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Dissertations / Theses on the topic 'Vehicle power supply'
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Sack, Jean H. (Jean Hope). "The creation of fiberglass tanks and parts for autonomous underwater vehicle constant buoyancy power supply." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/86268.
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Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, June 2013.Cataloged from PDF version of thesis.
The purpose of this thesis was to construct and seal air and containment tanks and other parts for a constant buoyancy power supply for an Autonomous Underwater Vehicle, or AUV. While multiple materials and techniques were considered for construction, the final tanks were made using lost foam molds and epoxy resin. This secondary purpose of this thesis was to provide a detailed description of how to create fiberglass parts, especially custom designs with challenging shapes. Molds were made using a variety of techniques, with best results achieved using a hot wire. Most parts were finished by sanding and using a filler coat, though one of the tanks was left unfilled for transparency. The tanks were machined, and the foam removed, and valve, sensor and rail mounts were made and attached.
by Jean H. Sack.
S.B.
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Cowan, Kelly R. "Technology Planning for Aligning Emerging Business Models and Regulatory Structures: the Case of Electric Vehicle Charging and the Smart Grid." PDXScholar, 2017. https://pdxscholar.library.pdx.edu/open_access_etds/4031.
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Smart grid has been described as the Energy Internet: Where Energy Technology meets Information Technology. The incorporation of such technology into vast existing utility infrastructures offers many advantages, including possibilities for new smart appliances, energy management systems, better integration of renewable energy, value added services, and new business models, both for supply- and demand-side management. Smart grid also replaces aging utility technologies that are becoming increasingly unreliable, as the average ages for many critical components in utility systems now exceed their original design lives. However, while smart grid offers the promise of revolutionizing utility delivery systems, many questions remain about how such systems can be rolled out at the state, regional, and national levels. Many unique regulatory and market structure challenges exist, which makes it critical to pick the right technology for the right situation and to employ it in the right manner. Technology Roadmapping may be a valuable approach for helping to understand factors that could affect smart grid technology and product development, as well as key business, policy and regulatory drivers. As emerging smart grid technologies are developed and the fledgling industry matures, a critical issue will be understanding how the combination of industry drivers impact one another, what barriers exist to achieving the benefits of smart grid technologies, and how to prioritize R&D and acquisition efforts. Since the planning of power grids often relies on regional factors, it will also be important investigate linkages between smart grid deployment and regional planning goals. This can be used to develop strategies for overcoming barriers and achieving the benefits of this promising new technology. This research builds upon existing roadmapping processes by considering an integrated set of factors, including policy issues, which are specifically tuned to the needs of smart grids and have not generally been considered in other types of roadmapping efforts. It will also incorporate expert judgment quantification to prioritize factors, show the pathways for overcoming barriers and achieving benefits, and discussing the most promising strategies for achieving these goals.
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Miller, Matthew Michael. "Modeling, Designing, Building, and Testing a Microtubular Fuel Cell Stack Power Supply System for Micro Air Vehicle (MAVs)." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/76880.
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Research and prototyping of a fuel cell stack system for micro aerial vehicles (MAVs) was conducted by Virginia Tech in collaboration with Luna Innovations, Inc, in an effort to replace the lithium battery technology currently powering these devices. Investigation of planar proton exchange membrane (PEM) and direct methanol (DM) fuel cells has shown that these sources of power are viable alternatives to batteries for electronics, computers, and automobiles. However, recent investigation about the use of microtubular fuel cells (MTFCs) suggests that, due to their geometry and active surface areas, they may be more effective as a power source where size is an issue. This research focuses on hydrogen MTFCs and how their size and construction within a stack affects the power output supplied to a MAV, a small unmanned aircraft used by the military for reconnaissance and other purposes. In order to conduct this research effectively, a prototype of a fuel cell stack was constructed given the best cell characteristics investigated, and the overall power generation system to be implemented within the MAV was modeled using a computer simulation program.
The results from computer modeling indicate that the MTFC stack system and its balance of system components can eliminate the need for any batteries in the MAV while effectively supplying the power necessary for its operation. The results from the model indicate that a hydrogen storage tank, given that it uses sodium borohydride (NaBH4), can fit inside the fuselage volume of the baseline MAV considered. Results from the computer model also indicate that between 30 and 60 MTFCs are needed to power a MAV for a mission time of one hour to ninety minutes, depending on the operating conditions. In addition, the testing conducted on the MTFCs for the stack prototype has shown power densities of 1.0, an improvement of three orders of magnitude compared to the initial MTFCs fabricated for this project. Thanks to the results of MTFC testing paired with computer modeling and prototype fabrication, a MTFC stack system may be possible for implementation within an MAV in the foreseeable future.Master of Science
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Rossouw, Claire Angela. "The accelerated life cycle testing and modelling of Li-ion cells used in electric vehicle applications." Thesis, Nelson Mandela Metropolitan University, 2012. http://hdl.handle.net/10948/d1012709.
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Li-ion batteries have become one of the chosen energy storage devices that are used in applications such as power tools, cellular phones and electric vehicles (EV). With the demand for portable high energy density devices, the rechargeable Li-ion battery has become one of the more viable energy storage systems for large scale commercial EVs because of their higher energy density to weight or volume ratio when compared to other current commercial battery energy storage systems. Various safety procedures for the use of Li-ion batteries in both consumer and EV applications have been developed by the international associations. The test procedures studied in this dissertation demonstrated the importance of determining the true capacity of a cell at various discharge rates. For this, the well known Peukert test was demonstrated. The study also showed that cells with different battery geometries and chemistries would demonstrate different thermal heating during discharge and slightly different Ragone results if different test methods were used as reported in the literature. Accelerated ageing tests were done on different cells at different Depth-of-Discharge (DoD) regions. The different DoD regions were determined according to expected stresses the electrode material in a cell would experience when discharged to specific DoD that follows the discharge voltage profile. Electrochemical Impedance Spectroscopy (EIS) was used to measure various electrochemical changes within these cells. The EIS results showed that certain observed modelled parameters would change similarly to the ageing of the cell as it aged due to the accelerated testing. EIS was also done on cells at different State-of-Charge (SoC) and temperatures. The results showed that EIS can be used as an effective technique to observe changes within a Li-ion cell as the SoC or temperature changed. For automotive vehicles that are powered by a fuel cell or battery, a supercapacitor can be coupled to a battery in order to increase and optimize the energy and power densities of the drive systems. A test procedure in the literature that evaluated the use of capacitors with Pb-acid batteries was applied to Li-ion type cells in order to quantify the increased power due to the use of a supercapacitor with a Li-ion cell. Both a cylindrical LiCoO2 cell and a VRLA Pb-acid cell showed some additional charge acceptance and delivery when connected to the supercapacitors. A LiMn2O4 pouch cell showed significant charge acceptance and delivery when connected to supercapacitors. The amount of additional charge acceptance and delivery of the different combinations could be explained by EIS, in particular, the resistance and capacitance of the cell in comparison to the combination of the cell and supercapacitor. A large capacity LiCoO2 cell showed high charge acceptance and delivery without connection with a supercapacitor. The study proved that EIS can be used to model the changes within cells under the different conditions and using different test procedures.
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Alghamdi, Turki. "Interactions of Connected Electric Vehicles with Modern Power Grids in Smart Cities." Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/42513.
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In a smart city, it is vital to provide a clean and green environment by curbing air pollution and greenhouse gas emissions (GHGs) from transportation. As a recent action from many governments aiming to minimize transportation’s pollution upon the climate, new plans have been announced to ban cars with gas engines throughout the world. Therefore, it is anticipated that the presence of electric vehicles (EVs) will grow very fast globally. Consequently, the necessity to establish electric vehicle supply equipment (EVSE) in the smart city through public charging stations is growing incrementally year by year. However, the EV charging process via EVSE which is primarily connected to the power grid will put high pressure upon the centralized power grid, especially during peak demand periods. Increasing the power production of power grid will increase the environmental impact. Therefore, it is fundamental for the smart city to be equipped with a modern power grid to cope with the traditional power grid’s drawbacks.
In this thesis, we conduct an in-depth analysis of the problem of EVs’ interaction with the modern power grid in a smart city to manage and control EV charging and discharging processes. We also present various approaches and mechanisms toward identifying and investigating these challenges and requirements to manage the power demand. We propose novel solutions, namely Decentralized-EVSE (D-EVSE), for EVs’ charging and discharging processes based on Renewable Energy Sources (RESs) and an energy storage system. We present two algorithms to manage the interaction between EVs and D-EVSE while maximizing EV drivers’ satisfaction in terms of reducing the waiting time for charging or discharging services and minimizing the stress placed on D-EVSE. We propose an optimization model based on Game Theory (GT) to manage the interaction between EVs and D-EVSE. We name this the decentralized-GT (D-GT) model. This model aims to find the optimal solution for EVs and D-EVSE based on the concept of win-win. We design a decentralized profit maximization algorithm to help D-EVSE take profit from the electricity price variation during the day when selling or buying electricity respectively to EVs or from the grid or EVs as discharging processes. We implement different scenarios to these models and show through analytical and simulation results that our proposed models help to minimize the D-EVSE stress level, increase the D-EVSE sustainability, maximize the D-EVSE profit, as well as maximize EV drivers’ satisfaction and reduce EVs’ waiting time.
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Urban, Michal. "Návrh a vývoj napájecího zdroje notebooků do běžných motorových vozidel." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442523.
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Cílem této práce je navrhnout a sestavit napájecí zdroj pro notebooky různých výrobců pro použití v osobních a nákladních automobilech a na motocyklech s výstupním výkonem až 120W. Výsledný zdroj obsahuje USB-C konektor pro podporu napájení notebooků a chytrých zařízení s podporou Power Delivery, dále USB-A konektor s podporou Quick Charge 3.0 a také 12V automobilovou zásuvku pro možnost připojení dalšího automobilového příslušenství. Napájecí zdroj dále disponuje ochranou proti přepětí a přepólování vstupního napětí a také ochranou proti přetížení jednotlivých výstupů. Součástí zařízení je také LED displej, který uživateli umožňuje pomocí vstupního rozhraní jednoduše nastavit výstupní napětí pro notebook a sledovat aktuální hodnoty všech výstupů. Pro nastavování výstupu, indikaci a ochrany je použit mikrokontroler Arduino Nano.
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Büchner, Stefan. "Energiemanagement Strategien für elektrische Energiebordnetze in Kraftfahrzeugen." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2008. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1228736572957-56492.
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Die elektrische Energieform gewinnt im Kraftfahrzeug wegen ihrer Nutzungsvielfalt und sehr guten Steuerbarkeit für die Realisierung neuartiger Funktionen zunehmend an Bedeutung. Voraussetzung für ihren Einsatz ist eine zuverlässige und effiziente Bereitstellung durch das Kfz-Energiebordnetz. Dafür ist ein intelligentes Energiemanagement erforderlich, welches mit geeigneten Strategien die Leistungsflüsse im Energiesystem koordiniert. In dieser Arbeit werden die beiden Entwurfsziele der Zuverlässigkeit und der Effizienz bei der Entwicklung von elektrischen Energiemanagement-Strategien systematisch betrachtet. Es erfolgt eine Beschreibung und Zuordnung der einzelnen Ziele und Maßnahmen anhand der Energieflüsse und Wirkungsketten. Ein Schwerpunkt bildet dabei die Beherrschung von Lastwechseln im Bordnetz. Für Aussagen hinsichtlich einer effizienten Erzeugung elektrischer Energie erfolgt eine Untersuchung der Energiewandlungskette anhand analytischer Methoden und mit Hilfe einer simulationsgestützten Optimierung. Ein weiterer Fokus der Arbeit liegt in der Betrachtung zur Anwendung ökonomischer Modelle für eine Energiekoordination. Es werden die theoretischen Grundlagen der Mikroökonomie zusammengestellt und mögliche Funktionsstrukturen eines einseitigen und zweiseitigen Allokationsmechanismus verglichen und bewertet. Abschließend zeigen experimentelle Untersuchungen an einem Bordnetzprüfstand zum Lastwechselverhalten und die Integration eines Energiemanagement-Systems den praktischen Bezug zum realen System.
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Zhou, Qinsheng. "Integrative Power Supply Solution for Future Generation Vehicles." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-180331.
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Abstract: How to secure the power supply for future generation vehicles is an open question. This thesis uses Web-HIPRE as a tool of Decision Support System to predict the main compositions of future generation vehicles and also analyzes the advantages and shortages of currently existing solutions. The method of system approach is utilized to find out common problems of those existing solutions and to form an integrative solution. A model for this integrative solution is built under PowerSIM environment and the main objective of the model is to simulate the energy balance between power supply and demand. Finally, a brief discussion mainly focuses on the social and economic impact of the solution is made under PEBOSCA framework.
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Hergemöller, Thorsten. "Optimierung des Motorbetriebsverhaltens und der Abgasemissionen beim Start und Warmlauf eines Ottomotors mit Sekundärluftlader." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2004. http://nbn-resolving.de/urn:nbn:de:swb:14-1094711942578-78511.
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Es werden Möglichkeiten untersucht, das Kaltstart- und Warmlaufverhalten von Ottomotoren mit Sekundärlufteinblasung zu optimieren. Das für die Untersuchungen eingesetzte, innovative Sekundärlufteinblasesystem mittels Sekundärluftlader weist aufgrund der Baugröße, des Gewichts, der Leistungsfähigkeit und insbesondere der einfachen, thermodynamischen Betätigung Potenziale auf, die bisher eingesetzte Sekundärluftpumpe zu ersetzen. Den experimentellen Untersuchungen wurde die Entwicklung der Abgasgesetzgebung sowie eine theoretische Betrachtung der Entstehungsmechanismen von Abgasemissionen vorangestellt. Mittels eines Simulationsmodells werden die Abhängigkeiten des Sekundärluftladers von den motorischen Randbedingungen abgebildet. Somit kann eine Vorauswahl für das Luftmassenförderverhalten des Sekundärluftladers bei unterschiedlichen Einsatzbereichen getroffen werden. Die im Start- und Warmlauf, ebenso im Lastwechsel, gemessenen Ergebnisse wurden zur Analyse der Emissionsverbesserungsmechanismen eingesetzt. Insbesondere der Einblasezeitpunkt der Sekundärluft und das Hochlaufverhalten des Sekundärluftsystems zeigen einen enormen Einfluss auf die Höhe der Rohemissionen. Eine Gegenüberstellung aller gemessenen Varianten mit Sekundärluftpumpe und Sekundärluftlader zeigt einen deutlichen Emissionsvorteil des Sekundärluftladersystems. Zusätzlich bewirkt der Sekundärluftlader, durch die Bordnetzentlastung eine Motorlastabsenkung bei verbessertem Ansprechverhalten und höherem Sekundärluftmassenstrom. Ergebnis ist eine Verringerung der HC-Rohemissionen zwischen 20% und 30%. Die Vorteile im Gewicht und Bauvolumen sowie der geringere Verkabelungsaufwand runden die deutlichen Vorteile des Sekundärluftladers gegenüber der Sekundärluftpumpe ab. Durchgeführte Untersuchungen bei Tieftemperatur (-7°C) und unter Höhenbedingungen haben ebenfalls Vorteile gegenüber der Sekundärluftpumpe ausgewiesen. Die theoretische Abschätzung des Einsatzfeldes für den Sekundärluftlader ist ab einem Hubraum von 1,2°l Hubraum durchgeführt und als positiv bewertet wordenThe paper investigates possible ways of optimizing the cold-start and warm-up performance of gasoline engines with secondary air injection. Due to its size, weight, performance capability, and especially its simple, thermodynamic operation the innovative secondary air injection system used for the investigations and featuring a secondary air charger has the potential to replace the secondary air pump used to date. The experimental investigations are preceded by the development of exhaust emission legislation and a theoretical analysis of the process leading to exhaust emissions. A simulation model is used to illustrate the dependencies of the secondary air charger on boundary engine conditions. Consequently it is possible to make a preselection for the air mass conducting properties of the secondary air charger in various fields of application. The results obtained by measurement in starting, warm-up, and in load changes, were used to analyze the emission improvement processes. The level of raw emissions is affected enormously by the time of injection of secondary air and the acceleration performance of the secondary air system. A comparison of all the measured variants with the secondary air pump and secondary air charger indicates that the secondary air charger system has a distinct emission advantage. In addition, by relieving the vehicle power supply the secondary air charger brings about a reduction in engine load, improved response, and higher secondary air mass flow. The result is a 20% to 30% reduction in raw HC emissions. The significant advantages over the secondary air pump are rounded off by benefits in terms of weight and bulk volume and a reduction in the amount of wiring. Tests conducted at low temperature (-7°C) and under high altitude conditions have also indicated advantages over the secondary air pump
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Yang, Gang. "Design of a High Efficiency High Power Density DC/DC Converter for Low Voltage Power Supply in Electric and Hybrid Vehicles." Thesis, Supélec, 2014. http://www.theses.fr/2014SUPL0011/document.
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Cette thèse traite de la conception d’un convertisseur DC / DC destiné aux véhicules électriques et hybrides (2,5 kW, 400V/14V, 250kHz). Dérivé de la topologie LLC à résonance, ce convertisseur bénéficie des nombreux avantages propres à cette structure particulière. C’est ainsi que le prototype réalisé présente un rendement très élevé, une densité de puissance très forte avec des perturbations EMI très réduites. La première partie de cette thèse est consacrée à l’analyse théorique du circuit LLC afin de dégager un modèle de conversion et une stratégie de contrôle adaptée à l’application visée. Afin de conserver un rendement important sur une large plage de charge, une structure basée sur la mise en parallèle de deux modules LLC est proposée. Une nouvelle stratégie de contrôle à deux boucles est également proposée pour équilibrer le courant entre les deux modules. La seconde partie de la thèse fait appel à la simulation et à l’expérimentation. Il s’agit de minimiser la masse et l’encombrement tout en maximisant le rendement. Un composant magnétique spécial est conçu puis dimensionné pour intégrer le transformateur et diverses inductances de résonance. Ce convertisseur met également en œuvre un système de redressement synchrone robuste avec une compensation de phase, un module de puissance avec une résistance thermique très faible et un système de refroidissement efficace par air. Le rendement maximal mesuré est 95%. Le rendement demeure supérieur à 94% sur une plage de puissance s’étalant de 500 W à 2 kW. La densité de puissance est 1W/cm3. La CEM du convertisseur est développée dans cette thèseIn this dissertation, a 2.5kW 400V/14V, 250kHz DC/DC converter prototype is developed targeted for electric vehicle/hybrid vehicle applications. Benefiting from numerous advantages brought by LLC resonant topology, this converter is able to perform high efficiency, high power density and low EMI. A first part of this dissertation is the theoretical analysis of LLC: topology analysis, electrical parameter calculation and control strategy. To arrange high output current, this thesis proposes parallel connected LLC structure with developed novel double loop control to realize an equal current distribution. The second part concerns on the system amelioration and efficiency improvement of developed LLC. A special transformer is dimensioned to integrate all magnetic components, and various types of power losses are quantified based on different realization modes and winding geometries to improve its efficiency. This converter also implements a robust synchronous rectification system with phase compensation, a power semiconductor module, and an air-cooling system. The power conversion performance of this prototype is presented and the developed prototype has a peak efficiency of 95% and efficiency is higher than 94% from 500W to 2kW, with a power density of 1W/cm3. The CEM analysis of this converter is also developed in this thesis
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Marais, Charel. "Analysis of fuel consumption reduction potential through the use of an electrically driven air conditioning compressor." Thesis, Nelson Mandela Metropolitan University, 2007. http://hdl.handle.net/10948/774.
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The disturbing current situation regarding the world climate has initiated a major wave of urgent developments towards decreasing the overall impact of human activities on the living environment. A major role player in this development is the automobile industry that is inherently connected to pollution of various types, be it air, water or noise pollution. There have been drastic changes not only in the technologies employed in producing vehicles and components, but also in the construction and technologies built into modern automobiles to lessen the overall environmental impact of the industry. Noxious emissions have been decreased, overall efficiencies increased and vehicles are becoming more economical with each new generation. Stricter laws dictate that the level of acceptable vehicle emissions is to be decreased ever further and all manufacturers are developing various possibilities to achieve this. With the emergence of hybrid vehicle technology, there was also a sudden development of different electrical systems that were made viable by the higher onboard voltage systems employed in hybrid vehicles. One of these developments was the electrical air conditioning compressor for use in automobile applications. Although it is designed to operate with a higher voltage than the traditional 12V onboard vehicle systems, it is theoretically possible to incorporate it into a 12V system by making use of a DC-DC converter to step up the supply voltage of the electrical compressor sufficiently to allow for its successful operation. The question therefore arises whether it would be feasible and sensible to employ an electrical air conditioning system in conventional combustion engine vehicles from an overall fuel consumption and vehicle emissions point of view. A modelling approach was taken where an overall vehicle driving simulation was created to represent an average modern production vehicle. The simulation was then extended to include the options of incorporating models for both mechanically and electrically driven air conditioning systems. This provides insight into the influences of the air conditioning system on the vehicle’s overall fuel consumption and an opportunity to compare the influences from the two different systems. This study attempted to provide answers to some of the viability questions regarding the incorporation of electrically driven air conditioning systems into vehicles that use standard 12V onboard voltage systems. It was found that the electrical system has definite potential as a viable replacement option for the conventional system should it be combined with an appropriate alternator and equipped with an efficient control system.
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Luca, de Tena Diego [Verfasser], and Hans [Akademischer Betreuer] Müller-Steinhagen. "Large scale renewable power integration with electric vehicles : long term analysis for Germany with a renewable based power supply / Diego Luca de Tena Costales. Betreuer: Hans Müller-Steinhagen." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2014. http://d-nb.info/1060048051/34.
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Dinca, Dragos. "Development of an Integrated High Energy Density Capture and Storage System for Ultrafast Supply/Extended Energy Consumption Applications." Cleveland State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=csu1495115874616384.
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Kuo, Yu-Chieh, and 郭毓介. "High power density of the vehicle power supply." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/33697613470071097936.
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碩士崑山科技大學
電子工程研究所
100
In this thesis two small thin car power adapter was explored. The isolated and non-isolated adaptor power rating was 80W and 95W respectively. The push-pull topology was used for isolated power converter order to satisfy thin design. The size of this power converter was 132 (L) * 60 (W) mm and thickness was 13 (H) mm. In non-isolated power converter, boost topology with synchronous rectification was utilized. The size of this power converter was 65 (L) * 47 (W) * 20 (H) mm.
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LEE, JIING HWANG, and 李景煌. "A Study on Electromagnetic Compatibility for the Power-Supply System of the Vehicle." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/47134111746302606596.
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碩士國立臺灣科技大學
電機工程系
88
This thesis focuses on the problems of the electromagnetic compatibility due to the power-supply system of the vehicles. For evaluating background noise levels before the Taiwan high-speed train system is built, the power-frequency magnetic fields and radio-frequency electromagnetic noises are measured at several locations near the high-speed train route. The measured results are also compared emission of the whole railway system to the outside world with the European Norm, prEN50121-2. Besides, the magnetic compatibility measurements are performed for the vehicles of the Taiwan Train Company and Taipei Rapid Transit Corporation, and also an electric motorcycle. The results are compared with the European Norm and China National Standard. Thus, the electromagnetic interferences due to those vehicles can be analyzed. On the other hand, approaches for shielding magnetic fields are also studied in this thesis. The shielding performance of the metal wires on power-frequency magnetic fields is evaluated by applying a quasi-static magnetic method. Also, a finite element program, FLUX3D, is used to determine the shielding effects of the metal plates on low-frequency magnetic fields. Besides, measurements on the magnetic field shielding of the metal plates are performed to verify the simulation results. Thus, those methods may be employed to mitigate the low-frequency magnetic-field interferences caused by vehicle systems.
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Hutchinson, Shane Robert. "Power supply, protection, and harmonic analysis for an electric vehicle charging system in a large parking deck." 2010. http://www.lib.ncsu.edu/theses/available/etd-12172009-160921/unrestricted/etd.pdf.
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Cheng, Cheng-Yan, and 鄭裎諺. "Stackable power supply system for automatic guided vehicles." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/b6vv24.
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碩士國立中央大學
機械工程學系
105
The purpose of the thesis is to design the power system of the Automated Guided Vehicle. We use Li- ion battery as a power source, and series six Li-ion batteries as one Li-ion battery package. It can also series different Li-ion battery packages to supply different voltage for use. Meanwhile, we complete electricity measurement, charge process management, and dispatch the power for the power system. The power system uses open circuit voltage with Coulomb Counting Method to measure the electricity, balance Li-ion batteries power by discharge to lengthen life cycle and use appropriate charge process management according to the different voltage of Li-ion batteries. We also design various protected circuits to confirm the safety of using power. The power system can use in different needs by different configuration. We design power supply management, charge process management, and dispatching power experiment in the experiment design chapter in the thesis to confirm the feasibility of the system.
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Lai, Chung-Yi, and 賴忠義. "Implementation of Power Supply System in High-Gain Power Conversion Technology for Electric Vehicles." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/e6efut.
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碩士國立虎尾科技大學
電機工程研究所在職專班
99
This thesis uses the new model with high efficient pressure and the motor actuates the controller to complete the electric car system design and practice on site, which is used to the rapid development of the electric vehicle. The circuit structure is integrated by Boost, Forward and Flyback. Design is simple that circuit needs a pulse width modulation (PWM) signal output only. This converter can be used in low voltage input and high voltage out-put products, besides to apply in electric vehicle with li-ion battery.
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KE, YU-CHENG, and 柯育承. "Design and Implementation of Dual-Battery Power-Supply system for Electric Vehicles." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/243s33.
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碩士國立臺南大學
電機工程學系碩博士班
107
The purpose of this thesis is to develop a battery-hybrid power-supplying system including with both energy batteries and power batteries for electric vehicle. In the system, energy batteries are responsible for providing steady-state load current, while power batteries mainly offer the EV load transient impulse current. As a result, the proposed battery-hybrid power-supplying system has larger current output ability that can provide higher motor driving current than traditional electric vehicles. In the thesis, the power conversion circuit is optimized by the wide-bandgap silicon carbide power transistor. And the prototype tests are carried out by both computer simulation and physical circuit. With test results, it can be seen motor-driving ability and flexibility of proposed power-supplying system are highly improved, hence confirming the feasibility of the method for EV applications.
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Στυλογιάννης, Αχιλλέας. "Μελέτη και κατασκευή διάταξης φορτισης ηλεκτροχημικών συσσωρευτών για ηλεκτροκίνητο όχημα." Thesis, 2013. http://hdl.handle.net/10889/7511.
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Η παρούσα διπλωματική εργασία πραγματεύεται τη θεωρητική ανάλυση και προσομοίωση διάταξης φόρτισης ηλεκτροχημικών συσσωρευτών για ηλεκτροκίνητο όχημα καθώς και την κατασκευή της για την πειραματική απόδειξη της ορθής λειτουργίας της.This thesis deals with the theoritical analysis and simulation of power supply for electric vehicle and the construction for experimental evidence for the proper functioning of the power supply.
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Salve, Rima. "PV Based Converter with Integrated Battery Charger for DC Micro-Grid Applications." Thesis, 2014. http://hdl.handle.net/1805/6108.
Full textAbstract:
Indiana University-Purdue University Indianapolis (IUPUI)This thesis presents a converter topology for photovoltaic panels. This topology minimizes the number of switching devices used, thereby reducing power losses that arise from high frequency switching operations. The control strategy is implemented using a simple micro-controller that implements the proportional plus integral control. All the control loops are closed feedback loops hence minimizing error instantaneously and adjusting efficiently to system variations. The energy management between three components, namely, the photovoltaic panel, a battery and a DC link for a microgrid, is shown distributed over three modes. These modes are dependent on the irradiance from the sunlight. All three modes are simulated. The maximum power point tracking of the system plays a crucial role in this configuration, as it is one of the main challenges tackled by the control system. Various methods of MPPT are discussed, and the Perturb and Observe method is employed and is described in detail. Experimental results are shown for the maximum power point tracking of this system with a scaled down version of the panel's actual capability.