Results 51 to 60 of about 4,334 (147)

Robust Model Predictive Control for DAB Converters Using Extended Phase Shift Modulation With Minimum Backflow Power and ZVS Design

IEEE Access
This paper introduces a method for deriving an optimal closed-form solution for extended phase shift (EPS) control of a dual active bridge (DAB) DC-DC converter, capable of achieving both minimum backflow power (MBP) and zero-voltage switching (ZVS ...
Nguyen Ngoc Nam, Dong Hun Lee, Young Il Lee   +2 more
doaj   +1 more source

Experimental and theoretical study of the smoke back-layering length in a tunnel with cross-passage: effects of longitudinal fire source locations

Railway Engineering Science
The diversion effect caused by the linked structure in a metro tunnel with cross-passage complicates the impact of longitudinal fire source location on the smoke backflow layering behavior that has not been clarified, despite the fact that the scenario ...
Zhisheng Li, Yuchun Zhang, Maozhen Qiao, Yunji Gao, Yule Huang   +4 more
doaj   +1 more source

Research on the distribution structure of 2D piston electro-hydraulic pump based on fluid-structure interaction

Advances in Mechanical Engineering
To address the drawbacks of traditional hydraulic power units, we embedded a 2D piston pump inside the motor rotor, proposing a 2D piston electro-hydraulic pump.
Xin-Guo Qiu, Kui-Ge Chen, Ping Wu, Ying Zheng, Chen Wang, Xing-Jian Ji   +5 more
doaj   +1 more source

Numerical research on the influence of ventilation velocity on fire smoke distribution in bifurcated roadway

Meikuang Anquan
In order to investigate the influence of ventilation velocity on fire smoke distribution in bifurcated roadway, the computational fluid dynamics (CFD) numerical method was adopted to simulate the fires located in upstream of main-roadway.
Cui DING
doaj   +1 more source

An Enhanced Fault Ride‐Through Control Method of the VSG Based on Dynamic Power Compensation

IET Power Electronics
Virtual synchronous generators (VSGs) based inverters have been widely applied for active frequency and voltage support. However, when the grid encounters unexpected large disturbances, like voltage drops, the power electronic components of the inverters
Xueqing Li, Xibo Yuan, Kai Wang, Yonglei Zhang, Xiang Guo, Xiangkui Hao   +5 more
doaj   +1 more source

Influence of Heat Exchanger Structure on System Performance in Trans-Critical CO₂ Heat Pump Air Conditioning Systems for Trains

Zhileng xuebao
To further study the influence of heat exchanger structures on system performance and overall power consumption in transcritical CO2 heat pump air conditioning systems for high-speed trains to improve performance and reduce power consumption, this study ...
Xie Hongsheng, Bai Gang, Yang Mengying, Song Yulong, Cao Feng   +4 more
doaj  

Numerical simulation of thermal stratification phenomenon in stagnant branch pipe of pressurized water reactors

He jishu
BackgroundIn thermal pipelines of nuclear power systems, thermal stratification is a common phenomenon that can cause stress concentration and deformation of pipeline structures, thereby leading to safety hazards.
MA Jingxiang, DONG Shichang, GONG Shengjie   +2 more
doaj   +1 more source

Dual-Transformer Series Resonant Converter with Full Range ZVS Operation

Shanghai Jiaotong Daxue xuebao
A dual-transformer series resonant converter (DTSRC) is proposed to solve the problem of excessive return power and loss of zero voltage switching (ZVS) operation under light load in the dual bridge resonant converter (DBRC). A dual-transformer structure
LI Yinan, HU Song, LI Xiaodong, CHEN Wu, ZHONG Liping, YANG Qingqing
doaj   +1 more source

An efficiency improvement method for the TAB converter based on the minimization of fundamental reactive power

Frontiers in Energy Research
With the advantages of simple topology, voltage matching, electrical isolation, and bi-directional energy control, the Triple Active Bridge (TAB) has become an active area of exploration and research for the flexible interconnection of DC ports, such as ...
Qihui Feng, Jia Li, Chenghui Lin, Yuming Zhang, Yuelang Zhang, Xueping Yu   +5 more
doaj   +1 more source

Multi-Objective Efficiency-Oriented Optimization for DAB Converters Minimizing Current Stress and Backflow Power with Soft-Switching Assurance

2025 IEEE Applied Power Electronics Conference and Exposition (APEC)
Vehicle-to-Grid (V2G) electric vehicle chargers are becoming increasingly important due to their potential to enhance grid stability, support renewable energy integration, and provide economic benefits. This has led to a growing demand for dual active bridge (DAB) bidirectional DC-DC converters.
Wang, Kun, Laird, Ian, Wang, Jun
openaire   +2 more sources