Title:
電源装置および変圧器
Document Type and Number:
Japanese Patent JP7028032
Kind Code:
B2
Abstract:
To provide a power supply device and a transformer that are capable of preventing a transformer from being complicated, and increased in size, even when it is so constituted that a protection operation is performed in the case of temperature rise of the transformer.SOLUTION: A power supply device 100 (transformer 1) is arranged between one core 30 and the other core 40, comprises a thermal expansion member 50 including an insulating resin or insulation rubber having a larger thermal expansion coefficient α2 than a thermal expansion coefficient α1 of an annular core 13, and is constituted so that a current value I0 of excitation current i0 is made to be large, when a distance D between the one core 30 and the other core 40 becomes large via thermal expansion of the thermal expansion member 50.SELECTED DRAWING: Figure 2
Inventors:
Koji Maruyama
Application Number:
JP2018071345A
Publication Date:
March 02, 2022
Filing Date:
April 03, 2018
Export Citation:
Assignee:
Fuji Electric Co., Ltd.
International Classes:
H02M3/28; H01F27/00; H01F27/24; H01F30/10
Domestic Patent References:
| JP2002281748A | ||||
| JP2000060132A | ||||
| JP2013132175A | ||||
| JP2014216373A |
Foreign References:
| US20150365005 |
Attorney, Agent or Firm:
Hirokazu Miyazono
Tomohiro Mimori
Tomohiro Mimori
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