Method and system for wireless power supply
First Claim
1. A method for wireless power supply in which power is supplied wirelessly from a power transmission antenna to a power reception antenna, the power transmission antenna including a plurality of power transmission antenna elements, and the power reception antenna including a plurality of power reception antenna elementswhereina power transmission surface of the power transmission antenna and a power reception surface of the power reception antenna are parallel and opposite to each other, anda reflector is provided outside the power reception surface and inwardly inclined at a predetermined angle with respect to the power reception surface,wherein the method includes a misalignment correction operation prior to a wireless power supply operation, andduring the misalignment correction operation, the method comprises:
- allowing at least two, of the plurality of power transmission antenna elements, disposed at periphery of the power transmission surface of the power transmission antenna to function as position-detection power transmission antennas, and allowing antenna elements, of the plurality of power transmission antenna elements, disposed inside the position-detection power transmission antennas on the power transmission surface to function as position-detection power reception antennas;
radiating an electromagnetic wave from the position-detection power transmission antennas to the power reception antenna;
calculating electric power of the electromagnetic wave reflected by the reflector and then received by the position-detection power reception antennas;
detecting a positional relation between the power transmission antenna and the power reception antenna based on the calculated electric power; and
correcting a relative position between the power transmission antenna and the power reception antenna based on the detected positional relation.
1 Assignment
0 Petitions
Accused Products
Abstract
In a method and system for wireless power supply, the misalignment between the power transmission antenna and the power reception antenna is detected based on the electric power of an electromagnetic wave radiated from the position-detection power transmission antennas of the power transmission antenna, reflected by a reflector provided outside the power reception surface of the power reception antenna, and detected by the position-detection power reception antennas of the power transmission antenna.
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Citations
10 Claims
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1. A method for wireless power supply in which power is supplied wirelessly from a power transmission antenna to a power reception antenna, the power transmission antenna including a plurality of power transmission antenna elements, and the power reception antenna including a plurality of power reception antenna elements
wherein a power transmission surface of the power transmission antenna and a power reception surface of the power reception antenna are parallel and opposite to each other, and a reflector is provided outside the power reception surface and inwardly inclined at a predetermined angle with respect to the power reception surface, wherein the method includes a misalignment correction operation prior to a wireless power supply operation, and during the misalignment correction operation, the method comprises: -
allowing at least two, of the plurality of power transmission antenna elements, disposed at periphery of the power transmission surface of the power transmission antenna to function as position-detection power transmission antennas, and allowing antenna elements, of the plurality of power transmission antenna elements, disposed inside the position-detection power transmission antennas on the power transmission surface to function as position-detection power reception antennas; radiating an electromagnetic wave from the position-detection power transmission antennas to the power reception antenna; calculating electric power of the electromagnetic wave reflected by the reflector and then received by the position-detection power reception antennas; detecting a positional relation between the power transmission antenna and the power reception antenna based on the calculated electric power; and correcting a relative position between the power transmission antenna and the power reception antenna based on the detected positional relation. - View Dependent Claims (2, 3, 4, 5)
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6. A system for wireless power supply in which power is supplied wirelessly from a power transmission apparatus to a power reception apparatus,
wherein the power transmission apparatus includes: -
a microwave generator configured to generate an electromagnetic wave; a control unit configured to control the microwave generator; and a power transmission antenna having a power transmission surface including a plurality of power transmission antenna elements, and the power reception apparatus includes; a power reception antenna having a power reception surface including a plurality of power reception antenna elements, the power reception surface being parallel and opposite to the power transmission surface; a reflector provided outside the power reception surface and having a reflective surface inclined at a predetermined angle with respect to the power reception surface so as to face inward; and a power conversion circuit configured to convert the power received by the power reception antenna into power to be supplied to a power supply object, wherein in a misalignment correction operation performed before a wireless power supply operation, at least two, of the plurality of power transmission antenna elements, disposed at periphery of the power transmission surface of the power transmission antenna function as position-detection power transmission antennas, and antenna elements, of the plurality of power transmission antenna elements, disposed inside the position-detection power transmission antennas on the power transmission surface function as position-detection power reception antennas, and the control unit is configured to detect a positional relation between the power transmission antenna and the power reception antenna based on electric power of an electromagnetic wave radiated from the position-detection power transmission antennas, reflected by the reflector, and received by the position-detection power reception antennas. - View Dependent Claims (7, 8, 9, 10)
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Specification