Results 31 to 40 of about 11,364,674 (354)
General Analytical Model of Magnet Average Eddy-Current Volume Losses for Comparison of Multi-phase PM Machines with Concentrated Winding [PDF]
, 2014 this paper studies magnet eddy-current losses in permanent magnet (PM) machines with concentrated winding. First of all, space harmonics of magnetomotive force (MMF) and their influence on magnet losses in electrical machines are investigated.
LEGRANGER, Jerome +2 more
core +1 more source
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
Propagation of Harmonics of Return Traction Current in Rail lines [PDF]
, 2019 An investigation of propagation of return traction current harmonics in rail lines was carried out for railway sections with d. c. and a. c. traction. A mathematic model of traction supply net was proposed.
Serdiuk K. +3 more
core +3 more sources
Harmonic distortion in CMOS current mirrors [PDF]
ISCAS '98. Proceedings of the 1998 IEEE International Symposium on Circuits and Systems (Cat. No.98CH36187), 2002 One of the origins of harmonic distortion in CMOS current mirrors is the inevitable mismatch between the MOS transistors involved. In this paper we examine both single current mirrors and complementary class AB current mirrors and develop an analytical model for the mismatch induced harmonic distortion.
openaire +1 more source
Coordinated control for harmonic mitigation of parallel voltage-source inverters
CES Transactions on Electrical Machines and Systems, 2018 The increasing use of power electronic devices can deteriorate the power quality by introducing voltage and current harmonics. In islanded microgrids, the presence of nonlinear loads can distort the point of common coupling (PCC) voltage, while the dead ...
Yang Qi +3 more
doaj +1 more source
Harmonic feature of 27.5 kV traction power system in a Chinese high‐speed railway
IET Electrical Systems in Transportation, 2022 The key to controlling harmonics in high‐speed railways is to get information on its harmonic feature. In this study, a continuous 24 h harmonic observation is carried out in Ji'an West traction substation of a typical Chinese high‐speed railway. In both
Yadong Fan +7 more
doaj +1 more source
Spatiotemporal phase-matching in capillary high-harmonic generation [PDF]
, 2012 We present a simple phase-matching model that takes into account the full spatiotemporal nature of capillary high-harmonic generation. Spectra predicted from the model are compared to experimental results for a number of gases and are shown to reproduce ...
Rogers, Edward T.F. +22 more
core +1 more source
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
Вестник Самарского государственного технического университета. Серия: Технические науки, 2021 The existing calculation methods in various sources represent rectifier installations as sources of higher harmonics. In this case, the current value of the primary winding of the transformer in the form of rectangles is decomposed into a Fourier series ...
Vyacheslav S. Osipov
doaj +1 more source
A statistic study of harmonics and interharmonics at a modern wind-turbine [PDF]
, 2014 The work presents measurements of harmonics and interharmonics from a modern wind turbine over a period of several days, using a conventional power quality monitor.
Kai Yang +7 more
core +1 more source