A method and apparatus are provided for determining, by a wireless power transmitter, whether a wireless power receiver is removed from a wireless power network managed by the wireless power transmitter. The method includes transmitting a command signal to report power information of the wireless power receiver at stated periods; determining whether a report signal corresponding to the command signal is received from the wireless power receiver; and determining that the wireless power receiver is removed from the wireless power network, if the report signal is not received after transmitting the command signal a predetermined number of times at the stated periods.

A method and apparatus are provided for controlling wireless power in a wireless power network managed by a wireless power transmitter. The control method includes registering a wireless power receiver to a wireless power network corresponding to the wireless power transmitter; applying a charging power for charging the wireless power receiver to a resonator of the wireless power transmitter; detecting a change of magnitude of power applied to the resonator; detecting that a communication unit of the wireless power transmitter fails to receive a communication signal from the wireless power receiver a predetermined time; and in response to detecting the change of the magnitude of power applied to the resonator and that the communication unit fails to receive the communication signal from the wireless power receiver in the predetermined time, removing the wireless power receiver from the wireless power network.

A power transmitting apparatus that transmits power to a power receiving apparatus executes intermittent wireless transmission of power. The power transmitting apparatus operates according to one of a first power transmitting method including detecting a signal load-modulated by the power receiving apparatus using an ID in response to the transmitted power during the intermittent transmission and a second power transmitting method including transmitting the power having modulated the power according to an ID determined in advance so that the power receiving apparatus detects the ID determined in advance.

An apparatus and a method for charge control are provided. The apparatus for charge control may include an integrated direct current-to-direct current (DC/DC) converter configured to step up an output voltage level of a load to be greater than or equal to a supply voltage level set in a power amplifier, and the power amplifier configured to convert a direct current (DC) voltage stepped up by the integrated DC/DC converter into an alternating current (AC) voltage based on a resonant frequency, and to amplify the converted AC voltage. The apparatus for charge control may include a rectification unit configured to convert an AC power received wirelessly into a DC power; and a DC/DC converter configured to step down a voltage level of the DC power to a voltage level required by a load in the receiving mode.

According to the embodiments provided herein, power and data transfer system may include a primary inductive, a secondary inductive coupler, a power source, and a controller. The primary inductive coupler may forms a flat front face. The primary inductive coupler may include a primary winding wound around a primary core. The primary core may be adjacent to the flat front face. The secondary inductive coupler may be separated from the flat front face of the primary inductive coupler by a fluid. The secondary inductive coupler may include a secondary winding. The power source may generate a current in the primary winding of the primary inductive coupler and a magnetic field in the secondary winding of the secondary inductive coupler. The controller may execute machine readable instructions to receive charging data via a feedback loop and adjust the current based upon the charging data.

According to the embodiments provided herein, power and data transfer system may include a primary inductive, a secondary inductive coupler, a power source, and a controller. The primary inductive coupler may forms a flat front face. The primary inductive coupler may include a primary winding wound around a primary core. The primary core may be adjacent to the flat front face. The secondary inductive coupler may be separated from the flat front face of the primary inductive coupler by a fluid. The secondary inductive coupler may include a secondary winding. The power source may generate a current in the primary winding of the primary inductive coupler and a magnetic field in the secondary winding of the secondary inductive coupler. The controller may execute machine readable instructions to receive charging data via a feedback loop and adjust the current based upon the charging data.

Provided is a wireless power supply control system including a control apparatus controlling driving of one or more driving devices in accordance with a plurality of predetermined driving patterns, a first radio having a directional antenna, and a second radio driven by power supply radio waves transmitted from the first radio. Target driving directivity information corresponding to a target driving pattern acquired by an acquisition unit is selected from among pieces of driving directivity information relating to a directivity applied to the directional antenna, in a state in which driving of the driving devices is controlled by the control apparatus in accordance with the driving patterns, the selected target driving directivity information is applied to the directional antenna of the first radio, and wireless power supply from the first radio to the second radio is executed.

Provided is a wireless power supply control system including a control apparatus controlling driving of one or more driving devices in accordance with a plurality of predetermined driving patterns, a first radio having a directional antenna, and a second radio driven by power supply radio waves transmitted from the first radio. Target driving directivity information corresponding to a target driving pattern acquired by an acquisition unit is selected from among pieces of driving directivity information relating to a directivity applied to the directional antenna, in a state in which driving of the driving devices is controlled by the control apparatus in accordance with the driving patterns, the selected target driving directivity information is applied to the directional antenna of the first radio, and wireless power supply from the first radio to the second radio is executed.

An apparatus and method for transmission of wireless power to a plurality of chargeable devices. The apparatus and method include and provide for a wireless power transmitter including a power transmitting element configured to use a current at a first level to wirelessly transmit power sufficient to provide power to one or more chargeable devices positioned within a charging region. The apparatus and method further include and provide for a controller to detect a subsequent chargeable device positioned within the charging region and to adjust the current from the first level to a default level prior to communication with the subsequent chargeable device.

A magnetic alignment system can include a primary annular magnetic alignment component and a secondary annular magnetic alignment component. The primary alignment component can include an inner annular region having a first magnetic orientation, an outer annular region having a second magnetic orientation opposite to the first magnetic orientation, and a non-magnetized central annular region disposed between the primary inner annular region and the primary outer annular region. The secondary alignment component can have a magnetic orientation with a radial component.