scholarly journals Extension to 3-D of the low-frequency electromagnetic plasma simulation models, LDRD Final Report 95-ERD-036

1997 ◽  
Author(s):  
D.W. Hewett ◽  
G. DiPeso ◽  
M Gibbons ◽  
M. Lambert ◽  
L.S. Tung
Keyword(s):  
Low Frequency ◽  
Simulation Models ◽  
Plasma Simulation ◽  
Final Report

Analysis and Simulation of Low Speed Sensorless Vector Control with Two Current Signal Injection Schemes

2013 ◽  
Vol 722 ◽  
pp. 361-368
Author(s):  
Yu Dong Li ◽  
Bo Zhou ◽  
Ying Liu ◽  
Cheng Liang Zhao
Keyword(s):  
Vector Control ◽  
Permanent Magnet Synchronous Motor ◽  
Low Frequency ◽  
Simulation Models ◽  
Position Estimation ◽  
Estimation Methods ◽  
Current Signal ◽  
Rotor Position ◽  
Sensorless Vector Control ◽  
Signal Injection

Two current signal injection methods, the fluctuating high frequency (HF) current signal injection and low frequency (LF) current signal injection, were discussed. The basic principles of rotor position self-sensing using these current signal injection and the key techniques in implementation were presented and the simulation models for sensorless vector control systems of a permanent magnet synchronous motor (PMSM) were established using two proposed rotor position estimation methods. Comparative simulation study of the fluctuating HF current signal injection and LF current signal injection was investigated, and draw the conclusions that the saliency-tracking scheme using fluctuating HF current signal injection possesses simpler configuration and better speed-adjustable performance both in static and dynamic.

scholarly journals Low frequency RF current drive. Final report, January 1, 1988--May 31, 1997

1999 ◽  
Author(s):  
N. Hershkowitz
Keyword(s):  
Low Frequency ◽  
Current Drive ◽  
Final Report

scholarly journals Coupled models in low-frequency electromagnetic simulation LDRD Final Report 94-ERI-004

1997 ◽  
Author(s):  
D.W. Hewett ◽  
D. Bateson ◽  
M. Gibbons ◽  
M. Lambert ◽  
L. Tung ◽  
...  
Keyword(s):  
Low Frequency ◽  
Electromagnetic Simulation ◽  
Final Report ◽  
Coupled Models

CELEST1D: an implicit, fully kinetic model for low-frequency, electromagnetic plasma simulation

1992 ◽  
Vol 69 (2-3) ◽  
pp. 253-276 ◽  
Author(s):  
H.X. Vu ◽  
J.U. Brackbill
Keyword(s):  
Kinetic Model ◽  
Low Frequency ◽  
Plasma Simulation

scholarly journals The Influence of Finite Element Meshing Accuracy on a Welding Machine for Offshore Platform’S Modal Analysis

2018 ◽  
Vol 25 (s3) ◽  
pp. 147-153
Author(s):  
Jiuming Xie ◽  
Dengyue Sun ◽  
Chengying Xu ◽  
Jin Wu
Keyword(s):  
Finite Element ◽  
Modal Analysis ◽  
Mesh Refinement ◽  
Low Frequency ◽  
Mesh Size ◽  
Simulation Models ◽  
Element Analysis ◽  
Factors Affecting ◽  
Welding Machine ◽  
Finite Element Meshing

Abstract The purpose objective of this study was to investigate the influence of finite element meshing accuracy on modal analysis which is one of the basic factors affecting the accuracy of finite element analysis and mostly preoccupies the working staff in pre-processing finite element simulation models. In this paper, we established several finite element models of a welding machine for offshore platform, with the meshing accuracy as the variable and workbench software as the platform for modal analysis, as the same time, comparing the analysis results. The results indicated that for some specific structures and simulation types, mesh refinement alone does not achieve desired results, and the authors indicate that mesh refinement is rarely related to the equipment’s low-frequency modal analysis but it’s great related to the equipment’s high-frequency modal analysis. The findings of this study may serve as breaking the opinion that smaller mesh size means higher calculation precision and provides references for mesh division practices in low frequency modal analysis.

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