A5088631780- Multilevel Inverters and Converters
- Silicon Carbide Semiconductor Technologies
- Advanced DC-DC Converters
- Microgrid Control and Optimization
- Industrial Technology and Control Systems
- HVDC Systems and Fault Protection
- Induction Heating and Inverter Technology
- Advanced Surface Polishing Techniques
- Advanced Algorithms and Applications
- Smart Grid and Power Systems
- Spine and Intervertebral Disc Pathology
- Embedded Systems and FPGA Design
- Optical Network Technologies
- Semiconductor materials and devices
- Simulation and Modeling Applications
- Advanced Memory and Neural Computing
- Advanced machining processes and optimization
- Advanced Photonic Communication Systems
- Wireless Power Transfer Systems
- Thermal Analysis in Power Transmission
- Energy Harvesting in Wireless Networks
- Advanced Sensor and Energy Harvesting Materials
- Catalysis and Oxidation Reactions
- Advanced Physical and Chemical Molecular Interactions
- Stability and Controllability of Differential Equations
Union Hospital
2023-2025
Huazhong University of Science and Technology
2005-2025
Henan University
2018-2025
Hebei University
2024
China University of Mining and Technology
2019-2024
Shanghai Electric (China)
2024
University of Jinan
2024
Henan Academy of Sciences
2024
Sinopec (China)
2023
Anhui Agricultural University
2022
This paper proposes a novel dual-vector model predictive control (DV-MPC) method applied to modular multilevel converter(MMC). The traditional generally aim minimize the output current tracking error at next sampling instant, while proposed minimizes total harmonic distortion (THD) of by quantifying relationship between THD and trajectory within period. circulating is achieved selecting proper number inserted submodules (SMs) in upper lower arms. By appropriate SMs insert or bypass, voltage...
Abstract Background Growing evidence has suggested the role of stem cell‐derived small extracellular vesicles (sEVs) in intervertebral disc degeneration (IVDD). The cargo sorting sEVs, particularly miRNAs, may be influenced when donor cell is subjected to oxidative stress. Here, we discovered that miRNAs containing specific motifs are selectively sorted into intraluminal within mesenchymal cells (MSCs) response Methods Analysis miRNA cargoes sEVs derived from normal MSCs (C‐sEVs) or stressed...
Aiming at the short-circuit (SC) capability for silicon carbide (SiC) MOSFETs due to limitation of gate oxide process, that is, ability MOSFET withstand large current and high voltage when channel is turned on, this article summarizes analyses various SC fault types SiC MOSFETs, which are further simulated through a designed test platform with strict timing control signals. well-explored hard switching (HSF) under loading (FUL), connection between these two other faults derived, brings about...
This letter proposes a dual-vector model predictive control method to minimize the current total harmonic distortion (THD). The definition of THD shows that it is proportional area enclosed by actual and fundamental wave. lowest achieved minimizing reference in period. implemented on single-phase neutral-point clamped three-level pulsewidth modulation rectifier, advantages proposed are verified through experiments.
// Yu-Xiao Sun 1 , Chuan-Yu Gao 2 Yang Lu 3 Xin Fu 4 Jun-Ge Jia Yu-Jie Zhao Lian-Dong Li Hong-zhi Dui Xing-Yu Zhang Zhi-Ying Lei Wei-Feng Yi-Qiang Yuan Department of Cardiology, The Seventh People’s Hospital, Zhengzhou, Henan, 450016, China Henan Provincial 450000, Medicine, Xi’an Jiaotong University, Xi’an, Shaanxi 710061, First Affiliated Hospital Zhengzhou 450052, Correspondence to: Sun, email: syxxjb@163.com Yuan, yiqiangyuan@163.com Keywords: coronary heart disease...
The overheating stress of power devices is the main cause converter system failures, so real-time temperature acquisition, as well timely over-temperature protection, under various operating conditions are key to achieving a more reliable energy conversion. In this paper, an improved three-dimensional (3-D) coupled thermal model for insulated gate bipolar transistors (IGBTs) and related heatsink constructed by considering coupling effects at both device- module level. Furthermore, impedance...
The application of the Z-source/quasi-Z-source inverter exacerbates hazard common mode voltage in motor drives or photovoltaic systems. existing reduced common-mode pulse width modulation (RCMV-PWM) technique applied to has solved problem suppression a certain extent, but its switching losses have not been optimized. In this paper, Active zero-state PWM (AZSPWM) and remote state (RSPWM) strategies quasi-Z-source inverters are analyzed, new loss optimized reduction strategy is proposed. This...
This article proposes a new optimal switching sequence model predictive control method for modular multilevel converter (MMC). In this method, the common mode voltage is considered, which makes more accurate. The proposed realizes optimization of multiple objectives output current tracking, circulating suppression, and SM balancing. that allows to track its reference value calculated in <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML"...
<List><ListItem><ItemContent> ● Agricultural innovation is a coevolution process of hardware, software and orgware. </ItemContent></ListItem> <ListItem><ItemContent> Innovation intermediaries important for the agricultural innovation. The roles STBs have evolved from knowledge broker to broader intermediary at village level. Facilitating orgware more effective than enabling in promoting farmers’ adoption improved tillage practice. Collaboration between individual needed support larger scale....
Here, we demonstrate transparent and conductive W-doped ZnO (WZO)/Cu/WZO multilayer films as source/drain (S/D) electrodes for metal-oxide thin-film transistors (TFTs). The effect of the Cu interlayer thickness on electrical optical properties was first investigated. Optimized WZO/Cu/WZO with an excellent sheet resistance 4.1Ω/sq. average transmittance 81.7% in visible range were obtained employed S/D electrodes. Compared indium-gallium-zinc oxide (IGZO) TFTs or WZO electrodes, exhibit much...
In this paper, a finite control set model predictive direct power (FCS-MPDPC) method based on satisfactory optimization, for single-phase three-level PWM rectifier, is proposed to achieve global optimization that takes into account all its objectives and constraints. Satisfaction aims obtain the solution after coordination of multiple goals, instead optimal single goal. By replacing "optimal" with "satisfaction", more degrees freedom are acquired, so low-priority auxiliary can participate in...
The wearout and failure of power module converter equipment are mainly caused by temperature factor, so real-time accurate junction estimation is vital importance, which beneficial to realize more reliable economical energy conversion. In order obtain the detailed distribution key nodes inside converter, thermal coupling effects different levels considered in this paper, a complete three-dimensional (3-D) coupled network model for three-level IGBT established obtaining equivalent RC...
Three-level neutral-point-clamped (NPC) inverters have been widely applied in power conversion device occasions of medium high voltage and power, and, most recently, increasing the low-voltage low-power applications. The three-level problems low frequency ripple that appears neutral-point (NP) DC-link under some operating conditions because its unique structure limitations existing modulation methods. Low NPC inverter PWM rectifier technology is an important problem. Conventional...
Open Neural Network Exchange (ONNX) is an open format to represent AI models and supported by many machine learning frameworks. While ONNX defines unified portable computation operators across various frameworks, the conformance tests for those are insufficient, which makes it difficult verify if operator's behavior in backend implementation complies with standard. In this paper, we present first automatic unit test generator named Sionnx verifying compliance of implementation. First,...
The heat dissipation problem is the key to restrict capacity and reliability of high-power converters. In this paper, aiming at air-cooled system neutral-point clamped (NPC) three-level converter with specific radiator structure, thermal impedance parameters are extracted by using finite-element method (FEM), overall three-dimensional (3-D) coupling network model thereby established. Both effects between different power device chips insulated gate bipolar transistor (IGBT) modules...
In this paper, a new control method for modular multilevel converters(MMCs) is proposed. The inner-loop circulating current using model predictive controller instead of traditional PI controller. controlling method, the reference voltage vector obtained firstly according to load current, which primary objective. Then, equivalent number submodules(SMs) that should be inserted in next sampling period determined based on principle minimum deviation submodules. Finally, adjusted suppress...