Wireless Power Transfer Research Articles

Analysis and implementation of variable frequency controlled dynamic wireless charging system with half-bridge multi-leg converter topology

Resonant Inductive Power Transmission (RIPT) represents a cutting-edge Wireless Power Transfer (WPT) technology, emerging as a secure and practical solution for charging electric vehicles (EVs). While Dynamic Wireless Charging Systems (DWCS) reduce the need for large batteries compared to static charging, they entail higher initial investments. This study introduces an innovative approach to DWCS utilizing a half-bridge-based multi-legged inverter configuration. Each leg of the inverter functions independently for a transmitter coil, effectively reducing overall system costs. In this method, the Variable Frequency Control Technique (VFCT) is introduced in half-bridge DWCS with S-S and LCC-S compensations. Analyzed its VFCT on the DWCS. In addition, explores the impact of square and rectangular coils on the proposed approach, coupled with an analysis of coil gaps’ effects on receiving power. Through an exploration of the half-bridge multi-legged DWCS and a comprehensive evaluation of coil gap and size influences, this study provides valuable insights for optimizing RIPT technology to achieve efficient and cost-effective EV charging.

Short-circuit current suppression strategy for inverter in LCC-S compensation wireless power transfer system

Short-circuit current suppression strategy for inverter in LCC-S compensation wireless power transfer system

RF Energy-Harvesting Techniques: Applications, Recent Developments, Challenges, and Future Opportunities

The increasing demand for sustainable and renewable energy solutions has made radio frequency energy harvesting (RFEH) a promising technique for powering low-power electronic devices. RFEH captures ambient RF signals from wireless communication systems, such as mobile networks, Wi-Fi, and broadcasting stations, and converts them into usable electrical energy. This approach offers a viable alternative for battery-dependent and hard-to-recharge applications, including streetlights, outdoor night/security lighting, wireless sensor networks, and biomedical body sensor networks. This article provides a comprehensive review of the RFEH techniques, including state-of-the-art rectenna designs, energy conversion efficiency improvements, and multi-band harvesting systems. We present a detailed analysis of recent advancements in RFEH circuits, impedance matching techniques, and integration with emerging technologies such as the Internet of Things (IoT), 5G, and wireless power transfer (WPT). Additionally, this review identifies existing challenges, including low conversion efficiency, unpredictable energy availability, and design limitations for small-scale and embedded systems. A critical assessment of current research gaps is provided, highlighting areas where further development is required to enhance performance and scalability. Finally, constructive recommendations for future opportunities in RFEH are discussed, focusing on advanced materials, AI-driven adaptive harvesting systems, hybrid energy-harvesting techniques, and novel antenna–rectifier architectures. The insights from this study will serve as a valuable resource for researchers and engineers working towards the realization of self-sustaining, battery-free electronic systems.

Adaptive secure wireless information and power transfer in delay-constrained multiuser multi-input single-output networks

Adaptive secure wireless information and power transfer in delay-constrained multiuser multi-input single-output networks

Adaptive electronics for photovoltaic, photoluminescent and photometric methods in power harvesting for wireless wearable sensors

The increasing demand for continuous, comprehensive physiological information captured by skin-interfaced wireless sensors is hindered by their relatively high-power consumption and the associated patient discomfort that can follow from the use of high capacity batteries. This paper presents an adaptive electronics platform and a tri-modal energy harvesting approach to reduce the need for battery power. Specifically, the schemes focus on sensors that involve light in their operation, through use of (i) photometric methods, where ambient light contributes directly to the measurement process, (ii) multijunction photovoltaic cells, where ambient light powers operation and/or charges an integrated battery, and (iii) photoluminescent packaging, where ambient light activates light-emitting species to enhance the first two schemes. Additional features of interest are in (i) in-sensor computational approaches that decrease the bandwidth and thus the energy consumption in wireless data communication and (ii) radio frequency power transfer for battery charging. These ideas have utility across broad other classes of wearable devices as well as small, portable electronic gadgetry.

Efficient Metamaterial-Integrated Radiative Near-Field Wireless Power Transfer System for Scalp-Implantable Devices in IoMT Applications

Efficient Metamaterial-Integrated Radiative Near-Field Wireless Power Transfer System for Scalp-Implantable Devices in IoMT Applications

Utilizing Voltage Transients to Identify Mutual Inductance and Load Voltage of Wireless Power Transfer System

Utilizing Voltage Transients to Identify Mutual Inductance and Load Voltage of Wireless Power Transfer System

Energy-Efficient UAV-Based Data Collection 3-D Trajectory Optimization With Wireless Power Transfer for Forest Monitoring

Energy-Efficient UAV-Based Data Collection 3-D Trajectory Optimization With Wireless Power Transfer for Forest Monitoring

A Retrodirective Tracking Wireless Power Transfer System for Moving and Multiple Electronic Devices

A Retrodirective Tracking Wireless Power Transfer System for Moving and Multiple Electronic Devices

Focusing Microwave Radiation for Long-Distance Wireless Power Transfer in Space

Focusing Microwave Radiation for Long-Distance Wireless Power Transfer in Space

An energy-focused model for batteryless IoT: Vortex wireless power transfer and fog computing in 6 G networks

An energy-focused model for batteryless IoT: Vortex wireless power transfer and fog computing in 6 G networks

Illumination Design for Near field Joint Imaging and Wireless Power Transfer Systems

Illumination Design for Near field Joint Imaging and Wireless Power Transfer Systems

Analysis-based Design of Class-E<sup>2</sup> Wireless Power Transfer System with Parasitic Components of Switching Devices at Any Duty Ratio

Analysis-based Design of Class-E<sup>2</sup> Wireless Power Transfer System with Parasitic Components of Switching Devices at Any Duty Ratio

Multifrequency Resonant Compensated Wireless Power Transfer SRM Drive System

Multifrequency Resonant Compensated Wireless Power Transfer SRM Drive System

Exact Calculation of Leakage Magnetic Field for Wireless Power Transfer in 85-kHz Band

Exact Calculation of Leakage Magnetic Field for Wireless Power Transfer in 85-kHz Band

Greenhouse Gas Emission Evaluation Including Infrastructure for Passenger Electric Vehicles with Dynamic Wireless Power Transfer

Greenhouse Gas Emission Evaluation Including Infrastructure for Passenger Electric Vehicles with Dynamic Wireless Power Transfer

Power Boosting of Strongly Coupled Wireless Power Transfer Systems by Aligning 1st/3rd Harmonic Frequencies With Splitting Frequencies

Power Boosting of Strongly Coupled Wireless Power Transfer Systems by Aligning 1^st/3^rd Harmonic Frequencies With Splitting Frequencies

A Repeater-Based Dynamic Wireless Power Transfer System With Controllable Detuning Rate for a Constant Output Profile

A Repeater-Based Dynamic Wireless Power Transfer System With Controllable Detuning Rate for a Constant Output Profile

Design and Control Methods for Electric Vehicle Charging in Wireless Power Transfer Topologies

Design and Control Methods for Electric Vehicle Charging in Wireless Power Transfer Topologies

Automatic Wireless Vehicle Charging System Using Solar Energy

The global transition to electric vehicles (EVs) necessitates robust, efficient, and sustainable charging infrastructure. This paper presents a comprehensive analysis of automatic wireless vehicle charging systems integrated with solar energy, addressing the critical need for eco-friendly and convenient EV power solutions. The fundamental principles of wireless power transfer (WPT) technologies, including inductive, resonant, and capacitive coupling, are explored, highlighting their suitability and limitations for EV applications. The integration of solar energy is examined, detailing photovoltaic conversion, energy storage mechanisms, and the overall system architecture that enables seamless, grid-independent charging. Key technical challenges such as power transfer efficiency, coil misalignment, foreign object detection (FOD), and electromagnetic interference (EMI) are discussed, alongside proposed mitigation strategies. The paper further investigates the crucial role of smart grid integration and Vehicle-to-Grid (V2G) capabilities in enhancing grid stability and energy management. Current global research, pilot projects, and commercial initiatives demonstrate the accelerating maturity of this technology. While offering significant advantages in environmental impact, energy independence, and user convenience, solar-powered wireless EV charging systems face hurdles related to initial costs, efficiency losses, and land use. The future outlook points towards advanced materials, artificial intelligence (AI)-driven optimization, and standardized protocols as pivotal for widespread adoption, paving the way for a cleaner, more resilient, and sustainable transportation ecosystem.