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:
May. 20, 2014
Filed:
Jun. 06, 2012
Samuel S. Outten, Washington, DC (US);
Thomas A. Hartmann, Wytheville, VA (US);
Samuel S. Outten, Washington, DC (US);
Thomas A. Hartmann, Wytheville, VA (US);
ABB Technology, Zurich, CH;
Abstract
A three step non-linear transformer core is formed from three sections of laminations each having different widths and cross-sectional areas. A first section of laminations is formed by cross-slitting a generally rectangular sheet or strip of metal. A resulting generally triangular segment is then wound upon a mold to form a first section of a core frame having a trapezoidal cross section. A second section of laminations is wound upon the first section of laminations to form a segment of a core frame having a rhombic cross section. The third section of laminations is wound upon the second section of laminations to form a segment of a core frame having a trapezoidal cross section. Each of the first, second, and third sections of laminations are offset from one another by a predetermined angle of offset.