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IEEE Transactions on Industry Applications

Issue 5 • Sept.-Oct. 1993

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Displaying Results 1 - 25 of 30
  • Discussion on "Microprocessor-based protection relays: design and applications examples" by D. Baigent and E. Lebenhaft

    Publication Year: 1993
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (123 KB)

    The discusser points out discrepancies in the above-titled paper by D. Baigent and E. Lebenhaft (ibid., vol.29, no.1, pp.66-71, Jan./Feb. 1993). Questions are raised, and comparisons are made regarding microprocessor-based relays and electromechanical relays. Baigent and Lebenhaft reply to the questions raised and comment on the discrepancies.<> View full abstract»

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  • International performance definitions for electric generating units: the IEEE and UNIPEDE working together

    Publication Year: 1993, Page(s):986 - 989
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    Electric utilities all over the world are being challenged to provide safe and dependable electric energy. Sharing data and experiences regarding generating unit performance helps utilities meet that challenge, but common terminology and performance assessment techniques are needed for exchanges to happen. Two international organizations, the IEEE and UNIPEDE, have each developed reference standar... View full abstract»

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  • LowNox pyro-systems design and operation

    Publication Year: 1993, Page(s):867 - 875
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (876 KB)

    Proven equipment designs that are presently available for the reduction of Nox emissions are outlined. Operational results of these modern burning techniques for lower NOx emission and improved operating conditions are presented. The design of today's cement pyro-line is outlined and how attention to detail in a few important areas can reduce NOx emissions by up to... View full abstract»

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  • The designer of industrial and commercial power systems and code interpretations

    Publication Year: 1993, Page(s):979 - 985
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (724 KB)

    From the viewpoint of the electrical engineer and designer of industrial and commercial power systems, the relationship between design practice and the National Electrical Code and the possible consequences of failure to design a system that does not meet requirements of the inspection authority are discussed. The problems of interpretations by the inspection authority or designer that are not in ... View full abstract»

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  • Grate cooler performance optimization at Eiberg Zement

    Publication Year: 1993, Page(s):859 - 866
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (892 KB)

    The grate cooler at Eiberg Zement in Austria provides an example of how older grate coolers can be modernized and upgraded to meet the requirements of todays modern clinker cooling systems. The progressive modifications of the cooler system are described. The installation of the Muldengrate system, a hydraulic drive for the cooler grate and the riddlings drag chain, and the installation of a rolle... View full abstract»

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  • A solid-state high-performance reactive-power compensator

    Publication Year: 1993, Page(s):969 - 978
    Cited by:  Papers (22)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (748 KB)

    A high-performance reactive-power compensator is presented and analyzed. The VAR compensator consists of a three-phase current-regulated pulse width modulated voltage-source inverter connected to a self-controlled DC bus. Reactive-power compensation is achieved by forcing the inverter output current to follow a reactive sinusoidal reference waveform at a constant switching frequency. The main adva... View full abstract»

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  • A strategy for improving reliability of field-oriented controlled induction motor drives

    Publication Year: 1993, Page(s):910 - 918
    Cited by:  Papers (160)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (656 KB)

    Although design of induction motor drives employing field-oriented control has reached a relatively mature state, relatively little effort has been expended on improving the reliability of these drives. A new, improved induction motor drive topology and control strategy are proposed that allow for continuous, disturbance-free operation of the drive even with complete loss of one leg of the inverte... View full abstract»

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  • A radar coal thickness sensor

    Publication Year: 1993, Page(s):834 - 840
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (556 KB)

    A radar coal thickness sensor is being developed by the Bureau of Mines to measure both the dielectric constant and thickness of a coal seam as part of a sensor array supporting a computer-assisted coal mining machine. The noncontacting stepped-CW radar sensor measures the complex reflection of coefficient of the coal-shale interface to resolve the coal thickness to sub-wavelength accuracies. The ... View full abstract»

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  • The effect of corrosion myths on national electrical standards

    Publication Year: 1993, Page(s):1006 - 1011
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (548 KB)

    It is argued that stainless steel does corrode and should not be listed as an acceptable, perhaps preferred, material for ground rods. A review of corrosion basics and a detailed account of how stainless steel does corrode are provided. Examples of other misconceptions on the part of electrical engineers, as well as corrosion engineers, are also discussed. This discussion underlines the need for a... View full abstract»

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  • A high-performance gate/base drive using a current source

    Publication Year: 1993, Page(s):933 - 939
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    The gate drive discussed achieves extremely fast turn-on times due to a current pulse applied to the gate. The gate/base current rise time is only a function of the turn-off time of a MOSFET, resulting in extremely fast rise times. The fundamental limits of the new drive are pointed out, including minimum off-time and maximum on-time. A loss analysis is also carried out. Experimental results verif... View full abstract»

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  • A high-performance edge heater for the hot strip mill

    Publication Year: 1993, Page(s):854 - 858
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    A transverse magnetic flux type of induction edge heater for hot strip mills that can sufficiently heat the edge portion of a transfer bar from the very head end to the very tail end was developed. This was accomplished not only by applying the magnetic flux leakageless C-type edge heater that consists of a single magnetic circuit but also by developing an algorithm for setting the optimum air gap... View full abstract»

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  • Zero-voltage-switching PWM inverter for high-frequency DC-AC power conversion

    Publication Year: 1993, Page(s):959 - 968
    Cited by:  Papers (35)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    A zero-voltage-switching (ZVS) three-phase pulse width modulated (PWM) inverter which uses a parallel-resonant DC-link (PRDCL) circuit proposed by J. He and N. Mohan (1989) is examined. The PRDCL circuit is aimed at both providing zero-DC link voltage periods for PWM inverter switchings and imposing minimum DC bus voltage stress to PWM inverters. A simple circuit control scheme and the design form... View full abstract»

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  • DC overcurrent protection-where we stand

    Publication Year: 1993, Page(s):1029 - 1032
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    Most DC systems require some form of overcurrent and/or short circuit protection. As with any fuse selection, the three elements of system voltage, normal load current, and available short-circuit must be considered. For proper application, the fuse's ratings must equal or exceed the system parameters. Manufacturer's published data are usually based on AC ratings, and the burden often falls on the... View full abstract»

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  • Power electronics and motion control-technology status and recent trends

    Publication Year: 1993, Page(s):902 - 909
    Cited by:  Papers (94)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (924 KB)

    Power electronics and motion control have emerged as very important technologies in the recent trend of industrial automation. This work reviews the technology status and trends in power electronics and motion control with emphasis on AC machine drives. A comprehensive review of power semiconductor devices, power converter circuits, machine drives, and various motion control techniques is included... View full abstract»

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  • Superconducting magnetic energy storage for power system applications

    Publication Year: 1993, Page(s):990 - 996
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (660 KB)

    A survey of the technology of superconducting magnetic energy storage (SMES) is discussed. This technology is attractive for its high efficiency and fast response, but the economic benefits are dubious. Research done in the USA and Japan resulted in several conceptual designs for utility-scale SMES systems. Experiments on power system models proved that SMES systems offer other benefits in additio... View full abstract»

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  • The effect of residence time on the CO2 reduction from combustion flue gases by an AC ferroelectric packed bed reactor

    Publication Year: 1993, Page(s):876 - 881
    Cited by:  Papers (43)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (500 KB)

    An experimental investigation was conducted to reduce CO2 from combustion gases using an AC ferroelectric packed bed reactor. This ferroelectric packed bed reactor consists of two mesh electrodes packed with ferroelectric particles between them. An AC voltage is applied to the reactor to generate partial or spark discharges. The results show the following: the CO2 gas reduct... View full abstract»

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  • Two-degree-of-freedom robust speed controller for high-performance rolling mill drives

    Publication Year: 1993, Page(s):919 - 926
    Cited by:  Papers (51)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    A scheme is presented for the speed control of rolling mill drives. The proposed speed controller is based on a two-degree-of-freedom (TDF) structure and uses an observer-based state feedback compensator for the major control loop. The control method yields a robust system with respect to system uncertainties and modeling errors and is very effective for vibration suppression. Experimental verific... View full abstract»

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  • Why should the steel industry do anything with their PCB transformers?

    Publication Year: 1993, Page(s):841 - 845
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    EPA regulations force owners of PCB (polychlorinated biphenyl) equipment to carefully review regulatory compliance and develop PCB risk management programs. The EPA is currently planning new PCB regulations that may add additional PCB management requirements. The author briefly reviews the EPA regulations, highlighting the more commonly violated requirements. Several risk management techniques are... View full abstract»

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  • Substation reliability simulation model

    Publication Year: 1993, Page(s):1012 - 1017
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (556 KB)

    Utility supply operational characteristics are used to reveal the possible significant differences between theoretical and actual reliability indices when component failures and restoration activities are not independent. A customized simulation model is described for assessing the reliability indices of an industrial substation configuration as a function of calendar time based on the historical ... View full abstract»

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  • A synchronized resonant DC link converter for soft-switched PWM

    Publication Year: 1993, Page(s):940 - 948
    Cited by:  Papers (37)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (692 KB)

    A resonant DC link scheme for soft-switched inverters, where the link oscillation can be synchronized with inverter modulation, is proposed. The scheme is able to operate with reduced commutation losses at a high switching frequency. Synchronization capability allows development of suitable modulation techniques that ensure improved waveform accuracy. The system performance and control strategies ... View full abstract»

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  • An overview of water-resistant cable designs

    Publication Year: 1993, Page(s):831 - 833
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    An overview of the most current information on several different constructions and materials that help combat water treeing is presented. After a brief description of the treeing phenomenon, the author covers accelerated cable life testing, noting the various compounds normally used as the insulation for the medium voltage cable: crosslinked polyethylene (XLPE), tree retardant crosslinked polyethy... View full abstract»

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  • Effect of DC ripple and commutation on the line harmonics of current-controlled AC/DC converters

    Publication Year: 1993, Page(s):997 - 1005
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    Line harmonics are usually predetermined under the simplified assumption that the DC current is sufficiently smoothed. But in practical operation of controlled converters, e.g., feeding medium-sized DC drives, DC ripple often cannot be neglected. For the predetermination of line harmonics, this means that the operating point is specified by the EMF and the mean value of the DC current, i.e., the a... View full abstract»

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  • Pulsed corona discharge for hydrogen sulfide decomposition

    Publication Year: 1993, Page(s):882 - 886
    Cited by:  Papers (31)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    The results of the use of a wire-in-tube corona reactor, energized by short voltage spikes, to decompose small concentrations of hydrogen sulfide contained in hydrogen are presented. Parameters investigated include the reactor geometry, hydrogen sulfide concentration, corona power, and the nature of the product. Electronic-molecular interactions are considered, and a mathematical model is formulat... View full abstract»

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  • Split-phase induction motor operation from PWM voltage source inverter

    Publication Year: 1993, Page(s):927 - 932
    Cited by:  Papers (111)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    The operation of split-phase induction motors from pulse-width modulated (PWM) voltage source inverters is examined. Splitting the phase windings leads to reduced voltage ratings for the inverter switches. As compared with seven positions for the space phasor of voltage in three-phase machines, 48 different locations bounded by a 12-sided polygon are possible in the split-phase machine. Based on s... View full abstract»

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  • A comparison of industrial communications networks

    Publication Year: 1993, Page(s):846 - 853
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB)

    The fundamental characteristics of industrial local area networks are introduced, and how these characteristics effect each application is reviewed. The author identifies which type of network is best suited for different control applications View full abstract»

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Aims & Scope

The scope of the IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS includes all scope items of the IEEE Industry Applications Society, that is, the advancement of the theory and practice of electrical and electronic engineering in the development, design, manufacture, and application of electrical systems, apparatus, devices, and controls to the processes and equipment of industry and commerce; the promotion of safe, reliable, and economic installations; industry leadership in energy conservation and environmental, health, and safety issues; the creation of voluntary engineering standards and recommended practices; and the professional development of its membership.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Thomas A. Nondahl
t.nondahl@ieee.org