JPWO2021053068A5 - - Google Patents

Claims (14)

an inductive component,
a wire winding (3) around which a magnetic foil (2) is wound; and an electrical shielding (16) surrounding the wound magnetic foil (2), said magnetic foil (2) having at least one magnetic a layer (9), said at least one magnetic layer (9) comprising a magnetic material, said magnetic material comprising a nanocrystalline iron alloy, said inductive component comprising a plastic, said magnetic foil (2 ) and the wire winding (3), further comprising a non-magnetic and non-conductive insulating layer. Guiding component according to claim 1, wherein the magnetic foil (2) is self-adhesive. Inductive component according to any one of claims 1 to 2, wherein the magnetic foil (2) is wound in multiple layers (18, 19, 20, 21) around a wire winding. Inductive component according to any one of claims 1 to 3, comprising a magnetic core arranged within the wire winding (3). Inductive component according to any one of claims 1 to 4, comprising no magnetic core within the wire winding (3). Inductive component according to any of the preceding claims, wherein the magnetic foil (2) comprises, in addition to at least one magnetic layer (9), a non-magnetic carrier layer (7, 8). Inductive component according to any of the preceding claims, wherein the magnetic material of the foil (2) is constituted in the form of particles (11) embedded in a non-magnetic material (12). Inductive component according to any one of the preceding claims, wherein the magnetic layer (9) is made entirely of magnetic material. Inductive component according to any of the preceding claims, wherein the magnetic foil (2) has a maximum thickness of 100 μm. A method for adjusting the inductance value of an inductive component, comprising: providing a wire winding (3); applying a non-magnetic and non-conductive insulating layer comprising plastic over the wire winding (3); The wire winding (3) and said insulating layer are wound with a magnetic foil (2), said magnetic foil (2) comprising at least one magnetic layer (9), said at least one magnetic layer (9) comprising a magnetic material. A method comprising: said magnetic material being a nanocrystalline iron alloy, and after wrapping the magnetic foil (2), an electrical shielding (16) is applied over the wound magnetic foil (2). 11. The method according to claim 10, wherein the number of layers of the rolled foil (2) or the thickness of the magnetic layer of the foil (2) is selected as a function of the target value of the inductance (L). The inductance (L) of the component (1) is measured before and/or after being wrapped with the foil (2) and the number of layers of the wrapped foil (2) is determined by the measurement 12. A method according to claim 10 or 11, wherein the value is changed as a function of the deviation from the target value. During the measurement, said foil (2) is wrapped around said wire winding (3) for part of its length and extends from said wrapped form for a further part of its length. 13. The method according to claim 12, wherein, after the measurement, the foil (2) is further wound onto the wire winding (3). Method according to any one of claims 10 to 13, wherein the extension of the foil (2) is cut after the foil (2) has been applied.