US 12,068,619 B2
Contactless power supply system
Yuusei Nakayashiki, Kariya (JP); and Masaya Takahashi, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Jun. 10, 2022, as Appl. No. 17/837,583.
Application 17/837,583 is a continuation of application No. PCT/JP2020/044215, filed on Nov. 27, 2020.
Claims priority of application No. 2019-224374 (JP), filed on Dec. 12, 2019.
Prior Publication US 2022/0302766 A1, Sep. 22, 2022
Int. Cl. H02J 50/50 (2016.01); H02J 50/05 (2016.01); H02J 50/12 (2016.01); H02J 50/40 (2016.01)
CPC H02J 50/50 (2016.02) [H02J 50/05 (2016.02); H02J 50/12 (2016.02); H02J 50/40 (2016.02)] 14 Claims
OG exemplary drawing
 
1. A contactless power supply system for vehicles, the contactless power supply system comprising:
a power transmitter including a first capacitor and a power transmission coil that transmits AC power, and having a first resonant frequency defined by the power transmission coil and the first capacitor;
a power receiver including a second capacitor and a power reception coil that receives AC power, and having a second resonant frequency defined by the power reception coil and the second capacitor; and
a repeater that:
transmits, to the power reception coil, AC power received from the power transmission coil, and
includes:
a relay power reception coil unit configured to receive the AC power transmitted from the power transmission coil and including at least one coil that defines a first stray capacitance for forming a first self-resonant frequency having a frequency identical to the first resonant frequency; and
a relay power transmission coil unit configured to transmit the AC power to the power receiver and including at least one coil that defines a second stray capacitance for forming a second self-resonant frequency having a frequency identical to the second resonant frequency,
the at least one coil of the relay power reception coil unit being directly electrically connected to the at least one coil of the relay power transmission coil unit.