Hysteresis

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Hysteresis refers to systems that may exhibit path dependence, or "rate-independent memory". (Wikipedia.org)






Conferences related to Hysteresis

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2018 15th International Workshop on Advanced Motion Control (AMC)

1. Advanced Motion Control2. Haptics, Robotics and Human-Machine Systems3. Micro/Nano Motion Control Systems4. Intelligent Motion Control Systems5. Nonlinear, Adaptive and Robust Control Systems6. Motion Systems for Robot Intelligence and Humanoid Robotics7. CPG based Feedback Control, Morphological Control8. Actuators and Sensors in Motion System9. Motion Control of Aerial/Ground/Underwater Robots10. Advanced Dynamics and Motion Control11. Motion Control for Assistive and Rehabilitative Robots and Systems12. Intelligent and Advanced Traffic Controls13. Computer Vision in Motion Control14. Network and Communication Technologies in Motion Control15. Motion Control of Soft Robots16. Automation Technologies in Primary Industries17. Other Topics and Applications Involving Motion Dynamics and Control


2018 9th International Particle Accelerator Conference (IPAC)

Topics cover a complete survey of the field of charged particle accelerator science and technology and infrastructure.


2018 IEEE 18th International Power Electronics and Motion Control Conference (PEMC)

Promote and co-ordinate the exchange and the publication of technical, scientific and economic information in the field of Power Electronics and Motion Control with special focus on countries less involved in IEEE related activities. The main taget is to create a forum for industrial and academic community.

  • 2016 IEEE International Power Electronics and Motion Control Conference (PEMC)

    The IEEE Power Electronics and Motion Control (IEEE-PEMC) conference continues to be the oldest in Europe and is a direct continuation of the conferences held since 1970. Its main goal is to promote and co-ordinate the exchange and publication of technical, scientific and economic information on Power Electronics and Motion Control. One of its main objectives is the cooperation and integration between the long-time divided Western and Eastern Europe, this goal expressed in the conference logo, as well. The conference attracts now a large number (roughly 500+) of participants from the world. An exhibition is organised in parallel with every PEMC Conference, offering space for the industry to present their latest products for Power Electronics and Motion Control. In addition to the regular oral sessions, key notes, round tables, tutorials, workshops, seminars, exhibitions, the dialogue sessions (enlarged “poster” presentations) present to the speakers a better cooperation opportunity.

  • 2014 16th International Power Electronics and Motion Control Conference (PEMC)

    The purpose of the 16th International Power Electronics and Motion Control Conference and Exposition (PEMC) is to bring together researchers, engineers and practitioners from all over the world, interested in the advances of power systems, power electronics, energy, electrical drives and education. The PEMC seeks to promote and disseminate knowledge of the various topics and technologies of power engineering, energy and electrical drives. The PEMC aims to present the important results to the international community of power engineering, energy, electrical drives fields and education in the form of research, development, applications, design and technology. It is therefore aimed at assisting researchers, scientists, manufacturers, companies, communities, agencies, associations and societies to keep abreast of new developments in their specialist fields and to unite in finding power engineering issues.

  • 2012 EPE-ECCE Europe Congress

    Power Electronics and Motion Control.

  • 2010 14th International Power Electronics and Motion Control Conference (EPE/PEMC 2010)

    Semiconductor Devices and Packaging, Power Converters, Electrical Machines, Actuators, Motion Control, Robotics, Adjustable Speed Drives, Application and Design of Power Electronics circuits, Measurements, Sensors, Observing Techniques, Electromagnetic Compatibility, Power Electronics in Transportation, Mechatronics, Power Electronics in Electrical Energy Generation, Transmission and Distribution, Renewable Energy Sources, Active Filtering, Power Factor Correction

  • 2008 13th International Power Electronics and Motion Control Conference (EPE/PEMC 2008)

  • 2006 12th International Power Electronics and Motion Control Conference (EPE/PEMC 2006)


2018 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)

The conference will deal will all aspects of power electronics, motor drives and Power electronics applications to energy systems.


2017 IEEE/MTT-S International Microwave Symposium - IMS 2017

The IEEE MTT-S International Microwave Symposium (IMS) is the premier conference covering basic technologies, to passives and actives components to system over a wide range of frequencies including VHF, UHF, RF, microwave, millimeter-wave, terahertz, and optical. The conference will encompass the latest in RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation, wireless systems, RFID and related topics.

  • 2036 IEEE/MTT-S International Microwave Symposium - IMS 2036

    The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

  • 2031 IEEE/MTT-S International Microwave Symposium - IMS 2031

    The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

  • 2029 IEEE/MTT-S International Microwave Symposium - MTT 2029

    The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

  • 2026 IEEE/MTT-S International Microwave Symposium - IMS 2026

    The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

  • 2025 IEEE/MTT-S International Microwave Symposium - IMS 2025

    The IEEE International Microwave Symposium (IMS) is the world s foremost conferencecovering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies;encompassing everything from basic technologies to components to systems including thelatest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulationand more. The IMS includes technical and interactive sessions, exhibits, student competitions,panels, workshops, tutorials, and networking events.

  • 2024 IEEE/MTT-S International Microwave Symposium - IMS 2024

    The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

  • 2023 IEEE/MTT-S International Microwave Symposium - IMS 2023

    The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

  • 2022 IEEE/MTT-S International Microwave Symposium - IMS 2022

    The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

  • 2021 IEEE/MTT-S International Microwave Symposium - IMS 2021

    The IEEE MTT-S International Microwave Symposium (IMS) is the premier conference covering basic technologies, to passives and actives components to system over a wide range of frequencies including VHF, UHF, RF, microwave, millimeter-wave, terahertz, and optical. The conference will encompass the latest in RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation, wireless systems, RFID and related topics.

  • 2020 IEEE/MTT-S International Microwave Symposium - IMS 2020

    The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

  • 2019 IEEE/MTT-S International Microwave Symposium - MTT 2019

    Comprehensive symposium on microwave theory and techniques including active and passive circuit components, theory and microwave systems.

  • 2018 IEEE/MTT-S International Microwave Symposium - MTT 2018

    Microwave theory and techniques, RF/microwave/millimeter-wave/terahertz circuit design and fabrication technology, radio/wireless communication.

  • 2016 IEEE/MTT-S International Microwave Symposium - IMS 2016

    The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

  • 2015 IEEE/MTT-S International Microwave Symposium - MTT 2015

    The IEEE MTT-S International Microwave Symposium (IMS) is the premier conference covering basic technologies, to passives and actives components to system over a wide range of frequencies including VHF, UHF, RF, microwave, millimeter-wave, terahertz, and optical. The conference will encompass the latest in RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation, wireless systems, RFID and related topics. The IMS includes technical sessions, both oral and interactive, worksh

  • 2014 IEEE/MTT-S International Microwave Symposium - MTT 2014

    IMS2014 will cover developments in microwave technology from nano devices to system applications. Technical paper sessions, interactive forums, plenary and panel sessions, workshops, short courses, industrial exhibits, and a wide array of other technical activities will be offered.

  • 2013 IEEE/MTT-S International Microwave Symposium - MTT 2013

    The IEEE MTT-S International Microwave Symposium (IMS) is the premier conference covering basic technologies, to passives and actives components to system over a wide range of frequencies including VHF, UHF, RF, microwave, millimeter -wave, terahertz, and optical. The conference will encompass the latest in RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation, wireless systems, RFID and related topics.The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

  • 2012 IEEE/MTT-S International Microwave Symposium - MTT 2012

    The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

  • 2011 IEEE/MTT-S International Microwave Symposium - MTT 2011

    The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

  • 2010 IEEE/MTT-S International Microwave Symposium - MTT 2010

    Reports of research and development at the state-of-the-art of the theory and techniques related to the technology and applications of devices, components, circuits, modules and systems in the RF, microwave, millimeter-wave, submillimeter-wave and Terahertz ranges of the electromagnetic spectrum.

  • 2009 IEEE/MTT-S International Microwave Symposium - MTT 2009

    The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.

  • 2008 IEEE/MTT-S International Microwave Symposium - MTT 2008

  • 2007 IEEE/MTT-S International Microwave Symposium - MTT 2007

  • 2006 IEEE/MTT-S International Microwave Symposium - MTT 2006

  • 2005 IEEE/MTT-S International Microwave Symposium - MTT 2005

  • 2004 IEEE/MTT-S International Microwave Symposium - MTT 2004

  • 2003 IEEE/MTT-S International Microwave Symposium - MTT 2003

  • 2002 IEEE/MTT-S International Microwave Symposium - MTT 2002

  • 2001 IEEE/MTT-S International Microwave Symposium - MTT 2001

  • 2000 IEEE/MTT-S International Microwave Symposium - MTT 2000

  • 1999 IEEE/MTT-S International Microwave Symposium - MTT '99

  • 1998 IEEE/MTT-S International Microwave Symposium - MTT '98

  • 1997 IEEE/MTT-S International Microwave Symposium - MTT '97

  • 1996 IEEE/MTT-S International Microwave Symposium - MTT '96


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Periodicals related to Hysteresis

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Applied Superconductivity, IEEE Transactions on

Contains articles on the applications and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Power applications include magnet design as well asmotors, generators, and power transmission


Automatic Control, IEEE Transactions on

The theory, design and application of Control Systems. It shall encompass components, and the integration of these components, as are necessary for the construction of such systems. The word `systems' as used herein shall be interpreted to include physical, biological, organizational and other entities and combinations thereof, which can be represented through a mathematical symbolism. The Field of Interest: shall ...


Circuits and Systems for Video Technology, IEEE Transactions on

Video A/D and D/A, display technology, image analysis and processing, video signal characterization and representation, video compression techniques and signal processing, multidimensional filters and transforms, analog video signal processing, neural networks for video applications, nonlinear video signal processing, video storage and retrieval, computer vision, packet video, high-speed real-time circuits, VLSI architecture and implementation for video technology, multiprocessor systems--hardware and software-- ...


Control Systems Technology, IEEE Transactions on

Serves as a compendium for papers on the technological advances in control engineering and as an archival publication which will bridge the gap between theory and practice. Papers will highlight the latest knowledge, exploratory developments, and practical applications in all aspects of the technology needed to implement control systems from analysis and design through simulation and hardware.


Device and Materials Reliability, IEEE Transactions on

Provides leading edge information that is critical to the creation of reliable electronic devices and materials, and a focus for interdisciplinary communication in the state of the art of reliability of electronic devices, and the materials used in their manufacture. It focuses on the reliability of electronic, optical, and magnetic devices, and microsystems; the materials and processes used in the ...


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Most published Xplore authors for Hysteresis

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Xplore Articles related to Hysteresis

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Investigation of Neel Effect technology for current sensors in next-generation aeronautical applications

Arezki Bouzourene; Taoufik Bensalah; Lionel Cima; André Couderette Proceedings of the 2011 14th European Conference on Power Electronics and Applications, 2011

This paper deals with disruptive current-sensor technology for next-generation aeronautical applications. Sensors based on the Neel Effect principle are being developed using superparamagnetic nanostructured materials. The magnetic and mechanical proprieties of the raw material bring significant improvements in performance compared to conventional sensors. After reviewing the need to improve existing sensor technologies, the first section of this paper presents the ...


DC-DC converter with fast transient response and high efficiency for low-voltage microprocessor loads

B. Arbetter; D. Maksimovic Applied Power Electronics Conference and Exposition, 1998. APEC '98. Conference Proceedings 1998., Thirteenth Annual, 1998

The paper describes a DC-DC power converter for use with low voltage microprocessor loads. The control method is a hysteretic current-mode control in the continuous conduction mode which has fast transient response. At light loads, the power converter operates in the discontinuous conduction mode using a peak current control method which causes the switching frequency to be proportional to load ...


Special class of positive definite functions for formulating adaptive micro/nano manipulator control

Hwee Choo Liaw; D. Oetomo; G. Alici; B. Shirinzadeh 9th IEEE International Workshop on Advanced Motion Control, 2006., 2006

This paper presents a special class of positive definite functions for the formulation of adaptive control strategies, specifically in the research of an effective control algorithm for piezoelectric actuation systems in micro/nano manipulation. To deal with the control problems of unknown system parameters, nonlinear hysteresis effects, and disturbances in the piezoelectric actuation systems, an adaptive control methodology is proposed. Using ...


TILAS: A Simple Analysis Tool for Estimating Power Losses in an IGBT-Diode Pair under Hysteresis Control in Three-Phase Inverters

Ali M. Bazzi; Jonathan W. Kimball; Kevin Kepley; Philip T. Krein 2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition, 2009

Several techniques for analyzing and estimating power losses in insulated-gate bipolar transistors (IGBTs), diodes, MOSFETs, and other power electronics switching devices are known. Most of the approaches in the literature deal with periodic pulse width modulation (PWM) switching schemes. This paper presents a simple analysis tool to estimate these losses under aperiodic switching schemes, e.g. hysteresis. The tool aims to ...


Hysteresis modeling and compensation in a magnetostrictive actuator

Jong-Kwan Jung; Young-Woo Park 2008 International Conference on Control, Automation and Systems, 2008

Conventional electromechanical systems have some difficulty to adapt to the precise system, so there are many researches about smart actuators, which have great advantages in nano-position system and efficiency. However, they exhibit hysteresis nonlinearities that could affect to the precise control of actuators. So mathematical modeling of hysteresis is essential to apply smart materials to actuators. Hysteresis can be modeled ...


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Educational Resources on Hysteresis

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eLearning

Investigation of Neel Effect technology for current sensors in next-generation aeronautical applications

Arezki Bouzourene; Taoufik Bensalah; Lionel Cima; André Couderette Proceedings of the 2011 14th European Conference on Power Electronics and Applications, 2011

This paper deals with disruptive current-sensor technology for next-generation aeronautical applications. Sensors based on the Neel Effect principle are being developed using superparamagnetic nanostructured materials. The magnetic and mechanical proprieties of the raw material bring significant improvements in performance compared to conventional sensors. After reviewing the need to improve existing sensor technologies, the first section of this paper presents the ...


DC-DC converter with fast transient response and high efficiency for low-voltage microprocessor loads

B. Arbetter; D. Maksimovic Applied Power Electronics Conference and Exposition, 1998. APEC '98. Conference Proceedings 1998., Thirteenth Annual, 1998

The paper describes a DC-DC power converter for use with low voltage microprocessor loads. The control method is a hysteretic current-mode control in the continuous conduction mode which has fast transient response. At light loads, the power converter operates in the discontinuous conduction mode using a peak current control method which causes the switching frequency to be proportional to load ...


Special class of positive definite functions for formulating adaptive micro/nano manipulator control

Hwee Choo Liaw; D. Oetomo; G. Alici; B. Shirinzadeh 9th IEEE International Workshop on Advanced Motion Control, 2006., 2006

This paper presents a special class of positive definite functions for the formulation of adaptive control strategies, specifically in the research of an effective control algorithm for piezoelectric actuation systems in micro/nano manipulation. To deal with the control problems of unknown system parameters, nonlinear hysteresis effects, and disturbances in the piezoelectric actuation systems, an adaptive control methodology is proposed. Using ...


TILAS: A Simple Analysis Tool for Estimating Power Losses in an IGBT-Diode Pair under Hysteresis Control in Three-Phase Inverters

Ali M. Bazzi; Jonathan W. Kimball; Kevin Kepley; Philip T. Krein 2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition, 2009

Several techniques for analyzing and estimating power losses in insulated-gate bipolar transistors (IGBTs), diodes, MOSFETs, and other power electronics switching devices are known. Most of the approaches in the literature deal with periodic pulse width modulation (PWM) switching schemes. This paper presents a simple analysis tool to estimate these losses under aperiodic switching schemes, e.g. hysteresis. The tool aims to ...


Hysteresis modeling and compensation in a magnetostrictive actuator

Jong-Kwan Jung; Young-Woo Park 2008 International Conference on Control, Automation and Systems, 2008

Conventional electromechanical systems have some difficulty to adapt to the precise system, so there are many researches about smart actuators, which have great advantages in nano-position system and efficiency. However, they exhibit hysteresis nonlinearities that could affect to the precise control of actuators. So mathematical modeling of hysteresis is essential to apply smart materials to actuators. Hysteresis can be modeled ...


More eLearning Resources

IEEE-USA E-Books

  • Magnetic Properties of Materials for MRAM

    _This chapter reviews the main materials used in magnetic random¿¿¿access memory and their properties. It explains the basic concepts of practical magnetic tunnel junctions, including ferromagnets, antiferromagnets, magnetic anisotropy, exchange bias, interlayer exchange coupling, and synthetic antiferromagnetic structures. The chapter covers the magnetotransport properties of giant magnetoresistive multilayers as well as of magnetic tunnel junctions with either an amorphous aluminum oxide or a crystalline magnesium oxide tunnel barrier_.

  • Calculation of Induction Machine Losses

    The computation of losses is the most difficult and challenging aspect of machine design. The power losses in an induction motor can be relegated to five elements. Stator conductor loss, rotor conductor loss, iron loss, stray‐load loss, friction and windage loss. The increase of rotor resistance has a beneficial effect in aiding starting capability of squirrel‐cage induction machines and nearly all conventional machine designs enhance motor starting capability by specially selected rotor bar shapes. The calculation of iron losses associated with the rotor teeth are again found by adding up the losses in each rotor tooth, properly weighting the terms by the sine of the location of the tooth with respect to a pole pitch. The windage losses are produced by rotation and depend upon the peripheral speed of the rotor, the rotor diameter, the core length and generally upon the construction of the machine.

  • Magnetic Core Loss

    This chapter focuses on calculating the losses within a magnetic material. These losses arise from several causes. Eddy currents induced by the time rate of change of flux in the material are one source of loss. A second source of loss is magnetic hysteresis, which is associated with the non-uniquely valued relationship between flux density and field intensity. The chapter considers a variety of empirical or behavioral approaches to modeling core loss. These are based on representing observed behavior in a mathematical form using curve fitting. The chapter also considers some other approaches to the modeling of hysteresis behavior. These include Jiles-Atherton model and the Preisach model. These are time domain models that predict the specific B-H trajectory. They offer significantly more information than the empirical models.

  • Magnetic Actuators Operated by AC

    Since alternating current (AC) voltage is commonly available, many magnetic actuators are designed for AC operation. In most cases, the direct current (DC) actuators must be substantially modified for AC operation. This chapter discusses the issues that are needed to be considered for AC-operated magnetic actuators. Separate sections are devoted to the concepts of skin depth, power losses in laminated steel, equivalent circuit and solid steel, force pulsations, and cuts in steel.

  • HBFEM and Its Future Applications

    By using the harmonic balance-finite element method (HBFEM) approach, magnetic nonlinear characteristics, hysteresis losses, eddy current losses, and magnetic flux distribution for each harmonic component can be calculated and presented. HBFEM can provide magnetic flux distribution and eddy current losses at each harmonic. The calculation method of the electromagnetic coupling is implemented by combining the electric circuit, which reflects characteristics of the ports, with the magnetic circuit and the internal magnetic field's distribution. Considering the periodic characteristics of electromagnetic fields under steady-state excitation, a limited Fourier series is used to represent the periodic behavior of the steady-state variables, and solving equations in the time domain can be avoided. The harmonic balance method is the effective method for obtaining the approximate periodic solution of a nonlinear differential equation. The magnetic circuit model established from the geometric structure of the power transformer can be used to calculate and analyze non-linear electromagnetic problems, considering the coupled electric circuits.

  • Nonlinear Electromagnetic Field and Its Harmonic Problems

    Harmonics are mainly generated from both the component level i.e., nonlinear magnetic or dielectric components and the circuit level, including power electronic circuits. This chapter illustrates the examples of load current waveforms with harmonics. To understand harmonic distribution in the transformer the excitation voltage and magnetic flux waveforms and associated current waveforms should be investigated. The chapter discusses the impact of harmonics on renewable energy and microgrid systems. Power electronic devices, as used for renewable energy systems and microgrids, might be able to cause harmonics. Since harmonic loading, direct current (DC) injection, voltage ripple, and voltage range of operation are key areas that influence the operation of the transformer in renewable energy and microgrid systems, the harmonic balance finite element method (HBFEM) is an effective method to analyze the harmonic problem in the transformer connected with voltage or current sources.

  • Magnetic Circuits and Transformers

    This chapter contains basic concepts that can be used for all rotating machines and for power transformers. It presents a more complete analysis and more detailed circuit models of real-life transformers. When the transformer operates in sinusoidal steady state, the corresponding phasor circuit can be used to analyse it. Three-phase transformers can have different construction modes. The chapter briefly presents only the transformers created as a three- phase bank of single-phase transformers. Magnetic hysteresis is important also from an energy point of view: it can be demonstrated that hysteresis phenomenon implies loss of energy in the magnetic circuit of the transformer, which reduces efficiency and heats the iron.

  • Mobility

    This chapter contains sections titled: Introduction Mobility Management in Idle State Intra‐LTE Handovers Inter‐system Handovers Differences in E‐UTRAN and UTRAN Mobility Summary References

  • 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.

  • Permanent Magnet Machines

    This chapter aims to relate the operational requirements of permanent magnet (PM) motors to their dimensions, shapes, and material properties. It describes how the physical dimensions and parameters are influenced by PM excitation. The chapter summarizes the major parameters of the motor circuit model. It shows the conventional steady‐state equivalent circuit for a PM motor. In this representation, the MMF produced by the magnet is represented as a current source If. The surface‐magnet machine is only one of a wide variety of magnet configurations used for PM machines. Structurally, this construction can provide a more secure magnet setting. The motor can also produce somewhat more maximum torque and its overspeed range is larger due to its saliency. The largest family of PM machine involves those with buried magnets. The chapter shows some of the possibilities. It discusses several typical examples of these machines to illustrate the issues involved.



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