Inductance device
AssigneeSumida Corporation
InventorMitsugu Kawarai
Life of this patent
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Abstract
The superimposition characteristics are improved in an inductance device provided with coils having sections with different numbers of windings. The inductance device includes a ring-shaped coil having n winding section 31 in which the number of windings is n and n+1, magnetic circuit materials mounted within and without the ring of aforementioned coil through which magnetic flux is passed to form a magnetic circuit, and a magnetic gap that blocks either the magnetic flux that was formed so as to surround aforementioned n winding section 31 or the magnetic flux that was formed so as to surround aforementioned n+1 winding section 32.
Claims9
A multilayered-type inductance device comprising:
- a ring-shaped coil having an n winding section in which the number of windings is n, and an n+1 winding section in which the number of windings is one more than in the n winding section,
- a soft magnetic ceramic member embedding the ring-shaped coil, the soft magnetic ceramic member and the ring-shaped coil being layered into the device,
- wherein the soft magnetic ceramic member is mounted to at least partially surround the ring-shaped coil, an area of the n winding section or of the n+1 winding section is exposed outside of the soft magnetic ceramic member, and the soft magnetic ceramic member is a magnetic circuit material to form a magnetic circuit for passing a magnetic flux,
- said device having a magnetic gap between the soft magnetic ceramic member and only one of the n winding section or the n+1 winding section, to block either a portion of the magnetic flux formed around the n winding section or a portion of the magnetic flux formed around the n+1 winding section.
Dependencies are inferred from the claim text.