Title:
PLANAR ARRAY COIL AND SWITCHING POWER SUPPLY DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/035968
Kind Code:
A1
Abstract:
This planar array coil (101) is provided with a multilayer board (10) on which are formed a plurality of coils (L1, L2, L3) having a first end thereof connected to a switching circuit section of a power conversion circuit and a second end thereof connected to a shared output unit. The coils (L1, L2, L3) are arranged on the surface of the multilayer board (10). The coils (L1, L2, L3) are each provided with two coil sections (L1a, L1b), (L2a, L2b), (L3a, L3b) in which the swirl directions of current are opposite from each other. The coils (L1, L2, L3) are arranged such that one coil section among the two coil sections is adjacent to the other one coil sections. The plurality of coils (L1, L2, L3) are connected to each other such that the current flowing in parts parallel to each other in the adjacent coil sections is made to flow in the same direction by operation of the switching circuit. As a result, it is possible to obtain a planar array coil (101) in which adverse effects resulting from unnecessary coupling between adjacent coils are suppressed and a switching power supply device that is provided with the planar coil array (101) and that performs stable power conversion operation.
Inventors:
HOSOTANI TATSUYA (JP)
MIKI OSAMU (JP)
MIKI OSAMU (JP)
Application Number:
PCT/JP2019/007492
Publication Date:
February 20, 2020
Filing Date:
February 27, 2019
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01F17/00; H01F27/28; H01F37/00; H02M3/155
Foreign References:
| JPS61173166U | 1986-10-28 | |||
| JP2006024739A | 2006-01-26 | |||
| JP2001358493A | 2001-12-26 | |||
| JP2015231311A | 2015-12-21 | |||
| JPH08181018A | 1996-07-12 |
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (JP)
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