Yazaki Corporation

Hajime Terayama

Shingo Tanaka

Kazuyoshi Kagami

You Yanagida

Kiyoshi Katou

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

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.

Growing community of inventors

Susono, Japan

Hajime Terayama