WIRELESS POWER TRANSFER SYSTEM, TRANSMISSION DEVICE, AND CONTROLLING METHOD OF WIRELESS POWER TRANSFER SYSTEM
First Claim
1. A wireless power transfer system comprising:
- a power receiving device that receives transmission by wireless power transfer;
a transmission device that has a transmission element that transmits transmission power to the power receiving device, the transmission device having a control mechanism that controls an oriented direction of the transmission element;
a positioning device that is connected communicably with the transmission device, the positioning device receiving with a plurality of antennas arranged adjacent to each other a positioning signal that is a wireless signal transmitted from the power receiving device, the positioning device having a positioning function that calculates a direction α
in which the power receiving device exists when seen from the positioning device itself and a position of the power receiving device, based on a phase difference between the received positioning signals, whereinthe transmission deviceacquires from the positioning device a direction α
in which the power receiving device exists, controls the control mechanism so that the oriented direction of the transmission element faces the direction of the power receiving device based on the acquired direction α
, and starts transmission, andacquires a distance between the transmission device itself and the power receiving device based on the position of the power receiving device acquired from the positioning device, and obtains a permissible range of transmission efficiency at the time of transmitting the transmission power to the power receiving device, which corresponds to the acquired distance,the power receiving device transmits to the transmission device a power value that is currently being supplied from the transmission device,the transmission devicereceives the power value sent from the power receiving device,obtains a current transmission efficiency, based on the received power value and a power value of the transmission power currently being transmitted from the transmission element, andin the case that the current transmission efficiency deviates from the permissible range, acquires again from the positioning device a direction α
in which the power receiving device exists, and based on the acquired direction α
, controls the oriented direction of the transmission element so that the oriented direction of the transmission element faces the direction of the power receiving device.
1 Assignment
0 Petitions
Accused Products
Abstract
A wireless power transfer system includes a power receiving device that receives transmission by wireless power transfer, a transmission device that has a transmission element that transmits transmission power to the power receiving device, the transmission device having a control mechanism that controls an oriented direction of the transmission element, and a positioning device that is connected communicably with the transmission device, the positioning device receiving with a plurality of antennas arranged adjacent to each other a positioning signal that is a wireless signal transmitted from the power receiving device, the positioning device having a positioning function that calculates a direction α in which the power receiving device exists when seen from the positioning device itself and a position of the power receiving device, based on a phase difference between the received positioning signals.
-
Citations
9 Claims
-
1. A wireless power transfer system comprising:
-
a power receiving device that receives transmission by wireless power transfer; a transmission device that has a transmission element that transmits transmission power to the power receiving device, the transmission device having a control mechanism that controls an oriented direction of the transmission element; a positioning device that is connected communicably with the transmission device, the positioning device receiving with a plurality of antennas arranged adjacent to each other a positioning signal that is a wireless signal transmitted from the power receiving device, the positioning device having a positioning function that calculates a direction α
in which the power receiving device exists when seen from the positioning device itself and a position of the power receiving device, based on a phase difference between the received positioning signals, whereinthe transmission device acquires from the positioning device a direction α
in which the power receiving device exists, controls the control mechanism so that the oriented direction of the transmission element faces the direction of the power receiving device based on the acquired direction α
, and starts transmission, andacquires a distance between the transmission device itself and the power receiving device based on the position of the power receiving device acquired from the positioning device, and obtains a permissible range of transmission efficiency at the time of transmitting the transmission power to the power receiving device, which corresponds to the acquired distance, the power receiving device transmits to the transmission device a power value that is currently being supplied from the transmission device, the transmission device receives the power value sent from the power receiving device, obtains a current transmission efficiency, based on the received power value and a power value of the transmission power currently being transmitted from the transmission element, and in the case that the current transmission efficiency deviates from the permissible range, acquires again from the positioning device a direction α
in which the power receiving device exists, and based on the acquired direction α
, controls the oriented direction of the transmission element so that the oriented direction of the transmission element faces the direction of the power receiving device. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A controlling method of a wireless power transfer system, the wireless power transfer system including
a power receiving device that receives transmission by wireless power transfer, a transmission device that has a transmission element that transmits transmission power to the power receiving device, the transmission device having a control mechanism that controls an oriented direction of the transmission element, a positioning device that is connected communicably with the transmission device, the positioning device receiving with a plurality of antennas arranged adjacent to each other a positioning signal that is a wireless signal to be transmitted from the power receiving device, the positioning device having a positioning function that calculates a direction α - in which the power receiving device exists when seen from the positioning device itself and a position of the power receiving device, based on a phase difference between the received positioning signals,
wherein the transmission device acquires from the positioning device a direction α
in which the power receiving device exists, controls the control mechanism so that the oriented direction of the transmission element faces the direction of the power receiving device based on the acquired direction α
, and starts transmission, andacquires a distance between the transmission device itself and the power receiving device based on the position of the power receiving device acquired from the positioning device, and obtains a permissible range of transmission efficiency at the time of transmitting the transmission power to the power receiving device, which corresponds to the acquired distance, the power receiving device transmits to the transmission device a power value that is currently being supplied from the transmission device, the transmission device receives the power value sent from the power receiving device, obtains a current transmission efficiency, based on the received power value and a power value of the transmission power currently being transmitted from the transmission element, and in the case that the current transmission efficiency deviates from the permissible range, the transmission device acquires again from the positioning device a direction α
in which the power receiving device exists, and based on the acquired direction α
, controls the oriented direction of the transmission element so that the oriented direction of the transmission element faces the direction of the power receiving device. - View Dependent Claims (9)
- in which the power receiving device exists when seen from the positioning device itself and a position of the power receiving device, based on a phase difference between the received positioning signals,
Specification