Results 71 to 80 of about 1,034,905 (229)

Rotor-to-stator Partial Rubbing and Its Effects on Rotor Dynamic Response [PDF]

, 1991
Results from experimental and analytical studies on rotor to stationary element partial rubbings at several locations and their effects on rotor dynamic responses are presented. The mathematical model of a rubbing rotor is given.
Franklin, Wesley D., Hayashida, Robert D., Muszynska, Agnes   +2 more
core   +1 more source

Research on the method for control of three-phase unbalanced load based on variable frequency power

Dianzi Jishu Yingyong, 2019
A method for control of three-phase unbalanced load based on variable frequency power was proposed in this paper. The general idea was introduced firstly, and then the implementation of the scheme and the design method of variable frequency power supply ...
Wei Na, Zhao Ergang, Li Yadong, Yu Mei, Li Chunming, Zhang Jianjun   +5 more
doaj   +1 more source

Power quality and electromagnetic compatibility: special report, session 2 [PDF]

, 2015
The scope of Session 2 (S2) has been defined as follows by the Session Advisory Group and the Technical Committee: Power Quality (PQ), with the more general concept of electromagnetic compatibility (EMC) and with some related safety problems in ...
Desmet, Jan, Heimbach, Britta, Renner, Herwig   +2 more
core   +1 more source

Field results on developed three-phase four-wire shunt active power filters [PDF]

, 2009
-This paper presents three-phase four-wire Shunt Active Power Filters with ability to compensate current harmonics, power factor, and current unbalance. The power stage of the Active Power Filters is based on a two-level four-leg inverter.
Afonso, João L., Gonçalves, Domingos, Neves, Pedro, Pinto, J. G.   +3 more
core   +1 more source

Multi-objective optimization of unbalanced power distribution systems: a comprehensive approach to address uncertainties and enhance performance

Energy Conversion and Management: X
This study presents an advanced multi-objective optimization framework to enhance the performance of unbalanced power distribution systems. It highlights the significance of three-phase load flow analysis and addresses key problems such as voltage ...
Mohammad Reza Maghami, Elaheh Yaghoubi, Mazlan Mohamed, Elnaz Yaghoubi, Mehdi Zareian Jahromi, Thang Ka Fei   +5 more
doaj   +1 more source

Mid-infrared laser light nulling experiment using single-mode conductive waveguides

, 2007
Aims: In the context of space interferometry missions devoted to the search of exo-Earths, this paper investigates the capabilities of new single mode conductive waveguides at providing modal filtering in an infrared and monochromatic nulling experiment;
Angel, Angel, B. Arezki, Beichman, Bracewell, Bracewell, E. Le Coarer, Fridlund, Gappinger, Haguenauer, J.-E. Broquin, L. Labadie, Labadie, Léger, Léger, Mayor, Mennesson, P. Kern, P. Labeye, R. Maurand, Serabyn, Shaklan, Wallace, Wallace, Wehmeier   +24 more
core   +3 more sources

A hierarchical time-varying optimization algorithm for Photovoltaic-energy storage to suppress three-phase imbalances in active distribution networks

International Journal of Electrical Power & Energy Systems
For three-phase unbalance problems due to excessive single-phase loads, unbalanced load connections and ground faults, etc. This paper proposes a hierarchical time-varying optimization algorithm for active distribution networks to suppress three-phase ...
Xingxu Zhu, Jiyu Wang, Haozheng Yu, Jie Ma, Junhui Li, Cuiping Li   +5 more
doaj   +1 more source

Design of a High-Speed Solid-Rotor Induction Machine With an Asymmetric Winding and Suppression of the Current Unbalance by Special Coil Arrangements

IEEE Access, 2019
High-speed solid-rotor induction machines (IMs) suffer from higher rotor eddy-current losses (as a result of the air-gap flux density harmonics) more than any other type of high-speed machines because of the solid-rotor steel.
Chong Di, Ilya Petrov, Juha J. Pyrhonen
doaj   +1 more source

Dynamics of piezoceramics-based mass and force actuators for rotating machines [PDF]

, 2007
In the past decade, it has become more and more common to install active vibration control devices on rotating systems like grinding machines, tooling centers, industrial fans and drive shafts.
Boer, André de, Hoogt, Peter van der, Sloetjes, Peter   +2 more
core   +1 more source

Investigation of Three-Phase Thyristor Converters under Generalized Impedance Unbalance

RE&PQJ
Line-commutated current converters operated in electrical power systems will work asymmetrically, if the system is not balanced. This asymmetrical operation causes non-characteristic harmonics in the currents and therefore a higher distortion level. As a high distortion level is always disadvantageous, it is worthwhile to find appropriate methods to ...
null Manuel Weiland, null Gerhard Herold
openaire   +1 more source