ELECTRIC POWER TRANSMITTING APPARATUS AND METHOD FOR CONTROLLING ELECTRIC POWER TRANSMISSION
First Claim
1. An electric power transmitting apparatus that includes a first active electrode and a first passive electrode that generate capacitive coupling with a second active electrode and a second passive electrode of an electric power receiving apparatus when the respective active and passive electrodes are positioned to oppose each other, respectively, the apparatus comprising:
- a power supply circuit including an active terminal and a passive terminal, the passive terminal having a lower potential than the active terminal;
a reference potential terminal coupled to a reference potential;
an electric power transmitting surface having a plurality of electric power transmission units disposed thereon, and each electric power transmission unit comprising at least one electric power transmitting electrode;
a plurality of switching elements each coupled to a respective electric power transmitting electrode and each configured to switch connection states of the respective electric power transmitting electrode such that each electric power transmitting electrode is connected to either the active terminal, the passive terminal, or the reference potential terminal; and
a control circuit that control the switching elements based on a position of the second active electrode and the second passive electrode of the electric power receiving apparatus when the electric power receiving apparatus is positioned on the electric power transmitting surface.
1 Assignment
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Accused Products
Abstract
An electric power transmitting apparatus and a method for controlling electric power transmission that switches a connection state of a coupling electrode in accordance with the shape and the size of an electric power receiving apparatus, a position where the electric power receiving apparatus is placed.
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Citations
20 Claims
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1. An electric power transmitting apparatus that includes a first active electrode and a first passive electrode that generate capacitive coupling with a second active electrode and a second passive electrode of an electric power receiving apparatus when the respective active and passive electrodes are positioned to oppose each other, respectively, the apparatus comprising:
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a power supply circuit including an active terminal and a passive terminal, the passive terminal having a lower potential than the active terminal; a reference potential terminal coupled to a reference potential; an electric power transmitting surface having a plurality of electric power transmission units disposed thereon, and each electric power transmission unit comprising at least one electric power transmitting electrode; a plurality of switching elements each coupled to a respective electric power transmitting electrode and each configured to switch connection states of the respective electric power transmitting electrode such that each electric power transmitting electrode is connected to either the active terminal, the passive terminal, or the reference potential terminal; and a control circuit that control the switching elements based on a position of the second active electrode and the second passive electrode of the electric power receiving apparatus when the electric power receiving apparatus is positioned on the electric power transmitting surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An electric power transmission method for transmitting power by an electric power transmitting apparatus having a power supply circuit including an active terminal and a passive terminal, a reference potential terminal, and an electric power transmitting surface including a plurality of electric power transmission units disposed thereon, with each electric power transmission unit comprising at least one electric power transmitting electrode, the method comprising:
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detecting whether an electric power receiving apparatus is disposed on the electric power transmitting surface; connecting one of the at least one electric power transmitting electrodes to the active terminal of the power supply circuit in response to a frequency sweep of the electric power transmitting electrodes; connecting at least one second electric power transmitting electrode to the passive terminal of the power supply circuit; sweeping the frequency of each of the electric power transmitting electrodes to determine an operating frequency at which the one electric power transmitting electrode takes the maximum value as the operating frequency; and transmitting power by capacitive coupling from the electric power transmitting apparatus to the electric power receiving apparatus. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification