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Textile, Fiber, and Film Industry Technical Conference, 1997., IEEE 1997 Annual

Date 6-8 May 1997

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Displaying Results 1 - 12 of 12
  • 1997 IEEE Annual Textile, Fiber and Film Industry Technical Conference

    Publication Year: 1997
    Request permission for commercial reuse | PDF file iconPDF (107 KB)
    Freely Available from IEEE
  • Retail competition and Duke Power Company

    Publication Year: 1997
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (548 KB)

    Retail competition means that the customer will be able to choose their electricity supplier, sometime in the future. The author begins with a brief overview of the retail competition pilot that is going on in New Hampshire. After that, the author provides an overview of what's happening across the United States with retail competition. The author discusses his company's position and some of the k... View full abstract»

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  • Installation considerations for IGBT AC drives

    Publication Year: 1997
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1640 KB)

    In the last four years, adjustable speed AC drive (ASD) manufacturers have migrated from bipolar junction transistor (BJT) semiconductors to insulated gate bipolar transistors (IGBTs) as the preferred output switching device. The advantage of IGBTs over BJTs is that device rise and fall time switching capability is 5-10 times faster, resulting in lower device switching loss and a more efficient dr... View full abstract»

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  • An intuitive analysis of harmonic power flow in electrical distribution systems

    Publication Year: 1997
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (540 KB)

    Many have already written much about power quality and harmonics in particular. As nonlinear loads such as lighting ballasts, electronics and variable-speed motor drives become a larger percentage of the total power consumed, the resulting harmonic currents can damage equipment. Furthermore, the local effects of harmonics are most pronounced with higher source impedance from the power source. Unle... View full abstract»

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  • Effects of voltage sags on AC motor drives

    Publication Year: 1997
    Cited by:  Papers (32)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (652 KB)

    Voltage sags are normally described by magnitude variation and duration. In addition to these quantities, sags are also characterized by unbalance (asymmetry), nonsinusoidal waveshapes, and phase angle shift (phase jump). These factors are important for determining the behavior of AC motor drives during sags. Voltage unbalance and phase angle shifts cause large unbalanced source currents to excess... View full abstract»

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  • Power quality: a utility and industry perspective

    Publication Year: 1997
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (924 KB)

    The widespread use of electronics in everything from equipment in the home to the control of huge and costly industrial processes has raised the awareness of power quality, issues and concerns over the last few years. The definition of power quality or more specifically, a power quality disturbance, is generally accepted as any change in the power (voltage, current, or frequency) that interferes w... View full abstract»

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  • The impact of power system disturbances on AC-coil contactors

    Publication Year: 1997
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    This paper is concerned with the impact of voltage sags on the performance of AC-coil contactors in industrial power systems. Sags have been commonly characterized in terms of magnitude and duration. However several experiments are presented which show that sag magnitude and duration are insufficient to characterize contactor performance. The results of these experiments show that contactor drop o... View full abstract»

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  • Communication systems to monitor and control the production environment

    Publication Year: 1997
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    Advances in microprocessor technology made it possible to include intelligence in devices for better control and diagnostics. Using communication networks permits the connection of such devices on a bus system. Such communication systems have to fulfil multiple requirements depending on the application. The use of an open system communication bus and a programmable data structure fulfil the needs ... View full abstract»

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  • The air circuit breaker-50 years of technology

    Publication Year: 1997
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB)

    The low voltage air circuit breaker, the work horse of industrial electrical power systems, is now 50 years old. It has been changed and refined over its history. This paper reviews the development up to the air breaker as it is offered by today's manufacturers View full abstract»

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  • High resistance grounding and fault finding on three phase three wire (delta) power systems

    Publication Year: 1997
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    A debate has existed in the textile industry for years concerning the grounding of low voltage power systems. Since reliability and continuity of service are important in the textile industry, some engineers prefer using an ungrounded power system. Most of these systems now utilize a high resistance grounded source. Here, the author shows that the use of high resistance grounded, low voltage power... View full abstract»

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  • Economic justification of process improvement and automation projects

    Publication Year: 1997
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    Economic justification is the burden of proof for the necessity of process improvement and automation projects. Process improvement and automation projects are undertaken to achieve business objectives. The prospective project's financial return versus the hurdle rate, and its various forms, is the primary information required to make business decisions. This paper describes the steps required to ... View full abstract»

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  • Updating old process control systems to DCS, or moving out of the stone age!

    Publication Year: 1997
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    Updating old/existing control systems to computer based, digital control systems (DCS) is a complex undertaking. It is anything but a “conversion” to computerized controls. More often than not, in fact, guaranteed 100% of the time, the existing process must be adequately “redefined”. Years of process updates, modifications and midnight fixes take their toll on documentation... View full abstract»

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