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IEEE Transactions on Industry Applications

Issue 6 • Date Nov.-Dec. 1990

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Displaying Results 1 - 25 of 31
  • Discussion, with reply, of "A split-wound induction motor design to improve the reliability of PWM inverter drives" by J.C. Salmon and B.W. Williams

    Publication Year: 1990
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (109 KB)

    With regard to the above-titled paper by J.C. Salmon and B.W. Williams (see ibid., vol.26, no.1, pt.1, p.143-50, 1990), the discusser points out that inverter drives featuring split-wound motors were marketed in 1971 by William Lear Enterprises, Inc. In reply, Salmon takes this opportunity to clarify some features of the inverter drive presented in his original paper. These features result in perf... View full abstract»

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  • Two new designs of `field mill' type fieldmeters not requiring earthing of rotating chopper

    Publication Year: 1990, Page(s):1178 - 1181
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    Two novel designs of field-mill-type fieldmeters that have been devised and developed to avoid the problems which arise with the earthing of rotating choppers of traditional field mill instruments are described. The first design uses a second fieldmeter section to measure and compensate for the voltage on the rotor of the primary section; the second uses a constant-capacitance rotor arrangement wi... View full abstract»

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  • Analytical modeling of device-circuit interactions for the power insulated gate bipolar transistor (IGBT)

    Publication Year: 1990, Page(s):995 - 1005
    Cited by:  Papers (56)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    The device-circuit interactions of the power insulated gate bipolar transistor (IGBT) for a series resistor-inductor load, both with and without a snubber, are simulated. An analytical model for the transient operation of the IGBT, previously developed, is used in conjunction with the load circuit state equations for the simulations. The simulated results are compared with experimental results for... View full abstract»

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  • Analysis of winding stockroll potential

    Publication Year: 1990, Page(s):1173 - 1177
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    When a dielectric web is wound into a stockroll, the electrical potential of the stockroll can build to a very high value if the web carries a net electrical charge, such as from electrification by conveyance rollers. If the web has a somewhat conductive layer the stockroll potential will reach a limiting value due to conduction away from the stockroll. If the web has finite resistivity, a current... View full abstract»

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  • Snubberless high-power rectifiers

    Publication Year: 1990, Page(s):991 - 994
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    Usually, a snubber circuit is put in parallel with a power diode to avoid the occurrence of destructive overvoltages during turn-off. Power rectifiers that do not need a snubber are described. Using numerical simulations from the computer program COMPASS (computer program for the analysis of semiconductors), it is shown that such snubberless rectifiers can be made by controlling the axial carrier ... View full abstract»

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  • Finite-element models for cage induction motor analysis

    Publication Year: 1990, Page(s):1007 - 1017
    Cited by:  Papers (52)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (692 KB)

    Two methods for predicting the performance of cage induction motors using finite elements are described. The first, which is suitable for steady-state analysis, uses a phase-band model for the stator together with a single slot model for the rotor. These are used in an iterative procedure to determine the components of the familiar per-phase equivalent circuit. The second method, which is suitable... View full abstract»

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  • Electrostatic manipulation of DNA in microfabricated structures

    Publication Year: 1990, Page(s):1165 - 1172
    Cited by:  Papers (61)  |  Patents (79)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (724 KB)

    Experimental observation of the electrostatic orientation and dielectrophoresis of DNA under a high-intensity field produced in a microfabricated electrode system is made, using the fluorescent method as a visualization technique. It is shown that the orientation takes place under a field strength of 106 V/m and the frequency at around 1 MHz. The stretch and shrink of an individual mole... View full abstract»

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  • Dynamic performance prediction of polyphase hysteresis motors

    Publication Year: 1990, Page(s):1026 - 1033
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (500 KB)

    The dynamic performance characteristics of polyphase hysteresis motors are presented. A mathematical model to predict the starting and synchronization process of such motors under various operating conditions is given. The model offers a tool for studying the dynamic stability of the hysteresis motor for small-scale disturbances such as changes in load torque, supply voltage, and frequency. A para... View full abstract»

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  • A new approach to harmonic compensation in power systems-a combined system of shunt passive and series active filters

    Publication Year: 1990, Page(s):983 - 990
    Cited by:  Papers (402)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    A novel approach to compensating for harmonics in power systems is presented. It is a combined system of a shunt passive filter and a small rated series active filter. The compensation principle is described, and some filtering characteristics are discussed in detail. Excellent practicability and validity to compensate for harmonics in power systems are demonstrated experimentally. Although the so... View full abstract»

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  • Power system phase rotation and polarized protective relays

    Publication Year: 1990, Page(s):1075 - 1080
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    Many common protective relays used in protection of power equipment are sensitive to phase sequence rotation of the utility supply. A method of analyzing the relay response to the respective phase rotation and other possible variables is described. It is demonstrated that phase rotation usually does not affect zero-sequence polarized relays. The technique is an exercise in voltage and current phas... View full abstract»

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  • A model to predict current distributions in bundled cables for electric glass melters

    Publication Year: 1990, Page(s):1043 - 1048
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    A model for predicting the current distribution in high-current cables that are constructed from bundles of parallel conductors (strands) is presented. These cables are typically used in electric glass melters to interconnect the power transformers and the melter secondary bus installations. Due to the phenomenon known as the skin effect, the magnetic field forces inside the bundled cable will ten... View full abstract»

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  • A roll eccentricity sensor for steel-strip rolling mills

    Publication Year: 1990, Page(s):1063 - 1069
    Cited by:  Papers (9)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    The problem of roll eccentricity compensation in steel-strip rolling mills is examined. A novel roll eccentricity sensor is proposed for the task of retrieving the desired reference signal from the available roll-force measurement. The sensor implements a modified comb filter structure which can be arranged in either tunable or adaptive form. Simulation results based on typical experimental data i... View full abstract»

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  • Force transducer using amorphous Metglas ribbon

    Publication Year: 1990, Page(s):1158 - 1164
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB)

    The characteristics of a new type of high-quality strain gauge using amorphous Metglas SC ribbon are presented. Metglas 2605SC (SC) is an important member of the family of iron-based Metglas alloys. The material is made by cooling the molten alloy at a rate of 106°C/s. It is a general-purpose soft magnetic material. A force transducer has been built using amorphous Metglas SC ribbon... View full abstract»

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  • Derating of induction motors due to waveform distortion

    Publication Year: 1990, Page(s):1102 - 1107
    Cited by:  Papers (39)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    The detrimental effects of nonsinusoidal voltage on induction motor performance are described. The derating of induction motors due to harmonic distortion is discussed in detail. Derating of NEMA Design B induction motors of different output ratings and for two types of enclosures (drip-proof and totally enclosed) due to different cases of harmonic distortions are discussed. IEEE Standard 519 sugg... View full abstract»

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  • Advantages of microprocessors versus discrete digital electronics in appliance controls

    Publication Year: 1990, Page(s):1131 - 1138
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (668 KB)

    The use of 4, 8, and 16 bit microprocessors versus discrete digital electronics in appliance controls is discussed. The categories set forth are not intended to describe all microprocessor parts available, but rather to address general microprocessor technologies. Simple controllers that can compete in applications typically relegated to switches and mechanical timers are discussed, as well as mor... View full abstract»

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  • Instrumentation and standards for testing static control materials

    Publication Year: 1990, Page(s):1182 - 1187
    Cited by:  Papers (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (500 KB)

    The design and performance of instrumentation for quantitative measurement of static charge dissipation, with time scales down to a few tens of milliseconds, are discussed, along with the use of such measurements for assessing materials and practical surfaces. The present approach provides the basis for measurements which both cover the range of values of practical interest and do this in a way wh... View full abstract»

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  • Reliability improvement and economic benefits of online monitoring systems for large induction machines

    Publication Year: 1990, Page(s):1018 - 1025
    Cited by:  Papers (48)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (692 KB)

    Microprocessor-based monitoring systems are being developed for the regular analysis of large induction machine variables and to predict possible fault conditions, so that preventive maintenance can be organized in a cost-effective manner. A method for the evaluation of the improvement of machine reliability made by such monitoring systems is presented. An economic and financial analysis to examin... View full abstract»

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  • Testing and selecting surge suppressors for low-voltage AC circuits

    Publication Year: 1990, Page(s):976 - 982
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (568 KB)

    A brief introduction of the characteristics of surge-protective devices utilized in the study of commercial low-voltage surge suppressors is presented. While doing a survey on more than ten surge suppressors from a number of manufacturers, a testing procedure was set up to evaluate the performance of these products. Since the configuration of surge suppressors may range from a single component to ... View full abstract»

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  • A manual/automatic synchronization circuit for a 37.5 MVA steam-turbine-driven generator

    Publication Year: 1990, Page(s):1081 - 1085
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    The critical parameters in synchronizing a synchronous generator to an electrical system are delta phase angle, delta frequency, and delta voltage magnitude. A manual/automatic synchronization circuit has been designed for a 37.5 MVA generator with protection for all three critical synchronizing parameters. The manual/automatic synchronizing circuit uses triple redundant protective levels for both... View full abstract»

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  • Flying shear control system

    Publication Year: 1990, Page(s):1049 - 1056
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (656 KB)

    The flying shear is used for cutting metal strips that come from the rolling mill at full speed in various custom-length sections. A novel concept of a flying shear control system based on optimal position control with a moving target is presented. The position control is optimal in the sense that the flying shear drive accelerates/decelerates with the driving torque as small as possible. The posi... View full abstract»

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  • Design, commissioning, and operational experience of heat tracing system with extensive electronics monitoring

    Publication Year: 1990, Page(s):1070 - 1074
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    One of the most extensive heat tracing monitoring systems ever installed is examined. Over 400 circuits in a crude oil separation facility are independently and individually monitored. The results of the initial construction commissioning and the first six months of operation are reported. Analysis of cost-effectiveness and engineering lessons learned about electrical heat tracing systems operatio... View full abstract»

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  • Simulation of protective relay performance under short-circuit and transient swing conditions

    Publication Year: 1990, Page(s):1108 - 1115
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    Most methods of relay coordination are based on fixed values of fault current for setting protective relays, regardless of the fact that fault currents are time-dependent. The results of alternative transient calculation procedures are presented. These take into consideration the decay of current with time and can therefore be used to identify the sensitivity of the coordination setting and potent... View full abstract»

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  • SiC thin-film thermistors

    Publication Year: 1990, Page(s):1139 - 1143
    Cited by:  Papers (3)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    A thermistor using an RF-sputtered SiC film has been developed as a temperature sensor for cooking products. Since the SiC film has the advantage of being able to detect temperatures over the wide range of 0-500°C with a good thermal stability, the thermistor can be applied not only to a conventional oven but also to a pyrolytic self-cleaning oven. Since the thermistor can detect surface tempe... View full abstract»

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  • Harmonics-causes, effects, measurements, and analysis: an update

    Publication Year: 1990, Page(s):1034 - 1042
    Cited by:  Papers (116)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    Rectification generates harmonic voltages and currents that can cause problems, e.g. insulation failures due to overheating and overvoltages, malfunction of solid-state equipment, communication interference, etc. The common addition of power factor correction capacitors to such a system generally increases the likelihood of such problems occurring. Online data acquisition and analysis of the harmo... View full abstract»

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  • A case study of replacing steam turbines with LCI-type variable-speed drives

    Publication Year: 1990, Page(s):1086 - 1094
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (904 KB)

    The problems and experiences associated with the installation, start-up, and operation of 7000 HP 1800 r/min and 3600 HP 6000 r/min synchronous motors using load commutated inverter (LCI) variable-speed controllers are examined. The application of new technology in existing process units can present some unusual and sometimes perplexing challenges. The steep learning curve, and the fact that most ... 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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Editor-in-Chief
Thomas A. Nondahl
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