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Paper Abstract and Keywords
Presentation 2018-11-02 16:00
[Invited Talk] Piezoelectric Energy Harvesting Systems
Kenji Uchino (Penn State Univ.) US2018-69
Abstract (in Japanese) (See Japanese page) 
(in English) Energy recovery from wasted or unused power has been the topic of discussion for a long time. In recent years, industrial and academic research units have focused on harvesting energy from mechanical vibrations using piezoelectric transducers. These efforts have provided the research guidelines and have brought in light the problems and limitations of implementing the piezoelectric transducer. There are three major phases/steps associated with piezoelectric energy harvesting: (i) mechanical-mechanical energy transfer, including mechanical stability of the piezoelectric transducer under large stresses, and mechanical impedance matching, (ii) mechanical-electrical energy transduction, relating with the electromechanical coupling factor in the composite transducer structure, and (iii) electrical-electrical energy transfer, including electrical impedance matching, such as a DC/DC converter to accumulate the energy into a rechargeable battery. This paper starts from the historical background of piezoelectric energy harvesting, followed by a brief review of recent research trends by pointing out several misconceptions by the researchers. The main parts deal with step-by-step detailed energy flow analysis in energy harvesting systems with typical piezoelectrics, lead zirconate titanates (PZT's), in order to provide comprehensive strategies on how to improve the efficiency of the harvesting system. We also introduce a hybrid energy harvesting system from magnetic field noise using a composite of piezoelectric and magnetostricive materials.
Keyword (in Japanese) (See Japanese page) 
(in English) Piezoelectric energy harvesting / piezoelectric ceramics / PZT / acoustic impedance / electric impedance matching / electromechanical coupling factor / DC/DC converter / magnetoelectric energy harvesting  
Reference Info. IEICE Tech. Rep., vol. 118, no. 277, US2018-69, pp. 31-46, Nov. 2018.
Paper # US2018-69 
Date of Issue 2018-10-26 (US) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee US  
Conference Date 2018-11-02 - 2018-11-02 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
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Paper Information
Registration To US 
Conference Code 2018-11-US 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Piezoelectric Energy Harvesting Systems 
Sub Title (in English)  
Keyword(1) Piezoelectric energy harvesting  
Keyword(2) piezoelectric ceramics  
Keyword(3) PZT  
Keyword(4) acoustic impedance  
Keyword(5) electric impedance matching  
Keyword(6) electromechanical coupling factor  
Keyword(7) DC/DC converter  
Keyword(8) magnetoelectric energy harvesting  
1st Author's Name Kenji Uchino  
1st Author's Affiliation The Penn State University (Penn State Univ.)
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Speaker Author-1 
Date Time 2018-11-02 16:00:00 
Presentation Time 50 minutes 
Registration for US 
Paper # US2018-69 
Volume (vol) vol.118 
Number (no) no.277 
Page pp.31-46 
#Pages 16 
Date of Issue 2018-10-26 (US) 


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