Results 41 to 50 of about 4,334 (147)

Optimal Design in Roller Pump System Applications for Linear Infusion

Computation, 2020
In this study, an infusion roller pump comprising two separate innovative resilient tube designs is presented. The first incorporates the flexible tubing cross-section area in its relaxed state as a lenticular one for power reduction reasons.
Christos Manopoulos, Giannis Savva, Achilleas Tsoukalis, Georgios Vasileiou, Nikolaos Rogkas, Vasilios Spitas, Sokrates Tsangaris   +6 more
doaj   +1 more source

Reliability improvement based on optimized modulations and rotating shedding frequency in modular DAB EV chargers

iEnergy
Modular dual-active-bridge (DAB) converter is widely used for fast electric vehicle (EV) charging due to galvanic isolation and high power processing capability.
Jiayi Geng, Riccardo Mandrioli, Ariya Sangwongwanich, Mattia Ricco   +3 more
doaj   +1 more source

Development and Characterization a Single-Active-Chamber Piezoelectric Membrane Pump with Multiple Passive Check Valves

Sensors, 2016
In order to prevent the backward flow of piezoelectric pumps, this paper presents a single-active-chamber piezoelectric membrane pump with multiple passive check valves.
Ronghui Zhang, Feng You, Zhihan Lv, Zhaocheng He, Haiwei Wang, Ling Huang   +5 more
doaj   +1 more source

DAB minimum current stress segmented optimal control strategy based on extended phase shift control

电力工程技术
To address the issue of low transmission efficiency in dual active bridge (DAB) converters during electric vehicle charging and discharging processes, a minimum current stress optimization control strategy combining the differential extremum method with ...
Xingguo TAN, Chaomeng LI, Gaoming FENG, Xin ZHAO, Liangliang SUN   +4 more
doaj   +1 more source

Global flow behaviors of multiple shafts in shallow-buried urban road tunnels subjected to fire load

Underground Space
Shallow-buried urban road tunnels with shafts (URTS) have reduced traffic congestion in large cities. During fire scenarios, the backflows occur at those shafts far away from the fire source inhibiting smoke exhaust, but its rules have been unknown.
Daolong Xiong, Shiqi Zhang, Yan Ouyang, Yan Tong, Zelin Liu, Kaiquan Chen, Peng Wang, Yinqing Zhou   +7 more
doaj   +1 more source

Research on Control Strategy of EMU Bidirectional Charger Based on DAB Circuit

机车电传动, 2020
In order to simplify the topology structure of the traditional EMU charger, reduce the volume and weight of the equipment and improve the safety, the DAB was applied to the EMU charger.
Bingzhang LI, Minggao ZENG, Weiwei GAN, Qingliang ZHAO, Wei GUO, Qiao HE   +5 more
doaj  

Improving Peak-load Pricing Method for Provincial Transmission and Distribution Network Considering Power Backflow

IOP Conference Series: Earth and Environmental Science, 2019
Abstract In view of the power backflow phenomenon in provincial transmission and distribution network caused by the fact that more and more new energy power is connected to the power grid, a provincial network voltage level pricing method considering power backflow is proposed.
Qian Junjie, You Dahai, Ruan Bo, Zou Qi, Liu Hengwei   +4 more
openaire   +1 more source

Distribution Arrester Outages Caused by Lightning Backflow Current Flowing from Customer's Facility into Power Distribution Lines

IEEJ Transactions on Power and Energy, 1997
Direct lightning strokes are considered to be a main cause of damage to surge arresters on power distribution lines. Recently, lightning performance of distribution lines has been observed using still cameras, and lightning-caused distribution outages on hilltop areas on the coast of the Sea of Japan have been investigated.
Kazuo Nakada, Tsutomu Yokota, Shigeru Yokoyama, Akira Asakawa, Tetsuji Kawabata   +4 more
openaire   +2 more sources

A bidirectional AC-DC converter for charging piles with a backflow power optimization control strategy

Journal of Physics: Conference Series
Abstract This paper proposes a single-stage isolated converter with a backflow power optimization method for V2G charging piles. The modulation algorithm is optimized, and the phase shifts are designed to minimize the backflow power. Due to the suppression of backflow power during the switching period, the power factor correction (PFC ...
Qingxiang Shen, Tengfei Yao
openaire   +1 more source

Dynamic and flow instability analysis during runaway process for a pump turbine

Engineering Applications of Computational Fluid Mechanics
A power failure in the pump condition combined with the rejection of the guide vanes can cause the unit to runaway, which represents a dangerous transitional process for pumped storage power stations.
Yanyan Li, Longgang Sun, Pengcheng Guo, Zhuofei Xu   +3 more
doaj   +1 more source