Results 241 to 250 of about 91,704 (279)

Output-Controllable Efficiency-Optimized Wireless Power Transfer Using Hybrid Modulation

IEEE Transactions on Industrial Electronics, 2022
This paper proposes and implements an output-controllable efficiency-optimized wireless power transfer scheme using hybrid modulation. The key is to combine pulse frequency modulation (PFM) and on-off keying (OOK) modulation and to utilize feedback control.
Zhichao Hua 0002, K. T. Chau 0001, Wei Han 0007, Wei Liu 0098, Tze Wood Ching   +4 more
openaire   +2 more sources

Inductive-Resonant Wireless Power Transfer System with Hybrid Modulation

2020 17th Biennial Baltic Electronics Conference (BEC), 2020
This paper deals with inductive-resonant wireless power transfer (WPT) systems based on multilevel T-type inverters with simultaneous modulation of switching frequency and duty cycle. The effect of the hybrid modulation on the performance characteristics of closed-loop WPT systems with Ttype multilevel inverters for wireless battery charging is studied
D. Stepins, N. Kathari, J. Zakis, O. Husev, B. Pakhaljuk, V. Shevchenko   +5 more
openaire   +1 more source

Design and optimization of hybrid resonant loops for efficient wireless power transfer

International Journal of Circuit Theory and Applications, 2017
SummaryFrequency splitting, caused by magnetic overcoupling, is a great challenge in resonant wireless power transfer, which leads to decrease of transfer efficiency. In this paper, to avoid the frequency splitting, a new design of hybrid resonant loops with an inner coil positioned in the transmitter is proposed for efficient power transfer.
Meng Wang 0010, Yanyan Shi, Weikang Gao, Minghui Shen, Mingsheng Shen   +4 more
openaire   +1 more source

An Improved Hybrid Frequency Pacing Modulation for Wireless Power Transfer Systems

IEEE Transactions on Power Electronics, 2021
Zero voltage switching (ZVS) techniques are widely utilized to increase efficiency and reduce electromagnetic interference of wireless power transfer (WPT) systems. Hybrid frequency pacing (HFP) is an excellent modulation method for WPT systems because it can achieve full-load range ZVS without changing the current frequency or adding auxiliary ...
Jiaqi Tang, Qianfan Zhang, Chao Cui, Tuopu Na, Tengfei Hu   +4 more
openaire   +1 more source

180° Hybrid Coupler for a Full-wave Power Rectifier Detector for Wireless Power Transfer

2020 Seventh International Conference on Information Technology Trends (ITT), 2020
This paper presents a novel design for a full-wave rectifier using a $180^{\mathrm{o}}$ hybrid coupler. This technique ensures a $180^{\mathrm{o}}$ phase shift for providing two inputs to a diode bridge with receiving dual inputs from antennas for combining radio frequencies.
Rached O. Agwil, Serioja O. Tatu
openaire   +1 more source

Hybrid Frequency Pacing for High-Order Transformed Wireless Power Transfer

IEEE Transactions on Power Electronics, 2021
This article proposes and implements a hybrid frequency pacing (HFP) technique for resonating a high-order transformed wireless power transfer (WPT) system with robust zero-voltage switching (ZVS). As a hybrid frequency modulation, the proposed HFP can efficiently tune the innate constant-frequency resonances of WPT.
Wei Liu, K. T. Chau, Christopher H. T. Lee, Xiaoyang Tian, Chaoqiang Jiang   +4 more
openaire   +1 more source

Hybrid planar Litz coil optimization for phone wireless power transfer

2021 IEEE Applied Power Electronics Conference and Exposition (APEC), 2021
This paper proposes an innovative receiver coil structure for wireless power charging suitable for portable devices with thickness constraint. Litz wires represent the best solution for high-efficiency wireless power transfer coil but cannot be implemented in a thin structure.
Ursino M., Saggini S., Yang L., Specogna R., Jia L., Iob F., Wang L., Tian Q., Lakshmikant S.   +8 more
openaire   +2 more sources

An Efficient Hybrid Wireless Power Transfer System with Less Gain Fluctuation

2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC), 2018
This paper proposed a hybrid wireless power transfer (HWPT) system that combines inductive power transfer (IPT) and capacitive power transfer (CPT). The HWPT system is advantageous in that it is not sensitive to pressure change compared with conventional CPT system. Compared with IPT system, the HWPT is superior with higher efficiency.
Xu Chen, Shengbao Yu, River T.H. Li, Xiaobo Yang   +3 more
openaire   +2 more sources

Magnetic Beamforming Algorithm for Hybrid Relay and MIMO Wireless Power Transfer

2019
Using magnetic beamforming, the power transmission efficiency can be highly increased for realizing the practical near-field magnetic resonant coupling (MRC) wireless power transfer (WPT). The usage of relay coils is also of great benefit for power transmission in the WPT system containing multiple transmitters (TXs) each with a coil. In this paper, we
Bin Ma 0023, Yubin Zhao, Xiaofan Li 0001, Yuefeng Ji, Cheng-Zhong Xu 0001   +4 more
openaire   +1 more source

A Novel Three Leg Inverter for High Power Hybrid Inductive and Capacitive Wireless Power Transfer System

IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, 2019
A novel topology for hybrid wireless power transfer (HPT), which uses both capacitive and inductive action, for electric vehicle charging is proposed in this paper. A three leg inverter topology is used for HPT. Two legs of the inverter, switched at 85 kHz, are used for inductive wireless power transfer (IPT) and the third leg, switched at 1 MHz, is ...
Deepa Vincent, Phuoc Huynh Sang, Sheldon S. Williamson   +2 more
openaire   +1 more source