A5043070186- Advanced DC-DC Converters
- Multilevel Inverters and Converters
- Silicon Carbide Semiconductor Technologies
- Microgrid Control and Optimization
- HVDC Systems and Fault Protection
- Induction Heating and Inverter Technology
- Railway Engineering and Dynamics
- High voltage insulation and dielectric phenomena
- Advanced Battery Technologies Research
- Traffic Prediction and Management Techniques
- Electromagnetic Compatibility and Noise Suppression
- High-Voltage Power Transmission Systems
- Image Enhancement Techniques
- Electrical Fault Detection and Protection
- Infrastructure Maintenance and Monitoring
- Vehicle License Plate Recognition
- Growth Hormone and Insulin-like Growth Factors
- Gear and Bearing Dynamics Analysis
- Photovoltaic System Optimization Techniques
- Physics and Engineering Research Articles
- Elevator Systems and Control
- Wireless Power Transfer Systems
- Simulation and Modeling Applications
- Advanced Measurement and Detection Methods
- Fibroblast Growth Factor Research
Tongji University
2021-2025
Shanghai Tenth People's Hospital
2025
Jinan University
2020-2024
Zhejiang University
2018-2023
Beijing Normal University - Hong Kong Baptist University United International College
2021
Shanghai Tunnel Engineering Rail Transit Design & Research Institute
2020
University of Jinan
2020
This paper proposes a novel zero-voltage-switching (ZVS) three-phase four-wire back-to-back (BTB) converter topology and its ZVS sinusoidal pulsewidth modulation (ZVS-SPWM) scheme. With the proposed ZVS-SPWM scheme, all main switches in both rectifier side inverter auxiliary switch can realize turn on with only one circuit. In addition, needs to operate once each switching period, which cut down an extra loss of The operation stage analysis is introduced, condition for derived. BTB...
A general PWM method for soft-switching three-phase power converters-Edge Aligned (EA-PWM) is proposed. It aligns all the high loss commutation instants of converter bridges in a switching cycle at same instant so that switches can realize zero-voltage-switching (ZVS) with help resonant auxiliary circuit which operates once each cycle. EA-PWM scheme ZVS active-clamping introduced. condition and voltage stress converters derived. adapt to various modulation methods such as SPWM, Harmonic...
For increasing power density and other performance of T-type three-level inverters, the soft-switching technique is studied. This article proposes a novel zero-voltage switching (ZVS) PWM scheme for active clamping three-phase which can realize ZVS operation all switches reduce loss. The proposed evolved from discontinuous modified requirements inverter. It enables switches, including main auxiliary operate at fixed frequency. However, larger current on semiconductor devices occurs 60° zone...
Power electronic conversion plays an important role in flexible AC or DC transmission and distribution systems, integration of renewable energy resources, storage systems to enhance efficiency, controllability, stability, reliability the grid. The efficiency power are critical system applications. One way is soft-switching technology. This paper introduces a generic zero-voltage-switching (ZVS) technique based on silicon carbide (SiC) device. Using proposed ZVS technique, all semiconductor...
In this article, the generic analysis and design of zero-voltage-switching (ZVS) multiphase ac/dc converters are proposed. With edge aligned pulsewidth modulation (PWM) (EA-PWM) scheme, all switches ZVS can realize operation. Besides, switching frequency is fixed auxiliary switch only operates once in each period. Its operation stages a cycle analyzed condition derived. Based on proposed theory, two-stage three-phase photovoltaic (PV) inverter investigated, which regarded as five-phase...
Universal zero-voltage-switching (ZVS) technique for multi-phase AC/DC converter is proposed. With the proposed technique, all switches of can realize ZVS operation by using one auxiliary circuit. A ZVS-SPWM scheme introduced. The principle and stage analysis are presented. Generic condition derived according to equivalent resonant circuits. Next, design guideline parameters Finally, a four-phase called single-phase back-to-back (BTB) investigated as an example prototype set up validate...
Fundamental of Edge Aligned PWM (EA-PWM) for soft-switching three-phase power converters is presented. It aligns all the high loss commutation instants converter bridges in a switching cycle at same instant so that switches can realize zero-voltage-switching (ZVS) with help resonant auxiliary circuit which operates once each cycle. EA-PWM scheme ZVS active-clamping introduced. condition and voltage stress derived. adapt to various modulation methods such as SPWM, Harmonic Injected Continuous...
Deep learning (DL) models are piquing high interest and scaling at an unprecedented rate. To this end, a handful of tiled accelerators have been proposed to support such large-scale training tasks. However, these often incorporate numerous cores or tiles even extending wafer-scale, substantial on-chip bandwidth, distributed memory systems. This results in exceedingly complex design space. Moreover, conducting actual experiments find optimal configurations is impractical due time constraints....
In recent years, modern tramcar has developed rapidly. The grooved rail is used widely in its main line track. However, at present, the detection method of geometric parameters manual detection, with low working efficiency. Therefore, this paper proposes a set dynamic system irregularity based on inertial reference method, which can realize such as longitudinal irregularity, alignment etc. On basis previous work, improvement & application measuring and been proposed. key points improved...
A novel zero-voltage-switching (ZVS) three-phase T-type inverter and its control scheme are proposed, which can realize ZVS operation of all switches. The principle the proposed is analyzed. Furthermore, condition derived voltage stress Finally, verified by simulation.
An audio noise-free Uninterruptible Power Supply (UPS) with Zero-Voltage-Switching (ZVS) back-to- back (BTB) converter is proposed. Firstly its ZVS sinusoidal pulse width modulation (SPWM) scheme introduced. Using the proposed ZVS-SPWM scheme, all switches in both rectifier side and inverter as well auxiliary switch can realize turn-on only one commonly shared circuit. Besides, needs to operate once each switching period, which reduce extra loss caused by The conditions respect balanced...
At present, with the rapid development of trams, most tracks adopt groove rails. However, methods for dynamic detection geometric parameters rails in market inertial reference method or three-point chord measurement method, whose requirement installation sensors is high, selection points not reasonable enough and parameter accuracy high enough. In thesis, a new algorithm based on four-point laser triangulation principle developed which uses to obtain track contour data, so as realize...
For large power DC loads such as data centers, EV charging stations, light rail, etc., the medium-voltage-connected supply is promising since it eliminates utility-frequency transformers, reduces conversion stages and distribution loss has a smaller size. In this paper, front-end AC/DC stage of investigated. Five converter circuits are compared with respect to efficiency density by optimizing switching frequency, filter inductor heat sink.
With the rapid development of high voltage power semiconductor devices, medium-voltage-connecting (MVC) supply with frequency isolation is expected to demonstrate its advantage in efficiency and density. In this paper, state-of-the-art MVC for data centers briefly reviewed. Power conversion structures 10 kVac/270 Vdc are investigated terms efficiency, circuit complexity, volume.
Due to the voltage limitation of power semiconductor devices, medium-voltage-connected supply systems generally use cascaded conversion cell structure. To increase density, a single-phase five-level AC/DC converter for interfacing 10 kV medium-voltage is proposed. The circuit and control principle are introduced. Besides, down-scaled prototype built experimental results bidirectional operation given verify principle.
In order to solve the problems of long monitoring cycle and low degree intelligence in traditional disc suspension insulator deterioration monitoring, this paper uses improved YOLOX neural network for its breakage defect target detection. The structure is improved, loss function modified, attention mechanism added seek optimal weight running speed prediction accuracy. training effect by expanding image dataset. Considering characteristics low/zero defects insulators, such as strong...
Three-phase four-wire rectifiers with a balancing leg are often used as front-end converters in uninterruptible power supplies (UPS). The integration of minimum-voltage active-clamping (MVAC) to these is proposed. With the proposed Zero-Voltage-Switching Sinusoidal PWM (ZVS-SPWM) scheme, ZVS operation for all semiconductor devices rectifier realized. conditions under balanced and unbalanced load derived. Then voltage current stress switching auxiliary circuit compared...