Heffel, Eduard (2013)
Ultrasonic Generators for Energy Harvesting Applications: Self-Excitation and Mechanical Frequency Transformation.
Technische Universität Darmstadt
Dissertation, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
The main objective in the field of vibration-based energy harvesting is to convert the kinetic energy from an ambient energy source into an useable electrical form in the most efficient way. The intention is to provide power for low-powered electronic devices, such as intelligent sensors for structural health monitoring, in order to make an external power source or periodic battery replacement redundant and thus lower the costs. Applications of this technology can be found in the automotive and aerospace industry as well as in civil and mechanical engineering. One of the main challenges in the area of vibration-based energy harvesting is to design an energy harvesting device generating a significant amount of electrical power across varying vibration inputs. Due to the design, most energy harvesters are subject to forced excitation and have therefore the drawback that the performance strongly depends on the uncertain excitation parameters. Furthermore, to achieve a high power density of the piezoceramics used for the energy conversion, it is required to generate a high-frequency operation of the piezoceramics from a low-frequency vibration source. Such frequency transformation is, for example, exploited in ultrasonic motors, but has never been examined in the inverse direction for ultrasonic generators. In this thesis, a new concept of piezoelectric generators is studied in detail with respect to its applicability for energy harvesting systems. To this end, electromechanical models of two different ultrasonic motors are derived in order to study their convertibility of the operating direction. Based on the analytical models, the influence of the main parameters on the dynamic behavior as well as the characteristic steady-state operation are determined. Experiments are carried out to validate this concept.
Typ des Eintrags: | Dissertation | ||||
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Erschienen: | 2013 | ||||
Autor(en): | Heffel, Eduard | ||||
Art des Eintrags: | Bibliographie | ||||
Titel: | Ultrasonic Generators for Energy Harvesting Applications: Self-Excitation and Mechanical Frequency Transformation | ||||
Sprache: | Englisch | ||||
Referenten: | Hagedorn, Prof. Peter ; Schweizer, Prof. Bernhard | ||||
Publikationsjahr: | 2013 | ||||
Ort: | Darmstadt | ||||
Verlag: | Studienbereich Mechanik, Technische Universität Darmstadt | ||||
Reihe: | Forschungsberichte des Instituts für Mechanik der Technischen Universität Darmstadt | ||||
Band einer Reihe: | 32 | ||||
Datum der mündlichen Prüfung: | 20 Dezember 2013 | ||||
Zugehörige Links: | |||||
Kurzbeschreibung (Abstract): | The main objective in the field of vibration-based energy harvesting is to convert the kinetic energy from an ambient energy source into an useable electrical form in the most efficient way. The intention is to provide power for low-powered electronic devices, such as intelligent sensors for structural health monitoring, in order to make an external power source or periodic battery replacement redundant and thus lower the costs. Applications of this technology can be found in the automotive and aerospace industry as well as in civil and mechanical engineering. One of the main challenges in the area of vibration-based energy harvesting is to design an energy harvesting device generating a significant amount of electrical power across varying vibration inputs. Due to the design, most energy harvesters are subject to forced excitation and have therefore the drawback that the performance strongly depends on the uncertain excitation parameters. Furthermore, to achieve a high power density of the piezoceramics used for the energy conversion, it is required to generate a high-frequency operation of the piezoceramics from a low-frequency vibration source. Such frequency transformation is, for example, exploited in ultrasonic motors, but has never been examined in the inverse direction for ultrasonic generators. In this thesis, a new concept of piezoelectric generators is studied in detail with respect to its applicability for energy harvesting systems. To this end, electromechanical models of two different ultrasonic motors are derived in order to study their convertibility of the operating direction. Based on the analytical models, the influence of the main parameters on the dynamic behavior as well as the characteristic steady-state operation are determined. Experiments are carried out to validate this concept. |
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Alternatives oder übersetztes Abstract: |
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Freie Schlagworte: | ultrasonic generator, vibration-based energy harvesting, self-excitation, mechanical frequency transformation | ||||
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Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau | ||||
Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Dynamik und Schwingungen Exzellenzinitiative Exzellenzinitiative > Graduiertenschulen Exzellenzinitiative > Graduiertenschulen > Graduate School of Computational Engineering (CE) Zentrale Einrichtungen |
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Hinterlegungsdatum: | 26 Jun 2024 06:32 | ||||
Letzte Änderung: | 26 Jun 2024 06:32 | ||||
PPN: | |||||
Referenten: | Hagedorn, Prof. Peter ; Schweizer, Prof. Bernhard | ||||
Datum der mündlichen Prüfung / Verteidigung / mdl. Prüfung: | 20 Dezember 2013 | ||||
Schlagworte: |
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Verfügbare Versionen dieses Eintrags
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Ultrasonic Generators for Energy Harvesting Applications: Self-Excitation and Mechanical Frequency Transformation. (deposited 09 Mär 2014 20:55)
- Ultrasonic Generators for Energy Harvesting Applications: Self-Excitation and Mechanical Frequency Transformation. (deposited 26 Jun 2024 06:32) [Gegenwärtig angezeigt]
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