Patent ID: 9183974
Filing Date: 2015-11-10
Classification: H01F

Abstract:
1. A bobbin apparatus for supporting a core assembly, the core assembly including an air gap having an axial gap distance, the bobbin apparatus comprising: a bobbin body having a first bobbin end and a second bobbin end, the second bobbin end spaced from the first bobbin end; an axial passage defined through the bobbin body between the first and second bobbin ends, the bobbin body including an inner passage surface substantially facing the axial passage, the core assembly insertable into the axial passage with the air gap of the core assembly located at an air gap position between the first and second bobbin ends; a winding surface disposed on the bobbin body between the first and second bobbin ends; and a step having an outer step surface protruding from the winding surface between the first and second bobbin ends, the step located on the winding surface in substantial alignment with the air gap position, the step having a step height defined as the distance between the inner passage surface and the outer step surface, wherein the step height is at least as great as the axial gap distance, wherein the step further comprises an axial step width at least as great as twice the axial gap distance.