Method of manufacturing a magnetic element for multi-phase
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.
Claims4
A method of producing a magnetic element for multi-phase operation comprising,
- mixing soft magnetic alloy particles and an insulation binding agent to prepare a mixture,
- pressing the mixture to make a formed body such that a coil is buried in the mixture, the coil having:
- a first end;
- a second end;
- a first terminal between the first end and the second end, said first terminal being exposed from the formed body;
- a second terminal at the first end;
- and
- a third terminal at the second end;
- a first part between the first terminal and the first end;
- and
- a second part between the first terminal and the second end;
- wherein the coil is for generating a coupling between a magnetic flux of the first part and a magnetic flux of the second part;
- and
- hardening the insulation binding agent,
- and wherein the first, second, and third terminals are integral with the coil portion and formed by punching.
A method of manufacturing a magnetic element for multi-phase operation, comprising:
- mixing soft magnetic alloy particles and an insulation binding agent to prepare a mixture,
- pressing the mixture so as to make a formed body such that a first punched coil and a second punched coil are buried in the mixture, the first punched coil having a first coil portion, a first terminal at a first end thereof, and a second terminal at a second end thereof, the first and second terminals being integral with the first coil portion, the second punched coil having a second coil portion, a third terminal at a first end thereof, and a fourth terminal at a second end thereof, the third and fourth terminals being integral with the second coil portion, and
- hardening the insulation binding agent,
- wherein the terminals protrude from the formed body,
- and wherein the coils are for generating a coupling between a magnetic flux of the first punched coil and a magnetic flux of the second punched coil.
Dependencies are inferred from the claim text.