IEEE Organizations related to Wireless Power Transfer

Back to Top

No organizations are currently tagged "Wireless Power Transfer"



Conferences related to Wireless Power Transfer

Back to Top

No conferences are currently tagged "Wireless Power Transfer"


Periodicals related to Wireless Power Transfer

Back to Top

No periodicals are currently tagged "Wireless Power Transfer"


Most published Xplore authors for Wireless Power Transfer

Back to Top

Xplore Articles related to Wireless Power Transfer

Back to Top

Methods of study of WPT systems

Methods of study of WPT systems, 07/15/2015

This course reviews the different methods that can be used to study wireless power transfer systems, including equivalent circuit method, two-port network theory, S-parameter analysis with the help of a network analyzer, and numerical methods. Topics covered include: Analytical method approach: equivalent circuit analysis; Two port networks; S-Parameter analysis; Transmission efficiency and Impedance matching.


Wireless Power Transfer Strategies for Implantable Bioelectronics

IEEE Reviews in Biomedical Engineering, 2017

Neural implants have emerged over the last decade as highly effective solutions for the treatment of dysfunctions and disorders of the nervous system. These implants establish a direct, often bidirectional, interface to the nervous system, both sensing neural signals and providing therapeutic treatments. As a result of the technological progress and successful clinical demonstrations, completely implantable solutions have become a ...


85 kHz band 44 kW wireless power transfer system for rapid contactless charging of electric bus

2016 International Symposium on Antennas and Propagation (ISAP), 2016

A 44 kW wireless power transfer (WPT) system is being developed for rapid contactless charging in an electric bus in the 85 kHz band, the candidate frequency for a wireless charging system for light-duty vehicles that is currently undergoing standardization. A two-channel WPT system with currents of opposite phase in the two transmit pads of the channels is introduced to ...


Modeling and optimization of single-turn printed coils for powering biomedical implants

2017 IEEE Wireless Power Transfer Conference (WPTC), 2017

A new coil optimization procedure is proposed for inductively coupled wireless power transfer when square single-turn printed coils are used, by means of analytically modeling the self- and mutual-inductances, parasitic resistances, and parasitic capacitances of these coils. As an example, the average diameter and trace width of the transmitting coil and the trace width of the receiving coil are optimized ...


Broad Range Impedance Matching using Magnetic Resonance WPT Parameter Extraction with Coil Placement

2018 International Symposium on Antennas and Propagation (ISAP), 2018

This paper presents a method of optimizing the impedance matching by changing the wireless power transfer characteristics according to the placement and relative positions of the resonance coils by equivalent circuit analysis. For the case of 3-coils configuration, the transmission characteristics deteriorate with the change of the coil position. When 4-coils are used, the efficiency is maintained more than 80% ...


More Xplore Articles

Educational Resources on Wireless Power Transfer

Back to Top

IEEE-USA E-Books

  • Methods of study of WPT systems

    This course reviews the different methods that can be used to study wireless power transfer systems, including equivalent circuit method, two-port network theory, S-parameter analysis with the help of a network analyzer, and numerical methods. Topics covered include: Analytical method approach: equivalent circuit analysis; Two port networks; S-Parameter analysis; Transmission efficiency and Impedance matching.

  • Wireless Power Transfer Strategies for Implantable Bioelectronics

    Neural implants have emerged over the last decade as highly effective solutions for the treatment of dysfunctions and disorders of the nervous system. These implants establish a direct, often bidirectional, interface to the nervous system, both sensing neural signals and providing therapeutic treatments. As a result of the technological progress and successful clinical demonstrations, completely implantable solutions have become a reality and are now commercially available for the treatment of various functional disorders. Central to this development is the wireless power transfer (WPT) that has enabled implantable medical devices (IMDs) to function for extended durations in mobile subjects. In this review, we present the theory, link design, and challenges, along with their probable solutions for the traditional near-field resonant inductively coupled WPT, capacitively coupled short-ranged WPT, and more recently developed ultrasonic, mid-field, and far-field coupled WPT technologies for implantable applications. A comparison of various power transfer methods based on their power budgets and WPT range follows. Power requirements of specific implants like cochlear, retinal, cortical, and peripheral are also considered and currently available IMD solutions are discussed. Patient's safety concerns with respect to electrical, biological, physical, electromagnetic interference, and cyber security from an implanted neurotech device are also explored in this review. Finally, we discuss and anticipate future developments that will enhance the capabilities of current- day wirelessly powered implants and make them more efficient and integrable with other electronic components in IMDs.

  • 85 kHz band 44 kW wireless power transfer system for rapid contactless charging of electric bus

    A 44 kW wireless power transfer (WPT) system is being developed for rapid contactless charging in an electric bus in the 85 kHz band, the candidate frequency for a wireless charging system for light-duty vehicles that is currently undergoing standardization. A two-channel WPT system with currents of opposite phase in the two transmit pads of the channels is introduced to reduce radiated emissions to within the Radio Act limits by cancelling the emission from each channel. In this paper, the measured power for the 44 kW WPT system is shown.

  • Modeling and optimization of single-turn printed coils for powering biomedical implants

    A new coil optimization procedure is proposed for inductively coupled wireless power transfer when square single-turn printed coils are used, by means of analytically modeling the self- and mutual-inductances, parasitic resistances, and parasitic capacitances of these coils. As an example, the average diameter and trace width of the transmitting coil and the trace width of the receiving coil are optimized when the average diameter of the receiving coil and the transfer distance are assumed to be fixed. The efficiency is improved by 30% (i.e., form 40% to 70%) in comparison with the existing optimization method.

  • Broad Range Impedance Matching using Magnetic Resonance WPT Parameter Extraction with Coil Placement

    This paper presents a method of optimizing the impedance matching by changing the wireless power transfer characteristics according to the placement and relative positions of the resonance coils by equivalent circuit analysis. For the case of 3-coils configuration, the transmission characteristics deteriorate with the change of the coil position. When 4-coils are used, the efficiency is maintained more than 80% over certain range regardless of the coil position with the proposed impedance matching.

  • Magnetic Resonance Coupling Modelling for Electric Vehicles Wireless Charging

    Due to the fast-growing market for the electric vehicle, it is necessary that the drawbacks involved in it should be overcome, therefore introducing wireless charging technique which is more convenient as battery cost, recharge time and weight has been removed. Different wireless charging techniques for electric vehicles are discussed. The feasibility of wireless power transfer for Electric Vehicles by electromagnetic resonance coupling is modelled in this paper. Wireless power transfer (WPT) for Electric Vehicles by magnetic resonance coupling is of high priority due to its efficiency, high power transmission and larger charging distance. Also, we demonstrated with simulations how energy can be transferred efficiently between two magnetically coupled resonating coils. Also, the effect of parameters such as the inductor, capacitor, load, and coupling coefficient on efficiency are also discussed.

  • A methodology on the efficiency of wireless power transfer for the low power system

    Wireless power transfer (WPT) is the technology that forces the power to transmit electromagnetic field to an electrical load through an air gap without interconnecting wires. This technology is widely used for the applications from low power smartphone to high power electric railroad. In this paper, the model of wireless power transfer circuit for the low power system is designed for a resonant frequency of 13.45 MHz. Also, a feedback WPT circuit is proposed, and the methodology for power efficiency improvement is studied as the coupling coefficient increases above 0.01, at which the split frequency is made.

  • Design of miniaturized high frequency printed coils for wireless power transfer to biomedical implants

    Multi-turn, multi-stranded, dual layer microfabricated planar spiral coils with interlayer offset are proposed for improved wireless power transfer efficiency and miniaturization of biomedical implants. Multi-stranding coupled with an interlayer offset, enables implanted coils to operate at higher frequencies due to quality factor improvements. This ultimately leads to miniaturization of overall implant size. Simulation results show a quality factor improvement of 72% at 13.56 MHz in a tissue equivalent phantom.

  • A Research on Characteristics of Bidirectional Wireless Power Transfer System

    This paper presents an analysis of the bidirectional wireless power transfer (BWPT) system characteristics. Firstly, the BWPT system model with LCC compensation networks is built. Meanwhile, according to the system model, an equivalent two-port network is established. Then, the system output power and transmission efficiency in both charging directions are deduced. Finally, a 3.3kW BWPT system prototype is designed, and simulations are conducted to validate the analysis based on the prototype parameters. The results show that the forward output power variation trend with the primary side parallel compensation capacitance is similar to the backward output power variation trend with the secondary side parallel compensation capacitance, and vice versa. And, the variation trends of the system efficiency in both charging directions with the two capacitances share the same similarities.

  • System Level Efficiency Analysis for Regulated RF Near Field Coupling

    RF near field coupling systems offer the potential for very small coil area with high efficiency. However, little previous effort has been made in quantifying the various sources of loss in regulated RF near field coupling systems. This paper identifies the significant sources of loss in RF near field coupling and proposes a method of calculating the power loss without need for extensive simulation. This paper also proposes a model for the RF diode switching loss based on a machine learning algorithm, demonstrating a new approach to simply evaluate the diode switching loss.The proposed analysis is compared with measured data for a RF near field coupling system, showing good correlation between the proposed analysis and the measured results. In addition, the various sources of loss in RF near field coupling were compared and avenues for improving the efficiency in terms of the demonstrated analysis are discussed.



Standards related to Wireless Power Transfer

Back to Top

No standards are currently tagged "Wireless Power Transfer"


Jobs related to Wireless Power Transfer

Back to Top