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IEEE Transactions on Industry Applications

Issue 3 • Date May/Jun 1989

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Displaying Results 1 - 24 of 24
  • Electrostatic means for fabrication of fiber-reinforced metals

    Publication Year: 1989, Page(s):552 - 557
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    An electrostatic means for fabricating fibre-reinforced metals (FRMs) with unidirectionally oriented ceramic fibres to improve mechanical strength is described. Al2O3 short fibres suspended in Freon are electrostatically aligned in the field direction and then sedimented to form a mat, which is dried and casted with aluminium alloy. The mechanism of the electronic orientation... View full abstract»

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  • Reliability testing of electric motors

    Publication Year: 1989, Page(s):386 - 390
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    Several motor failure mechanisms and test methods to determine whether a motor is suitable for extended service are discussed. Application and limitations of these test procedures are described. It is concluded that motor windings fail because the magnetic forces which turn the rotor also cause motion and therefore abrasion in the windings View full abstract»

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  • Conductive fur brush charging of a dielectric surface

    Publication Year: 1989, Page(s):547 - 551
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    A dielectric surface is charged without a corona discharge using a conductive fur brush to which an electrical potential of several hundred volts is applied. The fur brush, which consists of 10-μm-thick conductive fiber, lightly touches the surface of the (Mylar film or photoreceptor) dielectric. It is clear that brush charging is accomplished by direct charge transfer, gas discharge, and tribo... View full abstract»

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  • The gate-turn-off thyristor: a breakthrough for the retrofit of existing induction motors from fixed to adjustable speed

    Publication Year: 1989, Page(s):523 - 532
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1060 KB)

    Gate-turn-off (GTO) technology, application considerations, and new inverter design features are presented, and an example of drive economics is provided. Motor stresses for a retrofitted induction motor such as thermal heating, voltage stress, electrical resonance, and torsional problems are discussed. Drive control, diagnostic capability, and fiber optic gate control are given as examples of dri... View full abstract»

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  • Design and development of new electrostatic voltmeter using strain gauge

    Publication Year: 1989, Page(s):563 - 568
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    This 50 kV class voltmeter accurately detects the displacement of a thin plate of phosphor bronze in the movable electrode, to which the foil gauges are attached, when DC and AC voltages are applied between the fixed and movable electrodes. The movable aluminum-disc electrode and a strain beam are designed, and an electrostatic voltmeter of 50 kV class and higher is manufactured for trial. The rel... View full abstract»

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  • Design of electrostatic fields in a new monocomponent system

    Publication Year: 1989, Page(s):539 - 546
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    A method of designing electrostatic fields for the development of latent electrostatic images as used in a new monocomponent development system is described. This development system uses a development roller with a special structure in which a dielectric layer is formed on a conductive substrate, and a number of small independent electrodes are located on the surface of this dielectric layer. The ... View full abstract»

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  • Closed-transition switching of essential loads

    Publication Year: 1989, Page(s):403 - 407
    Cited by:  Papers (4)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    The design and applications of closed-transition switching to improve performance in transferring all types of essential loads is presented. Application factors are discussed such as load characteristics, the need for periodic testing, anticipation of power failures, desired reliability, and required approvals. Transfer switch design as it applies to both the transfer switch itself and to the asso... View full abstract»

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  • A recommended new standard electrical supply and control configuration for dual-kiln drives

    Publication Year: 1989, Page(s):465 - 474
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    Detrimental electromechanical system interaction that can occur with the standard configuration that connects the armature circuits in series with a single regulated supply and a single tachometer for speed feedback is discussed. Three basic types of disturbance mechanism are studied. An alternative configuration with dual supplies and control systems and which provides highly beneficial electrome... View full abstract»

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  • Torque ripple improvement for brushless DC miniature motors

    Publication Year: 1989, Page(s):441 - 450
    Cited by:  Papers (72)  |  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    An analytical investigation of the brushless DC miniature motor with permanent magnets is presented. Fundamental equations are derived, and the torque ripple is evaluated by utilizing the performance index, which is defined to be in proportion to the peak-to-peak pulsation of the motor velocity. The torque ripple arising from the flux distributions in a magnet is investigated, and the optimal dist... View full abstract»

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  • The safety matrix-a method for guidelining industrial microcomputers

    Publication Year: 1989, Page(s):514 - 522
    Cited by:  Papers (1)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    A matrix guideline, used to compare the safety values of existing control circuit options to those of new options, is outlined. Programmable controllers, instrument distributed control systems, front-end controllers, and microcomputers are compared to electromechanical relays to clarify the microcomputer type controllers' levels of safety responsibility. The matrix can assist those knowledgeable i... View full abstract»

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  • Electrostatic aerial spraying

    Publication Year: 1989, Page(s):558 - 562
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    A method is presented for electrostatic aerial spraying and automatic control of the aircraft potential as well as some preliminary tests carried out with a full-scale aircraft. The method consists of inductively charging two coplanar clouds of opposite polarity and controlling any minor accidental charges on the electrical system by means of corona discharges. By spraying a positively charged pla... View full abstract»

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  • Can field tests prove motor efficiency?

    Publication Year: 1989, Page(s):391 - 396
    Cited by:  Papers (9)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    An outline of the inaccuracies found in the field testing of motors for efficiency is given. A summary of test methods is presented, and the sources of motor loss are discussed. Seven suggestions for improving field-testing accuracy are given View full abstract»

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  • Interfacing the finite-element method with the method of characteristics in self-consistent electrostatic field models

    Publication Year: 1989, Page(s):533 - 538
    Cited by:  Papers (44)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    Two methods are described for interfacing the finite-element method, used to calculate the electric field structure for a known charge distribution, with the method of characteristics, used to calculate the charge distribution for a known electric field structure, so as to obtain self-consistent descriptions of electrostatic systems involving two-way source-field coupling. Both methods circumvent ... View full abstract»

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  • Towards a zero-output impedance UPS system

    Publication Year: 1989, Page(s):408 - 418
    Cited by:  Papers (37)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (732 KB)

    A categorization of loads requiring clean uninterruptible power is provided, a thorough analysis of their effects is given, and presently used partial solutions are examined. The topology of a low-impedance 3-φ high-power inverter stage, designed to alleviate substantially the current difficulties faced by interruptible power supplies (UPSs) when dealing with unbalanced and/or nonlinear loads,... View full abstract»

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  • SO2/NOx control compliance with environmental regulations

    Publication Year: 1989, Page(s):475 - 485
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (856 KB)

    The sources of SO2 and NOx in a Portland cement kiln system are identified. A brief discussion of several known and theoretical control methods for cement-plant SO2 and NO x emissions is presented. The US Portland cement industry is shown to be a minor contributor of SO2 and NOx to atmospheric contamination. The anticipated need and... View full abstract»

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  • The Vitrifix process

    Publication Year: 1989, Page(s):451 - 455
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    The Vitrifix process solves the problems of nonbiodegradability and the legal liability for asbestos in a landfill by totally destroying the asbestos and converting it into a safe, useful product-glass. The process uses well-established glass technology in a unique fashion. The use of an existing technology gives great reliability, and the way it is applied makes the process intrinsically safe. Th... View full abstract»

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  • NFPA 110 and its impact on transfer switching of emergency and standby power

    Publication Year: 1989, Page(s):397 - 402
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (524 KB)

    A review of National Fire Protection Association (NFPA) 110, a standard for emergency and standby power systems, is presented with particular emphasis on transfer switching. NFPA 110 goes beyond the National Electrical Code in stipulating coordinated installation, maintenance and operational and testing requirements. It is shown how this standard is now leading to safer and more reliable emergency... View full abstract»

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  • A variable-voltage current-commutated three-phase inverter

    Publication Year: 1989, Page(s):419 - 426
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    A six-pulse three-phase inverter circuit that provides a wide range of AC output voltages and frequencies is presented. The inverter circuit uses asymmetrical thyristors for all the controllable switches. Through the use of these devices, a small turn-off time, low commutation circuit and switching power losses, and high-surge-current handling capabilities are obtained. The performance of the inve... View full abstract»

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  • Electromagnetic transport and confinement of liquid metals

    Publication Year: 1989, Page(s):495 - 502
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (744 KB)

    Applications in which electromagnetic forces are used to stir, transport, dispense, and/or confine liquid metal are described. Applications include the electromagnetic trough, the electromagnetic mould, pedestal melting, thin strip casting, and levitation casting. Fundamentals relating to the production of electromagnetic forces are reviewed, a number of important applications are discussed, essen... View full abstract»

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  • Improving existing motor protection for medium voltage motors

    Publication Year: 1989, Page(s):456 - 464
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (700 KB)

    Motor failures and associated present-day costs are analyzed, and potential troubles generated within the plant and form the utility distribution system are documented. These troubles, their effects, and resultant motor failure modes are illustrated to determine the maximum protection desired for prolonged motor life. Limitations of older forms of motor protection utilizing induction-type overcurr... View full abstract»

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  • Impact of cycloconverter harmonics

    Publication Year: 1989, Page(s):427 - 435
    Cited by:  Papers (30)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (596 KB)

    Findings from a study on the harmonics generated by a 15 MVA three-phase 13.2 kV 60 Hz to single-phase 24/12 kV 25 Hz static frequency converter (SFC) or cycloconverter are summarized. At light loads, some of the characteristic harmonics (e.g. 10 Hz, 110 Hz) have magnitudes that exceed the fundamental frequency. Since the three-phase components at these frequencies do not necessarily nullify each ... View full abstract»

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  • A miner's personal carbon monoxide alarm

    Publication Year: 1989, Page(s):503 - 508
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (644 KB)

    For the purpose of alerting an underground miner to life-threatening concentrations of carbon monoxide (CO) a miner's personal CO alarm prototype called PEMCOAL has been developed by the Bureau of Mines. The PEMCOAL unit is small enough to be carried on a miner's belt, has a flashlamp visual alarm, requires to calibration for use, and uses a disk sensor which changes color by reaction with CO. PEM... View full abstract»

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  • Waveform optimization design of an AC converter machine

    Publication Year: 1989, Page(s):436 - 440
    Cited by:  Papers (7)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    A square wave machine with 115° rectangular blocks is shown to be theoretically capable of 12.8% more power than a conventionally designed sinusoidal wave machine of the same size. The comparative test results of two 5 kW synchronous machines confirm that the optimized machine can output 8.52% more power than a conventionally designed synchronous machine of the same size and temperature rise. ... View full abstract»

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  • Impact of fiberoptics on grounding of distributed electronics

    Publication Year: 1989, Page(s):509 - 513
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    How fiber optics is being used for proper single-point grounding of distributed electronic systems in industrial facilities with varying existing grounding approaches is outlined. Grounding schemes such as the conventional approach, single-point ground, total single-point ground, and signal reference grid are discussed. A fiber optics solution for a single-point ground system is presented. The aut... 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.

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Meet Our Editors

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