wireless power transfer


Basic experimental study on helical antennas of wireless power transfer for electric vehicles by using magnetic resonant couplings
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Electric Vehicles (EVs) because it makes possible the process of automatically charging EVs. The technology of wireless power transfer requires three main elements: large air gaps, high efficiency and a large amount of power . Though, there has been no such technology

Wireless power transfer using weakly coupled magnetostatic resonators
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Wireless power transfer can create the illusion of portable devices with infinite power supplies and enable applications that are currently unimaginable because of power constraints. Magnetic induction has been extensively used for wireless power transfer , but its

Highly resonant wireless power transfer : safe, efficient, and over distance
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Driving home from the airport, Marin noticed his new smart phone was low on battery once again. Its HD display, and apps using GPS, Bluetooth, and LTE/4G data communications conspired to drain the battery quickly. Without looking, he dropped his phone into an open In recent years, significant efforts have been dedicated to developing implantable electronic medical devices for biomedical applications. An incomplete list of such devices includes endoscopic capsule, artificial retinal prosthesis, implantable ECG recorder, artificial heart

Quantitative analysis of a wireless power transfer cell with planar spiral structures
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An emerging technology of wireless power transfer technique based on electromagnetic resonant coupling, also known as witricity, has been drawing a lot of attention from academia as well as from practitioners since it was reported in 2007 by a group of

Stabilizing the operating frequency of a resonant converter for wireless power transfer to implantable biomedical sensors
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Resonant converters have been applied in wireless power supplies for implantable sensors due to their inherent advantages of low cost, high frequency and high reliability. However, the operating frequency of the resonant converter varies with the load and circuit parameters

Design of wireless power transfer system for railway application
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As wireless power transfer (WPT) technologies emerge in a wide range of applications including public transportation, many expect that applying the technology to the current railway systems will bring positive effects to current railway systems. In this paper, we

Wireless power transfer for e-mobility
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Abstract Wireless Power Transfer (WPT) is the process of transferring power from one circuit onto another without passing through any manmade conductive elements interconnecting them. Several schemes for wireless power transfer exists Inductive, Capacitive, Laser

Mid-range wireless power transfer and its application to body sensor networks
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It has been reported that, through the evanescent near fields, the strongly coupled magnetic resonance is able to achieve an efficient mid-range Wireless Power Transfer (WPT) beyond the characteristic size of the resonator. Recent studies on of the relay effect of the WPT allow

The coil misalignment model of inductively coupled wireless power transfer system: mutual inductance analysis and transfer efficiency optimization
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A novel means of optimizing transfer efficiency of Inductively Coupled wireless power transfer (WPT) system is presented for the first time. In the applications envisaged, such as electric vehicles and biomedical implants, generally the receiving coil is laterally and

Highly resonant wireless power transfer in subsea applications
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Recent technological advances have allowed unmanned underwater vehicles to act with more autonomy, allowing them to embark on longer missions to increasingly deeper and more difficult environments. While these vehicles can navigate themselves as they collect

Wireless power transfer
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Oak Ridge National Laboratorys Power Electronics Symposium Friday, July 22, 7:30 AM 3:30 PM (EDT) Oak Ridge National Laboratory (ORNL) Conference Center, Oak Ridge, Tennessee 2 Managed by UT-Battelle for the US Department of Energy There is need for an efficient

6.78 MHz capacitive coupling wireless power transfer system
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Wireless power transfer technologies typically include inductive coupling, magnetic resonance, and capacitive coupling methods. Among these methods, capacitive coupling wireless power transfer (CCWPT) has been studied to overcome the drawbacks of other The concept of wireless information and power transfer provides researchers with a unique set of challenges which is quite distinct from their traditional fixed power supply. New approaches in, wireless power transmission (or transfer )(WPT) is paramount as it helps us to

Metamaterial-based high-efficiency wireless power transfer system at 13.56 MHz for low power applications
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Magnetically coupled resonant wireless power transfer (WPT) has been employed in many applications, including wireless charging of portable electronic devices, electric vehicles and powering of implanted biomedical devices. However, transmission efficiency decreases

Flexible and mobile near-field wireless power transfer using an array of resonators
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In this report, we present a technology to realize flexible and mobile wireless power transfer , which is based on the coupling of an array of resonators. Near-field wireless power transfer using resonant coupling has been shown to be a promising technology for many

Spread spectrum technology to reduce the EMI from the constant voltage source type wireless power transfer system
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The electromagnetic interference (EMI) from the coil system for the wireless power transfer (WPT) with the voltage source and series LC resonance type can be reduced by 20dB at the most by using the spread spectrum technology when operating frequency 20 kHz, peak

Wireless power transfer via electric coupling
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Wireless power transfer technologies are greatly attractive and paid special attention. The reason is because mid- range wireless power transfer named as magnetic resonance was presented by MIT in 20071), 2). This phenomenon also holds in the electric field3). However, the wireless

Numerical electromagnetic analysis of human exposure for wireless power transfer systems
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This paper presents methods to demonstrate scientifically sound assessment of human exposure to wireless power transfer systems. The efficient transfer of wireless power has recently been demonstrated at distances within a few meters . These systems employ

Efficiency improvement of wireless power transfer via magnetic resonance using the third coil
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A wireless power transfer system via magnetic resonance has been reported by several groups [1-3]. In those reports, two resonance coils work as a transmission coil and a reception coil, respectively. The transfer efficiency between two coils is a function of the



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