Eintrag in der Universitätsbibliographie der TU Chemnitz
Volltext zugänglich unter
URN: urn:nbn:de:bsz:ch1-qucosa2-1014963
Hamza, Kholoud
Kanoun, Olfa (Prof. Dr.-Ing.); Trigona, Carlo (Prof. Dr.-Ing.)
A Self-Start-Up AC/DC Boost Converter for Electromagnetic Energy Harvesting in Wireless Sensor Applications
Kurzfassung in englisch
Electromagnetic energy harvesting-powered wireless sensors must operate with ultra-low power, remain functional under low vibrations, and autonomously restart after long energy interruptions. However, most systems are inefficient, need dedicated start-up and complex gate drivers, often need up to 5 V supply, and rarely report restart time after unpowered phases. This thesis proposes two self-powered AC/DC boost converters that start from zero voltage under ultra-low excitation without dedicated start-up circuits. A passive multi-stage voltage multiplier (VM) is integrated in the rectification stage to fast reach the 1.6 V threshold, while the harvester inductance is used as the boost element. The converters operate in start-up and boost modes using two validated topologies: bidirectional and parallel. Both use a three-stage VM; the bidirectional blocks reverse conduction, while the parallel reduces conduction losses. Boost-mode experiments show efficiency and charging speed strongly depend on switching frequency and duty cycle, with optimal performance at 32 kHz. At 0.22g and 29Hz with a 47mF supercapacitor, the bidirectional converter performs best at 78% duty cycle and the parallel at 68.4%. Both start autonomously from 0.65V and reach 1.6V within 20s. In boost mode, the bidirectional topology delivers 4.16V, 1.2mW, 72% efficiency, while the parallel topology reaches 5V, 1.84mW, and 79.2% efficiency, enabling reliable restart and long-term autonomous wireless sensing.
| Universität: | Technische Universität Chemnitz | |
| Institut: | Professur Mess- und Sensortechnik | |
| Fakultät: | Fakultät für Elektrotechnik und Informationstechnik | |
| Dokumentart: | Dissertation | |
| Betreuer: | Kanoun, Olfa (Prof. Dr.-Ing.) | |
| ISBN/ISSN: | 978-3-96100-304-4 (print) ; 978-3-96100-305-1 (online) | |
| DOI: | doi:10.51382/978-3-96100-305-1 | |
| URL/URN: | https://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa2-1014963 | |
| Quelle: | Chemnitz : Universitätsverlag Chemnitz ; Technische Universität Chemnitz, 2026. - 210 S. - Scientific Reports on Measurement and Sensor Technology ; Volume 39 | |
| SWD-Schlagwörter: | Energy Harvesting , Energiespeicherung , Drahtloses Sensorsystem | |
| Freie Schlagwörter (Englisch): | Self-start-up from zero voltage , AC/DC boost converter , electromagnetic energy harvesting | |
| DDC-Sachgruppe: | Technik, Medizin, angewandte Wissenschaften, Ingenieurwissenschaften, Andere Fachrichtungen der Ingenieurwissenschaften | |
| Sprache: | englisch | |
| Tag der mündlichen Prüfung | 16.12.2025 | |
| OA-Lizenz | CC BY 4.0 |
