# US 9,437,355 B2 · Amorphous metal core, induction apparatus using same, and method for manufacturing same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,437,355 B2 - Document ID: US9437355B2 - Status: Granted - Kind: B2 - Application number: 14/110,234 - Filed: 2012-04-09 - Published: 2014-01-30 - Granted: 2016-09-06 - Earliest claimed: 2011-04-08 - Assignees: Amogreentech Co., Ltd. - Applicants: Chun Geol Lee; Dong Wook Jang - Inventors: Chun Geol Lee; Dong Wook Jang - Web page: https://patentgrep.com/patent/US9437355B2 ## CPC - H01F 3/02: made from sheets - H01F 17/04: with magnetic core - H01F 27/245: made from sheets, e.g. grain-oriented (H01F27/26 takes precedence) - H01F 41/0233: {Manufacturing of magnetic circuits made from sheets (magnetic cores made from sheets H01F27/245; soft magnetic alloys in the form of sheets H01F1/16)} - H01F 41/0226: {from amorphous ribbons} - Y10T 29/49078: Laminated - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract Provided are an amorphous metal core that can minimize a core loss in which amorphous thin plate laminates are mutually combined by coupling protrusions and coupling recesses of assembly plates, an induction device, and a method of making the amorphous metal core. The amorphous metal core includes: a number of amorphous metal unit cores that include an amorphous thin plate laminate and a pair of assembly plates that are respectively laminated on the front and rear surfaces of the amorphous thin plate laminate, and are configured to have an I shape, respectively. The induction device includes: an amorphous metal core including a number of amorphous metal unit cores that are formed of an “I” shape, respectively; and at least one coil that is wound on at least one of the amorphous metal unit cores forming the amorphous metal core. ## Claims ### Claim 1 An amorphous metal core comprising; a number of amorphous metal unit cores that include an amorphous thin plate laminate formed by laminating a number of amorphous metal thin plates and a pair of assembly plates respectively laminated on the front and rear surfaces of the amorphous thin plate laminate, and are configured to have an “I” shape, respectively, and form a magnetic circuit having at least one air gap (G); and a coupling unit that separably couples two adjacent amorphous metal unit cores with each other with the at least one air gap formed in-between and with two adjacent assembly plates of the two adjacent amorphous metal unit cores being aligned on a plane, wherein the coupling unit comprises: at least one coupling protrusion formed on an end of the other two adjacent assembly plates and at least one coupling recess formed on an end of one of the two adjacent assembly plates, the at least one coupling protrusion being inserted into the at least one coupling recess to couple the two adjacent amorphous metal unit cores, wherein a length of the at least one coupling protrusion or a depth of the at least one coupling recess is configured to set a predetermined interval of the air gap. ### Claim 2 (depends on 1) The amorphous metal core according to claim 1, wherein the pair of the assembly plates are made of non-magnetic metal or crystalline magnetic material. ### Claim 3 (depends on 1) The amorphous metal core according to claim 1, wherein the amorphous metal thin plates are formed by slitting and cutting an amorphous metal ribbon. ### Claim 4 (depends on 1) The amorphous metal core according to claim 1, wherein the coupling protrusion protrudes from the amorphous thin plate laminate and the coupling recess partially exposes the amorphous thin plate laminate. ### Claim 5 (depends on 1) The amorphous metal core according to claim 1, wherein the amorphous metal unit cores comprises: two yokes that are arranged in parallel with each other; and at least two legs that mutually connect the two yokes and that are arranged in parallel to each other. ### Claim 6 (depends on 1) The amorphous metal core according to claim 1, wherein the coupling between the coupling protrusion and the coupling recess is implemented by a snap coupling or a compression coupling. ### Claim 7 An induction device comprising: an amorphous metal core including a number of amorphous metal unit cores whose both ends are mutually combined to form a magnetic circuit having at least one air gap and that are formed of an “I” shape, respectively; and at least one coil that is wound on at least one of the amorphous metal unit cores forming the amorphous metal core, wherein each of the amorphous metal unit cores comprises: an amorphous thin plate laminate formed by laminating a number of rectangular amorphous metal thin plates; and a pair of assembly plates respectively laminated on the front and rear surfaces of the amorphous thin plate laminate, and that include at least one coupling protrusion and at least one coupling recess that are formed on both ends of the amorphous thin plate laminate that are coupled when the amorphous metal unit cores are mutually combined with each other, the at least one coupling protrusion being inserted into the at least one coupling recess to couple two adjacent amorphous metal unit cores, and wherein a length of the at least one coupling protrusion or a depth of the at least one coupling recess is configured to set a predetermined interval of the air gap. ### Claim 8 (depends on 7) The induction device according to claim 7, wherein the amorphous metal unit cores comprises: two yokes that are arranged in parallel with each other; and at least two legs that mutually connect the two yokes and that are arranged in parallel to each other. ### Claim 9 (depends on 7) The induction device according to claim 7, further comprising an upper cover and a lower cover that surround the two yokes, wherein both sides of the upper cover and the lower cover are interconnected by a pair of tightening bolts, respectively.