US 12,151,570 B2
Contactless power supply system and coil unit thereof
Mitsuru Shibanuma, Kariya (JP); Masaya Takahashi, Kariya (JP); Eisuke Takahashi, Kariya (JP); and Nobuhisa Yamaguchi, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Dec. 9, 2022, as Appl. No. 18/078,306.
Application 18/078,306 is a continuation of application No. PCT/JP2021/020396, filed on May 28, 2021.
Claims priority of application No. 2020-100608 (JP), filed on Jun. 10, 2020.
Prior Publication US 2023/0110224 A1, Apr. 13, 2023
Int. Cl. B60L 53/122 (2019.01); B60L 5/00 (2006.01); H02J 50/12 (2016.01); H02J 50/40 (2016.01); H02J 50/70 (2016.01); H02J 50/90 (2016.01)
CPC B60L 53/122 (2019.02) [B60L 5/005 (2013.01); H02J 50/12 (2016.02); H02J 50/402 (2020.01); H02J 50/70 (2016.02); H02J 50/90 (2016.02)] 4 Claims
OG exemplary drawing
 
1. A coil unit for supplying electric power to a moving object, the coil unit comprising:
a plurality of coils for electric power transfer, the plurality of coils including a first coil and a second coil adjacent to the first coil in a moving direction of the moving object; and
a magnetic flux reduction structure that reduces, during electric power transfer using the first coil, magnetic flux by which the first coil causes an induced voltage or induced current to be generated in the second coil,
wherein:
the first coil includes a first coil section that generates magnetic flux in a first direction, and a second coil section that generates magnetic flux in a second direction opposite to the first direction;
the magnetic flux reduction structure comprises a structure where the first coil and the second coil are arranged so that the magnetic fluxes, which are generated respectively by the first and second coil sections of the first coil at a location where the second coil is present, at least partially cancel each other out;
the first coil section and the second coil section are identical in shape and number of turns to each other;
the first coil section and the second coil section are connected in series with each other;
the second coil includes a third coil section that generates, during the electric power transfer, magnetic flux in a third direction, and a fourth coil section that generates, during the electric power transfer, magnetic flux in a fourth direction opposite to the third direction;
the third coil section and the fourth coil section are identical in shape and number of turns to each other;
the third coil section and the fourth coil section are connected in series with each other; and
a direction in which the first and second coil sections of the first coil are aligned and a direction in which the third and fourth coil sections of the second coil are aligned intersect or are skewed with respect to each other.