Results 131 to 140 of about 74,738 (303)

SIMULATION OF A HIGH-POWERED VARIABLE FREQUENCY AC DRIVE BASED ON A MULTIPULSE CURRENT SOURCE INVERTER

Electrical engineering & Electromechanics, 2013
A computer model building technique for an AC drive system with an autonomous 24-pulse current inverter is introduced. On the basis of the technique developed, a MATLAB variable-frequency drive model capable of working in both quasi-stationary and ...
G.G. Zhemerov, D.S. Krylov, I.G. Titarenko, A.U. Baru, U.L. Shindnes   +4 more
doaj  

Modular, Multiport AC-DC Converter with Add-On HF Isolating Units

Energies
In this paper, we propose a novel concept of a modular, multiport, single-stage, bidirectional, isolated, three-phase AC-DC converter system. This new system is realized using add-ons to a standard voltage source inverter, including both grid-connected ...
Pawel B. Derkacz, Pawel Milewski, Daniel Wojciechowski, Natalia Strzelecka, Ryszard Strzelecki   +4 more
doaj   +1 more source

An AC drive system to replace an existing DC drive system

, 2010
DC commutator motor is the oldest motor but still the best performance motor. It has control simplicity and control accuracy although commutator motor has some inherent drawbacks due to its mechanical commutator.
Muhandiram, RRN
core  

Digital Control System of Two-Motor Ac Electrical Drive Built by Principles of Harland

, 2017
In the paper, optimization of scalar control system of two-motor electrical ac drive with individual regulators of speed is investigated. Structural scheme of the drive is constructed via electromagnetic process agreement taking into account elasticitic ...
J.N. Dochviri, G.R. Turmanidze
core   +1 more source

3D Printing Innovations in Polymeric Porous and Patterned Architecture

Advanced Functional Materials, EarlyView.
Polymeric foams occupy a unique structural space between dense solids and open networks, where engineered void fraction governs mechanical compliance, thermal resistance, and mass transport. Additive manufacturing now enables precise spatial control over cellular architecture, unlocking designer foam structures across applications spanning crash ...
Dhanush Patil, Sri Vaishnavi Thummalapalli, Clarissa Westover, Arunachalam Ramanathan, M. Taylor Sobzcak, Roumika Patil, Qixuan Xiang, Tiantian Li, Sui Yang, Timothy E. Long, Hongyue Sun, Xianqiao Wang, Yang Liu, Kenan Song   +13 more
wiley   +1 more source

SIMULATION OF AN AC DRIVE SYSTEM COMPRISING A CASCADE MULTILEVEL VOLTAGE INVERTER

Electrical engineering & Electromechanics, 2013
A technique for computer modeling of an AC drive system with a cascade multilevel voltage inverter is introduced. With the technique application, a Matlab-model of a variable-frequency electric drive functioning both in a quasi-stationary and in a ...
G.G. Zhemerov, D.V. Tugay, I.G. Titarenko   +2 more
doaj  

In Situ Crystalline‐Amorphous Composite Oxide Structure Suppressing Thermal Wear Instability for Refractory Multi‐Principal Element Alloy

Advanced Functional Materials, EarlyView.
An effective strategy is developed to overcome the medium temperatures wear resistance degradation in refractory multi‐principal element alloys. By utilizing chemical short‐range ordering to trigger oxygen‐induced amorphization, a composite oxide structure is formed, which combines high hardness with robust stiffness.
Xuhui Pei, Jianbao Zhang, Hanming Wang, Yin Du, Tao Yang, Ji‐Jung Kai, Benyebka Bou‐Saïd, Haifeng Wang   +7 more
wiley   +1 more source

Induction motor variable speed drive performance and impact on energy savings

, 2001
Bibliography: p. 132-134.ESKOM, together with Municipalities distribute power at a line-to-line voltage of 400+/-10%. Hence in theory, the user ends up with a voltage of 340 to 440.
Khumalo, Siboniso T
core  

Vacuum Formed Spherical Triboelectric Architecture Overcoming Direction Constraints for 3D‐Omnidirectional Ultrasonic Energy Receiving

Advanced Functional Materials, EarlyView.
First vacuum formed spherical triboelectric converter for 3D‐omnidirectional ultrasonic energy receiving, with configurable DC or pulse outputs for versatile applications. ABSTRACT Ultrasound‐driven triboelectric nanogenerators (UD‐TENGs) have emerged as promising ultrasonic energy converters for underwater and biomedical applications.
Yanqin Huang, Mengjie Qin, Zixuan He, Xu Yang, Wenjie Chen, Siya Zhou, Qiyuan Zhang, Zhangwei Wang, Yicheng Wang, Yonghong Cheng, Daniel M. Mulvihill, Sandy Cochran, Qingshen Jing   +12 more
wiley   +1 more source

Multimodal Perception and Machine Learning‐Empowered Human Machine Interfaces With Double‐Network Hydrogel Fibers

Advanced Functional Materials, EarlyView.
This work develops polyacrylamide‐alginate (PAM‐Alg) double‐network hydrogel fibers for multimodal perception and intelligent human‐machine interfaces. The covalent‐ionic network provides high strength, toughness, and stable conductivity. Easily woven into wearables and integrated with soft robots, the fibers enable object and temperature recognitions ...
Yujue Yang, Minyu Qiu, Di Tan, Xinlong Liu, Junze Zhang, Ziyu He, Jing Han, Yuanyuan Gao, Zihua Li, Hong Fu, Bingang Xu   +10 more
wiley   +1 more source