Yazaki Corporation

Toyota Jidosha Kabushiki Kaisha

Kazuyoshi Kagami

Shingo Tanaka

Hajime Terayama

Satoru Horiuchi

Shinji Ichikawa

Hiroaki Yuasa

You Yanagida

Noritaka Taguchi

Nobuhiro Kibudera

Masamitsu Ookawa

Syuhei Ejima

Kiyoshi Katou

A power reception apparatus to which power is transferred from a power transmission apparatus in a contactless manner includes: a ferrite provided in a plate shape and having a first principal face and a second principal face; an annular coil provided on the first principal face of the ferrite; and a shield provided on the second principal face of the ferrite, wherein an outer peripheral portion of the coil is placed on an inner side relative to an outer peripheral portion of the ferrite, such that part of the first principal face is exposed on an outer-peripheral-portion side of the ferrite, and an outer peripheral side of the shield includes a stepped portion provided at a position away from the second principal face of the ferrite, such that part of the second principal face is exposed on the outer-peripheral -portion side of the ferrite.

Power reception apparatus and power transmission apparatus

A power supplying system magnetically resonates between a primary resonant coil that configures a primary core unit and a secondary resonant coil that configures a secondary core unit for contactlessly supplying the power. The primary and secondary resonant coils are wound around the primary and secondary ferrite cores respectively, and face each other in the direction perpendicular to the axial direction of the primary and secondary resonant coils when supplying the power. The primary and secondary ferrite cores are divided into a plurality of portions along the axial direction of the primary and secondary resonant coils such that a width of the both end portions is shorter than a width of the center portion.

Coil unit and power supplying system

Provided is a power supply system in which an electromagnetic leakage is prevented. A power supply side resonance coil provided to a power supply unit and a power receiving side resonance coil provided to a power receiving unit are housed respectively in a conductive power supply side shield case and power receiving side shield case. The power supply side shield case is formed of a bottom wall covering a side of the power supply side resonance coil spaced apart from the power receiving side resonance coil and a vertical wall erecting from a periphery of the bottom wall, and a ferrite is provided onto surfaces of the bottom wall and the vertical wall.

Power supply unit, power receiving unit, and power supply system

Primary and secondary resonance circuits and include primary and secondary resonance coils and primary and secondary capacitors, respectively. Non-contact power supply is conducted by electromagnetic resonance of the primary and secondary resonance circuits and. A changeover circuit changes over connection of the secondary resonance coil and the secondary capacitor to a series connection or a parallel connection. A detection circuit detects impedance on a power receipt side. A changeover control circuit controls changeover conducted by the changeover circuit, depending upon the impedance detected by the detection circuit.

Power supply system and resonance circuit

There is provided a shield case allowing efficient power delivery while ensuring environmental resistant such as strength and waterproof and provided a contactless feed system using the shield case. A contactless feed system includes: a feed-side device installed in a fixed body; a receive-side device installed in a mobile body and fed electric power from the feed-side device in a contactless manner, and a shield case used in the feed-side device of the contactless feed system includes: a case open toward the receive-side device; a coil housed in an interior of the case; and a cover covering an opening of the case, wherein a load support member extending from a bottom surface of the case to an inner surface of the cover is provided inside the case.

Contactless feed system and shield case for the same

In a power supplying side core around which a power supplying side resonant coil is wound that contactlessly supplies power to a power receiving side resonant coil, a pair of protrusion portions is provided that protrudes from central axis direction both sides of the power supplying side resonant coil toward the power receiving side resonant coil. Further, in a power receiving side core around which the power receiving side resonant coil is wound that contactlessly receives power from the power supplying side resonant coil, a pair of protrusion portions is provided that protrudes from central axis direction both sides of the power receiving side resonant coil toward the power supplying side resonant coil.

Coil unit and contactless power supplying apparatus

An object of the present invention is to provide a power supplying system able to supply electric power with high efficiency from a power supplying section to a power receiving section by suppressing a reduction of transmission efficiency caused by a gap between central axes of a power supplying coil and a power receiving coil. Two power supplying helical coils are provided. When a power receiving coil is arranged opposite to the power supplying helical coils with a gap in an axis direction thereof, electric power is transmitted from the power supplying helical coils by electromagnetic resonance. A CPU detects one closest to the power receiving coil of two power supplying helical coils as an adjacent coil, and controls on/off of the switches so as to supply the electric power to only the adjacent coil.

Growing community of inventors

Susono, Japan

Kazuyoshi Kagami