Magnetic flux leakage

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Magnetic flux leakage (MFL) is a magnetic method of nondestructive testing that is used to detect corrosion and pitting in steel structures, most commonly pipelines and storage tanks. (Wikipedia.org)






Conferences related to Magnetic flux leakage

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INTERMAG 2014 - IEEE International Magnetics Conference

Intermag is the premier conference on applied magnetics which allows scientists and engineers from all over to world to meet and discuss novel developments in magnetics, magnetic materials and associated technologies.


2013 6th International Symposium on Computational Intelligence and Design (ISCID)

Computational Intelligence techniques typically include Fuzzy Logic, Evolutionary Computation, Intelligent Agent Systems, Neural Networks, Cellular Automata, Artificial Immune Systems and other similar computational models.


2013 IEEE International Conference on Mechatronics and Automation (ICMA)

The objective of ICMA 2013 is to provide a forum for researchers, educators, engineers, and government officials involved in the general areas of mechatronics, robotics, automation and sensors to disseminate their latest research results and exchange views on the future research directions.


2013 IEEE Symposium on Industrial Electronics & Applications (ISIEA)

The symposium covers the areas of industrial electronics and industrial applications in general, that include areas of electronics engineering and its applications, computer engineering and applications, processing, mechatronics, instrumentation, measurement, and their applications in the humanities & commercial

  • 2012 IEEE Symposium on Industrial Electronics and Applications (ISIEA 2012)

    This annual symposium is to bring together scientists, engineers and postgraduates who work in these fields; to share their ideas and experience. Papers are solicited on recent research results, new developments and technology trends in the field of power electronics, industrial electronics, industrial applications, life-science applications, computer & network applications, measurement systems, business applications and ocean applications related technology.

  • 2011 IEEE Symposium on Industrial Electronics and Applications (ISIEA 2011)

    This annual symposium is to bring together scientists, engineers and postgraduates who work in these fields; to share their ideas and experience. Papers are solicited on recent research results, new developments and technology trends in the field of power electronics, industrial electronics, industrial applications, life-science applications, computer & network applications, measurement systems, business applications and ocean applications related technology.

  • 2010 IEEE Symposium on Industrial Electronics and Applications (ISIEA 2010)

    This annual symposium is to bring together scientists, engineers and postgraduates who work in these fields; to share their ideas and experience. Papers are solicited on recent research results, new developments and technology trends in the field of power electronics, industrial electronics, industrial applications, life-science applications, computer & network applications, measurement systems, business applications and ocean applications related technology.


2013 International Conference on Electrical Machines and Systems (ICEMS)

Main Topics1) PM, DC Machines and Drives2) Power Converters/Inverters3) Induction Machines and Drives4) Synchronous Machines and Drives5) Linear Machines and Magnetic Levitation6) Special Machines and Applications7) Renewable Energy and Related Topics8) Field Analysis and Computational Method9) Motion Control10) Fault and Diagnosis11) Designing, Manufacturing, Testing and Standards12) Transformers and High Voltage Machines13) OthersSpecial Topics1) High Speed Machine and Drives2) Personal Mobility3) EMI/EMC4) High Speed Train5) xEVs and Applications6) In-wheel Motors and Drives7) x-by-wire TechnologySpecial Topics1. High Speed Machine and Drives2. Personal Mobility3. In-wheel Motors and Drives4. x-by-wire Technology5. Electric Propulsion6. High Speed Train

  • 2012 15th International Conference on Electrical Machines and Systems (ICEMS)

    The conference will provide a big opportunity for researchers and professionals from all over the world to present the latest researches and developments and to exchange useful information and experiences in the fields of electrical machines and systems such as motor drive systems, turbine generators, linear machines, transformers, electric vehicles, renewable energy, power converters, etc.

  • 2011 International Conference on Electrical Machines and Systems (ICEMS)

    Electrical machines, power electronics and systems.

  • 2010 International Conference on Electrical Machines and Systems (ICEMS)

    1) Power Converters/Inverters 2) Systems for Renewable Energy 3) Motor Drives 4) PM Machines and DC Machines 5) Induction, Synchronous Machines 6) Transformers and High Voltage Machines 7) Linear Machines 8) Special Machines and Their Applications 9) Field Analysis and optimal Design Technologies 10) Electrical Technologies for the Next Generation Vehicle

  • 2009 International Conference on Electrical Machines and Systems (ICEMS)

    The aims of ICEMS2009 are to provide an opportunity for scientists and experts to present the latest research developments in the field of electrical machines and systems (rotating and other machines, power electronics, motion control, and motor drives) and to exchange useful information and experiences in research, trends and applications.

  • 2008 International Conference on Electrical Machines and Systems (ICEMS)

    The conference is a forum for specialists and engineers engaged in the field of electrical machines and drive systems to exchange their latest achievements and experiences of developments, trends and applications.

  • 2007 International Conference on Electrical Machines and Systems (ICEMS)

    MAIN TOPICS 1) Power Converters/Inverters 2) DC-DC Converters 3) Power Conditioning Systems for Renewable Energy 4) Motor Drives 5) PM Machines and DC Machines 6) Induction, Synchronous Machines 7) Transformers and Reactors 8) High Voltage Machines 9) Field Analysis and Optimal Design Technologies 10) Special Machines and Their Applications SPECIAL TOPICS 1) Status and Progress in Maglev Technology 2) Intelligent Mechatronics for Robotics and Advanced Vehicles (HEV & FCEV)


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Periodicals related to Magnetic flux leakage

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Magnetics, IEEE Transactions on

Science and technology related to the basic physics and engineering of magnetism, magnetic materials, applied magnetics, magnetic devices, and magnetic data storage. The Transactions publishes scholarly articles of archival value as well as tutorial expositions and critical reviews of classical subjects and topics of current interest.



Most published Xplore authors for Magnetic flux leakage

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Xplore Articles related to Magnetic flux leakage

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A Power Supply of Self-Powered Online Monitoring Systems for Power Cords

Zhiyi Wu; Yumei Wen; Ping Li IEEE Transactions on Energy Conversion, 2013

This paper presents a power supply of self-powered online monitoring systems for power cords. The proposed power supply obtains energy from the magnetic field induced by wire-carrying currents using a specially designed coil-based magnetic energy harvester (CMEH). The CMEH reduces the influence of the magnetic flux leakage and can harvest enough energy, especially when the wire- carrying current is small. ...


Multiwavelength Fiber Lasers Based on SOA and Double-pass Mach-Zehnder Interferometer

Zhengqian Luo; Wen-De Zhong; Yang Jing Wen; Zhiping Cai; Chenchun Ye 2008 IEEE PhotonicsGlobal@Singapore, 2008

Using a direct double-pass and an isolator-assisted double-pass waveguide- based Mach-Zehnder interferometer (MZI), we demonstrate high-performance SOA- based multiwavelength fiber ring lasers with respective channel spacing of 21.5 GHz and 43 GHz. By changing the fiber ring cavity loss of direct double- pass MZI based configuration, we show that over one hundred of lasing wavelengths in the C- or L-band ...


Monitoring system of ecologically unsafe objects based on microwave gauges

A. Y. Zaytsev; O. P. Kovbasa; V. O. Shayda Microwave Conference, 1999. Microwave & Telecommunication Technology. 1999 9th International Crimean [In Russian with English abstracts], 1999

Technical characteristics of a system for ecologically unsafe objects are given. Measured parameters are fluid level, displacement, temperature and pressure. The system includes up to 64 precise 8-mm gauges with quasi- continuous emission. Gauges are linked to a central block through RS-485 interface. For large distances, radio-channel or dial-up lines can be used for communications.


Thrust characteristic of spiral motor using fem analysis and compensation for thrust fluctuation

Hyuk-jin Kwon; Y. Fujimoto 9th IEEE International Workshop on Advanced Motion Control, 2006., 2006

We propose a six-phase spiral type motor that had higher thrust characteristics than linear motor's. This motor generates torque around it's axis and thrust in the axial direction only by electromagnetic force. Because no additional hardware is required for straight-line movement, this type of motors has less friction. Simulation results based on finite-element method (FEM) analysis certifies that this type ...


Broken wire detection in stay cables based on guided waves

Jiang Xu; Huan Tang; Xinjun Wu; Anran Ben; Yihua Kang 2010 International Conference on Mechanic Automation and Control Engineering, 2010

There are over 200 cable-stayed bridges in China. Damage detection for stay cables is an urgent problem. The broken wire detection is investigated based on the magnetostrictive guided wave technology by experimentally. Two custom- built stay cables with several broken wire flaws are detected by a magnetostrictive guided wave testing system. The results indicate that the method could detect broken ...


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Educational Resources on Magnetic flux leakage

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eLearning

A Power Supply of Self-Powered Online Monitoring Systems for Power Cords

Zhiyi Wu; Yumei Wen; Ping Li IEEE Transactions on Energy Conversion, 2013

This paper presents a power supply of self-powered online monitoring systems for power cords. The proposed power supply obtains energy from the magnetic field induced by wire-carrying currents using a specially designed coil-based magnetic energy harvester (CMEH). The CMEH reduces the influence of the magnetic flux leakage and can harvest enough energy, especially when the wire- carrying current is small. ...


Multiwavelength Fiber Lasers Based on SOA and Double-pass Mach-Zehnder Interferometer

Zhengqian Luo; Wen-De Zhong; Yang Jing Wen; Zhiping Cai; Chenchun Ye 2008 IEEE PhotonicsGlobal@Singapore, 2008

Using a direct double-pass and an isolator-assisted double-pass waveguide- based Mach-Zehnder interferometer (MZI), we demonstrate high-performance SOA- based multiwavelength fiber ring lasers with respective channel spacing of 21.5 GHz and 43 GHz. By changing the fiber ring cavity loss of direct double- pass MZI based configuration, we show that over one hundred of lasing wavelengths in the C- or L-band ...


Monitoring system of ecologically unsafe objects based on microwave gauges

A. Y. Zaytsev; O. P. Kovbasa; V. O. Shayda Microwave Conference, 1999. Microwave & Telecommunication Technology. 1999 9th International Crimean [In Russian with English abstracts], 1999

Technical characteristics of a system for ecologically unsafe objects are given. Measured parameters are fluid level, displacement, temperature and pressure. The system includes up to 64 precise 8-mm gauges with quasi- continuous emission. Gauges are linked to a central block through RS-485 interface. For large distances, radio-channel or dial-up lines can be used for communications.


Thrust characteristic of spiral motor using fem analysis and compensation for thrust fluctuation

Hyuk-jin Kwon; Y. Fujimoto 9th IEEE International Workshop on Advanced Motion Control, 2006., 2006

We propose a six-phase spiral type motor that had higher thrust characteristics than linear motor's. This motor generates torque around it's axis and thrust in the axial direction only by electromagnetic force. Because no additional hardware is required for straight-line movement, this type of motors has less friction. Simulation results based on finite-element method (FEM) analysis certifies that this type ...


Broken wire detection in stay cables based on guided waves

Jiang Xu; Huan Tang; Xinjun Wu; Anran Ben; Yihua Kang 2010 International Conference on Mechanic Automation and Control Engineering, 2010

There are over 200 cable-stayed bridges in China. Damage detection for stay cables is an urgent problem. The broken wire detection is investigated based on the magnetostrictive guided wave technology by experimentally. Two custom- built stay cables with several broken wire flaws are detected by a magnetostrictive guided wave testing system. The results indicate that the method could detect broken ...


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IEEE-USA E-Books

  • Principles of Magnetic-Circuit Computations

    This chapter contains sections titled: Units for Practical Magnetic Calculations, Calculations for Magnetic Paths Wholly in Iron, Illustrative Example of Calculations for Magnetic Structure of Uniform Material and Cross- Sectional Area, Illustrative Examples of Calculations for Magnetic Structure of Uniform Material and Nonuniform Cross-Sectional Area, Occurence of Air Gaps in Ferromagnetic Circuits, Fringing and Leakage Fluxes, Methods of Calculations for Short Air Gaps, Illustrative Example of Calculations for a Simple Ferromagnetic Circuit with a Short Air Gap, Illustrative Examples of Calculations for Series-Parallel Iron and Short Air-Gap Paths, Calculations for Long Air Gaps and for Leakage Flux Paths, Illustrative Example of Calculations of Leakage Flux for the Magnetic Circuit of an Oscillograph, Calculations of the Magnetization Curve of a Direct-Current Dynamo, Problems

  • Distributed Windings and Rotating Electric Machinery

    This chapter focuses on a complicated winding arrangement known as a distributed winding, which is often used in rotating electric machinery. In these machines, the goal is to establish a continuously rotating set of north and south poles on the stator, which interact with an equal number of north and south poles on the rotor, to produce uniform torque. The winding function has three important uses. First, it is useful in determining the MMF caused by distributed windings. Second, it is used to determine how much flux links a winding. Third, the winding function is instrumental in calculating winding inductances. The chapter talks about the air-gap magnetomotive force (MMF). It explains the calculation of inductances of distributed windings. The problem of the computation of leakage inductance of a stator winding and the problem of finding the resistance of a distributed winding are considered.

  • HBFEM for Nonlinear Magnetic Field Problems

    This chapter discusses mainly the numerical modeling and analysis of electromagnetic fields in switching power supplies. It uses harmonic balance analysis, combined with the finite element method (FEM), to solve problems arising from non-linear, harmonic, eddy-current and power loss problems of transformers used in switching power supplies. The chapter also discusses the harmonic balance-FEM (HBFEM) model and computed results, compared with experimental results. The harmonic components of current and magnetic flux can help to accurately analyze and design the magnetic core and winding structures, and further determine the power loss and leakage flux in the magnetic system. The numerical model of voltage excitation with a nonlinear magnetic field is more accurate than conventional magnetic field-only analysis. The EM full wave solution can be obtained from HBFEM based numerical computation. To verify the HBFEM based solution, a single-phase direct current (DC)-biased switching transformer with a voltage source driven model is used.

  • Magnetic Leakage in Transformers

    This chapter contains sections titled: Magnetic Leakage at no Load, Voltage Equations and Flux Distribution Under Load, Leakage Inductances, Exciting and Load Components of the Primary Current, An Equivalent Circuit, Effects of the Iron Core and Simplifying Approximations, Problems

  • Magnetics and Magnetic Equivalent Circuits

    This chapter sets forth the background needed to analyze electromagnetic and electromechanical systems. It includes a review of magnetics, particularly magnetostatics. The notion of magnetic equivalent circuits is explored as a fairly accurate technique for the analysis of magnetic systems. The chapter talks about (a) Ampere's law, and the relationship between magnetomotive force (MMF) sources and MMF drops in the form of Kirchhoff's MMF law, (b) the relationship between fluxes going into a common volume or node that is governed by Kirchhoff's flux law, and (c) Ohm's law for magnetic equivalent circuits. A section describes the relationship between the magnetic equivalent circuit and the corresponding electric equivalent circuit, and highlights the concepts of flux linkage and inductance. It explains leakage permeance so as to create a more accurate magnetic model, and the flux path. The final section of the chapter discusses finite element analysis (FEA), another technique for magnetic analysis.

  • Bibliography

    This chapter contains sections titled: Theory of Magnetism (Chapter I), Properties of Ferromagnetic Materials (Chapter I), Magnetic Testing (Chapters I, V), Iron-Core Reactors; Transformer Excitation Characteristics; Model Theory (Chapters VI, VII), Thermal Characteristics of Electric Apparatus (Chapter VIII), Textbooks on Transformers, Physical Features of Transformers (Chapter XI), Insulation and Surge Phenomena, Magnetic Flux Distribution and Leakage Impedance (Chapters XII, XIII, XIV), Voltage Regulation, Losses, Rating, and Thermal Characteristics (Chapter XIV), Economy in Power-System Transformer Applications (Chapter XVI), Communication Transformers (Chapters XVII, XVIII, XX), Instrument Transformers (Chapter XIX), Voltage-Regulating Transformers (Chapter XIX), Harmonic Phenomena in Three-Phase Circuits (Chapter XXIII), Unbalanced Conditions in Three-Phase Transformer Banks(Chapter XXIV), Multicircuit Transformers (Chapter XXVII), Phase Transformation; Parallel Operation of Transformers (Chapters XXVIII, XXIX)



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