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US 6,583,701 B2Granted
Inductor with variable air-gap separation
AssigneeLite-On Electronics, Inc.
InventorsXiaodong Sun, Yanfang Liu
Life of this patent
Estimating the term…
Abstract
An inductor with multiple air-gap separations comprises a magnetic core and an enameled wire around the magnetic core. The magnetic core has an air gap with at least a large-gap portion and a small-gap portion. The small-gap portion provides enough inductance in case of low load input to prevent harmonic distortion. The large-gap portion provides enough inductance in case of heavy load output and low input voltage to prevent saturation and temperature rise, thus enhancing power efficiency.
Claims4
An electric inductor comprising:
- a first magnetic core segment having a first cross-sectional profile defined by relative placement of adjacent ones of a first plurality of silicon-steel plates;
- a second magnetic core segment having a second cross-sectional profile disposed in spaced apart relation to said first magnetic core segment, said first cross-sectional profile and said second cross-sectional profile defining therebetween a plurality of widening air-gap regions, each said widening air-gap region including adjacent small and large air gap portions, said large air gap portion being greater in width than said small air gap portion to define a stepped transition;
- and
- an enameled wire wrapped around at least one of said first and second magnetic core segments for carrying said electric current through the electric inductor.
1 more element
An electric inductor comprising:
- first and second magnetic core segments each including a plurality of stacked silicon-steel plates;
- said first magnetic core segment having a first cross-sectional profile;
- said second magnetic core segment having a second cross-sectional profile disposed in spaced apart relation to said first magnetic core segment, said first cross-sectional profile and said second cross-sectional profile defining therebetween a plurality of linearly widening air-gap regions, each said linearly widening air-gap region including both small and large air gap portions separated by an intermediate portion extending transversely relative to said stacked silicon-steel plates, said intermediate portion increasing linearly in width between said small and large air gap portions;
- and
- an enameled wire wrapped around at least one of said first and second magnetic core segments for carrying said electric current through the electric inductor.
2 more elements
An electric inductor comprising:
- a first magnetic core segment having a first cross-sectional profile;
- a second magnetic core segment having a second cross-sectional profile disposed in spaced apart relation to said first magnetic core segment, said first cross-sectional profile and said second cross-sectional profile defining therebetween a plurality of widening air-gap regions, each said widening air-gap region including both small and large air gap portions separated by an intermediate portion extending curvilinearly therebetween, said large air gap portion being greater in width than said small air gap portion;
- and,
- an enameled wire wrapped around at least one of said first and second magnetic core segments for carrying said electric current through the electric inductor.
1 more element
Dependencies are inferred from the claim text.