Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 201 for “"power transfer"”.
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Power transfer through strongly coupled resonances
… demonstrate efficient non-radiative power transfer over distances of up to eight times the radius of the coils. We use this system to transfer 60W with approximately 45% efficiency over distances in excess of two meters. We present a quantitative model describing the power transfer …
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Miniaturized, Directional Antennas For Wireless Power Transfer
… battery. In this thesis the prospect of wireless power transfer for use in the remote powering of wireless devices is explored. First a UHF wireless power transfer systems is designed and tested to explore the feasibility of wireless power transfer. Next, two miniaturized antennas, an electrically …
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Efficient Magnetic Resonance Wireless Power Transfer Systems
… the performance of magnetic resonance wireless power transfer systems. Different factors have different effects on the performance and the efficiency of the maximum transfer of power in the system. These factors are: the resonance frequency; the quality factor of the resonators; the value and …
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Poly-phase inductively coupled power transfer systems
… high tolerance to lateral movement of inductive power transfer (IPT) pickups. IPT is a technology that is widely used for providing power to mobile loads in industrial situations or for monorails where the path of the load is well defined and tightly constrained. A poly-phase track provides …
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Inductively-coupled power transfer for electromechanical systems
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
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Coupled resonator based wireless power transfer for bioelectronics
… miniaturized and sophisticated bioelectronics is powering. Integration and development of wireless power transfer (WPT) technology, however, can overcome this challenge.</p> <p>In this dissertation, I propose the use of coupled resonator WPT for bioelectronics and present a new generalized …
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Subtransmission power system amelioration through increased power transfer
… for the amelioration of subtransmission power systems through increased power transfer by reviewing various infrastructure technologies and solution approaches. In South Africa, as a developing country, there are subtransmission grid areas where reliability and spare capacity have …
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Design and Control of Capacitive Power Transfer Systems
Wireless power transfer (WPT) has enjoyed growing popularity in the past few decades as it provides a flexible and effective way of delivering power to loads without any physical contact. Among all the forms of conducting WPT, inductive power transfer (IPT) technology is the most extensively used. …
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Fully Integrated Wireless Power Transfer System For Biomedical Applications
Wireless power transfer (WPT) is commonly realized by means of near-field inductive coupling and is critical to many applications. It is highly desirable to fully integrate the receiver coil (Rx) and power shaping circuits on a single chip in a standard CMOS process with no additional …
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Incorporating Wireless Power Transfer in an LED Lighting Application
… this problem using different methods of wireless power transfer. Today, wireless power transfer has only been commercially demonstrated at small distances through use of induction. This thesis demonstrated the transfer of wireless power at relatively large distances through radio frequencies in …
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A self-tuning 100 watt wireless power transfer system
… presents a new method of controlling wireless power transfer suitable for highly resonant magnetically coupled systems. An application of this system is unattended autonomous operation such as recharging of autonomous underwater vehicles or underwater sensor networks. Special attention is given …
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Wireless Information and Power Transfer Methods for IoT Applications
… commonplace, demand for self-sustainable and low-power networking schemes has increased. Future IoT devices will require a ubiquitous energy source and will need to be capable of low power communication. RF energy can be harvested through ambient or dedicated RF sources to satisfy this energy …
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Fully Integrated Data and Power Transfer Systems with Galvanic Isolation
… addressed to the implementation of isolated data transfer and it is currently used for mass production. In this context, the principal purpose of my work was the investigation on a fully integrated dc-dc power converter with half-duplex data communications providing on chip galvanic isolation in …
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Alternative Power Transfer for Passive RFID Systems in Challenging Applications
… read over 42 m in a bistatic RFID system. Such a power consumption can be easily achieved by most energy harvesting techniques. It is demonstrated that a solar-powered semi-passive tag can be read at a range of 22 m, but its performance is still limited by multipath effects. A distributed antenna …
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Adaptive primary side control for a wireless power transfer optimization
A resonant inductive wireless power transfer system, consisting of a primary (transmitter) circuit and secondary (receiver) circuit, was designed and implemented. This document also contains a novel indirect feedback method to optimize the power efficiency of a wireless transfer system. The …
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Maximizing Flexibility and Efficacy of Undersea Wireless Power Transfer Systems
… to achieve this is with remote undersea wireless power transfer (WPT) systems to allow AUV charging from remote areas of the ocean floor. While there has been significant research in WPT system design, these projects often tailor the design specifications towards a specific AUV shape, size, or …
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6.78MHz Omnidirectional Wireless Power Transfer System for Portable Devices Application
Wireless power transfer (WPT) with loosely coupled coils is a promising solution to deliver power to a battery in a variety of applications. Due to its convenience, wireless power transfer technology has become popular in consumer electronics. Thus far, the majority of the coupled coils in these …
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Synergetic Attenuation of Stray Magnetic Field in Inductive Power Transfer
… the electric vehicles (EVs) with inductive power transfer (IPT), owning to the large air gap between the transmitter and receiver. The methods for field attenuation usually introduce extra losses and reduce the efficiency. This study focuses on the synergetic attenuation of stray magnetic …
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Design of contactless capacitive power transfer systems for battery charging applications
The main aim of the thesis, is to develop a high power system for small and large air-gaps applications, concurrently possessing high efficiency. To tackle the problems stated, two modified converters where proposed. The first proposed topology could yield higher power transfer for small air-gap …
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