The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 06, 2022
Filed:
Sep. 29, 2020
Hitachi Metals, Ltd., Tokyo, JP;
Shin Nakajima, Tokyo, JP;
Hajime Itagaki, Tokyo, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
A transformer includes an iron core formed by using an Fe-based amorphous alloy ribbon and a winding wound around the iron core. The ribbon includes dotted line laser radiation traces arranged on at least a first surface in a casting direction. Each of the dotted line laser radiation traces is formed by arranging laser radiation marks on the first surface along a width direction. A spot space is from 0.10 mm to 0.50 mm. In a case in which a line space is d1 (mm), and the spot space is d2 (mm), a number density D of the laser radiation marks (D=(1/d1)×(1/d2)) is from 0.05 marks/mmto 0.50 marks/mm. An iron loss of the ribbon in a single sheet is 0.150 W/kg or less at a frequency of 60 Hz and a magnetic flux density of 1.45 T.