Results 41 to 50 of about 26,994 (304)
Numerical estimation of AC loss in superconductors with ripple current [PDF]
, 2013 Proceedings of the 25th International Symposium on Superconductivity (ISS 2012) Advances in Superconductivity XXV , December 3-5, 2012, TOWER HALL FUNABORI, Tokyo, JapanThe loss energy density (AC loss) with ripple current is numerically calculated by ...
Kawahara, T. +5 more
core +4 more sources
EnergiesThe DC bus current ripple is a critical performance parameter affecting the operation of current source inverters (CSIs). In high-power applications, CSIs often operate at lower switching frequencies to minimize losses. However, maintaining low levels of
Weiqi Wang +5 more
doaj +1 more source
Analysis and Minimization of Output Current Ripple of Multiphase Carrier-Based PWM Inverters [PDF]
ITB Journal of Engineering Science, 2010 Analysis and minimization of output current ripple of multiphase carrier-based PWM inverters are presented in this paper. Analytical expression of rms value of output current ripple of multiphase PWM inverters as a function of the reference signal is ...
Pekik Argo Dahono
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Magnetic Signature Reduction by Converter Switching Frequency Modulation in Degaussing Systems
IEEE Access, 2022 Ships can avoid to be detected by magnetic mines by reducing their magnetic signature with degaussing coils. Degaussing currents are provided by switched mode power supplies which impose a current ripple on top of the degaussing current. The ripple might
Djurre Wikkerink +3 more
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Influence of Travelling Current Linkage Harmonics on Inductance Variation, Torque Ripple and Sensorless Capability of Tooth-Coil Permanent-Magnet Synchronous Machines [PDF]
, 2014 This paper introduces an important source of torque ripple in PMSMs with tooth-coil windings (TC-PMSMs). It is theoretically proven that saturation and cross-saturation phenomena caused by the non-synchronous harmonics of the stator current linkage cause
Petrov, Ilya +2 more
core +1 more source
IEEE Access, 2022 This paper proposes a torque ripple reduction for brushless DC (BLDC) permanent magnetic (PM) motor drive based on the DC-link voltage pulse amplitude modulation (PAM).
Ching-Lon Huang +5 more
doaj +1 more source
SEDIMENT TRANSPORT AND RIPPLES DUB TO WAVES AND CURRENTS
Coastal Engineering Proceedings, 1978 Water velocities and shear stresses have been determined for a laminar boundary layer of a progressive wave travelling over a regular series of ripples. The Lavrentiev variational method was used to transform conformally the water area with ripples into a strip with flat bottom, while the Lin approach permitted solution of the boundary layer equation ...
Zbigniew Pruszak, Ryszard B. Zeidler
openaire +2 more sources
FEBS Letters, EarlyView.Embryo‐like structures (stembryos) are an innovative tool, but they are hindered by experimental variability and limited developmental potential. DNA methylation is crucial for mammalian development, but its status in stembryo models is poorly characterized.
Sara Canil +4 more
wiley +1 more source
Optimal Modulation Strategy for Current-Source Converter to Reduce DC-Link Current Ripple [PDF]
, 2023 As one of the most important performance indices of a current-source converter, dc-link current ripple is closely related to the modulation strategy. Excessive dc-link current ripple not only reduces the system efficiency but also increases the total ...
Ding, Hao +9 more
core +1 more source
International Journal of Electrical Power & Energy SystemsDC microgrids have the risk of wideband DC bus voltage ripples. The ripple frequency may vary with system operating conditions, increasing the difficulty in voltage ripple suppression.
Yan Wu, Wei Wang, Fen Tang, Xuezhi Wu
doaj +1 more source