Tesis sobre el tema "Harvester interface"
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HAIDAR, MOHAMMAD. "Wind energy harvester interface for sensor nodes". Doctoral thesis, Università degli studi di Genova, 2021. http://hdl.handle.net/11567/1040050.
Texto completoHehn, Thorsten [Verfasser] y Yiannos [Akademischer Betreuer] Manoli. "A CMOS Integrated Interface Circuit for Piezoelectric Energy Harvesters = Eine CMOS-Integrierte Schnittstellenschaltung für Piezoelektrische Energy Harvester". Freiburg : Universität, 2014. http://d-nb.info/1123479119/34.
Texto completoRahimi, Arian. "Design And Implementation Of Low Power Interface Electronics For Vibration-based Electromagnetic Energy Harvesters". Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613820/index.pdf.
Texto completo10 Hz), where most vibrations exits. However, since the generated EM power and voltage is relatively low at low frequencies, high performance interface electronics is required for efficiently transferring the generated power from the harvester to the load to be supplied. The aim of this study is to design low power and efficient interface electronics to convert the low voltage and low power generated signals of the EM energy harvesters to DC to be usable by a real application. The most critical part of such interface electronics is the AC/DC converter, since all the other blocks such as DC/DC converters, power managements units, etc. rely on the rectified voltage generated by this block. Due to this, several state-of-the-art rectifier structures suitable for energy harvesting applications have been studied. Most of the previously proposed rectifiers have low conversion efficiency due to the high voltage drop across the utilized diodes. In this study, two rectifier structures are proposed: one is a new passive rectifier using the Boot Strapping technique for reducing the diode turn-on voltage values
the other structure is a comparator-based ultra low power active rectifier. The proposed structures and some of the previously reported designs have been implemented in X-FAB 0.35 µ
m standard CMOS process. The autonomous energy harvesting systems are then realized by integrating the developed ASICs and the previously proposed EM energy harvester modules developed in our research group, and these systems have been characterized under different electromechanical excitation conditions. In this thesis, five different systems utilizing different circuits and energy harvesting modules have been presented. Among these, the system utilizing the novel Boot Strap Rectifier is implemented within a volume of 21 cm3, and delivers 1.6 V, 80 µ
A (128 µ
W) DC power to a load at a vibration frequency of only 2 Hz and 72 mg peak acceleration. The maximum overall power density of the system operating at 2 Hz is 6.1 µ
W/cm3, which is the highest reported value in the literature at this operation frequency. Also, the operation of a commercially available temperature sensor using the provided power of the energy harvester has been shown. Another system utilizing the comparator-based active rectifier implemented with a volume of 16 cm3, has a dual rail output and is able to drive a 1.46 V, 37 µ
A load with a maximum power density of 6.03 µ
W/cm3, operating at 8 Hz. Furthermore, a signal conditioning system for EM energy harvesting has also been designed and simulated in TSMC 90 nm CMOS process. The proposed ASIC includes a highly efficient AC-DC converter as well as a power processing unit which steps up and regulates the converted DC voltages using an on-chip DC/DC converter and a sub-threshold voltage regulator with an ultra low power management unit. The total power consumption on the totally passive IC is less than 5 µ
W, which makes it suitable for next generation MEMS-based EM energy harvesters. In the frame of this study, high efficiency CMOS rectifier ICs have been designed and tested together with several vibration based EM energy harvester modules. The results show that the best efficiency and power density values have been achieved with the proposed energy harvesting systems, within the low frequency range, to the best of our knowledge. It is also shown that further improvement of the results is possible with the utilization of a more advanced CMOS technology.
Zhu, Zhenhuan. "Investigation of wireless sensor nodes with energy awareness for multichannel signal measurement". Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/investigation-of-wireless-sensor-nodes-with-energy-awareness-for-multichannel-signal-measurement(36d8020b-a6e3-40e3-900e-5e941024990f).html.
Texto completoLechuga, Aranda Jesus Javier. "Interfaces In Hydraulic Pressure Energy Harvesters". Licentiate thesis, Mittuniversitetet, Institutionen för elektronikkonstruktion, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-36106.
Texto completoDen fjärde industriella revolutionen är här vilket innebär en rad utmaningar för att dess utveckling ska bli framgångsrik. En av de största utmaningarna som begränsar utvecklingen av sakernas internet för industriella tillämpningar är strömförsörjningen av trådlösa sensorer då dessa är beroende av batterier med begränsad livslängd. Nya framsteg har emellertid gjorts med tekniker för energiskördning som gör att livslängden för batterierna kan förlängas ochi förlängningen helt ersätta batterierna. Det, i sin tur, möjliggör autonoma sensorer som är självförsörjande på energi som är viktiga komponenter i sakernas internet. Energiskördning är den process som omvandlar energi som finns i omgivningen till elektrisk energi. För att kunna få ut så mycket energi som möjligt så är det avgörande att energiskördarna gör energiomvandlingen så effektivt som möjligt. Det gör att inhämtning av omgivande energi samt gränssnitt och energiomvandling måste förstås och karakteriseras för varje tillämpning. Den här avhandlingen undersöker energiskördning för hydrauliskasystem där tryckfluktuationer i dessa system är energikällan. Syftet med den här studien är att ta fram metoder för uppskattning och karakterisering av de nödvändiga gränssnitten för inhämtning, fokusering, och omvandling av fluktuationer i hydraultryck till elektrisk energi. Sammanfattningsvis visar avhandlingen att metoder för att omvandla tryckfluktuationer i hydraulsystem till elektrisk energi beror på den hydrauliska systemmiljön där det statiska trycket och frekvensen av tryckfluktuationerna är de viktigaste parametrarna. Resultaten kan fungera som utgångspunkt för fortsatt forskning och utveckling av energiskördare för hydrauliska system.
SMART (Smarta system och tjänster för ett effektivt och innovativt samhälle)
Luo, Yuzhong. "Membrane extraction with a sorbent interface". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq38251.pdf.
Texto completoElliott, Alwyn David Thomas. "Power electronic interfaces for piezoelectric energy harvesters". Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/39965.
Texto completoMadill, Daniel Richard. "Modelling and control of a haptic interface, a mechatronics approach". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq38253.pdf.
Texto completoSegal, Alina. "Development of membrane extraction with a sorbent interface for the analysis of environmental and clinical samples". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/NQ65260.pdf.
Texto completoWaterhouse, Julie Frances. "A comparison of 2D and 3D interfaces for editing surfaces reconstructed from contours". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq21540.pdf.
Texto completoLeicht, Joachim [Verfasser] y Yiannos [Akademischer Betreuer] Manoli. "CMOS circuits for electromagnetic vibration energy harvesters : : system modeling, interface design and implementation". Freiburg : Universität, 2019. http://d-nb.info/1193423090/34.
Texto completoWang, Shih Wei y 王釋葦. "Electromagnetic Energy Harvester Interface Design For Wearable Application". Thesis, 2017. http://ndltd.ncl.edu.tw/handle/scsm4y.
Texto completoChuang, Cheng-Chin y 莊政縉. "The Analysis of Piezo Vibration Energy Harvester in Standard Interface and SSHI Interface". Thesis, 2008. http://ndltd.ncl.edu.tw/handle/93369565640661021800.
Texto completo國立臺灣大學
應用力學研究所
96
This thesis studies energy harvesting using piezoelectric elements as energy transducer materials. The ambient vibration energy is transmitted into electrical energy via electromechanical coupling. The harvested energy is further stored by choosing suitable energy harvesting circuits. Here we propose an appropriate physical model accounting for the effect of electronic interfaces on the harvested power output. We analyze the behavior of energy harvesting system for two different electronic circuits. One is the standard interface and the other is the relatively new interface called SSHI (synchronized switch harvesting on inductor). In each circuit, two different magnitudes of electromechanical coupling piezoelectric materials are adopted and studied. In the case of standard interface, it is found that there is only a single peak for optimal power when the coupling effect is in the medium range. On the other hand, there is a pair of optimal power for the case of strongly coupled electromechanical system. Further, it is found that there is always a single peak of power in the case of SSHI system. In this case, the output power drops significantly when the applied frequency deviates from the resonance, in particular, in the case of strongly coupled materials. Therefore, the desired output power for the SSHI system is in the case of mid-range of electromechanical coupling. The effect of diode loss is also studied here via experiment. This effect is significant when the applied frequency is close to the short circuit resonance in both cases of standard and SSHI interfaces. One approach to overcome it is to increase the magnitude of applied acceleration. Finally, the piezoelectric elements in series and parallel forms are proposed to enhance the output power.
Jia-SianChen y 陳家賢. "Piezoelectric Energy Harvester Interface Circuits Using Multi-Switched Inductor Technique". Thesis, 2015. http://ndltd.ncl.edu.tw/handle/41199454740392558017.
Texto completo國立成功大學
電機工程學系
103
In this thesis, TSMC 0.18-μm 1P6M process is applied to implement the design of the energy harvesting interface circuits. A multi-switched inductor technology is proposed to improve the conversion efficiency of the interface circuit power and the harvesting output power. The loss of the traditional switching inductor can be improved by the multi-switching control technologies to lower the maximal inductor current. Moreover, a self-startup is included to fulfill battery-free piezoelectric systems, so the energy harvesting technologies can be applied more widely. The overall energy harvesting interface circuit consists of a negative voltage conversion (NVC) circuit, a switching inductance circuit, a startup circuit, and a multiple switching control logic circuit. The measured results of the proposed piezoelectric interface circuits show that the energy harvester can scavenge power of 100 μW to 1 mW. The loss of the traditional switching inductor can be improved by the multi-switching control technologies. The peak conversion efficiency can be achieved to 86.3%. The overall chip area is 0.672 mm × 0.563 mm.
Mancelos, Nuno Lemos Braamcamp de. "A piezoelectric based energy harvester interface for a CMOS wireless sensor IC". Master's thesis, 2014. http://hdl.handle.net/10362/14716.
Texto completoChuang, Chin-Hsiung y 莊欽雄. "Design of Multiple Piezoelectric Energy Harvesters System with Semi-automation User Interface". Thesis, 2015. http://ndltd.ncl.edu.tw/handle/cau3ec.
Texto completo國立臺灣大學
應用力學研究所
103
The thesis introduces the Laboratory Virtual Instrumentation Engineering Workbench(LabVIEW) programming to integrate both hardware and software into a single interface for experimental facilitation. It also proposes an improvement on the control circuit of parallel-SSHI (Synchronized Switch Harvesting on Inductor) interface. Both techniques are applied to an array of piezoelectric energy harvesters with purposes on either power boosting or broadband improvement. The thesis consists of LabVIEW programming, experiment and data analysis. With LabVIEW programming applied to an array system, a single interface is introduced for controlling both signal output and data acquisition of oscillators and SSHI switch signals. As a result, it is found that compared to the traditional experimental framework with handwritten records, 50% to 75% of time can be saved and the accuracy of measurement on output signals is increased too. The proposed framework is applied to the case of the three piezoelectric oscillators connected to the standard or parallel-SSHI interfaces. When the resonance of each oscillator is almost identical, harvested power is almost three times higher than that of a single oscillator. On the other hand, bandwidth is improved for slightly differences in the resonance of each oscillator. The result shows 70% increase of bandwidth in the array system. In particular, the parallel connection of array system attached to the parallel-SSHI interface exhibits the best performance in both power boosting and wideband improvement. Finally, it is found that the deviations in piezoelectric and dielectric material constants of each oscillator have little effect on power reduction. In contrast, the electromechanical coupling factor and the deviations in resonance of each oscillator have crucial impact on the drop in peak power. The results show that under 2% deviation in resonance, there is 20% power reduction in an array system with high electromechanical coupling. However, harvested power is reduced to 50% for a weak electromechanical coupling system.