WIRELESS POWER TRANSMISSION SYSTEM
First Claim
1. A wireless power transmission system for transmitting power by a non-contact method over a resonant magnetic field with a resonant frequency f0, the system comprising a power-transmitting resonator and a power-receiving resonator,wherein one of the power-transmitting and power-receiving resonators includes a first inductor of a first size and the other resonator includes a second inductor of a second size that is smaller than the first size, andwherein at the resonant frequency f0, at least a part of wiring that forms the second inductor has a resistance value Rs per unit length that is lower than the resistance value RL per unit length of wiring that forms the first inductor.
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Accused Products
Abstract
A wireless power transmission system is designed to transmit power between a power-transmitting resonator 105 and a power-receiving resonator 107, which are implemented as inductors LL and Ls of mutually different sizes, by a non-contact method over a resonant magnetic field with a resonant frequency f0. When measured at the resonant frequency f0, the resistance value Rs per unit length of at least a part of wiring that forms the smaller inductor Ls is lower than that (RL) of wiring that forms the other larger inductor LL. In this manner, high transmission efficiency can be maintained between those power-transmitting and power-receiving resonators without increasing the overall length of wiring used wastefully.
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Citations
9 Claims
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1. A wireless power transmission system for transmitting power by a non-contact method over a resonant magnetic field with a resonant frequency f0, the system comprising a power-transmitting resonator and a power-receiving resonator,
wherein one of the power-transmitting and power-receiving resonators includes a first inductor of a first size and the other resonator includes a second inductor of a second size that is smaller than the first size, and wherein at the resonant frequency f0, at least a part of wiring that forms the second inductor has a resistance value Rs per unit length that is lower than the resistance value RL per unit length of wiring that forms the first inductor.
Specification