Results 111 to 120 of about 1,709,387 (277)

Sensorless commutation of printed circuit brushless direct current motors

, 2010
The reliability and overall cost of brushless direct current (BLDC) motors can be significantly improved by implementation of an effective sensorless commutation control method.
Gambetta, D., D. Gambetta, A. Ahfock, Ahfock, A.   +3 more
core   +1 more source

Income Mobility, Automation, and Occupational Licensing

Southern Economic Journal, EarlyView.
ABSTRACT Technological change has long been tied with distributional concerns due to displacement against certain skills on labor markets. Short‐run dislocations could create scarring in the long run. For example, shifts against less skilled workers with children could limit their ability to improve the inter‐generational income mobility of their ...
Vincent Geloso, Alicia Plemmons, Pradyot Sharma   +2 more
wiley   +1 more source

Operation characteristics analysis of the symmetrical unipolar SLCC-HVDC

电力工程技术
Multi-source self-adaption STATCOM and line commutated converter (SLCC) technology can overcome the inherent shortcomings of conventional line commutated converter (LCC) based high-voltage direct current (HVDC) transmission technology.
Junchao ZHENG, Xiangping KONG, Lei GAO, Jinjiao LIN, Chenqing WANG, Yan TAO   +5 more
doaj   +1 more source

Emergency Response Capabilities of Institutions of Higher Education: A Case of a Developing Country

Safety Science and Technology, EarlyView.
This study justifies its significance by addressing crucial gaps in knowledge concerning emergency response capabilities in higher education institutions, focusing specifically on the KNUST; ranked as the best university for quality education (SDG 4) by Times Higher Education in 2023.
Lyndon N. A. Sackey, Bin U. Sadique, Janice Tetteh, Abena T. Twumasi, Ebuka B. Uwanda, Ebenezer E. Y. Amuah, Daniel K. O. Asamoah   +6 more
wiley   +1 more source

Bypassing SM strategy applied in interconnected LCC-HVDCs for commutation failure mitigation

, 2017
Recently, DC current reduction control for commutation failure mitigation is executed through point-to-point LCC-HVDC's rectifier. For an interconnected LCC-HVDC system through MMC-based DC-DC converter (MDC), MDC can be used to reduce the DC current ...
Chuanyue, Li, Wang, Sheng, Liang, Jun
core   +1 more source

When Time Stands Still: The Destructive Experience of Ambiguous Loss among Mothers of Combat Soldiers

Symbolic Interaction, EarlyView.
What happens when stories refuse coherence? This article examines ambiguous loss among mothers of combat soldiers, focusing on how prolonged waiting and uncertainty infiltrate everyday life, eroding sensemaking. Drawing on ethnographic interviews, it explores how mothers experience the contraction of time and space—manifested in suspended routines ...
Shirly Bar‐Lev, Galit Itzhaki Draizin, Agamit Gelb   +2 more
wiley   +1 more source

Methods to Prevent Commutation Failures in HVDC Systems

B&H Electrical Engineering
Abstract Commutation failure (CF) is the main fault type in HVDC (High voltage direct current) system with line commuted converter. So, Commutation faults are the main disadvantages of line commutated converter HVDC systems. There are some situations that cause the fault in these types of faults that occur in thyristor valve ...
openaire   +1 more source

Reconciling Goffman and Disability Studies: “Interactional” and “Structural” Stigma in the Lives of Parents of Learning‐Disabled Adults

Symbolic Interaction, EarlyView.
Erving Goffman cuts a divisive figure in disability studies. Some criticize his conception of “stigma” as deviance‐focused and as ignoring structural forces that shape personal encounters. Others praise his recognition of stigma as an interactional phenomenon.
Gareth M. Thomas
wiley   +1 more source

Architecting and Industrializing Advanced Production and Manufacturing Systems for Critical Industries

Systems Engineering, EarlyView.
ABSTRACT Advanced production systems play a vital role in modern society. Such systems are developed and industrialized over multiple years and at great expense. The complexities of these systems are exacerbated in the case of metal additive manufacturing, which involves numerous process variables and relies on various auxiliary systems.
Duncan W. Gibbons, Andre F. van der Merwe   +1 more
wiley   +1 more source

Decentralized Electric Vehicle Charging Strategy for Voltage Regulation by Charging Shifting and Reactive Power Control in Distribution System

IEEJ Transactions on Electrical and Electronic Engineering, EarlyView.
This paper proposes a decentralized electric vehicle (EV) charging control method designed to clear voltage violations in distribution grids with high EV penetration, while considering consumer convenience. The concentration of EV charging demand can cause localized voltage violations, posing a significant challenge to grid operation.
Takafumi Watanabe, Akihisa Kaneko, Jun Yoshinaga, Hideo Ishii, Yasuhiro Hayashi, Yoshihiro Hirata, Takami Yokose, Nobuteru Ishihara   +7 more
wiley   +1 more source