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Proceedings of Electrical/Electronics Insulation Conference

4-7 Oct. 1993

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Displaying Results 1 - 25 of 127
  • 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
  • Consideration about the influence of different process parameters during vacuum casting

    Publication Year: 1993, Page(s):91 - 96
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    When casting electrically highly-loaded components under vacuum, it is of vital importance to consider the major process parameters in regard to the quality of the final product. The connections of these process parameters and their influence are considered. Appropriate devices for casting under vacuum with regard to the criteria mentioned before are presented View full abstract»

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  • Tools for commutator turning

    Publication Year: 1993, Page(s):85 - 89
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    The evolution of both natural and synthetic diamond tooling over the past forty years is discussed. Basic design factors are addressed. Fabrication techniques are reported 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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  • 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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  • Comparison of 9 Mil, 11 Mil and 14 Mil ferro-resonant transformer design

    Publication Year: 1993, Page(s):353 - 357
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    The ferroresonant transformer is used to compare transformers of the same output using 9 Mil, 11 Mil and 14 Mil laminations. The objective is to decide how the improvements in efficiency with the thinner laminations are reflected in performance as measured in temperature rise, stack length and increased watts output View full abstract»

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  • Robotic visual servoing in a flexible manufacturing workcell

    Publication Year: 1993, Page(s):413 - 417
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    The tracking and grasping of an object is carried out. The position of a robot, which has a camera mounted on its end-effector, is controlled using visual feedback. A static "look-and-move" control structure is implemented. The system includes a vision system, robot, and a workstation. The robot tracks an object on a moving conveyor belt, and then grasps the object while the conveyor belt is still... View full abstract»

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  • Techniques and thermoplastics for encapsulating high performance coils

    Publication Year: 1993, Page(s):81 - 83
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    Recent developments in thermoplastic encapsulation materials, molding techniques, and mold design for encapsulating high performance coils are reviewed. Recently developed encapsulation systems for UL 1446 Class F (155 C) and Class H (180 C) applications are discussed View full abstract»

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  • Advantages of corrugated transformer insulation

    Publication Year: 1993, Page(s):525 - 527
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB)

    New transformer materials continue to be developed and tested for various temperature ranges and operating conditions. Several sinusoidal corrugated sizes are now also available, as well as many special combinations to satisfy specific transformer insulation and strength design requirements. Small sizes of square and rectangular NOMEX are available to keep primary and secondary winding closely int... View full abstract»

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  • The effect of interfacial interaction on charge storage in clay filled LDPE

    Publication Year: 1993, Page(s):697 - 701
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    The dielectric properties of low-density polyethylene (LPDE) filled with aluminum silicate clay fillers are studied by thermally stimulated currents and time domain dielectric spectroscopy. The change of the charge storage behavior and related dielectric responses due to the polymer-filler interactions is investigated by analyzing the effect of the particle sizes of the fillers and that of surface... View full abstract»

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  • Multi-pole magnetization of high resolution magnetic encoder

    Publication Year: 1993, Page(s):237 - 242
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    The construction of the magnetic encoder with a magnetoresistance sensor and a multi-pole magnetic drum is described. A rotatory magnetization system has been developed to magnetize the magnetic encoder. It is found that the sine-PWM magnetization is superior over the single-pulse magnetization when high resolution is needed View full abstract»

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  • Metallurgical aspects in high volume copper bonding

    Publication Year: 1993, Page(s):263 - 269
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2724 KB)

    Current motor manufacturing practices involve the rapid and precise winding of insulated copper wire to form the field coil on the armature. Immediately after winding, the copper wires are bonded to the tangs of the commutator. Adequate bonding between the field coil wire and the commutator at the tang is necessary for proper motor operation. Manufacturing costs and product quality are important i... View full abstract»

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  • Verification of insulation temperature class through weight loss measurements

    Publication Year: 1993, Page(s):553 - 556
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    A simple accelerated thermal aging test is applied to verify the temperature index range of replacement insulation systems for rewinding stators of large rotating machines. The measurement of insulation weight loss at elevated temperatures and noting the progression of constituent deterioration provides valuable information for matching the variety of systems available to expected operating condit... 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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  • Commutation turning: The tool is only the tip of the solution

    Publication Year: 1993, Page(s):281 - 285
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    The author considers the commutation manufacturing and machining processes which may have a significant effect on the performance of an electric motor. Specific topics include the lathe, the tool, and setup and machining recommendations View full abstract»

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  • Electric field enhancement studies on stator windings with defect sites using finite-element computation

    Publication Year: 1993, Page(s):345 - 351
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (948 KB)

    Several dissections performed on stator coils and cars following an accelerated voltage endurance test reveal failure initiation sites to be predominant at defect sites within the insulation. The types of defects observed include occlusions, particulate contamination, strand deformity, and the presence of tape folds. Such defects, when present at the corners of the stator coil, seriously affect th... View full abstract»

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  • Thermal effects on the torque-speed performance of a brushless DC motor

    Publication Year: 1993, Page(s):403 - 411
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    The torque-speed performance of a three phase brushless DC motor with a wye open drive is investigated. A thermal lumped parameter model is developed and validated by experiments. Torque-speed limits are then evaluated for various thermal conditions, e.g., free convection, forced convection with heat sink, using the thermal model. The evaluations are for an open frame, twelve-slot, two-magnet pole... View full abstract»

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  • Practical approaches to ISO 9000 for the small-to-midsized company

    Publication Year: 1993, Page(s):115 - 120
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    The authors examine the misconceptions which are circulating about ISO 9000. They attempt to develop a better understanding of the ISO standards, share some experience-based guidance on choosing a path to certification, and develop realistic expectations regarding auditors and the initial and ongoing certification process View full abstract»

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  • A systematic approach to process control in commutator fusing

    Publication Year: 1993, Page(s):585 - 589
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    Fusing has been found to be the most critical process in electrical motor manufacturing. This is particularly true for the new generation of asbestos-free high-speed motors. The authors describe how to evaluate fusing results, the fusing process, the effects of commutator design and construction on the fusing process and improvements to fusing machine technology for improved process control View full abstract»

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  • Improved mica groundwall insulation via grafted polymers

    Publication Year: 1993, Page(s):329 - 332
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    Exploratory work done in an attempt to improve the surface wetting characteristics of mica for high voltage insulation by "grafting" (i.e., chemically reacting) polymer structures to the mica surface is described. Two different experimental approaches to grafting are evaluated, i.e., by chemical reaction; and by plasma polymerization. Both methods give promising results. Evidence for actual polyme... 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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  • Low pressure encapsulation of coils, transformers and electronic assemblies with thermosetting liquid molding compound

    Publication Year: 1993, Page(s):73 - 79
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2040 KB)

    Advanced liquid molding and encapsulating compound (ALMEC) systems, a family of polymeric hybrid resin molding compounds that allows economical manufacture of electrical and electronic assemblies are discussed. It is demonstrated that they can be successfully used to encapsulate coils and other electrical and electronic devices. Due to their liquid nature, they allow automation of the molding oper... View full abstract»

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  • Comparison of mechanical strengths of three materials used as pressure plates in oil-filled transformers

    Publication Year: 1993, Page(s):519 - 523
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (800 KB)

    A comparison of the physical properties of three varieties of material used as pressure rings to clamp and hold the coils of core-form oil filled transformers is given. The data is presented to serve as a guide in the selection of materials for pressure ring applications. The materials studied are polyester bonded high density pressboard, epoxy bonded electrical steel and epoxy bonded filament gla... View full abstract»

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  • Moisture cross-linkable insulation compounds with flame retardant properties

    Publication Year: 1993, Page(s):691 - 696
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1080 KB)

    Ethylene vinyl trimethoxy silane copolymer is shown to be suitable for flame retardant cable applications. A silane copolymer compound with 28% thermal black filler is shown to retain its melt flow rate by 90% when stored for a year at 23°C and 55% relative humidity. Cables of filled silane copolymer insulation are cured at 90°C in water, and at ambient temperature and humidity conditions.... View full abstract»

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