US 2012/0056485 A1 · Wireless Power Transfer System, Power Transfer Apparatus, and Power Reception Apparatus

Abstract

According to one embodiment, a wireless power transfer system performs electrical power transfer and signal communication by magnetic field resonance. A power transfer apparatus includes a first resonator configured to resonate at a predetermined frequency and to switch a Q-factor between high and low, and a first controller configured to set the Q-factor of the first resonator high in the electrical power transfer, and to set the Q-factor of the first resonator low in the signal communication. The power reception apparatus includes a second resonator configured to resonate at the predetermined frequency and to switch a Q-factor between high and low, and a second controller configured to set the Q-factor of the second resonator high when performing the electrical power transfer and to set the Q-factor of the second resonator low when performing the signal communication.

Claims20

Dependent claims

A wireless power transfer system configured to perform electrical power transfer and signal communication by magnetic field resonance between a power transfer apparatus and a power reception apparatus in a time-division manner,

wherein the power transfer apparatus comprises:
a first resonator configured to resonate at a predetermined frequency and to switch a Q-factor between high and low;
and
a first controller configured to set the Q-factor of the first resonator high when performing the electrical power transfer, and to set the Q-factor of the first resonator low when performing the signal communication, and
wherein the power reception apparatus comprises:
a second resonator configured to resonate at the predetermined frequency and to switch a Q-factor between high and low;
and
a second controller configured to set the Q-factor of the second resonator high when performing the electrical power transfer and to set the Q-factor of the second resonator low when performing the signal communication.

5 more elements

A power transfer apparatus for a wireless power transfer system configured to perform electrical power transfer and signal communication by magnetic field resonance between the power transfer apparatus and a power reception apparatus in a time-division manner, the power transfer apparatus comprising:

a resonator configured to resonate at a resonant frequency and to switch a Q-factor between high and low;
and
a controller configured to set the Q-factor of the resonator high when performing an electrical power transfer, and to set the Q-factor of the resonator low when performing a communication.

A power reception apparatus for a wireless power transfer system configured to perform electrical power transfer and signal communication by magnetic field resonance between a power transfer apparatus and the power reception apparatus in a time-division manner, the power reception apparatus comprising:

a resonator configured to resonate at a resonant frequency and to switch a Q-factor between high and low;
and
a controller configured to set the Q-factor of the resonator high when performing an electrical power reception, and to set the Q-factor of the resonator low when performing a communication.

Dependencies are inferred from the claim text.

Wireless Power Transfer System, Power Transfer Apparatus, and Power Reception Apparatus

Life of this patent

Wireless Power Transfer System, Power Transfer Apparatus, and Power Reception Apparatus

Life of this patent

Abstract

Claims20