Wireless power supply system and wireless power supply method
AssigneeFujitsu Limited
InventorSatoshi Shimokawa
Life of this patent
Estimating the term…
Abstract
A wireless power supply apparatus includes: a transmitting coil configured to transmit power in the form of magnetic field energy using magnetic resonance; and a power transmitter configured to supply power at a resonant frequency that produces magnetic resonance between the transmitting coil and a receiving coil; wherein the power transmitter includes a detector configured to detect current flowing into the transmitting coil, a controller configured to control the frequency of the power supplied to the transmitting coil, and a determining unit configured to determine the coupling strength between the transmitting coil and the receiving coil on the basis of the frequency of the current detected by the detector as well as the frequency of the supplied power.
Claims9
A wireless power supply system, comprising:
- a transmitting coil configured to transmit power in the form of magnetic field energy using magnetic resonance;
- and
- a power transmitter configured to supply power at a resonant frequency that produces magnetic resonance between the transmitting coil and a receiving coil;
- wherein the power transmitter includes
- a detector configured to detect current flowing into the transmitting coil, a controller configured to control the frequency of the power supplied to the transmitting coil, and
- a determining unit configured to determine the coupling strength between the transmitting coil and the receiving coil on the basis of the frequency of the current detected by the detector as well as the frequency of the supplied power.
A wireless power supply system, comprising:
- a transmitting coil configured to transmit power in the form of magnetic field energy using magnetic resonance;
- a receiving coil configured to receive the magnetic field energy transmitted from the transmitting coil, and convert the received energy into power;
- and
- a power transmitter configured to supply power at a resonant frequency that produces magnetic resonance between the transmitting coil and the receiving coil;
- wherein the power transmitter includes
- a detector configured to detect current flowing into the transmitting coil,
- a controller configured to control the frequency of the power supplied to the transmitting coil, and
- a determining unit configured to determine the coupling strength between the transmitting coil and the receiving coil on the basis of the frequency of the current detected by the detector as well as the frequency of the supplied power.
A wireless power supply method, comprising the steps of:
- transmitting power from a transmitting coil in the form of magnetic field energy using magnetic resonance;
- supplying power at a resonant frequency that produces magnetic resonance between the transmitting coil and a receiving coil;
- detecting current flowing into the transmitting coil;
- and
- determining the coupling strength between the transmitting coil and the receiving coil on the basis of the frequency of the detected current.
Dependencies are inferred from the claim text.