Semiconductor switched capacitive circuit for energy transfer between superconducting magnets

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:45438

Baker, J R; Walters, J D ^[1]

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1. Naval Surface Warfare Center, Annapolis, MD (United States)

A solid-state IGBT switched capacitive circuit capable of transferring energy between two 0.94 henry NbTi superconducting magnets storing 5.0 kJ has been developed. Maximum operating current in the magnets and switching circuit is 100A. Energy transfer between magnets is step-wise requiring the coupling capacitor to store only a small fraction of a magnet`s total stored energy. Energy transfer time is directly proportional to magnet current and inductance, and is inversely proportional to the maximum voltage across the coupling capacitor. Initial energy transfer rate goal is 5.0 kW; equating to a time rate of change in the magnetic field of 1.7 Tesla/sec. Only a small power supply is required to provide the initial charge to one coil, replace dissipated energy due to resistive heating in the semiconductor switches and connecting cables, and A.C. losses in the superconducting magnets. Test results from operating this energy transfer circuit are presented and discussed.

• OSTI ID: 45438
• Report Number(s): CONF-930703--
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ENERGY TRANSFER
SEMICONDUCTOR SWITCHES
SUPERCONDUCTING MAGNETS