Evaluation of conductor stresses in a pulsed high-current toroidal transformer

Conference · Thu Jan 01 04:00:00 EST 2009

DOI:https://doi.org/10.1109/PPC.2009.5386287· OSTI ID:992224

Turchi, Peter J ^[1]; Rousculp, Chritopher L ^[1]; Reass, William A ^[1]; Oro, David M ^[1]; Merrill, Frank E ^[1]; Greigo, Jeffery R ^[1]; Reinovsky, Robert E ^[1]

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1. Los Alamos National Laboratory

The Precision, High-Energy Density, Liner Implosion Experiment (PHELIX) pulsed power driver is currently under development at Los Alamos National Laboratory. When operational PHELIX will provide 5-10 MAmps of peak current with pulse rise-time of {approx} 5-10 ms. Crucial to the performance of PHELIX is a multi-turn primary, single-turn secondary, current step-up toroidal transformer, R{sub major} {approx} 30 cm, R{sub minor} {approx} 10 cm. The transformer lifetime should exceed 100 shots. Therefore it is essential that the design be robust enough to survive the magnetic stresses produced by high currents. In order to evaluate their design, two methods have been utilized. First, an analytical evaluation has been performed. By identifying the magnetic forces as J{sub 1}{sup 2}/2 {del}L{sub 1} + J{sub 1}J{sub 2}{del}M{sub 12}, where J{sub 1} and J{sub 2} are currents in two circuits, coupled by mutual inductance M{sub 12} and L{sub 1} is the self-inductance of the circuit carrying current J{sub 1}, analytical estimates of stress can be obtained. These results are then compared to a computational MHD model of the same system and to a full finite-element, electromagnetic simulation.

• Research Organization: Los Alamos National Laboratory (LANL)
• Sponsoring Organization: DOE
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 992224
• Report Number(s): LA-UR-09-05660; LA-UR-09-5660
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
ACCURACY
DESIGN
EVALUATION
IMPLOSIONS
INDUCTANCE
LANL
LIFETIME
LINERS
PERFORMANCE
PULSE RISE TIME
SIMULATION
STRESSES
TRANSFORMERS