A5100340650- Wireless Power Transfer Systems
- Energy Harvesting in Wireless Networks
- High-Temperature Coating Behaviors
- RFID technology advancements
- Nuclear Materials and Properties
- Catalytic Processes in Materials Science
- Advanced DC-DC Converters
- Machine Fault Diagnosis Techniques
- Underwater Vehicles and Communication Systems
- Smart Grid and Power Systems
- Anomaly Detection Techniques and Applications
- High-Voltage Power Transmission Systems
- Wireless Body Area Networks
- Advanced materials and composites
- Advanced Decision-Making Techniques
- Power System Reliability and Maintenance
- Metal and Thin Film Mechanics
Xidian University
2019-2024
China Southern Power Grid (China)
2015-2022
State Grid Corporation of China (China)
2022
In high-frequency wireless power transfer (WPT) applications, Class D, E, and F inverters are most widely used. DE combine the respective advantages of D E inverters. However, inverter is sensitive to changes in impedance, which can easily lead loss soft switching characteristics, thereby reducing efficiency. this paper, an impedance-matching compensation design method proposed expand high-efficiency region by matching impedance parameters. The effect on zero-voltage (ZVS) characteristic...
Coaxial coupled structure of wireless power transfer, applied to high-precision instruments in aerospace, can eliminate interference sources by spatial isolation. For the optimization electromagnetic structure, a C-shaped magnetic is presented for both shielding simulation and improving coupling. By comparing spiral coaxial structures, an analysis validated effect positional offset on inductive coupling, voltage gain, efficiency. To obtain stable sufficient supply, prototype implemented...
The Internet of Things (IoT) connects billions smart devices through wireless sensor networks (WSNs). However, to ensure the power supply for numerous passive in a WSN, it is necessary replace batteries periodically, which will undoubtedly increase maintenance costs. This study proposes capacitive coupling structure that different from previous transfer (CPT) structures. proposed can allow positional variation receiver, and multiple receivers be charged at same time. Both theoretical...
A 6.78-MHz wireless power transfer (WPT) system can achieve a long transmission distance, which is based on magnetically coupled resonant technology. Due to its high quality factor coils, the performance greatly affected by position displacement. In this paper, weakly and distance-insensitive WPT with dual-coupled L-type matching network was proposed. To improve displacement tolerance, proposed used dual mutual inductance network, did not require feedback change capacitance or dynamically....
The conductor material properties such as resistivity and relative permeability have great influence on impulse grounding resistance of grids in regular dimensions.The intensity the is also different under soil conditions.By building a 1:1 model using moment method, paper gets huge amount numerical calculation results electromagnetic environment an current attack.Based these results, resistivity, similar conditions are discussed.The final part this gives ground potential rise distribution...
The fault current through ground grid would cause maldistribution of potential rise, with the harm transfer between substation and outside concerned about more than Substation Interior Transfer Potential. Taking two events lawn fire in 220kV Enping for example, by calculating transient rise distribution inner during 110kV Entian Line single phase substation, we point out interior form a high difference, there brings risk spark discharge if conductors are close enough. solution against is...
The standard-delay actuating characteristic of miniature circuit breaker is one the routine tesing items breaker. accuracies stations on device directly determine test result. potential abnormal station can not be found in time by regular maintenance and repair. In view this, After using its data studing principle identification, an identification method put forward. DF-LIPF values, defined this method, are calculated standard -delay then eigenvectors constructed. Finally, identified...