Proceedings of Electrical/Electronics Insulation Conference

4-7 Oct. 1993

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  • Proceedings of Electrical/Electronics Insulation Conference

    Publication Year: 1993
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    Freely Available from IEEE
  • Author index

    Publication Year: 1993, Page(s): xvi
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    Freely Available from IEEE
  • Transformer design using Windows

    Publication Year: 1993, Page(s):57 - 63
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (276 KB)

    A number of software packages exist to help a programmer make the transition to the Windows environment. The programs are used to develop subprograms of "scripts" that instruct the Windows application to perform certain functions when a button is pushed or a field is entered. Illustrative examples are provided View full abstract»

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  • The effect of electrical ageing on a cast epoxy insulation

    Publication Year: 1993, Page(s):1 - 5
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (652 KB)

    An epoxy composite used as cast electrical insulation in outdoor applications is studied for property and structure changes caused by aging under intensified electric field. The dielectric loss and the dielectric strength of the material are found to be slightly changed over an aging time of 1500 hours. Dynamic mechanical properties of the material show appreciable changes. Scanning electron micro... View full abstract»

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  • PA46 NYLON The driving material for E-motors

    Publication Year: 1993, Page(s):53 - 56
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (424 KB)

    After positioning 46 Nylon among other engineering plastics, specific components in electromotors and the use of 46 Nylon in those parts are discussed. Commercial examples are presented in detail relative to the exceptional properties of 46 Nylon, such as excellent heat resistance, high stiffness and low creep at elevated temperatures, good toughness and fatigue behavior, resistance to chemicals a... View full abstract»

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  • Introduction and overview of statistical process control

    Publication Year: 1993, Page(s):729 - 736
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (628 KB)

    An introduction to an overview of statistical process control is given. Three basic statistical tools are presented in the following order: X bar and R charts; capability; and gage repeatability and reproduceability. After a general introduction and overview of each tool is presented, an application/example of the tool is given. Influencing factors and other general information is included View full abstract»

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  • Coil bobbin and encapsulated coil plastics for the 1990's

    Publication Year: 1993, Page(s):725 - 728
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1412 KB)

    Conductive thermoplastic resins are expected to play a major role in encapsulating transformers rated up to 1 kVA where operating temperature reductions are important. They also will find usage in power supplies and in small motors. The basic properties and performance characteristics of these new resins are reviewed and compared with the 6,6 nylon and thermoplastic polyesters used in most coil bo... View full abstract»

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  • Shielding and magnetic field reduction for small and medium size transformers and reactors

    Publication Year: 1993, Page(s):719 - 724
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (548 KB)

    Data on fields from medium power distribution transformers in the range of 70 to 90 kVA are presented for information. A review of magnetic field practice and related shield effectiveness for small transformers (down to 100 watts) is shown and contrasted to problems with large transformers. Suggestions for formal measurements and review by national test groups are presented View full abstract»

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  • Noise problems of appliance drain pumps

    Publication Year: 1993, Page(s):45 - 52
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (524 KB)

    The drain pump is one of the significant noise sources of washing machine and dishwasher appliances. The pump can generate vibrations, particularly when operated under load. This vibrational energy is converted into radiated sound energy through the large surface of the chassis, kickplate and sidewalls of the cabinet. Structure-borne noise of the pumps is dominant around 100 Hz. The pulsating suct... View full abstract»

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  • Evaluation of a carbonized foam electrode for DC high voltage continuity testing of magnet wire

    Publication Year: 1993, Page(s):147 - 151
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (328 KB)

    A pair of electrically conductive carbonized foam pads can be used as the magnet wire contact electrode for direct current, high voltage continuity testing. The effects of different electrode configurations on DC HVC results of a magnet wire sample from each of the various size ranges are investigated. The variables critical to the carbonized foam electrode performance are under study for presenta... View full abstract»

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  • NEMA magnet wire technical committee

    Publication Year: 1993, Page(s):133 - 136
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (180 KB)

    Information on the activities of the NEMA Magnet Wire Technical Committee since the 1991 E/EIC Conference is provided. The accomplishments of the committee over the last two years are summarized, and data regarding various sub-committees and ad-hoc groups, which have contributed significantly in making the MW 1000 document an updated, established, magnet wire standard are given View full abstract»

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  • Establishing balance tolerances for armatures

    Publication Year: 1993, Page(s):619 - 626
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (520 KB)

    Within the context of a study of balance problems in a motor, the authors discuss the establishment of realistic tolerances, static and dynamic balance, the causes of motor unbalance process control, and effective balancing. Formulae for the maximum unbalance are provided View full abstract»

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  • Transformer design for low cost battery chargers

    Publication Year: 1993, Page(s):713 - 718
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (392 KB)

    Battery chargers for the consumer market must be precise in function and reliable in operation at a reasonable manufacturing cost. A major item within a charger is a transformer. A 60 Hz transformer design methodology which can be used to develop world class devices at modest cost is presented. Specific evaluation techniques include matching application specific bobbins with standard EI and EE lam... View full abstract»

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  • Epoxy bonding of magnets for permanent magnet motors

    Publication Year: 1993, Page(s):275 - 279
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (476 KB)

    A new, widely accepted technology utilizing advanced one-component epoxy for the bonding of permanent magnet motors is presented. Process and equipment improvements combined with rapid curing structural one-component epoxies have made them the adhesive of choice against two-component acrylics and mechanical clips View full abstract»

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  • Nonpolluting solid lubrication of enamelled wires

    Publication Year: 1993, Page(s):165 - 171
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (612 KB)

    A new process for solid lubrication of enameled magnet wires is reported. The authors examine the reasons why magnet wire should have a low coefficient of friction, the possibilities of achieving low friction by processes applied in industry, and which problems appear thereby, especially for solvent-based techniques. The principles of a new process which consists of transferring a solid, meltable,... View full abstract»

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  • Toroidal coil winding machines making the best choice

    Publication Year: 1993, Page(s):243 - 250
    Cited by:  Papers (1)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (700 KB)

    The lack of knowledge regarding the toroidal coil winding equipment hampers the growth of the toroid as first choice for transformers, inductors and other electrical applications. The author discusses the different components of toroidal coil winding machine and their functions; the different types of toroidal coil winding equipment, their application and comparative advantages/disadvantages; and ... View full abstract»

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  • Advantages and applications for two station balancing machines

    Publication Year: 1993, Page(s):613 - 618
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1672 KB)

    Balancing is a critical process in the manufacturing of rotating components such as electrical armatures, motors and blowers. Various balancing products and manufacturing methods designed to meet the increasingly demanding requirements of the manufacturer are discussed. It is shown how a two-station balancing machine can achieve the desired production rates while minimizing capital and operating c... View full abstract»

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  • Computer design of AC and DC inductors

    Publication Year: 1993, Page(s):707 - 712
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (396 KB)

    The design of AC and DC inductors is discussed. There are three types of inductor designs covered, i.e., those with only AC voltage applied; those with a small AC voltage and a large superimposed DC current; and those with significant AC voltage and DC current. While the same fundamental theory applies for all designs, each design approach is considered separately. The design procedure for each ty... View full abstract»

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  • Rebuilding steel core (cap and cone) commutators

    Publication Year: 1993, Page(s):121 - 126
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (484 KB)

    A brief history of the commutator is given. Materials used in the commutator assembly are discussed. Commutator design criteria are reported, together with commutator installation by shops, string banding of the commutator, commutator field problems, and specialty commutators View full abstract»

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  • New designs aid engineering thermoplastics for small motor assemblies

    Publication Year: 1993, Page(s):271 - 274
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (912 KB)

    New materials, assembly techniques, and applications for plastic materials in small, high performance motors of the future are reviewed. Specific topics include encapsulated stator coils, self-insulating stator structures; small fan motors; and conductive resins View full abstract»

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  • Increasing the efficiency of induction motors

    Publication Year: 1993, Page(s):41 - 44
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (272 KB)

    Often, the efficiencies of electrical motors determine the overall costs, i.e., the production and operating costs of a drive. Those costs are defined and discussed with an asynchronous motor as an example. The various possibilities of improving the efficiency of three-phase induction motors are discussed influences on and improvements of the sample motor are given in numerical values. In addition... View full abstract»

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  • Precision ovens for thermal endurance evaluation of electrical insulating material

    Publication Year: 1993, Page(s):635 - 638
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (320 KB)

    It is shown how a commercially available oven can be easily modified by means of an iso-box to arrive at a temperature variation of ± 1 K for thermal endurance evaluations. The modified oven meets all requirements as, for instance, given in IEC 216-4-1 or DIN 50 011, Part 12 with respect to construction and air flow. The temperature fluctuation in particular does not exceed ± 0,5 K a... View full abstract»

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  • Development of laser strippable new heat resistant magnet wire

    Publication Year: 1993, Page(s):185 - 190
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (656 KB)

    The use of a laser apparatus to propose a novel process for stripping enamel coatings from magnet wires without impairing the reliability of the connection is studied. An improved heat-resistant magnet wire, of which the coating can be easily stripped off by using a laser apparatus, is discussed View full abstract»

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  • Motor repair industry response to the energy policy act of 1992: A status report

    Publication Year: 1993, Page(s):105 - 108
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (340 KB)

    The actions taken to date by the Electrical Apparatus Service Association (EASA) to offer guidance to the motor repair industry, information to end-users, and the formation of strategic alliances with governmental agencies and electric utilities are summarized View full abstract»

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  • Automated digital winding test analysis methods

    Publication Year: 1993, Page(s):539 - 543
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (320 KB)

    A multitude of winding tests exists to ensure the quality of electrical windings. New detection methods and digital analysis are very useful in the detection of incipient faults in small and large windings, in motors, generators, coils, and transformers. The following automate digital winding test analysis methods are discussed: amplitude tolerance band; ringing frequency examination; error area r... View full abstract»

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