Hocheffizientes piezoelektrisches Energy Harvesting System mit neuartiger selbstregelnder 'Direct-SSHI' Interfaceschaltung

Konferenz: MikroSystemTechnik - KONGRESS 2011
10.10.2011 - 12.10.2011 in Darmstadt, Deutschland

Tagungsband: MikroSystemTechnik

Seiten: 4Sprache: EnglischTyp: PDF

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Becker, P.; Hong, W.; Hoffmann, D.; Hymon, E.; Folkmer, B.; Manoli, Y. (HSG-IMIT Institute of Micromachining and Information Technology, Villingen-Schwenningen, Germany)
Manoli, Y. (Fritz Huettinger Chair of Microelectronics, Department of Microsystems Engineering - IMTEK, University of Freiburg, Germany)

This paper presents a new piezoelectric energy harvesting device for optimizing the power transfer from the energy harvester to a storage element. The so called DIRECT SSHI device consists of 2 piezoelectric generator structures realized on one substrate, in combination with a SSHI interface circuitry and a control unit. The first piezoelectric structure acts as main generator. The second piezoelectric structure acts as trigger generator that provides the exact trigger points for the SSHI circuitry. Both structures are realized on the same one sided swinging bimorph and are therefore exposed to the same mechanical excitation. The results of parameter studies for an optimal generator design as well as simulation and first measuring results obtained with a generator testing device are presented and discussed in this paper.