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NCSX Coil Winding Development Program

NCSX Coil Winding Development Program. Application of Epoxy/Fiberglass Modular Coil Molds -Ventilation/Exhaust Issues. NCSX Cross-section. Modular coils. “VPI” Vacuum-Pressure Impregnation station using autoclave. Two winding stations. VPI Exhaust ventilation. Modular Coil Fabrication.

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NCSX Coil Winding Development Program

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  1. NCSX Coil Winding Development Program Application of Epoxy/Fiberglass Modular Coil Molds -Ventilation/Exhaust Issues

  2. NCSX Cross-section Modular coils

  3. “VPI” Vacuum-Pressure Impregnation station using autoclave Two winding stations VPI Exhaust ventilation Modular Coil Fabrication • The modular coils will be wound in the TFTR Test Cell

  4. Fabrication Steps- part 2 VPI • Waffle Boards and fill ports (sprues) will be added to the modular coil bundle. • Tedlar insulation (non-stick) will then be over-wrapped. • The mold will then be installed around the turns (R&D program will define the VPI methodology) • Mold shall be epoxy/glass fiber sprayed over Tedlar insulation • The shell is non-conductive and could remain around coil • The modular coil will then be vacuum impregnated with the resin system approved by the NCSX Project based upon the R&D program • Once cured, the coil will be electrically tested and transferred to Field Period Assembly station

  5. NCSX Modular Coil Typical Cross-section

  6. Two Phases of Work • Prototyping Development • Components will be “table-top” sized, ~ 4 foot in length. • Six to eight prototypes samples will be encased. • We plan to do the work in a portable tent enclosure set up in the TFTR Test Cell. • Modest amounts of material use. • Modular coil molds. • Much larger enclosure needed. • Each coil has +20 feet of coil. • 19 coils to encase.

  7. Typical Application

  8. Materials- Spray Application • Materials being proposed • Hetron 980/35 Resin System (Low StyreneContent Epoxy Vinyl Ester Resin) • Promoter-Nuodex DMR Cobalt 6% Naphthenate • Co-promoter-N, N-Dimethylaniline • Catalysts- Cadox L-50a • Acetone (for cleaning)

  9. Safety Concerns • Ventilation- good air flow • Personnel protective equipment • Respirators • Eye/face protection • Gloves, coveralls, etc. • Exhaust- via the elephant trunk system • HP concerns • Environmental • Flammability concerns • Mixed waste

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