Coil former, inductive component and method for adjusting an inductance

A method for adjusting an inductance value for a group of inductive components of a same design, the method comprising:

• wrapping at least some regions of a base body of a coil former with an electrically insulating foil, wherein a length of the electrically insulating foil is selected as a function of a target value of the inductance value;
• after the wrapping of the at least some regions of the base body of the coil former with the electrically insulating foil is complete, wrapping the coil former with a winding wire, such that the electrically insulating foil is entirely disposed at least in some regions between the winding wire and the base body;
• measuring an inductance of the inductive components after the wrapping with the winding wire;
• and
• either:
• changing a length of the electrically insulating foil for a further inductive component as a function of a deviation of a measured value from a target value, if the target value has not yet been reached,
• or selecting a foil with a greater length than the measured inductive components for the further inductive component, if the measured inductance is smaller than a desired target value,
• or selecting a foil with a shorter length than the measured inductive components, if the measured inductance is larger than a desired target value,
• or defining a length of the foil for the group of inductive components, if the target value is reached;
• wherein the electrically insulating foil extends over a maximum of two thirds of a maximum possible effective length of the electrically insulating foil, wherein the maximum possible effective length of the electrically insulating foil is the length of the electrically insulating foil with which the electrically insulating foil is present underneath the entire winding, with which the electrically insulating foil would be present underneath the entire winding such that in some regions the winding wire is disposed over the electrically insulating foil, and in some regions the winding wire is disposed directly on the base body, and such that a diameter of the winding in a region in which the winding wire is disposed over the electrically insulating foil is increased compared to a diameter of the winding where the winding wire is disposed directly on the base body.