scholarly journals Condition monitoring and severity estimation of rotor demagnetisation fault using magnetic flux measurement data

2021 ◽  
Author(s):  
Adil Usman ◽  
Vivek. K. Sharma ◽  
Bharat. S. Rajpurohit
Keyword(s):  
Magnetic Flux ◽  
Condition Monitoring ◽  
Measurement Data ◽  
Flux Measurement ◽  
Severity Estimation

Magnetic Flux Analysis for the Condition Monitoring of Electric Machines: A Review

2021 ◽  
pp. 1-1
Author(s):  
Israel Zamudio-Ramirez ◽  
Roque A Alfredo Osornio-Rios ◽  
Jose Alfonso Antonino-Daviu ◽  
Hubert Razik ◽  
Rene de Jesus Romero-Troncoso
Keyword(s):  
Magnetic Flux ◽  
Condition Monitoring ◽  
Electric Machines ◽  
Flux Analysis

GMR-based magnetic flux leakage technique for condition monitoring of steel track rope

2011 ◽  
Vol 53 (7) ◽  
pp. 377-381 ◽  
Author(s):  
W Sharatchandra Singh ◽  
B P C Rao ◽  
C K Mukhopadhyay ◽  
T Jayakumar
Keyword(s):  
Magnetic Flux ◽  
Condition Monitoring ◽  
Magnetic Flux Leakage ◽  
Flux Leakage

Theoretical analysis of localized magnetic flux measurement by needle probe

1998 ◽  
Vol 08 (PR2) ◽  
pp. Pr2-717-Pr2-720 ◽  
Author(s):  
T. Yamaguchi ◽  
K. Senda ◽  
M. Ishida ◽  
K. Sato ◽  
A. Honda ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Magnetic Flux ◽  
Flux Measurement ◽  
Needle Probe

scholarly journals A Data Filter for Identifying Steady-State Operating Points in Engine Flight Data for Condition Monitoring Applications

2010 ◽  
Author(s):  
Donald L. Simon ◽  
Jonathan S. Litt
Keyword(s):  
Steady State ◽  
Standard Deviation ◽  
Condition Monitoring ◽  
Measurement Data ◽  
Streaming Data ◽  
State Data ◽  
Flight Data ◽  
Monitoring Applications ◽  
The Mean ◽  
Operating Points

This paper presents an algorithm that automatically identifies and extracts steady-state engine operating points from engine flight data. It calculates the mean and standard deviation of select parameters contained in the incoming flight data stream. If the standard deviation of the data falls below defined constraints, the engine is assumed to be at a steady-state operating point, and the mean measurement data at that point are archived for subsequent condition monitoring purposes. The fundamental design of the steady-state data filter is completely generic and applicable for any dynamic system. Additional domain-specific logic constraints are applied to reduce data outliers and variance within the collected steady-state data. The filter is designed for on-line real-time processing of streaming data as opposed to post-processing of the data in batch mode. Results of applying the steady-state data filter to recorded helicopter engine flight data are shown, demonstrating its utility for engine condition monitoring applications.

Interplanetary magnetic flux: Measurement and balance

1992 ◽  
Vol 97 (A1) ◽  
pp. 171 ◽  
Author(s):  
D. J. McComas ◽  
J. T. Gosling ◽  
J. L. Phillips
Keyword(s):  
Magnetic Flux ◽  
Flux Measurement

scholarly journals Drift Self-compensating Type Flux-meter for Automatic Magnetic Flux Measurement

2003 ◽  
Vol 8 (4) ◽  
pp. 160-163 ◽  
Author(s):  
E. M. Ga ◽  
D. Son ◽  
J. G. Bak ◽  
S. G. Lee
Keyword(s):  
Magnetic Flux ◽  
Flux Measurement

scholarly journals Magnetospheric plasma boundaries: a test of the frozen-in magnetic field theorem

2005 ◽  
Vol 23 (7) ◽  
pp. 2565-2578 ◽  
Author(s):  
R. Lundin ◽  
M. Yamauchi ◽  
J.-A. Sauvaud ◽  
A. Balogh
Keyword(s):  
Magnetic Field ◽  
Solar Wind ◽  
Magnetic Flux ◽  
Plasma Physics ◽  
Electric Fields ◽  
Measurement Data ◽  
Space Plasma ◽  
Space Plasma Physics ◽  
Macroscopic System ◽  
Ideal Mhd

Abstract. The notion of frozen-in magnetic field originates from H. Alfvén, the result of a work on electromagnetic-hydrodynamic waves published in 1942. After that, the notion of frozen-in magnetic field, or ideal MHD, has become widely used in space plasma physics. The controversy on the applicability of ideal MHD started in the late 1950s and has continued ever since. The applicability of ideal MHD is particularly interesting in regions where solar wind plasma may cross the magnetopause and access the magnetosphere. It is generally assumed that a macroscopic system can be described by ideal MHD provided that the violations of ideal MHD are sufficiently small-sized near magnetic x-points (magnetic reconnection). On the other hand, localized departure from ideal MHD also enables other processes to take place, such that plasma may cross the separatrix and access neighbouring magnetic flux tubes. It is therefore important to be able to quantify from direct measurements ideal MHD, a task that has turned out to be a major challenge. An obvious test is to compare the perpendicular electric field with the plasma drift, i.e. to test if E=–v×B. Yet another aspect is to rule out the existence of parallel (to B) electric fields. These two tests have been subject to extensive research for decades. However, the ultimate test of the "frozen-in" condition, based on measurement data, is yet to be identified. We combine Cluster CIS-data and FGM-data, estimating the change in magnetic flux (δB/δt) and the curl of plasma –v×B(∇×(v×B)), the terms in the "frozen-in equation". Our test suggests that ideal MHD applies in a macroscopic sense in major parts of the outer magnetosphere, for instance, in the external cusp and in the high-latitude magnetosheath. However, we also find significant departures from ideal MHD, as expected on smaller scales, but also on larger scales, near the cusp and in the magnetosphere-boundary layer. We discuss the importance of these findings. Keywords. Magnetospheric physics (Magnetopause, cusp and boundary layers; Solar wind-magnetosphere interactions) – Space plasma physics

Sign in / Sign up

Export Citation Format

Share Document