Results 31 to 40 of about 146,883 (325)
Determination of the levitation limits of dust particles within the sheath in complex plasma experiments [PDF]
, 2011 Experiments are performed in which dust particles are levitated at varying heights above the powered electrode in a RF plasma discharge by changing the discharge power.
Angela Douglass +6 more
core +3 more sources
Band-Limited Three-Level Modulation for Balancing Capacitor Voltages in Neutral-Point-Clamped Converters [PDF]
IEEE Transactions on Power Electronics, 2020 In this article, a band-limited three-level modulation scheme is proposed for a three-phase neutral-point-clamped (NPC) converter with an aim to balance the average capacitor voltages under all operating conditions. When conventional carrier-based pulsewidth modulation is applied, the amplitude of neutral point (NP)-voltage ripple tends to increase ...
Neha Beniwal +5 more
openaire +3 more sources
A Study on Neutral-Point Potential in Three-Level NPC Converters
Energies, 2019 This paper proposes an accurate mathematical model of three-level neutral-point-clamped (NPC) converters that can accurately represent the midpoint potential drift of the DC link with parameter perturbation.
Maosong Zhang +6 more
doaj +1 more source
A Neutral Point Voltage Balancing Method for Multi-Level GTO Inverters
Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting, 2006 The balancing problem of the DC-link capacitor voltage is inherent in the NPC inverter. It is extremely important to keep the upper and lower DC-link capacitor voltages balanced to guarantee the three level operation of the inverter. Generally, the balancing of the DC-link voltage degrades at very low operating frequencies of the inverter.
openaire +2 more sources
Neutral points voltage balancing control of a four-level π-type converter [PDF]
2016 IEEE Energy Conversion Congress and Exposition (ECCE), 2016 In this paper, a carrier-based modulation method with optimal zero-sequence signal injection has been introduced to modulate a four-level π-type converter as well as regulate its DC-link neutral points' voltages. The two neutral points' voltages can be well controlled with a back-to-back configuration even under high modulation index and high power ...
Jin, Bosen, Yuan, Xibo
openaire +2 more sources
Controlling Polymer Capture and Translocation by Electrostatic Polymer-Pore Interactions [PDF]
, 2017 Polymer translocation experiments typically involve anionic polyelectrolytes such as DNA molecules driven through negatively charged nanopores. Quantitative modelling of polymer capture to the nanopore followed by translocation therefore necessitates the
Abramowitz M. +4 more
core +2 more sources
Analysis of loss distribution for power devices of active neutral point clamped three-level inverter
Gong-kuang zidonghua, 2014 In view of problem of uneven loss distribution of power devices in running process of traditional neutral point clamped three level inverter, this paper introduced working principle and basic modulation strategy of active neutral point clamped three ...
ZHAO Xia +4 more
doaj +1 more source
Applied Sciences, 2021 The balance control of neutral-point voltage (NPV) is important in the three-level converter. In this paper, this problem is studied by taking the VIENNA circuit as an example.
Hongyan Zhao, Yan Li, Fei Lin, Yian Yan
doaj +1 more source
Broken Symmetry and Coherence of Molecular Vibrations in Tunnel Transitions
, 2004 We examine the Breit-Wigner resonances that ensue from field effects in molecular single electron transistors (SETs). The adiabatic dynamics of a quantum dot elastically attached to electrodes are treated in the Born-Oppenheimer approach.
Dykhne, Alexander M. +1 more
core +3 more sources
Capacitor voltage balance limits in a multilevel-converter-based energy storage system [PDF]
, 2011 This paper studies an energy storage system based on a three-level DC-DC converter and a gridconnected neutral-point-clamped inverter. The main advantages of this multilevel power conversion system are highlighted and the neutral-point voltage ...
Alzola, José Ángel +4 more
core +2 more sources