Title:
ARRAY-TYPE POWER INDUCTOR AND SWITCHING POWER SUPPLY SYSTEM DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/090419
Kind Code:
A1
Abstract:
This array-type power inductor comprises: two or more main conductors that each have a non-turning linear steric structure and individually form a plurality of inductors; a magnetic body comprising a magnetic material that forms magnetic paths of magnetic fluxes generated by electric current flowing through the plurality of main conductors; and a plurality of external terminals that are disposed outside the magnetic body and that are electrically connected to the respective main conductors. The plurality of main conductors are disposed in parallel with each other so as to have a structure in which the magnetic body is present at the adjacent inner sides of the main conductors. The plurality of external terminals are connected to an external power conversion circuit such that current flows in the same direction through the plurality of main conductors. The magnetic body comprises: an inner leg part at the inner side where the plurality of main conductors are adjacent to each other; and outer leg parts at the outer sides where the main conductors are not adjacent to each other. The inner leg part has a first gap that forms a first magnetic path for a magnetic flux which passes along the inner leg part, in magnetic fluxes generated by electric current flowing through one of the main conductors. Each of the outer leg parts has a second gap that forms a second magnetic path for a magnetic flux that does not pass along the inner leg part but passes along the outer leg part, in the magnetic fluxes generated by electric current flowing through the one of the main conductors. The magnetic fluxes generated by electric current flowing in the same direction through the plurality of main conductors cause a physical phenomenon of cancelling each other at the inner leg part and strengthening each other at the outer leg parts. The array-type power inductor is provided with a structure in which the magnetic resistance formed by the second gap is greater than that formed by the first gap, and the plurality of inductors are integrally formed, the inductors having a magnetic structure in which the entirety, including the inner leg part, the outer leg parts, the first gap, and the second gap, is integrated.
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Inventors:
HOSOTANI TATSUYA (JP)
Application Number:
PCT/JP2023/038302
Publication Date:
May 02, 2024
Filing Date:
October 24, 2023
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01F37/00; H01F27/24; H02M3/155
Foreign References:
| JP2021180272A | 2021-11-18 | |||
| JP2019129253A | 2019-08-01 | |||
| JP2010027758A | 2010-02-04 | |||
| JP2008078177A | 2008-04-03 |
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (JP)
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