THREE-PHASE THREE-LEGGED WOUND CORE AND METHOD FOR PRODUCTION THEREOF

Abstract: a three-phase three-legged wound core is disclosed. the three-phase three-legged wound core includes two adjacent inner cores and one outer core enclosing the two inner cores, the inner cores and the outer core including a grain-oriented electrical steel sheet. in the three-phase three-legged wound core, the two inner cores and the one outer core each have a flat section, a corner section adjacent to the flat section, a lap zone in the flat section, and a bent portion in the corner section; the corner sections of the two inner cores and of the one outer core are each provided with two bent portions, the angle formed by the two bent portions being 30� or more; and the grain-oriented electrical steel sheet has a magnetic flux density b8 of 1.84 t or more and 1.92 t or less at a magnetic field strength h of 800 a/m.

Inventor(s): Hirotaka INOUE, Takeshi OMURA, Kenki SHIMIZU

CPC Classification: H01F27/24 (MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES (ceramics based on ferrites ; alloys {; construction of loading coils }; loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers ; thermomagnetic devices ))

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