A5101492423- Advanced DC-DC Converters
- Multilevel Inverters and Converters
- Silicon Carbide Semiconductor Technologies
- Ideological and Political Education
- Building Energy and Comfort Optimization
- Aluminum Alloys Composites Properties
- Oil and Gas Production Techniques
- Dental Trauma and Treatments
- Advanced Welding Techniques Analysis
- Electric Motor Design and Analysis
- Tribology and Lubrication Engineering
- Gear and Bearing Dynamics Analysis
- Magnetic Bearings and Levitation Dynamics
- Advanced Algorithms and Applications
- Hydraulic and Pneumatic Systems
- Reservoir Engineering and Simulation Methods
- China's Ethnic Minorities and Relations
- Social and Cultural Dynamics
- Dental Radiography and Imaging
- Chinese history and philosophy
- Sensorless Control of Electric Motors
- Power Transformer Diagnostics and Insulation
- Contemporary Sociological Theory and Practice
- Engineering Technology and Methodologies
- Adhesion, Friction, and Surface Interactions
Nanjing University of Aeronautics and Astronautics
2023
Shenyang Jianzhu University
2022
Anhui University of Finance and Economics
2012-2014
Shanghai Institute of Science & Technology Management
2011
Daqing Oilfield General Hospital
2010
A hybrid resonant converter with a 1:1 turn-ratio autotransformer and two 2:1 transformers is proposed to achieve an 8:1 bus for 48V data-center power systems. Compared conventional converters, the turns losses of transformer windings are reduced. matrix PCB integrate into one magnetic core. As result, both volume core 40–60 V input, 5 V–7.5 V/200A output prototype designed tested. 3.5 kW/in <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...
In order to analyze the bearing wear in spindle system considering different speed and load conditions, a four-bearing was investigated. Two working Case I II, are considered. condition has lower higher external loads preload than II condition. Based on Archard model, new depth model of angular contact ball is presented which takes into account influence lubrication wear. The depths inner outer raceways for bearings calculated based motion parameters elements obtained by model. effects...
PCB-winding-based planar inductors have been widely adopted for the high frequency, power density, and efficiency conversion. Due to planarized structure of magnetics, position air gaps in a inductor not only dominates flux distribution magnetic core, but also impacts winding window. Therefore, both core loss are strongly related gaps. The window four-poles coupled critical-mode (CRM) Buck converter analyzed detail. An optimized with improved configuration is proposed reduce loss, as well...
The selection of measuring points is an important problem for the vibration monitoring transformers. paper analyses corresponding selecting principles. A series experiments were conducted in one 220kV transformer with fixed-frequency variable current. experimental results showed that should be placed on base windings and side wall tank. Another experiment was variable-frequency fixed-current. different exciting frequency choosing points. Finally, three principles summarized.
Aiming at a series of problems caused by the position sensor required salient pole permanent magnet synchronous motor (IPMSM) control system, high-frequency square wave injection sensorless algorithm suitable for IPMSM low-speed system is realized in this paper. Compared with other algorithms, its advantages are that it avoids delay filter injecting signal, and has good stability robustness low speed. The feasibility effectiveness method verified simulation. At same time, shows accuracy...
A high step-down ratio hybrid resonant converter is investigated for 48V data center power systems applications. The derived by integrating a switch-capacitor cell, an autotransformer, and LLC cell. High achieved easily while soft-switching of all switches can be guaranteed. output these circuit cells are in parallel, which makes the suitable lower voltage higher current high-density integration method further studied. Higher density efficiency through magnetic flux cancellation decoupling...
Abstract In view of the current heating situation in cuntryside, a new method is prosposed, which using solar to store thermal energy and skirting radiator dissipate. This article first calculates heat supply energy, then analyzes indoor temperature distribution by numerical methods. Numerical analysis shows that has certain feasibility. areas with abundant supplied collectors can support for more than hours continuous heating. The dissipation effect great, room evenly, there no obvious cold...