Electrophoretically applied dielectrics for amorphous metal foils used in pulsed power saturable reactors

Conference · Sat Dec 31 23:00:00 EST 1988

DOI:https://doi.org/10.1557/PROC-153-229· OSTI ID:6312962

Sharp, D. J.; Harjes, H. C.; Mann, G. A.

Amorphous metal foil-wound inductors have been tested as ferromagnetic saturable inductive elements for pulsed-power (multi-terawatt) switching modules in the inertial confinement fusion program at Sandia National Laboratories. In simulated capacitor testing premature dielectric breakdown of thin polyethylene terephthalate film insulation in the inductor windings occurs at considerably below 2500 V. This appears to be due to inadvertant dielectric damage from micro-spikes on the amorphous foil surface. Electron micrographs and dielectric breakdown data illustrate that electrophoretically-applied dielectric coatings, deposited from organic aqueous colloid dispersions, can be used to provide insulating coatings on the foil which provide a 240% improvement (6000 V) in the breakdown strength of wound amorphous foil inductors. The theory and operation of a dedicated electrophoretic continuous coating system is described. The machine was constructed and successfully applied for dielectric coating of amorphous metal foil. Additional possible applications exist for practical dielectric coating of metallic films or foils used in various commercial wound-type capacitor structures. 7 refs., 9 figs.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6312962
• Report Number(s): SAND-89-0649C; CONF-890426-2; ON: DE89009322
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209* -- Fusion Power Plant Technology-- Component Development & Materials Testing
AMORPHOUS STATE
CAPACITORS
COATINGS
CONFINEMENT
DIELECTRIC MATERIALS
ELECTRICAL EQUIPMENT
ELECTRICAL INSULATION
ELECTRONIC CIRCUITS
EQUIPMENT
FERROMAGNETIC MATERIALS
INERTIAL CONFINEMENT
MAGNETIC MATERIALS
MATERIALS
PLASMA CONFINEMENT
PULSED FUSION REACTORS
SWITCHES
SWITCHING CIRCUITS
TESTING
THERMONUCLEAR REACTORS