US 12,136,833 B2
Contactless power feeding apparatus
Goro Nakao, Kyoto (JP); Hiroaki Ota, Kyoto (JP); Ken Onozaka, Kyoto (JP); Yuki Ito, Kyoto (JP); Taichi Mishima, Kyoto (JP); and Yusuke Kawai, Kyoto (JP)
Assigned to OMRON CORPORATION, Kyoto (JP)
Filed by OMRON Corporation, Kyoto (JP)
Filed on Nov. 21, 2022, as Appl. No. 18/057,237.
Claims priority of application No. 2021-202804 (JP), filed on Dec. 14, 2021.
Prior Publication US 2023/0187982 A1, Jun. 15, 2023
Int. Cl. H02J 50/80 (2016.01); H02J 50/12 (2016.01)
CPC H02J 50/80 (2016.02) [H02J 50/12 (2016.02)] 3 Claims
OG exemplary drawing
 
1. A contactless power feeding apparatus comprising:
a power transmitting apparatus; and
a power receiving apparatus to which power is contactlessly transmitted from the power transmitting apparatus, wherein
the power transmitting apparatus comprises:
a transmission coil for supplying power to the power receiving apparatus;
a power supply circuit configured to supply AC power having a predetermined drive frequency to the transmission coil;
a power receiving circuit configured to receive returning power transmitted from the power receiving apparatus; and
a control circuit configured to control the power supply circuit to supply AC power having the drive frequency to the transmission coil, and perform control, according to a voltage of the returning power, such that an output voltage of the power receiving apparatus is in a predetermined allowable range, and
the power receiving apparatus comprises:
a resonant circuit comprising a receiver coil for receiving power via the transmission coil of the power transmitting apparatus, and a resonance capacitor that resonates together with the receiver coil;
a rectifier circuit configured to rectify power received via the resonant circuit; and
a power transmitting circuit configured to transmit the returning power according to a voltage of power output from the rectifier circuit to the power transmitting apparatus, and wherein
the power receiving circuit comprises a counter-receiver coil for receiving the returning power, and the counter-receiver coil and the transmission coil are arranged such that a winding axis of the counter-receiver coil matches a winding axis of the transmission coil; and
the power transmitting circuit comprises a counter-transmission coil for transmitting the returning power, and the counter-transmission coil and the receiver coil are arranged such that a winding axis of the counter-transmission coil matches a winding axis of the receiver coil.