Patent ID: 6640419
Filing Date: 2003-11-04
Classification: H01F,Y10T

Abstract:
A method of making a magnetic circuit (1) comprising a coil (2) and a magnetic core (3) comprises the steps of making said coil (2) by winding a conducting wire (6) on a mandrel (12) having first and second ends, the first end being configured in smaller diameter than the second end, such that they form a conical shape in a direction of insertion of the coil on the magnetic core; inserting the coil (2) on the magnetic core (3), said magnetic core comprising a magnetic material in a form of an open spire having ends (16, 16â€²), said open spire being formed before providing the magnetic material with specified magnetic properties; and deforming the ends (16, 16â€²) of the magnetic core in a substantially orthogonal direction (O) to a plane of the magnetic circuit in order to move said ends closer together.