New output power estimation method for cantilever-based piezoelectric energy harvesters

In this report, we describe a new estimation method of output power for cantilever-based piezoelectric energy harvesters (CPEHs). To practically apply the energy harvester as an electronic component, on the basis of the vibration mode function, a design equation taking into account not only the outp...

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Bibliographic Details
Published inJapanese Journal of Applied Physics Vol. 53; no. 7S; pp. 7 - 1-07KE04-4
Main Authors Hara, Motoaki, Van Minh, Le, Oguchi, Hiroyuki, Kuwano, Hiroki
Format Journal Article
LanguageEnglish
Published The Japan Society of Applied Physics 01.07.2014
Subjects
Chip formation
Chips
Energy use
Harvesters
Mathematical analysis
Piezoelectricity
Resonant frequencies
Vibration
Vibration mode
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Summary:In this report, we describe a new estimation method of output power for cantilever-based piezoelectric energy harvesters (CPEHs). To practically apply the energy harvester as an electronic component, on the basis of the vibration mode function, a design equation taking into account not only the output power but also the size and vibration conditions was newly proposed. Using the equation, an energy harvester was designed and fabricated to drive the communication chip based on IEEE 802.15.4. As a result, we succeeded in developing the energy harvester that had the output power of 730 nW at the resonant frequency of 1.5 kHz with the vibration acceleration of 9.8 m/s2. The size of the harvester was smaller than 1 mm3. The output power well agrees with the designed value and is sufficient to drive the communication chip with the intermittent mode.
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ISSN:0021-4922
1347-4065
DOI:10.7567/JJAP.53.07KE04