A5049266767- Superconducting Materials and Applications
- Electric Motor Design and Analysis
- Magnetic Bearings and Levitation Dynamics
- Magnetic Properties and Applications
- Particle accelerators and beam dynamics
- Semiconductor materials and devices
- Electromagnetic Simulation and Numerical Methods
- Particle Accelerators and Free-Electron Lasers
- 2D Materials and Applications
- Numerical methods in engineering
- Thin-Film Transistor Technologies
- Advancements in Semiconductor Devices and Circuit Design
- Magnetic confinement fusion research
- Sensorless Control of Electric Motors
- Ferroelectric and Negative Capacitance Devices
- Advanced Memory and Neural Computing
- Physics of Superconductivity and Magnetism
- Quantum and electron transport phenomena
- Advanced Numerical Methods in Computational Mathematics
- Graphene research and applications
- MXene and MAX Phase Materials
Peking University
2024
Huazhong University of Science and Technology
1994-2023
Wuhan National Laboratory for Optoelectronics
2023
A method is proposed for predicting the flux-weakening performance of permanent-magnet (PM) brushless ac machines accounting skew and d-q axis cross-coupling. The based on a d-q-axis flux-linkage model, hybrid 2-D finite-element (FE)-analytical being used to predict d- q-axis inductances. However, it only requires FE analysis magnetic field distribution over cross section machine. developed torque-speed characteristic an interior PM machine with one stator slot-pitch skew. This compared...
The performance of a 70 T pulsed magnet with internal and external reinforcement is simulated an advanced finite element method. discharge analysis, thermal analysis stress are calculated the 'coupled field analysis' scheme for ANSYS model 'voltage-fed stranded coil'. results show that technique useful tool design magnets. These compared to obtained by simple one-dimensional codes, respective advantages both methods pointed out. Data from recently tested high coil given; test in good...
In this work, we investigate the reliability and stability of short-channel indium tin oxide (ITO) field-effect transistors through 1/f noise characterization at elevated temperature with positive bias instability (PBTI). The behavior a 60-nm-long channel ITO transistor can be described by carrier number fluctuation model, suggesting that trapping de-trapping trap states within 5 nm thin high-κ HfLaO dielectric are dominant mechanisms affecting noise. Small threshold voltage shifts 0.042...
The magnetic field in a DC permanent magnet coreless disc machine is studied depth by using different methods, such as three dimensional finite element method (3DFEM), two (2DFEM) and circuit (MCM) based on an analytical solution. For optimization, the cases for dimensions, airgap lengths configurations are investigated detail. Numerical results show that if provided ferrite magnets, ratio of thickness to length should be greater than 3 distance from stator wall or width magnetism-free...
Without 3D analysis, the longitudinal distribution of magnetic field in a drum-type electric machine can be determined two-dimensionally, provided that radial results, fundamental components air gap flux density related to each axially-separated part, are obtained advance by any conventional 2D numerical method. Details on new approach, including how bound domain, represent problem and solve it, presented. As an application, type synchronous with two-part rotor, having surface permanent...
The stresses in pulsed magnet are calculated with a design software (PMDS) package developed Visual Basic 6. Stress model includes elastic and plastic deformation. solution is given by Hooke's law total strain theory. Prototype of 70 T coil was made. windings were composed two sections. In the inner section, four CuNb conductor layers reinforced independently Zylon epoxy composites. outer soft copper insulated glass fibre thick carbon layer. thickness reinforcing optimized to distribute...
An edge-nodal coupled method, which uses edge elements in the eddy current region and nodal finite non-eddy to discretize H model, is presented for solving 3D problems. The mathematical models are divided into "strong" form "weak" model. Special treatment on interface presented. test results shown validity of proposed algorithm.
Two-dimensional transition-metal dichalcogenides (TMDCs) have been pursued for high-performance logic electronic devices, and compatibility with silicon complementary metal-oxide-semiconductor (CMOS) technology is essential. Thus, high-quality material synthesis at reduced temperature a key challenge TMDC integration the back-end-of-line CMOS. In this work, TMDCs synthesized temperatures down to 450 °C on SiO2/Si substrates via chemical vapor deposition. This work highlights necessity of...