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公开(公告)号：US10897164B2
公开(公告)日：2021-01-19
申请号：US15597275
申请日：2017-05-17
Applicant: SKF Magnetic Mechatronics
Inventor： Erwan Salahun , Joaquim Da Silva , Bruno Tellier
Abstract: The invention relates to a method of manufacturing a lamination stack used in a rotating electrical machine. The method includes providing naked sheets made of ferritic material; preparing both sides of each sheet so as to obtain a determined surface roughness; coating at least one side of each sheet with an chemically protective electrically insulating material; stacking the coated sheets; compressing the stack obtained; heating the compressed stack at a temperature above the melting temperature of the insulating material; and cooling down the compressed stack so as to form an integral lamination stack consisting of alternating sheets of ferritic material and layers of insulating material. The invention also relates to an electrical machine comprising such a lamination stack.
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公开(公告)号：US20170338699A1
公开(公告)日：2017-11-23
申请号：US15597275
申请日：2017-05-17
Applicant: SKF Magnetic Mechatronics
Inventor： Erwan Salahun , Joaquim Da Silva , Bruno Tellier
CPC classification number: H02K1/02 , H02K7/09 , H02K15/02 , H02K2201/09
Abstract: The invention relates to a method of manufacturing a lamination stack used in a rotating electrical machine. The method includes providing naked sheets made of ferritic material; preparing both sides of each sheet so as to obtain a determined surface roughness; coating at least one side of each sheet with an chemically protective electrically insulating material; stacking the coated sheets; compressing the stack obtained; heating the compressed stack at a temperature above the melting temperature of the insulating material; and cooling down the compressed stack so as to form an integral lamination stack consisting of alternating sheets of ferritic material and layers of insulating material. The invention also relates to an electrical machine comprising such a lamination stack.
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公开(公告)号：US11728696B2
公开(公告)日：2023-08-15
申请号：US17121148
申请日：2020-12-14
Applicant: SKF MAGNETIC MECHATRONICS
Inventor： Erwan Salahun , Joaquim Da Silva , Bruno Tellier
Abstract: A lamination stack for use in a rotating electrical machine includes a plurality of sheets of ferritic material. Each of the sheets has first and second sides that include asperities, and the asperities have a height of about two microns and a width of about two microns. A layer of electrically insulating material is provided between adjacent pairs of the ferritic sheets in the stack, and the asperities extend into the electrically insulating material.
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公开(公告)号：US20210099032A1
公开(公告)日：2021-04-01
申请号：US17121148
申请日：2020-12-14
Applicant: SKF MAGNETIC MECHATRONICS
Inventor： Erwan Salahun , Joaquim Da Silva , Bruno Tellier
Abstract: A lamination stack for use in a rotating electrical machine includes a plurality of sheets of ferritic material. Each of the sheets has first and second sides that include asperities, and the asperities have a height of about two microns and a width of about two microns. A layer of electrically insulating material is provided between adjacent pairs of the ferritic sheets in the stack, and the asperities extend into the electrically insulating material.
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