Analysis of airgap flux, current, and vibration signals as a function of the combination of static and dynamic airgap eccentricity in 3-phase induction motors

Dorrell, David G.; Thomson, William T.; Roach, S.

doi:10.1109/28.567073

Cited by 414 publications

(77 citation statements)

References 3 publications

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“…In laboratory and industrial practice, the measurement coil may be located on the non-drive side of the fan cover [16] or on the driving side inside of the bearing disk [14,15], less frequently on the stator body. This axial flux signal can just be used in many ways, both for the diagnosis of the machine condition itself and for determining the rotational speed or torque of the motor shaft.…”

Section: Fig 1 Methods Of Axial Flux Measurementmentioning

confidence: 99%

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Calculating an electromechanical torque of a squirrel cage motor based on an axial flux obtained by the FEM

2017

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Abstract. This article presents a method of calculating an axial flux signal and how to use this signal to determine an electromagnetic torque for a squirrel cage induction motor in a steady state. Numerical analyses were performed using a two-dimensional field-circuit model for the squirrel cage induction motor. Most of analyses were performed for a symmetric motor and to estimate a magnitude of the electromagnetic torque, an algorithm was developed. The electromagnetic torque estimation method proposed in the article is easy to implement and does not require any interference into the drive system transmission. The analysis shows that it is possible for the induction motor to determine a load torque based on the axial flux measurement using a measuring coil applied to the motor, for example from the fan side.

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Section: Fig 1 Methods Of Axial Flux Measurementmentioning

confidence: 99%

“…This signal is easily measurable and allows to extract many useful information about the condition of the machine itself and about the efficiency of the electric power conversion by this machine [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Calculating an electromechanical torque of a squirrel cage motor based on an axial flux obtained by the FEM

2017

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“…The table below shows the earlier research studies [2][3][4][5][6] that have utilised these eccentricity fault frequency equations. The previous studies primarily utilised only one of these equations and a single sensor type, and found that a significant increase in the magnitude of a characteristic fault frequency can indicate an eccentricity fault.…”

Section: Characteristic Eccentricity Fault Frequency Equationsmentioning

confidence: 99%

“…In [2], a 11 kW machine was studied to detect and distinguish different levels of severity of both static (SE = 0 to 50% in 6 equal steps) and dynamic eccentricity (DE = 0%, 20%, 40%) using the fault frequency components (Eqn. 2 in Table 1) in the current spectrum, under 3 different loading conditions (0%, 50% and 100%).…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Static Eccentricity Fault Frequencies using Multiple Sensors in Induction Motors and Effects of Loading

Supangat

Grieger

Ertugrul

et al. 2006

IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics

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-A significant number of studies have been reported in the literature on the detection of eccentricity faults in induction machines; however these have generally used one type of sensor such as current or vibration, and not studied in detail the effect of loading. This paper examines the use of fault frequency components in the current, flux and vibration sensor signals with the aim of both detecting and estimating the severity of static eccentricity faults in the presence of load variations. The research is based on an extensive series of sensor measurements taken using a specially modified 2.2kW induction machine under varying conditions of static eccentricity and loading.

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Fault Diagnosis of Induction Motors, Introduction

Riera-Guasp¹

2022

Wiley Encyclopedia of Electrical and Electronics Engineering

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This article is intended as an introduction to the field of induction machine fault diagnosis. Its objective is to give an overview of the problems that arise in this field and the methodologies used to solve them, so that readers are given access to the abundant available technical literature. In the first part of the article, basic concepts and terminology used in this field are introduced. A classification of the different types of faults is made, and the concepts of on‐line, off‐line, stationary or transitory diagnosis, and diagnostic methodologies in the time domain, frequency domain, or the time–frequency domain are explained. The most widely used mathematical tools are also introduced in a conceptual way and are related to the previous concepts. In the second part of the article, a section is dedicated to each of the main types of faults. In each case, the causes of the fault, the consequences, and the physical phenomena they produce are explained. These physical phenomena are the basis of the fault diagnosis techniques, which are explained below. For each type of fault, the most widely used methodologies in the industrial field are presented, and in some cases alternative methods proposed in the literature, aimed at solving specific problems, are also commented. Throughout the article numerous examples based on laboratory tests and measurements obtained under real operating conditions are presented, which facilitate the understanding of the concepts being explained.

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Analysis of airgap flux, current, and vibration signals as a function of the combination of static and dynamic airgap eccentricity in 3-phase induction motors

Cited by 414 publications

References 3 publications

Calculating an electromechanical torque of a squirrel cage motor based on an axial flux obtained by the FEM

Calculating an electromechanical torque of a squirrel cage motor based on an axial flux obtained by the FEM

Investigation of Static Eccentricity Fault Frequencies using Multiple Sensors in Induction Motors and Effects of Loading

Fault Diagnosis of Induction Motors, Introduction

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