Results 11 to 20 of about 16,712,159 (288)
Effect of winding harmonics on the asynchronous torque of a single-phase line start permanant-magnet motor [PDF]
, 2005 This paper presents an analytical method for calculating the effect of winding harmonics on the asynchronous torque of a single-phase line-start permanent-magnet motor.
McGilp, M.I. +5 more
core +9 more sources
P-class phasor measurement unit algorithms using adaptive filtering to enhance accuracy at off-nominal frequencies [PDF]
, 2011 While the present standard C.37.118-2005 for Phasor Measurement Units (PMUs) requires testing only at steady-state conditions, proposed new versions of the standard require much more stringent testing, involving frequency ramps and off-nominal frequency ...
Roscoe, Andrew +5 more
core +4 more sources
Coordinated optical and radar observations of ionospheric pumping for a frequency pass through the second electron gyroharmonic at HAARP [PDF]
, 2007 On 4 February 2005, the High-frequency Active Auroral Research Program (HAARP) facility was operated in O and X mode while pointing into the magnetic zenith to produce artificial optical emissions in the ionospheric F layer. The pump frequency was set to
Senior, Andrew +7 more
core +4 more sources
Energy Reports, 2022 Due to the existence of high amount stator current harmonics caused by the inverter nonlinearity, the operation performance of Permanent Magnet Servo System (PMSS) used Proportional–Integral (PI) controller will be affected.
Tianqing Yuan +3 more
doaj +1 more source
The relationship between bubble concentration and the acoustic emission energy of separate frequency bands [PDF]
JASA Express Letters, 2022 This letter presents the relationship between bubble concentration and the energy ratio of low to high frequency bands of their acoustic emissions. Two sensors, placed perpendicular and concentric to a transmitter, captured the emissions from sonicated ...
Krit Sujarittam, James J. Choi
doaj +1 more source
, 2022 The waveforms distortion assessment nowadays requires great research efforts due to the contemporaneous presence of low- and high-frequency harmonics and interharmonics (up to 150 kHz). In this paper, a new multi-method approach allowed accurate and fast
Varilone P. +5 more
core +1 more source
Harmonics and Interharmonics Detection Based on Synchrosqueezing Adaptive S-Transform
Energies, 2022 The integration of renewable energy generation and nonlinear power electronic equipment into the grid brings about complex harmonics and interharmonics problems.
Zhaoyu Lou +3 more
doaj +1 more source
High-Frequency Behavior of Residual Current Devices [PDF]
, 2012 The purpose of this paper is to analyze the behavior of residual current devices at frequencies higher than the rated one. Many experiments are carried out by measuring tripping current and time of devices of different typology, produced by different ...
Freschi, Fabio
core +1 more source
Induction Motor Direct Torque Control with Synchronous PWM
Energies, 2021 A novel induction motor direct torque control (DTC) algorithm with synchronous modulation is presented. Compared to the traditional DTC method, whose main drawback is the presence of low-frequency torque harmonics (sub-harmonics), in the proposed method,
Alessandro Benevieri +4 more
doaj +1 more source
IEEE Access, 2023 An improved modulation method is proposed for two parallel three-level interleaved rectifiers to reduce current harmonics and high-frequency zero-sequence circulating current, which uses sinusoidal pulse width modulation.
Yanfeng Li +3 more
doaj +1 more source