Results 11 to 20 of about 4,165,103 (293)
The Detection of Shaft Misalignments using Motor Current Signals from a Sensorless Variable Speed Drive [PDF]
, 2015 Shaft misalignments are common problems in rotating machines which cause additional dynamic and static loads, and vibrations in the system, leading to early damages and energy loss.
Gu, Fengshou +4 more
core +4 more sources
Detection and Diagnosis of Motor Stator Faults using Electric Signals from Variable Speed Drives [PDF]
, 2015 Motor current signature analysis has been investigated widely for diagnosing faults of induction motors. However, most of these studies are based on open loop drives.
Shaeboub, Abdulkarim +4 more
core +4 more sources
Observer-based Fault Detection and Diagnosis for Mechanical Transmission Systems with Sensorless Variable Speed Drives [PDF]
, 2015 Observer based approaches are commonly embedded in sensorless variable speed drives for the purpose of speed control. It estimates system variables to produce errors or residual signals in conjunction with corresponding measurements. The residual signals
Gu, Fengshou +3 more
core +4 more sources
Research of working capacity of pulsed variable-speed drives [PDF]
MATEC Web of Conferences, 2019 The paper presents the results of experimental researches of the basic working capacity characteristics of pulsed variable-speed drives - gear ratio, efficiency factor, and reliability of the eccentric free-wheel mechanisms When conducting research, the ...
Sharkov Oleg +2 more
doaj +1 more source
Hybrid Back-to-Back MMC System for Variable Speed AC Machine Drives
CPSS Transactions on Power Electronics and Applications, 2020 Modular multilevel converter (MMC) has drawn great attention in variable-speed machine drives. However, a challenge exists that the voltage ripple of sub-module capacitors in MMC would be very large at low motor speed. In this paper, a novel back-to-back
Bin-Bin Li
semanticscholar +1 more source
Performance Improvement of Pumps Fed by the Variable Speed Drives
Electrical, Control and Communication Engineering, 2013 Speed inaccuracy decreases the pump efficiency, reliability, and energy saving. This research is devoted to the determination of the ways of accurate speed control of the pump drives operated under changeable loads.
Valery Vodovozov, Ilja Bakman
doaj +1 more source
Energies, 2021 In this paper, a novel approach to matrix-converter-based variable frequency drives is presented. It is proposed that these drives are used to provide or draw out reactive power from the power distribution line, keeping the power factor close to unit and,
Gytis Petrauskas, Gytis Svinkunas
doaj +1 more source
Energies, 2020 Greenhouse gas emission is one of the main environmental issues of today, and energy savings in all industries contribute to reducing energy demand, implying, in turn, less carbon emissions into the atmosphere.
Luigi Cimorelli +3 more
doaj +1 more source
IEEE transactions on power electronics, 2020 This work deals with the sizing of submodule capacitors for modular multilevel converters (MMCs) used for variable speed drives for medium voltage and high voltage electric machines.
Ziwei Ke +6 more
semanticscholar +1 more source
International Conference on Electrical Machines and Systems, 2020 The adoption of wide band-gap (WBG) semiconductors is gaining momentum, particularly in industries where high efficiency and/or extreme power density are major concerns, e.g. electric transportation and aerospace.
D. Cittanti +4 more
semanticscholar +1 more source