Results 61 to 70 of about 3,437 (181)

Increasing the Energy Efficiency of Traction Electric Drives of Direct Current

Nauka ta progres transportu
Purpose. The work is aimed at improving the energy efficiency of direct current traction electric drives of electric transport by introducing transistor pulse width converters (PWC) with an optimal switching frequency to minimize total electrical losses ...
V. M. Kovalov, Yu. V. Kovalova
doaj   +1 more source

Influence of the orbital configuration of a four-rail electromagnetic launcher on Joule heat

Advanced Electromagnetics, 2022
During the working process of electromagnetic launcher, the rapid temperature rise caused by heat accumulation has an important influence on the performance and life of the armature and rail.
P. Zhang, T. Shu
doaj  

Collaborative Optimization of Dynamic Characteristics and Armature Structural Safety in Electromagnetic Repulsion Mechanisms

Energies
As a driving mechanism, the electromagnetic repulsion mechanism has been widely used in mechanical switches, such as circuit breakers, current limiters, and bypass switches, owing to its high closing speed and large output force.
Wenying Yang, Fansong Meng, Guofu Zhai
doaj   +1 more source

Numerical simulation and experimental study on the characteristics of armature wear and contact process of small caliber railgun

Defence Technology
During the electromagnetic railgun launch process, high temperature and high current conditions can lead to armature wear, affecting armature/rail contact and degrading launch performance.
Huayi Zhang, Benfeng Gu, Baoming Li, Chunxia Yang   +3 more
doaj   +1 more source

Power Factor Analysis of Flux Modulated Dual-PM Excited Machines based on PM and Armature Flux Linkages

CES Transactions on Electrical Machines and Systems
Flux modulated dual-permanent magnet (PM) excited machine (FMDPMM) has become a promising candidate for direct-drive applications, featuring high torque density and efficiency.
Hong Chen, Yao Meng, Boyi Li, Dawei Li, Ronghai Qu   +4 more
doaj   +1 more source

Efficiency of multi-armature linear pulse electromechanical power and speed converters

Electrical engineering & Electromechanics
Introduction. High-speed linear pulse electromechanical converters (LPEC) provide acceleration of the executive element in a short active section to high speed with significant displacement, while power-purpose LPECs create powerful power impulses of the
V. F. Bolyukh, O. I. Kocherga
doaj   +1 more source

Design and Optimization of a Pneumatic Microvalve with Symmetric Magnetic Yoke and Permanent Magnet Assistance

Actuators
Electromagnetic pneumatic microvalves, widely used in knitting machines, typically operate based on a spring-return mechanism. When the coil is energized, the electromagnetic force overcomes the spring force to attract the armature, opening the valve ...
Zeqin Peng, Zongbo Zheng, Shaochen Yang, Xiaotao Zhao, Xingxiao Yu, Dong Han   +5 more
doaj   +1 more source

DETAJLIRANJE ARMATURE

, 2015
This thesis shows the reinforcement detailing the rules and procedures detailing of reinforcement, some of the most common reinforced concrete structural elements. When we detailing the reinforcement we must follow the rules and recommendations, both theoretical as well as practical.
openaire   +1 more source

Wavelet-Based Health Monitoring Approach for Train Door Actuation Using Motor Current Analysis. [PDF]

Sensors (Basel)
Shiao Y, Gadde P, Bollepelly M.
europepmc   +1 more source

Dynamic switching controller for bidirectional trajectory tracking in PV powered mobile robots considering all their subsystems and irradiance variations. [PDF]

Sci Rep
Reyes-Reyes E, Ordaz-Dehesa JC, Rodríguez-Cerón JR, Silva-Ortigoza R, Santiago-Nogales BN, García-Sánchez JR, Marciano-Melchor M, Silva-Ortigoza G.   +7 more
europepmc   +1 more source