Results 21 to 30 of about 7,769,894 (338)

Adaptive Phasor Estimation Algorithm Based on a Least Squares Method

open access: yesEnergies, 2019
This paper proposes an adaptive phasor estimation algorithm based on a least square method that can suppress the adverse effect of an exponentially decreasing DC offset component in a phasor estimation process. The proposed algorithm is composed of three
Woo-Joong Kim   +2 more
doaj   +1 more source

Improvement of microstructure and mechanical properties of stainless steel TIG based wire arc additive manufacturing by using AC/DC mix current waveform

open access: yesJournal of Materials Research and Technology, 2023
In this work, a new current waveform, the AC/DC mix current waveform was employed to improve the microstructure and mechanical properties of 307Si stainless steel component during the TIG based wire arc additive manufacturing (TIG-WAAM).
Chao Chen   +3 more
doaj   +1 more source

Influence of Aging on Creepage Discharge Characteristics of Oil-Paper Insulation Under AC-DC Combined Voltage

open access: yesIEEE Access, 2021
There is a relative lack of research on the development of creepage discharge in aged oil-paper insulation subjected to AC-DC combined voltage in converter transformers.
Jin Fubao, Zhou Yuanxiang, Liang Bin
doaj   +1 more source

Pumping charge with ac magnetic fluxes and the dynamical breakdown of Onsager symmetry [PDF]

open access: yes, 2013
We study the transport properties of setups with one and two mesoscopic rings threaded by ac magnetic fluxes of the form \Phi(t)=\Phi^{dc} + \Phi^{ac} cos(\Omega_0 t + \delta) and connected to two different particle reservoirs.
Arrachea, Liliana   +1 more
core   +3 more sources

Design and implementation of 30kW 200/900V LCL modular multilevel based DC/DC converter for high power applications [PDF]

open access: yes, 2016
This paper presents the design, development and testing of a 30kW, 200V/900V modular multilevel converter (MMC) based DC/DC converter prototype. An internal LCL circuit is used to provide voltage stepping and fault tolerance property.
Aboushady, A.   +3 more
core   +2 more sources

A Component-Reduced Zero-Voltage Switching Three-Level DC-DC Converter [PDF]

open access: yesIECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society, 2016
The basic Zero-Voltage Switching (ZVS) three-level DC-DC converter has one clamping capacitor to realize the ZVS of the switches, and two clamping diodes to clamp the voltage of the clamping capacitor. In order to reduce the reverse recovery loss of the diode as well as its cost, this paper proposes to remove one of the clamping diodes in basic ZVS ...
Qin, Zian   +3 more
openaire   +2 more sources

Control Strategy Based on Arm-Level Control for Output and Circulating Current of MMC in Stationary Reference Frame

open access: yesEnergies, 2021
This paper proposed a control method for output and circulating currents of modular multilevel converter (MMC). The output and circulating current are controlled with the help of arm currents, which contain DC, fundamental frequency, and double frequency
Waqar Uddin   +5 more
doaj   +1 more source

IRX-2, a Novel Immunotherapeutic, Enhances Functions of Human Dendritic Cells [PDF]

open access: yes, 2013
Background: In a recent phase II clinical trial for HNSCC patients, IRX-2, a cell-derived biologic, promoted T-cell infiltration into the tumor and prolonged overall survival. Mechanisms responsible for these IRX-2-mediated effects are unknown.
A Lopez-Albaitero   +47 more
core   +4 more sources

Step-up DC-DC converter passive component dimensioning in photovoltaic applications

open access: yes2012 IEEE 27th Convention of Electrical and Electronics Engineers in Israel, 2012
Boost converter is a common solution for power conditioning of photovoltaic systems. Inductance and capacitance values of the boost converter are of high importance when the panel voltage ripple is examined. The ripple has a severe effect on the maximum power point tracking efficiency.
Hannonen Janne   +3 more
openaire   +2 more sources

A classical model for the negative dc conductivity of ac-driven 2D electrons near the cyclotron resonance

open access: yes, 2003
A classical model for {\em dc} transport of two dimensional electrons in a perpendicular magnetic field and under strong irradiation is considered. We demonstrate that, near the cyclotron resonance condition, and for {\em linear} polarization of the {\em
A. A. Koulakov   +9 more
core   +1 more source

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