Inductive device
AssigneeKoninklijke Philips N.V.
InventorsBernd ACKERMANN, Albert GARCIA I TORMO, Peter LUERKENS
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Abstract
High voltage DC generators based on a resonant tank include power inductors. As the demands on power output increase, but the demands on size of such high voltage DC generators decrease, the effect of radiated magnetic emissions become more significant. The present invention concerns a design for an inductive device, and a method for the assembly of an inductive device, in which a winding facing surface of the inductive device is a continuous portion, so that no air gap is present facing the winding facing surface. This reduces leakage of magnetic flux from the inductive device.
Claims15
An inductive device, comprising:
- an outer magnetic core arrangement formed from a first material;
- a winding support member having wound thereupon a winding having a first winding turn;
- wherein winding facing surfaces of an inner surface of the outer magnetic core arrangement are defined as the inner surfaces of the outer magnetic core arrangement which face the winding of the winding support member;
- wherein the outer magnetic core arrangement is configured such that any two arbitrary points on the winding facing surface are connectable via a straight construction line, wherein a path of the construction line does not intersect with other parts of the outer magnetic core arrangement;
- wherein the winding support member and the winding are enclosed within the outer magnetic core arrangement;
- wherein the respective winding facing surface of the outer magnetic core arrangement is a continuous portion of the first material of the outer magnetic core arrangement;
- wherein the area enclosed by the first winding turn defines a winding plane, and wherein a straight line perpendicular to the winding plane intersects the winding facing surface, such that, in operation, a magnetic field is substantially contained within the outer magnetic core arrangement;
- and
- wherein the outer magnetic core arrangement is provided as a ring core, inside which the winding support member is arranged, with a center axis of the winding support member being arranged so the ends of the winding support member face the inside surface of the outer magnetic core arrangement.
A method of manufacturing an inductive device, comprising:
- providing an outer magnetic core arrangement formed from a first material;
- wherein a winding facing surface of an inner surface of the outer magnetic core arrangement is defined as the inner surface of the outer magnetic core arrangement which faces the winding of the winding support member;
- wherein the outer magnetic core arrangement is configured such that any two arbitrary points on the winding facing surface are connectable via a straight construction line, wherein a path of the construction line does not intersect with other parts of the outer magnetic core arrangement;
- providing a winding support member having wound thereupon a winding having a first winding turn;
- and
- assembling the outer magnetic core arrangement and the winding support member such that the winding support member and the winding are enclosed within the outer magnetic core arrangement,
- wherein the winding facing surface of the outer magnetic core arrangement is a continuous portion of the first material;
- wherein the area enclosed by the first winding turn defines a winding plane, and wherein a straight line perpendicular to the winding plane intersects the winding facing surface, such that, in operation, a magnetic field is substantially contained within the outer magnetic core arrangement;
- providing the outer magnetic core arrangement as a ring core, inside which the winding support member is arranged, with a center axis of the winding support member being arranged so the ends of the winding support member face the inside surface of the outer magnetic core arrangement.
Dependencies are inferred from the claim text.