Title:
WIRELESS POWER TRANSMISSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/201147
Kind Code:
A1
Abstract:
In a conventional power transmission device that wirelessly transmits power to a mobile object through a phased array antenna, the power transmission direction is fixed when a rotating element electric field vector (REV) method is executed, and thus the accuracy of the REV method is not high. Provided is a wireless power transmission device comprising: a transmission antenna 50 including a plurality of element antennas 8 for emitting radio waves 2 and a plurality of element modules 9 each provided for a predetermined number of the element antennas 8 and each having a phase shifter 13 for changing the phase of a transmission signal emitted as the radio waves 2 and an amplifier 14 for amplifying the transmission signal; and an REV method phase control unit 27 that causes a manipulation phase shifter, which is one or more of the phase sifters 13, to change the phase of the transmission signal by a phase-shift amount obtained by adding a manipulation phase amount for executing the REV method and a direction change phase amount for changing the power transmission direction, so that changing the phase-shift amount of the manipulation phase shifter in a state in which at least one or more of the element antennas 8 are emitting the radio waves is repeated while changing the manipulation phase shifter.
Inventors:
SAWA MANABU (JP)
HOMMA YUKIHIRO (JP)
HOMMA YUKIHIRO (JP)
Application Number:
PCT/JP2021/013968
Publication Date:
October 07, 2021
Filing Date:
March 31, 2021
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02J50/20; G01S3/42; H01Q1/28; H01Q3/04; H01Q3/26; H02J50/40; H02J50/80; H02J50/90
Domestic Patent References:
| WO2018221022A1 | 2018-12-06 |
Foreign References:
| US20170288475A1 | 2017-10-05 |
Attorney, Agent or Firm:
MURAKAMI, Kanako et al. (JP)
Download PDF: