Conferences related to Bars

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2023 Annual International Conference of the IEEE Engineering in Medicine & Biology Conference (EMBC)

The conference program will consist of plenary lectures, symposia, workshops and invitedsessions of the latest significant findings and developments in all the major fields of biomedical engineering.Submitted full papers will be peer reviewed. Accepted high quality papers will be presented in oral and poster sessions,will appear in the Conference Proceedings and will be indexed in PubMed/MEDLINE.


ICC 2021 - IEEE International Conference on Communications

IEEE ICC is one of the two flagship IEEE conferences in the field of communications; Montreal is to host this conference in 2021. Each annual IEEE ICC conference typically attracts approximately 1,500-2,000 attendees, and will present over 1,000 research works over its duration. As well as being an opportunity to share pioneering research ideas and developments, the conference is also an excellent networking and publicity event, giving the opportunity for businesses and clients to link together, and presenting the scope for companies to publicize themselves and their products among the leaders of communications industries from all over the world.


2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe)

Energy conversion and conditioning technologies, power electronics, adjustable speed drives and their applications, power electronics for smarter grid, energy efficiency,technologies for sustainable energy systems, converters and power supplies


2020 IEEE International Conference on Image Processing (ICIP)

The International Conference on Image Processing (ICIP), sponsored by the IEEE SignalProcessing Society, is the premier forum for the presentation of technological advances andresearch results in the fields of theoretical, experimental, and applied image and videoprocessing. ICIP 2020, the 27th in the series that has been held annually since 1994, bringstogether leading engineers and scientists in image and video processing from around the world.


2020 IEEE International Conference on Plasma Science (ICOPS)

IEEE International Conference on Plasma Science (ICOPS) is an annual conference coordinated by the Plasma Science and Application Committee (PSAC) of the IEEE Nuclear & Plasma Sciences Society.


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Periodicals related to Bars

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Antennas and Propagation, IEEE Transactions on

Experimental and theoretical advances in antennas including design and development, and in the propagation of electromagnetic waves including scattering, diffraction and interaction with continuous media; and applications pertinent to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques.


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


Audio, Speech, and Language Processing, IEEE Transactions on

Speech analysis, synthesis, coding speech recognition, speaker recognition, language modeling, speech production and perception, speech enhancement. In audio, transducers, room acoustics, active sound control, human audition, analysis/synthesis/coding of music, and consumer audio. (8) (IEEE Guide for Authors) The scope for the proposed transactions includes SPEECH PROCESSING - Transmission and storage of Speech signals; speech coding; speech enhancement and noise reduction; ...


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 ...


Biomedical Circuits and Systems, IEEE Transactions on

The Transactions on Biomedical Circuits and Systems addresses areas at the crossroads of Circuits and Systems and Life Sciences. The main emphasis is on microelectronic issues in a wide range of applications found in life sciences, physical sciences and engineering. The primary goal of the journal is to bridge the unique scientific and technical activities of the Circuits and Systems ...


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Most published Xplore authors for Bars

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Xplore Articles related to Bars

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Influence of slot radial magnetic field on circulating current in stator transposition strands of large turbogenerator

2015 IEEE International Magnetics Conference (INTERMAG), 2015

In large turbogenerators, the stator bars are made of several parallel strands which are connected together in end region. Because of the disparity of electromotive force between every two strands in the same bar, circulating current flows around a close-cycle and inevitably leads to useless circulating current losses, generating heat. Thus the transposition must be used in strands to avoid ...


Validation and Evaluation for Visual Attention Models

Selective Visual Attention: Computational Models and Applications, None

This chapter assesses the performance of the saliency detection models described in the previous chapters. As with many other cases in engineering, a developed visual attention model needs to be critically benchmarked against other models, and then fully tested before being used in particular applications and situations. A number of qualitative and quantitative evaluation methods, as well as related ground-truth ...


Optimization of Transposition in Stator Bars of Hydro-Generators

2012 Sixth International Conference on Electromagnetic Field Problems and Applications, 2012

Large-scale generators tend to have high power density. In hydro-generators, stator windings commonly use Roebel bars in which strands are transposed in slot region to suppress circulating currents between strands. The Roebel bar allows increasing machine efficiency, and consequently energy savings. But in end regions of stator windings, the unbalanced leakage fluxes still produce circulating currents. To alleviate the circulating ...


Reactance of square tubular bus bars

Electrical Engineering, 1938

SQUARE tubular bus bars are coming into use to an increasing extent, as they are economical and convenient for joining to insulators and to branch circuits. The reactance of bus-bar circuits is frequently of importance, in order to compute the voltage drop under normal conditions and the current under short-circuit conditions. The purpose of this paper is to present formulas ...


Development Process of Vibration Sparking Erosion on Stator Bars

2018 IEEE Electrical Insulation Conference (EIC), 2018

Vibration sparking can cause serious erosion and deterioration of the stator bar insulation. A circuit model of the semi-conductive layer of a stator bar is proposed to describe the parameters of VS generation and the distribution of the parasitic current along the semi-conductive layer. A simulated VS system was set up to generate VS activity. This paper investigated the development ...


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Educational Resources on Bars

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IEEE-USA E-Books

  • Influence of slot radial magnetic field on circulating current in stator transposition strands of large turbogenerator

    In large turbogenerators, the stator bars are made of several parallel strands which are connected together in end region. Because of the disparity of electromotive force between every two strands in the same bar, circulating current flows around a close-cycle and inevitably leads to useless circulating current losses, generating heat. Thus the transposition must be used in strands to avoid the circulating current, such as 540° transposition, void transposition, incomplete transposition, extended transposition, twin transposition bars and mixed transposition bars. How to ascertain the appropriate transposition type among so many transposition types depends on the calculation of circulating current.

  • Validation and Evaluation for Visual Attention Models

    This chapter assesses the performance of the saliency detection models described in the previous chapters. As with many other cases in engineering, a developed visual attention model needs to be critically benchmarked against other models, and then fully tested before being used in particular applications and situations. A number of qualitative and quantitative evaluation methods, as well as related ground-truth databases, are introduced in this chapter. Common benchmarks include simple man-made visual patterns, human-labelled images and eye tracking data, which are first given in Sections 6.1-6.3. The quantifying estimation of performance of the computational models is listed in Sections 6.4-6.6. The most commonly used criteria are PPV, TPR, F-measure, ROC and AUC, as introduced in Section 6.4. The statistical criteria for both static and dynamic scene - NNS and KL distance - are presented in Section 6.5. Then Section 6.6 shows the criterion of Spearman's rank-order correlation with visual conspicuity. Each type of ground-truth, the associated evaluation methods and their advantages and disadvantages are discussed whenever needed and possible.

  • Optimization of Transposition in Stator Bars of Hydro-Generators

    Large-scale generators tend to have high power density. In hydro-generators, stator windings commonly use Roebel bars in which strands are transposed in slot region to suppress circulating currents between strands. The Roebel bar allows increasing machine efficiency, and consequently energy savings. But in end regions of stator windings, the unbalanced leakage fluxes still produce circulating currents. To alleviate the circulating currents in strands, one more transposition can be made in end regions. Such reduced circulating current is achieved at the cost of the consumption of more copper. Therefore, a trade-off between circulating current losses and copper losses must be made. To this end, the transposition method is optimized based on the theoretical analysis of the losses caused by circulating currents.

  • Reactance of square tubular bus bars

    SQUARE tubular bus bars are coming into use to an increasing extent, as they are economical and convenient for joining to insulators and to branch circuits. The reactance of bus-bar circuits is frequently of importance, in order to compute the voltage drop under normal conditions and the current under short-circuit conditions. The purpose of this paper is to present formulas and curves by which the reactance of square tubular bus bars may be determined.

  • Development Process of Vibration Sparking Erosion on Stator Bars

    Vibration sparking can cause serious erosion and deterioration of the stator bar insulation. A circuit model of the semi-conductive layer of a stator bar is proposed to describe the parameters of VS generation and the distribution of the parasitic current along the semi-conductive layer. A simulated VS system was set up to generate VS activity. This paper investigated the development process of and deterioration levels of VS erosion on the bar surface with aging time and the factors influencing VS erosion. The results show that there were three stages in the VS development process with different sparking intensities at each stage. The resistivity of the semi-conductive layer greatly increased after VS erosion. It was found that high energy from VS can result in decomposition of the semi-conductive material and lead to damage of the groundwall insulation.

  • APPRES: Low impedance compliance system for a low frequency bender bar transducer

    A low frequency bender bar transducer performance is evaluated considering two different pressure relief systems, high mechanical impedance squash tubes and low mechanical impedance APPRES.

  • The influence of transposition angle on three-dimensional global domain magnetic field of stator bar in water-cooled turbo-generator

    In this paper, a 600 MW turbo-generator is used as an example. Three- dimensional (3-D) physical model of transposition bars in a single stator slot is established. Field-circuit coupling method is combined in 3-D numerical calculation. The influence of transposition angle on three-dimensional global domain magnetic field of stator bar in water-cooled turbo-generator is researched. The distribution changes of flux density, maximum current and circulating current loss in the corresponding transposition structure are obtained. New solution and theoretical basis will be provided for the structure optimization design of the stator bar.

  • Heat trap detection in the stator bar of large turbogenerators during the fault of cooling water channels blockage

    Cooling water is used to remove the heat from stator bar of large turbogenerators and prevent additional temperature rise. Blockage of these channels leads to heat traps along the stator bar and its temperature failure. In addition, transposition of strands in a bar causes accumulation of heat in some parts of stator bar because of non-uniform arrangement of cooling channels especially when some of channels are blocked. In this paper, effect of cooling water channels blockage is studied using a precise thermal model. It is shown that such heat traps cause additional temperature rise in stator bars and this phenomenon can not be detected by thermal sensors of turbogenerator. Laboratory and onsite experimental data are presented to verify the simulation results. An operation program is proposed to work with generator in faulty cases.

  • The Influence of Transposition Angle on 3-D Global Domain Magnetic Field of Stator Bar in Water-Cooled Turbo-Generator

    Reasonable transposition structure of stator bars in water-cooled turbo- generators could reduce circulating current of strands, and related factors on distribution change of circulating current are complex and diverse. Transposition angle is one of the most important influencing factors, and its influencing degree on circulating current is still unclear. A 600 MW water- cooled turbo-generator is set as an example, a 3-D physical model of transposition bars in a single slot is established, and a field-circuit coupling method is used in 3-D numerical calculation. The optimization of transposition angle is researched, and the distribution changes of 3-D global domain magnetic field, maximum current, and circulating current loss in different transposition angles are obtained. Finally, the calculation results are compared with that of the improved analytical algorithm to validate the accuracy of the solving model.

  • Effects of clamping bars on leakage flux in transformer tanks

    None



Standards related to Bars

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IEEE Standard for Bar Coding for Distribution Transformers and Step-Voltage Regulators

This standard sets forth bar code label requirements for overhead, pad-mounted, and underground-type distribution transformers and step-voltage regulators. Included herein are requirements for data content, symbology, label layout, print quality, and label life expectancy. This standard assumes the existence of central transformer databases within utility companies so that bar code labels need only carry basic transformer identification data.