ACTIVE SHIELD SUPERCONDUCTING ELECTROMAGNET APPARATUS AND MAGNETIC RESONANCE IMAGING SYSTEM

The active shield superconducting electromagnet apparatus includes: a main switching circuit in which first and second main coils, first and second shield coils, and a first superconducting persistent current switch are connected in series; a sub switching circuit in which a bypass circuit, in which...

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Bibliographic Details
Main Authors HIGUCHI YOSHIYA, HONDA TAKURO, ABE MITSUSHI, YAMAMOTO TSUTOMU, ANDO RYUYA
Format Patent
LanguageEnglish
Published 12.02.2009
Subjects
BASIC ELECTRIC ELEMENTS
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
GENERATION
INDUCTANCES
MAGNETS
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TESTING
TRANSFORMERS
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Summary:The active shield superconducting electromagnet apparatus includes: a main switching circuit in which first and second main coils, first and second shield coils, and a first superconducting persistent current switch are connected in series; a sub switching circuit in which a bypass circuit, in which a superconducting fault current limiter and a second superconducting persistent current switch are connected in series, are connected to a series circuit of the first main coil and the second main coil in parallel; a first closed circuit in which at least one of the first main coil and the first shield coil, and a first quench protection circuit are connected in series; and a second closed circuit in which one of the second main coil and the second shield coil, and a second quench protection circuit are connected in series.
Bibliography:Application Number: US20080186618