IP Library › Granted Patent US 12,712,120
Granted Patent B2
US 12,712,120 · App. 17/986,487 · Granted Aug 18, 2026

Transformer

Inventors: Ryousuke Mikoshiba (Tokyo, JP); Masaya Tanaka (Tokyo, JP); Makoto Shinohara (Tokyo, JP)
Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
H01F27/306
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Quick Facts
Patent No.
US 12,712,120
App. No.
17/986,487
Granted
Aug 18, 2026
Kind
B2
Abstract

There is provided a transformer ( 101 ) in which deformation of a coil ( 403, 503, 603 ) caused by a short-circuit electromagnetic mechanical force can be suppressed by using a coil pressing metal fitting ( 303, 401, 501, 601 ) that saves space and that is lightweight. A coil pressing metal fitting ( 303, 401, 501, 601 ) includes a coil pressing metal fitting base member ( 201, 301 ) that comes into contact with a coil ( 403, 503, 603 ), and a reinforcement member ( 302 ) disposed outside the coil pressing metal fitting base member ( 201, 301 ). The reinforcement member ( 302 ) is connected and fixed to the coil pressing metal fitting base member ( 201, 301 ) by a joining member from inside the coil pressing metal fitting base member ( 201, 301 ) through the hole ( 202, 204 ) of the coil pressing metal fitting base member ( 201, 301 ).

Claims (26)

1 . A transformer ( 101 ) comprising:

a coil pressing metal fitting ( 303 , 401 , 501 , 601 ) that presses against a coil ( 403 , 503 , 603 ) from an outside, the coil ( 403 , 503 , 603 ) being wound around an iron core leg ( 402 , 502 , 602 ) made of an amorphous ribbon,

wherein the coil pressing metal fitting ( 303 , 401 , 501 , 601 ) includes a coil pressing metal fitting base member ( 201 , 301 ) that comes into contact with the coil ( 403 , 503 , 603 ), and a reinforcement member ( 302 ) disposed outside the coil pressing metal fitting base member ( 201 , 301 ),

the coil pressing metal fitting base member ( 201 , 301 ) has a hole ( 202 , 204 ) at a predetermined location,

the reinforcement member ( 302 ) is connected and fixed to the coil pressing metal fitting base member ( 201 , 301 ) by a joining member from inside the coil pressing metal fitting base member ( 201 , 301 ) through the hole ( 202 , 204 ) of the coil pressing metal fitting base member ( 201 , 301 ),

wherein the coil pressing metal fitting base member ( 201 , 301 ) includes stepped portions ( 304 ) provided at a top and a bottom of the coil pressing metal fitting base member ( 201 , 301 ), and a flat portion ( 305 ) provided between the stepped portions ( 304 ) at the top and the bottom,

the hole ( 202 , 204 ) of the coil pressing metal fitting base member ( 201 , 301 ) includes positioning holes ( 204 ) provided in the stepped portions ( 304 ) and a connection hole ( 202 ) provided in the flat portion ( 305 ),

the reinforcement member ( 302 ) includes engaging portions ( 306 ) provided at a top and a bottom of the reinforcement member ( 302 ), and

in a state where the engaging portions ( 306 ) of the reinforcement member ( 302 ) are inserted and positioned in the respective stepped portions ( 304 ) of the coil pressing metal fitting base member ( 201 , 301 ) through the positioning holes ( 204 ), the connection hole ( 202 ) of the coil pressing metal fitting base member ( 201 , 301 ) is connected by a connecting member from inside the coil pressing metal fitting base member ( 201 , 301 ).

2 . The transformer ( 101 ) according to claim 1 ,

wherein the reinforcement member ( 302 ) has a U-shape.

3 . The transformer ( 101 ) according to claim 1 ,

wherein two or more reinforcement members ( 302 ) are each connected by the joining member from inside the coil pressing metal fitting base member ( 201 , 301 ) through the hole ( 202 , 204 ) of the coil pressing metal fitting base member ( 201 , 301 ), so that the two or more reinforcement members ( 302 ) are disposed side by side and fixed to the coil pressing metal fitting base member ( 201 , 301 ).

4 . The transformer ( 101 ) according to claim 3 ,

wherein among the two or more reinforcement members ( 302 ), the reinforcement members ( 302 ) adjacent to each other are connected to each other by a welding material.

5 . The transformer ( 101 ) according to claim 1 ,

wherein the reinforcement member ( 302 ) includes an uneven portion ( 507 ) on a surface of the reinforcement member ( 302 ).

6 . The transformer ( 101 ) according to claim 1 ,

wherein the reinforcement member ( 302 ) includes a plurality of cutout portions ( 607 ) in a surface of the reinforcement member ( 302 ).

7 . A transformer ( 101 ) comprising:

a coil pressing metal fitting ( 303 , 401 , 501 , 601 ) that presses against a coil ( 403 , 503 , 603 ) from an outside, the coil ( 403 , 503 , 603 ) being wound around an iron core leg ( 402 , 502 , 602 ) made of an amorphous ribbon,

wherein the coil pressing metal fitting ( 303 , 401 , 501 , 601 ) includes a coil pressing metal fitting base member ( 201 , 301 ) that comes into contact with the coil ( 403 , 503 , 603 ), and a reinforcement member ( 302 ) disposed outside the coil pressing metal fitting base member ( 201 , 301 ),

the coil pressing metal fitting base member ( 201 , 301 ) has a hole ( 202 , 204 ) at a predetermined location,

the reinforcement member ( 302 ) is connected and fixed to the coil pressing metal fitting base member ( 201 , 301 ) by a joining member from inside the coil pressing metal fitting base member ( 201 , 301 ) through the hole ( 202 , 204 ) of the coil pressing metal fitting base member ( 201 , 301 ), and

wherein the coil pressing metal fitting base member ( 201 , 301 ) further includes a connection cutout portion ( 203 ), and

the reinforcement member ( 302 ) is fixed to the coil pressing metal fitting base member ( 201 , 301 ) through the connection cutout portion ( 203 ).