Title:
COIL, COIL UNIT, AND WIRELESS POWER TRANSMISSION DEVICE, AND MANUFACTURING METHOD OF COIL
Document Type and Number:
Japanese Patent JP2021068815
Kind Code:
A
Abstract:
To provide a coil and a coil unit for wireless power transmission, which have high transmission efficiency and can be manufactured at low cost.SOLUTION: In a coil in which a stranded conductor including a plurality of strands with insulation on the surface is wound in a spiral shape, a magnetic tape having shrinkage and having magnetic powder fixed with a binder is wound around the outer circumference of a stranded wire, and the outer circumference of the stranded wire is covered with the magnetic tape all around. The relative magnetic permeability of the magnetic tape is 5 or more and 200 or less with respect to an alternating magnetic field having a frequency of 85 kHz, and the thickness of the magnetic tape may be 0.05 to 0.1 times the diameter of the stranded wire. The magnetic tape may have an adhesive layer.SELECTED DRAWING: Figure 1
Inventors:
MIZUNO TSUTOMU
SATO MITSUHIDE
BU YINGGANG
SATO MITSUHIDE
BU YINGGANG
Application Number:
JP2019193299A
Publication Date:
April 30, 2021
Filing Date:
October 24, 2019
Export Citation:
Assignee:
UNIV SHINSHU
International Classes:
H01F27/28; H01B7/00; H01B7/02; H01B7/18; H01B7/30; H01F5/00; H01F27/36; H01F38/14; H01F41/04; H02J50/12; H02J50/70; H05K9/00
Domestic Patent References:
| JP2018170480A | 2018-11-01 | |||
| JP3210770U | 2017-06-08 | |||
| JP2017027730A | 2017-02-02 | |||
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| JP2009129654A | 2009-06-11 | |||
| JP2011249022A | 2011-12-08 | |||
| JP2014071969A | 2014-04-21 | |||
| JP2021034707A | 2021-03-01 |
Foreign References:
| WO2015129001A1 | 2015-09-03 | |||
| WO2018055698A1 | 2018-03-29 |