A5008061049- Multilevel Inverters and Converters
- Silicon Carbide Semiconductor Technologies
- Advanced DC-DC Converters
- Heat Transfer and Optimization
- Petroleum Processing and Analysis
- HVDC Systems and Fault Protection
- Advanced Computational Techniques and Applications
- Civil and Geotechnical Engineering Research
- Turbomachinery Performance and Optimization
- Advancements in Semiconductor Devices and Circuit Design
- Enhanced Oil Recovery Techniques
- Semiconductor materials and devices
- Fluid Dynamics and Mixing
- Offshore Engineering and Technologies
- Spacecraft and Cryogenic Technologies
- Electric Motor Design and Analysis
- Geotechnical Engineering and Underground Structures
- Induction Heating and Inverter Technology
- Grey System Theory Applications
- Engineering Diagnostics and Reliability
- Drilling and Well Engineering
- Microgrid Control and Optimization
Wuhan University
2022-2024
Southwest Petroleum University
2011-2023
Demanding accuracy and reliability of thermal design for high efficiency high-power density inverter devices.Integrating heat conduction, convection transfer fluid dynamics theories, a synthetical model based on the characteristic length as square root cross-sectional area multi-objective optimization method entropy yield minimization theory electrothermal coupling are proposed typical forced air-cooling heatsink system to improve optimizations in structure cost.The fin thickness, length,...
A novel high step-down DC/DC converter is presented, and its operating characteristics design principles of significant component parameters are described to meet the requirements low-voltage high-current power supply module in data centers. The a quasi-parallel Sigma structure made up LLC PCL-Buck. Every switch topology operates soft switching state. accuracy system's steady-state measurements capacity for dynamic response significantly increased by closed-loop control optimization...
The bootstrap gate driver circuits are widely used for bridge-arm-type high-current and high-power-density converters due to their low cost compact structures. In applications, improper parameters circuit design will cause start-up gate–source voltage oscillation, bridge-arm shoot-through, overshoot. Because of the lack research detailed model on above three aspects in this article proposes a full-parameter through analysis summarizes set systematic methods, which provides reference Si-based...
Crossing by Horizontal Directional Drilling (HDD), characterized short construction period, high quality and little impact on environment, is widely used in pipeline crossing engineering. Deviation between the practical theoretical exit point, where bit unthreads, difficult to control. Excessive deviation could not only cause unconformity of requirement, but also expand correction make re-drilling more difficult. In sum, accurate controlling drilling direction key success crossing....
Wax deposition seriously affects the safe and economic operation of pipelines. Mastering variation laws wax thickness is premise formulating reasonable pigging schemes. Although GM (1,1) model (a kind gray model) an effective method for predicting on pipe walls, its prediction accuracy easily affected by smoothness original sequence. The improved was established introducing idea translation transformation, optimal weighted combination based traditional a logarithmic function proposed....
In this paper, a quad active bridge converter for modular photovoltaic inverters is analyzed, which able to realize the AC/DC power decoupling in magnetic circuit without increasing size of transformer. Besides, ripple-suppression control strategy proposed suppress voltage ripples caused by unavoidable parasitic resistance and leakage inductance, so that bus capacitance can be minimized. Meanwhile, on basis structure, decentralized system architecture presented constitute controller...
The modulation strategy based on carrier reconstruction usually achieves low harmonic distortion of inverter output line voltage and balanced power each unit at the expense high switching frequency. This paper proposes an improved reconstruction. By adjusting arrangement traditional phase-disposition carriers in horizontal direction, a new is reconstructed to avoid additional operations caused by mutations instantaneous value vertical direction. first deduces average expression module...
Demanding the accuracy and reliability of thermal design high-power density inverter, aluminum substrate has been widely used due to its high conductivity well insulation performance. This paper provides a complete set optimization method: The main power module losses are analyzed. Considering accurate resistance models for heatsink variable structural types is hard modelling, method combining finite element simulation Minitab response surface mainly carry out multi-objective with thickness,...