Abstract: A wireless power apparatus may include a power receiver having an elongated core member with a long axis and a receiver conductor wound spirally around the elongated core member to form an elongated receiver coil, the power receiver configured to receive power from a power transmitter having a transmitter conductor being wound circularly around a center point and disposed in a plane to form a planar transmitter coil, the planar transmitter coil configured to be connected to an alternating current power source to wirelessly transmit power, the planar transmitter coil having a transmitter coil radial axis starting at the center point and defining a transmitting region from an inner edge of the planar transmitter coil to an outer edge of the planar transmitter coil along the transmitter coil radial axis.

Abstract: Structures, devices, and methods for wireless power transfer systems are described. A structure can include a plurality of strands a plurality arranged into a coil layer. For every fixed interval along a length of the structure, the plurality of strands can be folded at a lateral angle and vertically inverted in response to being folded at the lateral angle. The plurality of strands being folded can cause the plurality of strands to surround a center of the structure in a parallel path.

Abstract: Systems and methods for wireless power transfer systems are described. A controller of a device can detect an overvoltage condition associated with direct current (DC) power being outputted by a rectifier. The controller can, in response to detection of the overvoltage condition, the controller can control a phase of a current of alternating current (AC) power being received by the rectifier to cause the current and a voltage of the AC power to be out of phase.

Abstract: Systems and methods for wireless power transfer systems are described. A controller of a device can communicate with a power device by a first modulation mode. The controller can detect a failure condition between the controller and the power device. The controller can, in response to the detection of the failure condition, communicate with the power device by a second modulation mode. The first modulation mode can include capacitive modulation and the second modulation mode can include resistive modulation.

Abstract: Systems and methods for wireless power transfer systems are described. A controller of a device can communicate with a power device by a first modulation mode. The controller can detect a failure condition between the controller and the power device. The controller can, in response to the detection of the failure condition, communicate with the power device by a second modulation mode. The first modulation mode can include capacitive modulation and the second modulation mode can include resistive modulation.

Abstract: An apparatus, a method and a non-transitory computer-readable storage medium storing a program for controlling power receiving operation. The apparatus includes a controller configured to compare a frequency of an electric current generated by a voltage induced in a power receiving circuit by a magnetic field generated by a power transmitting apparatus, against a frequency threshold to determine whether the frequency is equal to or below the frequency threshold, and in response to determining that the frequency is equal to or below the frequency threshold, control a communications circuit to communicate a control command message instructing the power transmitting apparatus to modify a power charge signal used to provide the magnetic field in a manner for protecting the apparatus.

Abstract: Systems and apparatuses for wireless power transfer system are described. A receiver may send an amplitude shift key (ASK) signal to a transmitter. The transmitter may receive the ASK signal from the receiver. The transmitter may perform a demodulation on the ASK signal. The transmitter may, in response to a failure to demodulate the ASK signal, encode a notification of failure in a frequency shift key (FSK) signal. The transmitter may transmit the FSK signal to the receiver. The receiver may receive the FSK signal. The receiver may perform a function to resolve the failure to demodulate the ASK signal.

Abstract: Apparatuses including multiple selectable circuit elements are described. In an example, an apparatus may include a power supply configured to output a voltage. The apparatus may further include a controller connected to the power supply and a transmission unit connected to the controller. The transmission unit may be configured to output power. The transmission unit may include comprising an inverter connected to the power supply. The inverter may include a high-side switching element. The transmission unit may further include a circuit element a circuit connected to the power supply. The circuit may be configured to select the circuit element. The circuit may include a switch connected between the inverter and the circuit element. The switch and the high-side switching element may be configured to be driven by the voltage outputted by power supply. The controller may be configured to control the power being outputted by the transmission unit.

Abstract: Apparatuses including multiple selectable circuit elements are described. In an example, an apparatus may include a power supply configured to output a voltage. The apparatus may further include a controller connected to the power supply and a transmission unit connected to the controller. The transmission unit may be configured to output power. The transmission unit may include comprising an inverter connected to the power supply. The inverter may include a high-side switching element. The transmission unit may further include a circuit element a circuit connected to the power supply. The circuit may be configured to select the circuit element. The circuit may include a switch connected between the inverter and the circuit element. The switch and the high-side switching element may be configured to be driven by the voltage outputted by power supply. The controller may be configured to control the power being outputted by the transmission unit.

Abstract: Systems and apparatuses for wireless power transfer system are described. A receiver may send an amplitude shift key (ASK) signal to a transmitter. The transmitter may receive the ASK signal from the receiver. The transmitter may perform a demodulation on the ASK signal. The transmitter may, in response to a failure to demodulate the ASK signal, encode a notification of failure in a frequency shift key (FSK) signal. The transmitter may transmit the FSK signal to the receiver. The receiver may receive the FSK signal. The receiver may perform a function to resolve the failure to demodulate the ASK signal.

Abstract: Apparatuses including multiple selectable circuit elements are described. In an example, an apparatus may include a power supply configured to output a voltage. The apparatus may further include a controller connected to the power supply and a transmission unit connected to the controller. The transmission unit may be configured to output power. The transmission unit may include comprising an inverter connected to the power supply. The inverter may include a high-side switching element. The transmission unit may further include a circuit element a circuit connected to the power supply. The circuit may be configured to select the circuit element. The circuit may include a switch connected between the inverter and the circuit element. The switch and the high-side switching element may be configured to be driven by the voltage outputted by power supply. The controller may be configured to control the power being outputted by the transmission unit.

Abstract: An apparatus, a method and a non-transitory computer-readable storage medium storing a program for controlling power receiving operation. The apparatus includes a controller configured to compare a frequency of an electric current generated by a voltage induced in a power receiving circuit by a magnetic field generated by a power transmitting apparatus, against a frequency threshold to determine whether the frequency is equal to or below the frequency threshold, and in response to determining that the frequency is equal to or below the frequency threshold, control a communications circuit to communicate a control command message instructing the power transmitting apparatus to modify a power charge signal used to provide the magnetic field in a manner for protecting the apparatus.