Title:
WIRELESS POWER RECEPTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/204226
Kind Code:
A1
Abstract:
A wireless power reception device (10) includes power reception coils (211, 221, 231, 241), power reception resonance circuits (210, 220, 230, 240), and rectifier circuits (31-34). Power reception current is generated in each of the power reception coils (211, 221, 231, 241) as a result of coupling to an external magnetic field. The power reception resonance circuit (210) is configured by including the power reception coil (211) and a capacitor (212); the power reception resonance circuit (220) is configured by including the power reception coil (221) and a capacitor (222); the power reception resonance circuit (230) is configured by including the power reception coil (231) and a capacitor (232); and the power reception resonance circuit (240) is configured by including the power reception coil (241) and a capacitor (242). The rectifier circuits (31-34) are respectively connected to the power reception resonance circuits (210, 220, 230, 240), and rectify resonance current. The power reception coils (211, 221) are flat spiral coils, and the power reception coils (231, 241) are cylindrical solenoid coils. The power reception coils (211. 221) and the power reception coils (231, 241) are disposed in a state in which the plane of the spiral coils and the axis of the cylindrical shape of the solenoid coils are non-parallel. In a stage after the rectifier circuits (31-34), an electrical power add circuit (40) adds DC output of the rectifier circuits (31-34) and supplies electrical power to a load (72).
Inventors:
KAIWA KOYO (JP)
HOSOTANI TATSUYA (JP)
HOSOTANI TATSUYA (JP)
Application Number:
PCT/JP2023/015536
Publication Date:
October 26, 2023
Filing Date:
April 19, 2023
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H02J50/40; H02J7/00; H02J50/12
Domestic Patent References:
| WO2015163296A1 | 2015-10-29 |
Foreign References:
| JPH01206482A | 1989-08-18 | |||
| US20180062441A1 | 2018-03-01 |
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (JP)
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