Results 231 to 240 of about 88,496 (262)

Analysis and Detection of Rotor Eccentricity in Permanent Magnet Synchronous Machines Based on Linear Hall Sensors

IEEE transactions on power electronics, 2022
Rotor eccentricity commonly exists in permanent magnet synchronous machines (PMSMs) due to improper assembly, excessive vibration, and continuous operation.
Yuchen Wang, Kai Liu, W. Hua, Chao Zhang, Zheng Wu, Hengliang Zhang   +5 more
semanticscholar   +1 more source

Eccentricity estimate for black hole mergers with numerical relativity simulations

Nature Astronomy, 2020
The origin of black hole mergers discovered by the LIGO 1 and Virgo 2 gravitational-wave observatories is currently unknown. GW190521 3 , 4 is the heaviest black hole merger detected so far.
V. Gayathri, J. Healy, J. Lange, B. O'Brien, M. Szczepańczyk, I. Bartos, M. Campanelli, S. Klimenko, C. Lousto, R. O’Shaughnessy   +9 more
semanticscholar   +1 more source

Parameter analysis and fast prediction of the optimum eccentricity for a latent heat thermal energy storage unit with phase change material enhanced by porous medium

, 2021
The melting performance of porous-medium-enhanced phase change material (PCM) in a horizontal shell-and-tube latent-heat thermal energy storage unit (LHTESU) with eccentric structure is studied through a fixed-grid numerical method.
Yang Xu, Zhangjing Zheng, Song Chen, Xiaobin Cai, Chao Yang   +4 more
semanticscholar   +1 more source

Analytical Model for Cogging Torque Calculation in Surface-Mounted Permanent Magnet Motors With Rotor Eccentricity and Magnet Defects

IEEE transactions on energy conversion, 2020
This article proposes a novel analytical model which combines subdomain method and magnet equivalent circuit (MEC) method to predict the cogging torque of surface-mounted permanent magnet (SPM) motors with rotor eccentricity and magnet defects in any ...
W. Tong, Shiqi Li, Xuelong Pan, Shengnan Wu, Renyuan Tang   +4 more
semanticscholar   +1 more source

Flux-based Detection and Classification of Induction Motor Eccentricity, Rotor Cage, and Load Defects

European Conference on Cognitive Ergonomics, 2020
Motor current signature analysis (MCSA) has been accepted in the field as a reliable means of detecting rotor cage faults in induction motors. However, there are many limitations to MCSA-based detection for other types of faults including rotor ...
Jaehoon Shin, Yonghyun Park, Sang Bin Lee   +2 more
semanticscholar   +1 more source

Evidence for eccentricity in the population of binary black holes observed by LIGO-Virgo-KAGRA

Binary black holes (BBHs) in eccentric orbits produce distinct modulations in gravitational waves (GWs); measuring orbital eccentricity provides evidence for dynamical binary formation channels.
N. Gupte, A. Ramos-Buades, A. Buonanno, J. Gair, M. Miller, Maximilian Dax, S. R. Green, M. Purrer, J. Wildberger, Jakob H. Macke, Bernhard Scholkopf   +10 more
semanticscholar   +1 more source

The influence of the geometric eccentricity on the dynamic behaviors of helical gear systems

, 2020
Geometric eccentricity error is unavoidable in gear systems, resulting that the center of mass and center of rotation do not coincide with each other. The gear center distance and condition of gear tooth engagement are time-varying during the process of ...
Baishun Zhao, Yifan Huangfu, Hui Ma, Zhifang Zhao, Kun Wang   +4 more
semanticscholar   +1 more source

A Review of the Monitoring and Damping Unbalanced Magnetic Pull in Induction Machines Due to Rotor Eccentricity

IEEE transactions on industry applications, 2019
Condition monitoring can diagnose the inception of fault mechanisms in induction motors, thus avoiding failure and expensive repairs. Therefore, there is a strong need to develop an efficient condition monitoring approach.
A. Salah, D. Dorrell, Youguang Guo
semanticscholar   +1 more source

Eccentricity optimization of a horizontal shell-and-tube latent-heat thermal energy storage unit based on melting and melting-solidifying performance

Applied Energy, 2018
As for a horizontal single-pass shell-and-tube latent-heat thermal energy storage unit (LTESU), the eccentricity between inner and outer tube is designed to improve the melting and melting-solidifying performances.
Zhangjing Zheng, Yang Xu, Mingjia Li
semanticscholar   +1 more source

Eccentricity effects of heat source inside a porous annulus on the natural convection heat transfer and entropy generation of Cu-water nanofluid

, 2019
This study presents a numerical investigation on free convection heat transfer and entropy generation of Cu-water nanofluid inside an annulus, fully filled with a porous foam, in presence of a cylindrical heat source.
P. Gholamalipour, M. Siavashi, M. H. Doranehgard   +2 more
semanticscholar   +1 more source