WIRELESS POWER TRANSFER FOR APPLIANCES AND EQUIPMENTS
First Claim
1. An apparatus for wirelessly transferring power to a receive antenna of a receiver device, comprising:
- a transmit antenna configured to generate an electromagnetic field to wirelessly transfer the power to the receive antenna within a coverage area of the transmit antenna;
an amplifier configured to output electric power to the transmit antenna for generating the electromagnetic field;
a presence detector configured to detect a presence of the receiver device within the coverage area and configured to generate a presence signal in response to the detection of the presence of the receiver device; and
a controller operably coupled to the presence detector and configured to reduce a power output of at least one of the transmit antenna and the amplifier following a time delay after the presence signal indicates the absence of any receiver devices in the coverage area.
1 Assignment
0 Petitions
Accused Products
Abstract
Exemplary embodiments are directed to wireless power transfer. A transmitting device or a receiving device for use in a wireless transfer system may be equipment or a household appliance. The transmitting device includes a transmit antenna to wirelessly transfer power to a receive antenna by generating a near field radiation within a coupling-mode region. An amplifier applies an RF signal to the transmit antenna. A presence detector detects a presence of a receiver device within the coupling-mode region. A controller adjusts a power output of the amplifier responsive to the presence of a receiver device. The presence detector may also detect a human presence. The power output may be adjusted at or below the regulatory level when the presence signal indicates human presence and above a regulatory level when the presence signal indicates human absence.
80 Citations
20 Claims
-
1. An apparatus for wirelessly transferring power to a receive antenna of a receiver device, comprising:
-
a transmit antenna configured to generate an electromagnetic field to wirelessly transfer the power to the receive antenna within a coverage area of the transmit antenna; an amplifier configured to output electric power to the transmit antenna for generating the electromagnetic field; a presence detector configured to detect a presence of the receiver device within the coverage area and configured to generate a presence signal in response to the detection of the presence of the receiver device; and a controller operably coupled to the presence detector and configured to reduce a power output of at least one of the transmit antenna and the amplifier following a time delay after the presence signal indicates the absence of any receiver devices in the coverage area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method, comprising:
-
generating, at a transmit antenna, an electromagnetic field to wirelessly transfer power from the transmit antenna to a receive antenna of a receiver device in a coverage area of the transmit antenna; outputting, at an amplifier, electric power to the transmit antenna for generating the electromagnetic field; detecting a presence of the receiver device within the coverage area and generating a presence signal in response to the detection of the presence of the receiver device; and reducing a power output of at least one of the transmit antenna and the amplifier following a time delay after the presence signal indicates the absence of any receiver devices in the coverage area. - View Dependent Claims (12, 13, 14, 15)
-
-
16. A wireless power transfer system, comprising:
-
means for generating an electromagnetic field to wirelessly transfer power to a receive antenna of a receiver device in a coverage area of the generating means; means for outputting electric power to the transmit antenna for generating the electromagnetic field; means for detecting a presence of the receiver device within the coverage area and generating a presence signal in response to the detection of the presence of the receiver device; and means for reducing a power output of at least one of the generating means and the outputting means following a time delay after the presence signal indicates the absence of any receiver devices in the coverage area. - View Dependent Claims (17, 18, 19, 20)
-
Specification