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US 6,642,828 B2Granted
Airgapped magnetic component
AssigneeEmerson Energy Systems AB
InventorsLars Kvarnsjö, Johan Svedendahl
Life of this patent
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Abstract
A high frequency inductor includes a high permeability core, and at least one winding (6), having at least one winding layer (6). The core (2,3) exhibits at least one air-gap arranged within the at least one winding (6), whereat the at least one air-gap separates the core into at least two parts (2,3) and that a screen (14) is arranged around the at least one gap (4,4′,4″), between the winding (6) and the gap (4,4′4″). The screen is essentially concentric with the winding, and has a width which is equal to or wider than the width of the at least one gap (4,4′,4″).
Claims10
A high frequency inductor comprising:
- a high permeability core;
- and
- at least one winding having at least one winding layer;
- wherein the core includes at least one air-gap arranged within the at least one winding, said at least one air-gap separating the core into at least two parts and wherein a screen is arranged around the at least one air-gap, between the winding and the air-gap, the screen being essentially concentric with the winding, said screen having a width which is equal to or wider than the width of the at least one air-gap, said screen being made from a material exhibiting high conductivity and arranged so as to cause local currents in the screen, thereby essentially reducing the effects of fringing fields caused by the at least one gap.
1 more element
Dependencies are inferred from the claim text.