A5100352033- Wireless Power Transfer Systems
- Advanced DC-DC Converters
- Energy Harvesting in Wireless Networks
- Advanced Battery Technologies Research
- Supercapacitor Materials and Fabrication
- Electric and Hybrid Vehicle Technologies
- Non-Destructive Testing Techniques
- Wireless Body Area Networks
- Metal and Thin Film Mechanics
- Electrochemical sensors and biosensors
- Integrated Circuits and Semiconductor Failure Analysis
- Advanced Memory and Neural Computing
- Multilevel Inverters and Converters
- Analytical Chemistry and Sensors
- Conducting polymers and applications
- Induction Heating and Inverter Technology
- Acoustic Wave Resonator Technologies
China University of Mining and Technology
2022-2024
Xi'an University of Technology
2023
Semiconductor Manufacturing International (Italy)
2010
Baoding People's Hospital
2008
Mid-range wireless power transfer (WPT) system for consumer electronics has been hamstrung by modest energy efficiencies and low misalignment tolerance. As the increase in distance, increasing leakage magnetic flux between transmitting (Tx) coil receiving (Rx) will deteriorate performance. In this paper, a novel optimization-based design method of passive array coils (PACs) is presented order to maximize efficiency (PTE) improve tolerance WPT system. A modified multiobjective genetic...
Aiming at the problems that existing multifrequency and multiload (MFML) magnetic coupling resonant wireless power transfer (MCR-WPT) systems either output frequencies are limited, or a large amount of reactive in them leads to decrease factor (PF), this paper proposes MFML MCR-WPT system based on hysteresis current (HC) control, which controls superposition has equivalent source characteristics. The outputs by tracking command current, consists subcommand currents designed according load...
Supercapacitors can provide the transient power that cranking need in low temperature. Aiming to reduce volume of lead acid battery and cost system, supercapacitor hybrid systems are investigated as sources for diesel engine cold starting by using test road test. This paper focuses on requirement capacitance effective series resistance system. Different combinations batteries supercapacitors tested suitable solution. The lab result proves internal is key enhance capacity. experiment final...
In order to reduce the reactive power of existing hybrid modulation pulsewidth (HM-PWM)-controlled multifrequency and multiload wireless transfer (MFML WPT) system without a resonant network, design idea variable network is proposed, accordingly, an HM-PWM-controlled MFML WPT based on studied. According variation in load frequency, output frequency inverter can change accordingly. First, structure working principle are introduced. Second, taking dual-frequency as example, control method...
In this paper, a single-phase 1kW off-line inverter under critical conduction mode (CRM) with high switching frequency using 650V GaN devices is studied, designed, and tested. For CRM full-bridge inverters unipolar modulation strategy, if the output voltage value of less than half its input, drain to source would only resonate some valley point. So zero-voltage-switching (ZVS) cannot be achieved within full range, meanwhile power loss often generated on instant following active switch....
A structure with 70μm space between two Ag bulks was designed to evaluate the reliability performance of micro-electro-mechanical structure. THB (Temperature Humidity Bias), 85°/85%RH (Relative Humidity) 4.0V DC bias, used as environmental test conditions. SEM (Scanning Electron Microscope) and EDX (Energy Dispersive X-ray Detector) analysis showed that migration over isolating induced about hundreds times leakage current increase after 200-hr 500-hr stress. Chlorine element also found in...