The detection of inter-turn short circuits in the stator windings of operating motors

Joksimović, Gojko; Penman, J.

doi:10.1109/41.873216

Cited by 379 publications

(139 citation statements)

References 12 publications

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“…Partial discharge on-line monitoring systems Spectral analysis of stator current [12][13][14] Monitoring stator winding fault Judgment is not accurate, and it is related to load and power supply reliability Symmetrical component method [15,16] Monitoring of inter-turn short-circuit fault Insulation is not monitored Park vector analysis of stator current [17,18] Monitoring of inter-turn short-circuit fault Relationship between the ellipticity of the trajectory of (i d , i q ) and the fault is unclear…”

Section: Condition Monitoring Of Stators Of Pmsgsmentioning

confidence: 99%

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Overview of condition monitoring and operation control of electric power conversion systems in direct-drive wind turbines under faults

Huang

Xiao

et al. 2017

Front. Mech. Eng.

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Electric power conversion system (EPCS), which consists of a generator and power converter, is one of the most important subsystems in a direct-drive wind turbine (DD-WT). However, this component accounts for the most failures (approximately 60% of the total number) in the entire DD-WT system according to statistical data. To improve the reliability of EPCSs and reduce the operation and maintenance cost of DD-WTs, numerous researchers have studied condition monitoring (CM) and fault diagnostics (FD). Numerous CM and FD techniques, which have respective advantages and disadvantages, have emerged. This paper provides an overview of the CM, FD, and operation control of EPCSs in DD-WTs under faults. After introducing the functional principle and structure of EPCS, this survey discusses the common failures in wind generators and power converters; briefly reviewed CM and FD methods and operation control of these generators and power converters under faults; and discussed the grid voltage faults related to EPCSs in DD-WTs. These theories and their related technical concepts are systematically discussed. Finally, predicted development trends are presented. The paper provides a valuable reference for developing service quality evaluation methods and fault operation control systems to achieve high-performance and high-intelligence DD-WTs.

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Section: Condition Monitoring Of Stators Of Pmsgsmentioning

confidence: 99%

“…Park vector analysis of stator current Park vector analysis of the stator current can be conducted in inter-turn short-circuit fault monitoring [17,18]. Under normal conditions, the trajectory of (i d , i q ) is a circle.…”

Section: Condition Monitoring Of Stators Of Pmsgsmentioning

confidence: 99%

Overview of condition monitoring and operation control of electric power conversion systems in direct-drive wind turbines under faults

Huang

Xiao

et al. 2017

Front. Mech. Eng.

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“…A few decades ago, research sufficiently proved the feasibility of using the stator current to examine both the electrical and mechanical conditions of the electric machine, [1]- [3], [11]. Unfortunately, until today, the determination of severity-stages when specific mechanical faults are evolving is still lacking, [12].…”

Section: Introductionmentioning

confidence: 99%

Single point outer race bearing fault severity estimation using stator current measurements

Corne

Vervisch

Derammelaere

et al. 2017

2017 IEEE International Electric Machines and Drives Conference (IEMDC)

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Abstract-Although numerous valuable research has been conducted by many authors, the relation between evolving mechanical faults and their fault-indicating reflections in the electrical signals of rotating electric machinery still requires extensive attention. This lack of information implies serious obstructions in the evolution of applying motor current signature analysis as a complete and reliable condition monitoring technology. However, as previous research of the authors resulted in the construction of a unique test-bench where specific mechanical faults can be introduced into an 11kW induction machine with high reproducibility and accuracy, the relations between evolving mechanical faults and their reflections in the stator current can be investigated and quantified experimentally. Using this mechanical fault-emulator, experiments where conducted where the severity of a single point outer race bearing fault and its corresponding signature in the stator current's spectral fault-components are accurately analyzed. These evolving faulty components are trended and characterized, resulting in the desired quantification of the mechanical fault-severity. Based on these results, it is possible to inversely estimate the severity of single point outer race bearing problems by acquiring nothing more then the stator current timefunctions.

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“…By this approach, it is possible to analyze the behavior of any machine with any winding distribution and air gap length. Hence this method has gained a broad application in the analysis of faulty electrical machines, such as broken rotor bars [4] and fault condition in stator windings [5].…”

Section: Introductionmentioning

confidence: 99%

An Improved Analytical Model for Salient Pole Synchronous Machines Under General Eccentricity Fault

Akbari¹

2013

PIER B

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Abstract-This paper develops a more precise analytical model for calculating salient pole synchronous machine (SPSM) inductances in case of general eccentricity including static, dynamic and mixed eccentricities. The developed method is based on the modified winding function approach (MWFA) which accurately considers variable air gap function and leads to pure analytical expressions of inductances. Available analytical techniques, based on MWFA, approximate the air gap function and simplify the geometrical model of SPSM, whereas, in this study, the influence of the openings between the rotor salient poles has been taken into account by using an effective form of rotor pole shoes. Using this technique, flux fringing effect is considered. By taking into account machine geometry, type of windings connection and flux fringing effect, this method is able to model most of the important features of an eccentric SPSM. The developed analytical expressions can calculate time varying inductances of SPSMs with any eccentricity type and degree in the frame of a single program. Simulation results for static eccentricity are compared with experimental tests on a laboratory generator to verify accuracy of the proposed model.

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The detection of inter-turn short circuits in the stator windings of operating motors

Cited by 379 publications

References 12 publications

Overview of condition monitoring and operation control of electric power conversion systems in direct-drive wind turbines under faults

Overview of condition monitoring and operation control of electric power conversion systems in direct-drive wind turbines under faults

Single point outer race bearing fault severity estimation using stator current measurements

An Improved Analytical Model for Salient Pole Synchronous Machines Under General Eccentricity Fault

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