Journal ArticleDOI
Development of a wireless power transmission simulator based on finite-difference time-domain using graphics accelerators
TLDR
It is expected that a transient response analysis of WPT devices will become possible in the future using this simulation architecture, and only two physical quantities needed to be exchanged between the two GPUs: self-inductance and the magnetic coupling coefficient.Abstract:
We describe a method for simulating an electromagnetic induction type wireless power transmission (WPT) device. This simulator was based on the finite-difference, time-domain method. To reduce computation time, two graphics processing units (GPUs) were used as accelerators for the electromagnetic field computation. The first GPU calculated the electromagnetic field for the non-resonance state, and the second GPU calculated the field for the resonance state. Only two physical quantities needed to be exchanged between the two GPUs: self-inductance and the magnetic coupling coefficient. Capacitors and a load resistance were virtually connected to the coils as lumped elements. The experimental and simulation results were in good agreement. It is expected that a transient response analysis of WPT devices will become possible in the future using this simulation architecture.read more
Citations
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Journal ArticleDOI
Effectiveness of Convolutional Perfectly Matched Layer in Time-domain Numerical Analysis of Low-frequency Wireless Power Transfer
Journal ArticleDOI
Super-low-frequency wireless power transfer with lightweight coils for passing through a stainless steel plate.
TL;DR: It is shown using both calculations and experimental results that a power-to-weight ratio of 252 W/kg is possible even when using a 400 Hz power supply frequency.
Journal ArticleDOI
Analysis and Visualization of the Instantaneous Spatial Energy Density and Poynting Vector of the Wireless Power Transfer System
TL;DR: In this paper , the instantaneous spatial energy density and Poynting vector in the WPT system were analyzed, and it was found that the power is transferred only in the last half period of the PoyNTing vector, not at every moment of the whole period.
Journal ArticleDOI
Scheme for providing parity-time symmetry for low-frequency wireless power transfer below 20 kHz
TL;DR: In this article, parity-time symmetry (PT symmetry) was provided for a magnetic resonance wireless power transfer (WPT) system designed to operate below 20 kHz, and the proposed system oscillated at 16.5 kHz for a transmission distance of 15mm.
Journal ArticleDOI
Non-sine wave characteristic in the magnetic field of the wireless power transfer system
TL;DR: In this paper, a filament mode is built and a key expression of magnetic field (MF) is obtained, presenting a theoretical proof of the existence of the non-sine wave.
References
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Journal ArticleDOI
Wireless Power Transfer via Strongly Coupled Magnetic Resonances
Andre B. Kurs,Aristeidis Karalis,Robert Moffatt,John D. Joannopoulos,Peter H. Fisher,Marin Soljacic +5 more
TL;DR: A quantitative model is presented describing the power transfer of self-resonant coils in a strongly coupled regime, which matches the experimental results to within 5%.
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Journal ArticleDOI
Design and Optimization of Circular Magnetic Structures for Lumped Inductive Power Transfer Systems
TL;DR: In this article, 3-D finite-element analysis modeling is used to optimize circular power pads for electric vehicles to transfer 2-5 kW with a large air gap and have good tolerance to misalignment.
Journal ArticleDOI
Maximizing Air Gap and Efficiency of Magnetic Resonant Coupling for Wireless Power Transfer Using Equivalent Circuit and Neumann Formula
Takehiro Imura,Yoichi Hori +1 more
TL;DR: The relationship between maximum efficiency air gap is analyzed using equivalent circuits and the Neumann formula and proposed equations for the conditions required to achieve maximum efficiency for a given air gap are proposed.
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