US 2002/0163413 A1Published application

Transformer or inductor containing a magnetic core

AssigneeConEv Inc.

InventorsJim Holdahl, Todd Settergren

Life of this patent

Estimating the term…

Loading patent…

Abstract

An electrical device for mounting on a circuit board, such as an inductor or a transformer. The device contains first and second core halves which can be mated to one another. Each half contains an outer skirt attached to a back-plane, and a center core component which is attached to the back-plane in a position which is perpendicular to the back-plane and to the circuit board, when mounted. The center core component has a primary axis and a secondary axis, the secondary axis having a smaller dimension than the primary axis, and a cross-section with a ratio of length of primary axis to length of secondary axis of 1.1:1 to 3.5:1. The outer skirt, back-plane, and center core component all contain magnetic material, e.g. ferrite. A bobbin having a hollow center section with a cross-section of similar shape to the cross-section of the center core components is attached to first and second flanges, each of which flanges has wire mounting posts on its bottom edge. At least one coil is wound around the exterior surface of the bobbin. When the first and second core halves are mated, the center core components are inserted into the center section of the bobbin to form a magnetic core. The coil is attached to at least one pair of wire mounting posts to allow electrical connection to the circuit board.

An electrical device for mounting on a circuit board, said device comprising a magnetic core and at least one coil wound around the core, which device comprises

(1) a first core half comprising
(a) a first outer skirt comprising first and second side walls connected by a top wall,
(b) a first back-plane connected to the first outer skirt to form a semi-enclosed housing, said first outer skirt and said first back-plane comprising a first magnetic material, and
(c) a first center core component which
(i) has a primary axis and a secondary axis, the secondary axis having a smaller dimension than the primary axis,
(ii) has a cross-section with a ratio of length of primary axis to length of secondary axis of 1.1:1 to 3.5:1
(iii) extends perpendicularly from the first back-plane so that the primary axis is perpendicular to the circuit board when the device is mounted, and
(iv) comprises a second magnetic material,
(2) a second core half is matable with the first core half, and which comprises
(a) a second outer skirt comprising first and second side walls connected by a top wall,
(b) a second back-plane connected to the second outer skirt to form a semi-enclosed housing, said second outer skirt and said second back-plane comprising the first magnetic material, and
(c) a second center core component which
(i) has a primary axis and a secondary axis, the secondary axis having a smaller dimension than the primary axis,
(ii) has a cross-section with a ratio of length of primary axis to length of secondary axis of 1.1:1 to 3.5:1,
(iii) extends perpendicularly from the second back-plane so that the primary axis is perpendicular to the circuit board when the device is mounted, and
(iv) comprises the second magnetic material,
(3) a bobbin which
(a) comprises an exterior surface and a hollow center section having a cross-section of similar shape to the cross-section of the first and second core components and sized for receiving the first and second core components, and
(b) is attached to first and second flanges, each of which flanges comprises wire mounting posts on its bottom edge;
and
(4) at least one coil which is wound around the exterior surface of the bobbin,
the first and second core halves being mated so that the first and second core components are inserted into the center section of the bobbin to form the magnetic coil and the coil is attached to at least one pair of wire mounting posts.

19 more elements

Abstract

Claims20