Wireless power supply system, power transmitter, and power transmission method
First Claim
1. A wireless power supply system comprising:
- a power transmitter including a primary-side resonant coil and configured to transmit electric power; and
a plurality of power receivers including secondary-side resonant coils configured to receive the electric power from the primary-side resonant coil through magnetic field resonance or electric field resonance generated with the primary-side resonant coil,wherein the power transmitter groups the plurality of power receivers into a plurality of first groups based on degrees of coupling between the power transmitter and the respective power receivers in an initial state,wherein the power transmitter calculates, for the respective first groups, charging times required to charge all the power receivers, and calculates a first total charging time obtained by totaling the charging times for all the first groups,wherein the power transmitter sets, to the power receivers, degrees of coupling that are greater than or equal to the degrees of coupling in the initial state,wherein the power transmitter again groups the plurality of power receivers into a plurality of second groups based on the set degrees of coupling,wherein the power transmitter calculates, for the respective second groups, charging times required to charge all the power receivers, and calculates a second total charging time obtained by totaling the charging times for the second groups, andwherein the power transmitter starts to transmit the electric power when the second total charging time is less than or equal to the first total charging time.
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Accused Products
Abstract
A wireless power supply system includes: a power transmitter; and power receivers configured to receive power through magnetic field resonance or electric field resonance. The transmitter groups the receivers into first groups based on degrees of coupling between the transmitter and the respective receivers in an initial state. The transmitter calculates, for the respective first groups, charging times required to charge the receivers, and a first total charging time for the first groups. The transmitter sets degrees of coupling greater than or equal to the degrees of coupling in the initial state, and again groups the receivers into second groups based on the set degrees. The transmitter calculates, for the respective second groups, charging times required to charge the receivers and a second total for the second groups, and starts to transmit the power when the second total time is less than or equal to the first total time.
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Citations
13 Claims
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1. A wireless power supply system comprising:
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a power transmitter including a primary-side resonant coil and configured to transmit electric power; and a plurality of power receivers including secondary-side resonant coils configured to receive the electric power from the primary-side resonant coil through magnetic field resonance or electric field resonance generated with the primary-side resonant coil, wherein the power transmitter groups the plurality of power receivers into a plurality of first groups based on degrees of coupling between the power transmitter and the respective power receivers in an initial state, wherein the power transmitter calculates, for the respective first groups, charging times required to charge all the power receivers, and calculates a first total charging time obtained by totaling the charging times for all the first groups, wherein the power transmitter sets, to the power receivers, degrees of coupling that are greater than or equal to the degrees of coupling in the initial state, wherein the power transmitter again groups the plurality of power receivers into a plurality of second groups based on the set degrees of coupling, wherein the power transmitter calculates, for the respective second groups, charging times required to charge all the power receivers, and calculates a second total charging time obtained by totaling the charging times for the second groups, and wherein the power transmitter starts to transmit the electric power when the second total charging time is less than or equal to the first total charging time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A power transmitter, including a primary-side resonant coil, for transmitting electric power to a plurality of power receivers including secondary-side resonant coils configured to receive the electric power from the primary-side resonant coil through magnetic field resonance or electric field resonance generated with the primary-side resonant coil,
wherein the power transmitter groups the plurality of power receivers into a plurality of first groups based on degrees of coupling between the power transmitter and the respective power receivers in an initial state, wherein the power transmitter calculates, for the respective first groups, charging times required to charge all the power receivers, and calculates a first total charging time obtained by totaling the charging times for all the first groups, wherein the power transmitter sets, to the power receivers, degrees of coupling that are greater than or equal to the degrees of coupling in the initial state, wherein the power transmitter again groups the plurality of power receivers into a plurality of second groups based on the set degrees of coupling, wherein the power transmitter calculates, for the respective second groups, charging times required to charge all the power receivers, and calculates a second total charging time obtained by totaling the charging times for the second groups, and wherein the power transmitter starts to transmit the electric power when the second total charging time is less than or equal to the first total charging time.
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13. A power transmission method in a wireless power supply system, the wireless power supply system including a power transmitter including a primary-side resonant coil and configured to transmit electric power;
- and a plurality of power receivers including secondary-side resonant coils configured to receive the electric power from the primary-side resonant coil through magnetic field resonance or electric field resonance generated with the primary-side resonant coil, the power receivers including adjustment units configured to adjust degrees of coupling with the power transmitter, the power transmission method comprising;
causing the power transmitter to group the plurality of power receivers into a plurality of first groups based on degrees of coupling between the power transmitter and the respective power receivers in an initial state; causing the power transmitter to calculate, for the respective first groups, charging times required to charge all the power receivers, and to calculate a first total charging time obtained by totaling the charging times for all the first groups; causing the power transmitter to adjust the adjustment units to set the degrees of coupling that are greater than or equal to the degrees of coupling in the initial state; causing the power transmitter to again group the plurality of power receivers into a plurality of second groups based on the set degrees of coupling; causing the power transmitter to calculate, for the respective second groups, charging times required to charge all the power receivers, and to calculate a second total charging time obtained by totaling the charging times for the second groups; and causing the power transmitter to start to transmit the electric power when the second total charging time is less than or equal to the first total charging time.
- and a plurality of power receivers including secondary-side resonant coils configured to receive the electric power from the primary-side resonant coil through magnetic field resonance or electric field resonance generated with the primary-side resonant coil, the power receivers including adjustment units configured to adjust degrees of coupling with the power transmitter, the power transmission method comprising;
Specification