trend in decreasing integrated circuit (IC) supply voltages, power supply designers are facing more and more serious challenges. The objective of this research is to design a power cond
3、itioning circuit (PCC) for use in conjunction with low voltage microelectromechanical systems (MEMS)-based Palouse Piezoelectric Power (P3) micro heat engine power generation systems. The PCC enables maximum power extraction from a piezoelectric MPG. The proposed PCC includes a rectifier stage and a
4、 regulator stage. The rectifier stage is based on the synchronous rectification technique. The dc-dc regulator is a charge pump-based step-down converter. Interleaved discharge (ID) is proposed to reduce the output voltage ripple significantly, without sacrificing the converter efficiency. The propo
5、sed step-down charge pump is analyzed with state-space averaging. In order to facilitate the PSpice simulation of the lead zirconate titanate (PZT) membrane, a simplified PZT model was developed. Both the rectifier and the charge pump are simulated with PSpice. Simulations show that the interleaved
6、discharge method takes full advantage of the step-down charge pump structure, and provides flexibilities to the design of step-down charge pumps. The designed 200mW 5V/1.2V charge pump has an efficiency of 92.2%, with reduced output ripple. Proof-of-concept demonstration of the proposed PCC includes
7、 a 4-stage completely passive charge pump driving an analog wristwatch, proving proper operation of the entire P3 micro power system. A maximum output power of 18.8W has been extracted from a single piezoelectric MPG, with 92% efficiency in the rectifier stage. Arbitrary waveform generator represent
8、ation (AWGR) of the piezoelectric membrane is also presented. AWGR facilitates ongoing tests and demonstrates the feasibility of cascading many MPGs to extract additional power. Copyright by Jifeng Han October 31, 2003 All Rights Reserved Novel Power Conditioning Circuits for Piezoelectric Micro Pow
9、er Generators by Jifeng Han A DISSERTATION submitted to Oregon State University in partial fulfillment of the requirements for the degree of Doctor of Philosophy Presented October 31, 2003 Commencement June 2004 Doctor of Philosophy dissertation of Jifeng Han presented on October 31, 2003. APPROVED:
10、 _ Major Professor, representing Electrical and Computer Engineering _ Director of School of Electrical Engineering and Computer Science _ Dean of the Graduate School I understand that my dissertation will become one part of the permanent collection of Oregon State University libraries. My signature
11、 below authorizes release of my dissertation to any reader upon request. _ Jifeng Han, Author ACKNOWLEDGEMENTS I would like to express my special gratitude and thanks to my advisor, Dr. Annette von Jouanne, for her consistent guidance and support throughout the years of my doctoral study at Oregon S
12、tate University (OSU). I want to thank her for preparing me extremely well for my future career. I am also very thankful to her for providing with me opportunities to attend such important conferences as IEEE Industry Applications Society (IAS) Annual Meeting, IEEE Power Electronics Specialists Conf
13、erence (PESC), and Applied Power Electronics Conference and Exposition (APEC). I would like to express my sincere appreciation to Dr. Thomas G. Dietterich, Dr. Karti Mayaram, Dr. Huaping Liu, and Dr. Alan K. Wallace for being my committee members and for their valuable guidance during my study. I wa
14、nt to thank Dr. Alan K. Wallace for the energy-systems-related knowledge I have learned from his classes. I would like to thank the Defense Advanced Research Projects Agency (DARPA) for providing financial support for this project. I want to thank Dr. Terri S. Fiez for leading the research team at O
15、SU on the DARPA project, and I want to express my deep appreciation to her and Dr. Karti Mayaram for their valuable advice. I am grateful to Dr. Chenggang Xu and Triet Le for having worked with me as a great team. I would like to express my thanks to Dr. Bob Richards, Dr. Cecilia Richards, Dr. David Bahr, and Jack Skinner at
