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Wireless power transmission system for transmitting alternating-current power wirelessly

專利號
US10097039B2
公開日期
2018-10-09
申請人
FURUKAWA ELECTRIC CO., LTD.（JP Tokyo）
發(fā)明人
Masahiro Kusunoki; Mitsuru Masuda
IPC分類
H02J5/00; H02J50/12; H02J7/02; H02J50/05
技術(shù)領(lǐng)域
coupler,electrode,power,electrodes,in,annular,reception,fig,inductors,center
地域： Tokyo

摘要

[OBJECT] There is provided a wireless power transmission system capable of transmitting power efficiently even when it is rotated.[ORGANIZATION] A power transmission device has a first and a second electrode (a center electrode 311 and an annular electrode 312) each having a rotationally symmetrical shape with respect to a common center axis, a first and a second connection line (connection lines 315, 316), and a first inductor to (inductor 313, 314). A power reception device has a third and a fourth electrode (center electrode 321 and annular electrode 322) each having a rotationally symmetrical shape with respect to a common center axis, a third and a fourth connection line (connection lines 325, 326), and a second inductor. The electrodes of the power transmission device and the power reception device are disposed to oppose each other across a distance of λ/2π or less as a near field, and a resonance frequency of a coupler constituted of the first and the second electrode and the first inductor and a resonance frequency of a coupler constituted of the third and the fourth electrode and the second inductor (inductor 323, 324) are set to be substantially equal.

說明書

FIG. 21 is a view illustrating a state of the case where a power reception coupler illustrated in FIG. 18 is rotated 90 degrees counterclockwise.

FIG. 22 is a diagram illustrating frequency characteristics of transmission efficiency and reflection loss of the wireless power transmission system illustrated in FIG. 21.

FIG. 23 is a diagram illustrating a smith chart of impedance of a power transmission coupler illustrated in FIG. 21.

FIG. 24 is a view illustrating an example of another variant embodiment of the present invention.

FIG. 25 is a diagram illustrating frequency characteristics of transmission efficiency and reflection loss of the wireless power transmission system illustrated in FIG. 24.

FIG. 26 is a diagram illustrating a smith chart of impedance of a power transmission coupler illustrated in FIG. 24.

FIG. 27 is a view illustrating a state of the case where a power reception coupler illustrated in FIG. 24 is rotated 90 degrees counterclockwise.

FIG. 28 is a diagram illustrating frequency characteristics of transmission efficiency and reflection loss of the wireless power transmission system illustrated in FIG. 27.

權(quán)利要求

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