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US 7,064,643 B2Granted
Multi-phasemagnetic element and production method therefor
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsNobuya Matsutani, Hidenori Uematsu, Tsunetsugu Imanishi
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Abstract
A magnetic element for multi-phase is composed by burying a plurality of coils in a composite magnetic material such that a negative coupling of magnetic fluxes or a positive coupling of magnetic fluxes exists between at least two coils. This structure more miniaturizes inductors, or choke coils as the multi-phase magnetic element suitably used for application of a large current to many kinds of electronic equipment. Such multi-phase magnetic element has an excellent ripple current property.
Claims9
A magnetic element for multi-phase, comprising
- a coil with a winding axis in a straight line, the coil having a first end and a second end,
- a composite magnetic material buried within the coil,
- a first terminal provided intermediate the first end and the second end, the first terminal being exposed from the composite magnetic material,
- a second terminal provided at the first end, the second terminal being exposed from the composite magnetic material, and
- a third terminal provided at the second end, the third terminal being exposed from the composite magnetic material,
- wherein (1) a first part of the coil is disposed between the first terminal and the second terminal, (2) a second part of the coil is disposed between the first terminal and the third terminal, and (3) a coupling exists between a magnetic flux of the first part and a magnetic flux of the second part.
3 more elements
Dependencies are inferred from the claim text.