Patent ID: 6696913
Filing Date: 2004-02-24
Classification: H01F

Abstract:
A ferrite core for a low-distortion transformer, comprising:a horizontal middle element having an oval cross-section or flattened oval cross-section without corners, said oval cross-section or flattened oval cross-section having a longest diameter perpendicular to an attachment plane; two lateral parts that flank said horizontal middle element at both sides in a symmetrical arrangement, said two lateral parts being a same length as said middle element for a ferrite core without an air gap or a same length as said middle element plus a width of an air gap ferrite core with an air gap, said two lateral parts extending with a respectively constant cross-section along a longitudinal axis of the ferrite core, said two lateral parts comprising inwardly directed surfaces that follow said middle element's oval cross-section or flattened oval cross-section at a largely constant spacing without entirely surrounding it, said inwardly directed surfaces forming a cavity configured to accept a wound body that is opened wide downwardly toward said attachment plane and is not completely closed or completely closed upward; an end piece transversely arranged relative to said longitudinal axis, said end piece connecting said middle element and said two side parts such that lower edges of said middle element and lower edges of said side parts are situated in a plane parallel to said attachment plane; and said ferrite core being symmetrically structured with respect to a mirror plane that contains said longitudinal axis, said mirror plane being perpendicular to said attachment plane.