STATIONARY INDUCTION ELECTRIC APPARATUS

• Main Authors: ONO YASUNORI, MATSUO TAKAHIDE, OGATA HIDEKI, MIYAMOTO NAOYA, KAWAMURA KENICHI
• Format: Patent
• Language: English; Japanese
• Published: 09.11.2015
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; INDUCTANCES; MAGNETS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS

PROBLEM TO BE SOLVED: To reduce the loss of an iron core tightening metal fitting and a tank caused due to a leakage magnetic flux from a coil at between iron core tightening metal fitting ends.SOLUTION: A stationary induction electric apparatus includes: an iron core having an iron core leg and an iron core yoke 1B; coils 2a-2c, 3a-3c wound around the iron core leg; and an iron core tightening metal fitting 4 disposed above and below the coils 2a-2c, 3a-3c and tightening an iron core 1. A magnetic shield 6 formed of a material with high permeability is arranged between an iron core tightening metal fitting end and the coils 2a-2c, 3a-3c on a high voltage side and a low voltage side. The magnetic shield 6 is held by an attachment member 9 held at an end of the iron core tightening metal fitting 4 in an axial direction. 【課題】鉄心締付け金具端部間における巻線からの漏れ磁束に起因する、鉄心締付け金具およびタンクの損失を低減する。【解決手段】鉄心脚及び鉄心継鉄１Ｂを有する鉄心と、鉄心脚に巻回された巻線２ａ〜２ｃ、３ａ〜３ｃと、巻線２ａ〜２ｃ、３ａ〜３ｃの上下に配置されて鉄心１を締付け固定する鉄心締付け金具４とを備えた静止誘導電器において、鉄心締付け金具端部と高圧側及び低圧側の巻線２ａ〜２ｃ、３ａ〜３ｃの間に高透磁率の材料で形成した磁気シールド６を配置する。磁気シールド６は、鉄心締付け金具４の軸方向端部に挟持された取付け部材９により保持される。【選択図】図１