US 9,812,250 B2
Transformer
Yasunori Ono, Tokyo (JP); Takahide Matsuo, Tokyo (JP); Naoya Miyamoto, Tokyo (JP); Taku Oyama, Tokyo (JP); Kentaro Koseki, Tokyo (JP); and Ryoji Hirobe, Tokyo (JP)
Assigned to Hitachi, Ltd., Tokyo (JP)
Filed by Hitachi, Ltd., Chiyoda-ku, Tokyo (JP)
Filed on Jun. 15, 2015, as Appl. No. 14/738,993.
Claims priority of application No. 2014-190672 (JP), filed on Sep. 19, 2014.
Prior Publication US 2016/0086726 A1, Mar. 24, 2016
Int. Cl. H01F 27/02 (2006.01); H01F 27/08 (2006.01); H01F 27/10 (2006.01); H01F 27/36 (2006.01); H01F 27/34 (2006.01)
CPC H01F 27/365 (2013.01) [H01F 27/02 (2013.01); H01F 2027/348 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A transformer comprising:
an iron core having an iron core leg and an iron core yoke;
windings wound around the iron core leg;
a tank having the iron core and the windings therein; and
magnetic shields formed by laminating silicon steel sheets inside the tank,
wherein the magnetic shields are configured using, at least, a first magnetic shield and second magnetic shields;
the first magnetic shield is arranged opposite to the windings;
the second magnetic shields are arranged between the first magnetic shield and the tank; and
the first magnetic shield and the second magnetic shields are fixed to the tank by different support members, and
wherein lower ends of the second magnetic shields are arranged at second magnetic shield lower support bases fixed to the tank and are supported by second magnetic shield lower covers fixed to the second magnetic shield lower support bases, and
wherein the second magnetic shields are fixed while sandwiched between second magnetic shield fixing bases fixed to the tank and second magnetic shield covers above the second magnetic shield lower support bases and the second magnetic shield lower covers.