Article
Engineering, Electrical & Electronic
Lingling Cao, Jiawei Bao, Ka-Hong Loo, Xuewei Pan, Ruihong Zhang
Summary: This paper thoroughly discusses the cross-coupling effect in a two-load IPT system, proposing a new model that considers this effect. The suggested control strategy includes adjusting the operating frequency and regulating the total output power and input impedance through coordinated adjustment of the inverter's duty cycle and transmitter-side compensation capacitance. The proposed hybrid control strategy ensures constant power distribution among loads, constant total output power, and inductive input impedance for zero voltage switching in the inverter.
IET POWER ELECTRONICS
(2023)
Article
Automation & Control Systems
Ahmed Allam, Christian Arrington, Christopher St John, Jef Steinfeldt, Alper Erturk, Ihab El-Kady
Summary: In this study, ultrasonic power transfer through metallic barriers was investigated using experiments, analytical modeling, and numerical simulations. A Class E amplifier design was integrated with the ultrasonic system, achieving 83% ac-to-ac efficiency through a 3 mm aluminum barrier at 1 MHz. The system's overall dc-to-dc efficiency peaked at 68% while delivering 17.5 W to a dc load.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2023)
Article
Engineering, Electrical & Electronic
Takamasa Segawa, Ryubi Aoyama, Masaya Tamura
Summary: This letter proposes an electrode design theory for capacitive biological wireless power transmission (WPT) using highly accurate equivalent circuits. The theory considers the permittivity, conductivity, and parasitic elements of the biological tissue and electrodes, and determines the optimal electrode sizes for high efficiency. Experimental results validate the accuracy of the equivalent circuit and simulation, and simulations show the design's resistance to misalignment. A safety evaluation confirms that the design can transmit 71 mW of power satisfying specific absorption rate (SAR) requirements specified in IEEE-C95.1.
IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Yao Wang, Hua Zhang, Fei Lu
Summary: Most existing capacitive power transfer (CPT) circuits suffer from reactive power loss and electric field emission due to unavoidable reactive power circulating. To address these issues, this letter proposes a parallel-parallel (PP) compensation-based CPT system with double-side series-parallel (SP) inductive power transfer (IPT) links. Experimental results show zero reactive power circulating and high-power transfer capability, with a peak efficiency of 94.6% at 1.62kW output power. Supplementary slides provide multimedia material on the motivations, contributions, and advantages of this design over existing CPT designs.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Nikola Rajko Mirkovic, Dorde M. Stojic, Alberto Delgado, Pedro Alou, Miroslav Vasic
Summary: In recent years, there has been a trend towards reducing the number of power conversion stages in electric vehicle charging applications. Matrix converter topology is seen as an attractive solution due to its high power density and small volume. This article proposes a novel modulation strategy for a three-phase to single-phase matrix converter, which ensures stable power flow between the grid and the EV. Experimental results demonstrate the effectiveness of the proposed method.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Yao Wang, Hua Zhang, Yue Cao, Fei Lu
Summary: Wireless power transfer (WPT) is an effective solution for electric vehicle charging. This article focuses on capacitive power transfer (CPT) and explores opportunities not yet reported in existing literature, based on duality with inductive power transfer (IPT). The article proposes a generic modeling method, compares power transfer mechanisms, demonstrates duality between IPT and CPT circuits, derives 14 CPT topologies based on duality with IPT circuits, and conducts a detailed comparison of these circuits.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2023)
Article
Computer Science, Information Systems
Lingshan Liu, Ke Xiong, Jie Cao, Yang Lu, Pingyi Fan, Khaled Ben Letaief
Summary: This article studies the wireless powered network assisted by unmanned aerial vehicles (UAVs), where the UAV charges ground nodes (GNs) wirelessly and the GNs use their harvested energy to upload information to the UAV. An optimization problem is formulated to minimize the average Age of Information (AoI) of the GNs by optimizing the trajectory of the UAV and the scheduling of information transmission and energy harvesting of GNs. A deep Q network (DQN)-based scheme is proposed to find a near-optimal solution. Simulation results demonstrate the convergence of the proposed DQN scheme and its superiority in terms of average AoI compared to other known schemes.
IEEE INTERNET OF THINGS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Yihe Zhao, Zhikang Li, Xiaozhang Wang, Guoxi Luo, Jie Li, Zixuan Li, Jiawei Yuan, Libo Zhao, Ping Yang, Zhuangde Jiang, Sandro Carrara
Summary: This study focuses on the performance of a biosensor based on CMUTs in liquid environment, and explores the impact of parasitic effects on its performance. Through the use of lumped element model (LEM) and finite element method (FEM) analysis, predictions and improvements on the parasitic effects of the biosensor were made.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Aldo Canova, Fabio Corti, Antonino Laudani, Gabriele Maria Lozito, Michele Quercio
Summary: This paper introduces a passive shielding system to mitigate the undesired dispersion of the magnetic field produced by a wireless power transfer system. The shield is optimized to achieve better shielding effectiveness and the impact on the performance of the system is evaluated.
IET POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Qing Xu, Duleepa J. Thrimawithana, Darren Svirskis, Ilva D. Rupenthal
Summary: This paper proposes a mutually decoupled transmission and receiver coil (MDC) system to improve the sensitivity of inductively coupled communication. The system is designed to be mounted on the frame of a spectacle and transfer detectable voltage signals through weak inductive coupling with an implant measuring intraocular pressure (IOP). The transmission coils excite the implant, while the decoupled receiver coils continuously monitor the self-resonant frequency of the implant to determine the IOP. Simulation and experimental results show the effectiveness of the MDC system in improving sensitivity.
IET POWER ELECTRONICS
(2023)
Article
Computer Science, Information Systems
Michail E. Kiziroglou, Steven W. Wright, Eric M. Yeatman
Summary: This paper presents a power supply that collects, stores, and delivers regulated power from the stray magnetic field of current-carrying structures, along with the design and circuit principles involved. This method may enable power autonomy to wireless sensors deployed in current-carrying infrastructure.
IEEE INTERNET OF THINGS JOURNAL
(2022)
Article
Computer Science, Information Systems
Hussein Mahdi, Reiji Hattori, Bjarte Hoff, Anyu Uezu, Katsumi Akiyoshi
Summary: Capacitive power transfer (CPT) is a near-field wireless power transfer technology that offers advantages in terms of cost, weight, flexibility, and mobility. This paper surveys empirical works, discusses design considerations, and compares measurement and simulation results of a CPT system. It also designs and tests a CPT system, achieving 100W transfer at 87.4% efficiency and 30mm separation distance. The paper concludes by discussing the design limitations and challenges in advancing CPT systems for wireless charging applications.
Article
Engineering, Multidisciplinary
Wei Zhou, Qiao Gao, Lijuan Xiang
Summary: An inductive-capacitive combined power transfer system is proposed for fast charging of rail transit inspection vehicles. The system utilizes both inductive and capacitive couplers to eliminate same-side coupling and features a dual-band compensation network for open-loop constant voltage output. Theoretical analysis and experimental verification demonstrate the power superposition and efficiency of the system.
Article
Engineering, Electrical & Electronic
Valentina Palazzi, Federico Alimenti, Paolo Mezzanotte, Luca Roselli
Summary: This article introduces a new circuit topology for a highly reconfigurable 1 x 4 radio frequency network, which can modify magnitude and phase relations among output signals while preserving matching at all ports. Experimental validation demonstrates the circuit's flexibility and potential.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2021)
Article
Energy & Fuels
Ying Liu, Jiantao Zhang, Chunbo Zhu, Ching Chuen Chan
Summary: This study provides a detailed analysis of the safety of human bodies in the electromagnetic field generated by inductive power transfer (IPT) systems designed for kitchen appliances. The research concludes that increasing the operating frequency of the IPT system can help to achieve international safety standards and effectively improve the safety of human bodies.
Article
Engineering, Electrical & Electronic
Francois Rottenberg, Gilles Callebaut, Liesbet Van der Perre
Summary: Large array systems achieve array gain at the user location by using a massive number of antenna elements and clever precoder designs, but this requires linear front-ends and specifically linear power amplifiers (PAs) to avoid distortion. The use of conventional precoders can induce coherent combining of distortion at the user locations, degrading the signal quality. This work proposes novel linear precoders that allow working close to saturation while cancelling the third-order nonlinearity of the PA without prior knowledge of signal statistics and PA model, resulting in significant performance gains compared to other precoding methods.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2023)
Article
Chemistry, Analytical
Guus Leenders, Gilles Callebaut, Geoffrey Ottoy, Liesbet van der Perre, Lieven De Strycker
Summary: Internet of Things technologies enable remote monitoring of natural areas, and this paper presents a multi-hop protocol that extends the sensor's range and enables low-power operation. The protocol achieves this by employing prolonged preamble sampling to maximize sleep time and forwarded data aggregation to minimize transmit energy. Real-life experiments and simulations prove the effectiveness of the protocol in increasing node lifespan and reducing energy consumption.
Article
Chemistry, Analytical
Jarne Van Mulders, Jona Cappelle, Sarah Goossens, Lieven De Strycker, Liesbet Van der Perre
Summary: The core idea of this paper is to use a UAV to provide energy to IoT nodes, prolonging their autonomy. A comparison is made between UAV-based recharging or battery replacement and full provisioning or remote RF-based wireless power transfer in terms of total energy consumption. An energy consumption model for a small license-free UAV is derived, and design and deployment parameters are explored. The results show that UAV-based servicing is more energy efficient for IoT nodes at distances further than a few meters, with the advantage increasing with distance. Battery swapping outperforms recharging from an energy perspective, and the ecological aspects are also evaluated.
Article
Chemistry, Analytical
Chesney Buyle, Lieven De Strycker, Liesbet van der Perre
Summary: Accurately positioning energy-constrained devices in indoor environments has been a subject of interest. Hybrid RF-acoustic ranging systems, using a phased loudspeaker array, have shown to improve the signal-to-interference-plus-noise ratio and achieve accurate distance measurements at ultra-low energy costs.
Proceedings Paper
Computer Science, Hardware & Architecture
Guus Leenders, Geoffrey Ottoy, Gilles Callebaut, Liesbet Van der Perre, Lieven De Strycker
Summary: Recent research focused on utilizing LoRa for long-range and low-power connections in the Internet of Things (IoT). A multi-hop LoRa-based protocol is proposed, tailored to battery-powered IoT devices, using preamble sampling and dynamic payload aggregation to improve energy efficiency. The protocol considers a fine-grained energy model impacting all protocol layers. The implementation in C and openness of the protocol are demonstrated in a successful experiment.
2023 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE, WCNC
(2023)
Proceedings Paper
Computer Science, Hardware & Architecture
Gilles Callebaut, Francois Rottenberg, Liesbet Van der Perre, Erik G. Larsson
Summary: In this study, an algorithm is proposed for detecting active devices in unsourced random access. These devices use a unique, non-orthogonal preamble known to the network before transmitting the payload data. Partial channel state information (CSI) is exploited to detect active users, and an iterative algorithm is used to estimate the activity and phase offset of each known device. The convergence and performance of the algorithm are evaluated for different qualities of partial CSI and signal-to-noise ratios.
2023 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE, WCNC
(2023)
Proceedings Paper
Automation & Control Systems
Guus Leenders, Gilles Callebaut, Liesbet Van der Perre, Lieven De Strycker
Summary: Multiple low power wide area networks (LPWANs) have been deployed to support various IoT applications, but they differ significantly in terms of quality-of-service, throughput, and energy efficiency. To achieve optimal coverage for all LPWAN use-cases, multiple networks can be combined into a multi-RAT solution. In the context of environmental monitoring in smart cities and remote landscapes, a multi-RAT platform is presented and shared, which collects and analyzes network parameters such as energy consumption and packet delivery ratio (PDR) for different LPWAN technologies. Preliminary measurements demonstrate the benefits of adopting a multi-RAT solution, including potential energy savings in various scenarios.
2023 IEEE 97TH VEHICULAR TECHNOLOGY CONFERENCE, VTC2023-SPRING
(2023)
