A power feed system includes a computer that evaluates benefit obtained when a power feed mat is placed, for each of a plurality of locations within a subject region where the power feed mat can be placed, the power feed mat being configured to wirelessly feed power to a movable body. In a power feed method using such a computer, a display shows a result of evaluation of the benefit for each location within the subject region evaluated by the computer.

The invention refers to a plug-in module for charging of batteries in an electronic device, comprising a pad-element configured to receive wireless input of electromagnetic energy; a chassis connected with the pad-element and provided with a plug connector which is configured to be plugged in a charging socket of the electronic device wherein the chassis comprises integrated energy transmission channels and a circuit board configured to transfer and convert the electromagnetic energy from the pad-element into a charging current provided at the plug connector.

Systems, methods and apparatus for wireless charging are disclosed. A wireless charging device has a plurality of charging cells provided on a first surface and a processor configured to provide a charging current to a first charging coil in a surface of the wireless charging device, determine that an impedance of a resonant circuit has varied from a threshold or setpoint impedance, and restore the threshold or setpoint impedance by modifying frequency of the charging current. The resonant circuit may include the first charging coil. A method for operating the wireless charging device includes providing a charging current to a first charging coil in a surface of the wireless charging device, determining that an impedance of a resonant circuit has varied from a threshold or setpoint impedance, and restoring the threshold or setpoint impedance by modifying frequency of the charging current. The resonant circuit may include the charging coil.

Systems, methods and apparatus for wireless charging are disclosed. A charging device has a resonant circuit that includes a transmitting coil. The charging device also has a driver circuit configured to power the resonant circuit, a pulse width modulator and a controller configured to provide a control signal to the pulse width modulator the control signal configuring the pulse width to provide a modulated drive signal to the driver circuit. The pulse width modulator is configured to provide the modulated drive signal to the resonant circuit. The resonant circuit is configured to operate as a low-pass filter that blocks frequency components of the modulated drive signal that correspond to the reference signal. The driver circuit is configured to use the modulated drive signal to produce a charging current in the resonant circuit. The charging current causes power to be wirelessly transferred to a receiving device through the transmitting coil.

A disclosed wireless power transmitting apparatus comprises: a plate; a transmitting coil that transmits wireless power to a cooking device disposed on the plate; a driving circuit that applies a current to the transmitting coil; a communication module that communicates with the cooking device; and a control unit that controls the driving circuit such that the wireless power is periodically transmitted on the basis of a transmission period of the wireless power determined by discharge characteristics of the cooking device when the cooking device enters a standby mode.

An electronic device includes a plurality of coils, power conversion circuits, demodulation switches, and a processor. The power conversion circuits convert DC power into AC power, and output the AC power to the plurality of coils, respectively. The demodulation switches selectively connect the plurality of coils to ground. The processor selects at least one coil from among the plurality of coils, and controls an on/off state of the demodulation switches to connect or disconnect at least one remaining coil except for the selected at least one coil among the plurality of coils to the ground. The processor controls the power conversion circuits to output the AC power to the selected at least one coil and demodulates a signal of the selected at least one coil to identify information from an external electronic device disposed adjacent to a selected at least one coil based on the demodulation.

A system is provided herein. The system includes modules of an electric vehicle and a power receiver of the electric vehicle. The power receiver includes receiving coils and a controller. Each of the receiving coils directly and separately connects to a separate one of the modules. The controller monitors currents to and from each of the modules and modifies operation points of each of the modules by changing frequency or duty cycle to achieve a target current.

A wireless charging method includes: acquiring a charging type supported by a wireless charging device after handshake communication with the wireless charging device; and selecting a first receiving assembly and/or a second receiving assembly to charge batteries of a foldable-screen electronic device based on the charging type. By arranging the first receiving assembly and the second receiving assembly on the foldable-screen electronic device, at least one of the receiving assemblies can be selected for wireless charging the batteries of the electronic device when one side surface of the foldable-screen electronic device is proximal to the wireless charging device, thereby improving charging efficiency and shortening charging time. User experience can be improved as the users do not need to select a specified side surface for charging.

Disclosed herein are a number of embodiments for wireless and non-conductive transfers of power and data to electronic devices. These technological advances can be implemented in retail security products (e.g., merchandising display positions for devices such as smart phones, tablet computers, wearables (e.g., smart watches), digital cameras, etc.) as well as docking systems for tablet computers.

Various methods and systems are provided for wirelessly charging a digital x-ray detector of an x-ray imaging system in at least two orientations. In one example, a method comprises: detecting a digital x-ray detector in a charging area of an x-ray system, the charging area including a first power source; pairing the digital x-ray detector to the x-ray system via a wireless connection with the x-ray system; and wirelessly charging the digital x-ray detector via the first power source.