MAGNETIC SHIELD STRUCTURE FOR AC POWER CABLE

MAGNETIC SHIELD STRUCTURE FOR AC POWER CABLE

PROBLEM TO BE SOLVED: To provide a magnetic shield structure shielding a magnetic field generated from an AC cable wherein a distance d between the cable centers of respective phases is not shorter than 50 mm. SOLUTION: Cables of all phases are surrounded in a plane perpendicular to the current dire...

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Bibliographische Detailangaben
Hauptverfasser: FUJIKURA MASAHIRO, SAKO TAKESHI, TANAKA HIDEYUKI, KUBOTA TAKESHI, YABUMOTO MASAO, SHINO KENJIRO
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRIC ELEMENTS
CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
INDUCTANCES
MAGNETS
MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
PRINTED CIRCUITS
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To provide a magnetic shield structure shielding a magnetic field generated from an AC cable wherein a distance d between the cable centers of respective phases is not shorter than 50 mm. SOLUTION: Cables of all phases are surrounded in a plane perpendicular to the current direction by a soft magnetic body having a thickness of 0.2 mm or more over 180° or more about the center of gravity of the cable in that plane. Excellent magnetic shield effect is attained by setting the closest distance L from the cable center to the surface of the magnetic body within following range; 0.5×d