Abstract: A wireless power transfer system is disclosed. The system includes a wireless power transmitter including a transmitter coil and a transmitter electric field shield disposed over the transmitter coil. The transmitter electric field shield includes a first printed circuit board (PCB) and a second PCB. Each of the first and second PCBs includes a number of apertures. The apertures of the first PCB do not overlap with the apertures of the second PCB. The system further includes a wireless power receiver including a receiver coil and a receiver electric field shield disposed over or underneath the receiver coil. The receiver electric field shield includes a PCB having a first layer and a second layer connected to one another. The first layer of the PCB mates with the receiver coil and the second layer of the PCB mates with an interface surface of the wireless power receiver.

Abstract: A wireless charging device includes a driver unit configured to generate one of a first AC voltage signal having a first frequency and a second AC voltage signal having a second frequency. Also, the wireless charging device includes a transmitting unit having a first coil and a first capacitor and configured to transmit the first AC voltage signal. Further, the transmitting unit includes a second coil and a second capacitor and configured to transmit the second AC voltage signal. Additionally, the wireless charging device includes a control unit configured to detect a first receiver device operating at the first frequency based on a change in a first voltage in the transmitting unit, and detect a second receiver device operating at the second frequency based on a change in a second voltage in the transmitting unit.

Abstract: Systems, methods, and devices are described to improve wireless charging devices. Systems include a power inverter configured to generate a power transfer signal based, at least in part, on a plurality of transmission parameters, a transmission element configured to wirelessly transmit the power transfer signal, and a controller configured to determine a power transfer mode used by the power inverter based, at least in part, on a plurality of operational parameters and a plurality of configuration parameters.

Abstract: A transmitting assembly (114, 214, 334) configured to transmit electric power in a universal wireless charging device (102, 200, 302) is presented. The transmitting assembly (114, 214, 334) includes a first coil (116, 216, 316) embedded in a printed circuit board (220) and configured to transmit a first AC voltage signal having a first frequency. Also, the transmitting assembly (114, 214, 334) includes a second coil (118, 218, 318) disposed on the printed circuit board (220) and configured to transmit a second AC voltage signal having a second frequency, wherein the second frequency is different from the first frequency, and wherein the first AC voltage signal having the first frequency and the second AC voltage signal having the second frequency are used to wirelessly charge a plurality of receiver devices (104, 106) having different frequency standards.

Abstract: A transmitting assembly (114, 214, 334) configured to transmit electric power in a universal wireless charging device (102, 200, 302) is presented. The transmitting assembly (114, 214, 334) includes a first coil (116, 216, 316) embedded in a printed circuit board (220) and configured to transmit a first AC voltage signal having a first frequency. Also, the transmitting assembly (114, 214, 334) includes a second coil (118, 218, 318) disposed on the printed circuit board (220) and configured to transmit a second AC voltage signal having a second frequency, wherein the second frequency is different from the first frequency, and wherein the first AC voltage signal having the first frequency and the second AC voltage signal having the second frequency are used to wirelessly charge a plurality of receiver devices (104, 106) having different frequency standards.

Abstract: A wireless charging device includes a driver unit configured to generate one of a first AC voltage signal having a first frequency and a second AC voltage signal having a second frequency. Also, the wireless charging device includes a transmitting unit having a first coil and a first capacitor and configured to transmit the first AC voltage signal. Further, the transmitting unit includes a second coil and a second capacitor and configured to transmit the second AC voltage signal. Additionally, the wireless charging device includes a control unit configured to detect a first receiver device operating at the first frequency based on a change in a first voltage in the transmitting unit, and detect a second receiver device operating at the second frequency based on a change in a second voltage in the transmitting unit.

Abstract: A wireless charging device includes a driver unit configured to generate one of a first AC voltage signal having a first frequency and a second AC voltage signal having a second frequency. Also, the wireless charging device includes a transmitting unit having a first coil and a first capacitor and configured to transmit the first AC voltage signal. Further, the transmitting unit includes a second coil and a second capacitor and configured to transmit the second AC voltage signal. Additionally, the wireless charging device includes a control unit configured to detect a first receiver device operating at the first frequency based on a change in a first voltage in the transmitting unit, and detect a second receiver device operating at the second frequency based on a change in a second voltage in the transmitting unit.

Abstract: A wireless charging device includes a driver unit configured to generate one of a first AC voltage signal having a first frequency and a second AC voltage signal having a second frequency. Also, the wireless charging device includes a transmitting unit having a first coil and a first capacitor and configured to transmit the first AC voltage signal. Further, the transmitting unit includes a second coil and a second capacitor and configured to transmit the second AC voltage signal. Additionally, the wireless charging device includes a control unit configured to detect a first receiver device operating at the first frequency based on a change in a first voltage in the transmitting unit, and detect a second receiver device operating at the second frequency based on a change in a second voltage in the transmitting unit.

Abstract: A wireless charging device includes a driver unit configured to generate one of a first AC voltage signal having a first frequency and a second AC voltage signal having a second frequency. Also, the wireless charging device includes a transmitting unit having a first coil and a first capacitor and configured to transmit the first AC voltage signal. Further, the transmitting unit includes a second coil and a second capacitor and configured to transmit the second AC voltage signal. Additionally, the wireless charging device includes a control unit configured to detect a first receiver device operating at the first frequency based on a change in a first voltage in the transmitting unit, and detect a second receiver device operating at the second frequency based on a change in a second voltage in the transmitting unit.

Abstract: A calibration device includes a controller configured to communicate a plurality of input voltage signals having different determined frequencies to a first power exchange coil. Also, the calibration device includes a load unit coupled to a second power exchange coil, where the load unit includes at least a first electrical load and a second electrical load. Further, the calibration device includes a voltage sensor configured to measure a plurality of first output voltage signals across the first electrical load and a plurality of second output voltage signals across the second electrical load, and where the controller is configured to determine an optimal operating frequency of a wireless power transfer system based on the plurality of input voltage signals, the plurality of first output voltage signals, and the plurality of second output voltage signals.

Abstract: A power transfer device and an associated method thereof are disclosed. The power transfer device includes a driver unit having a plurality of converters. The driver unit includes a plurality of legs forming ones of the plurality of converters, such that at least one leg of a first converter of the plurality of converters is common to a second converter of the plurality of converters. Each converter of the plurality of converters includes an output terminal. The driver unit may include a plurality of transmitter coils. In some implementations, a different transmitter coil is coupled to each output terminal of a respective converter.

Abstract: A power transfer device (102) is disclosed. The power transfer device (102) includes a driver unit (108). The driver unit (108) includes a plurality of converters (112, 114, 116, 117) including a plurality of legs (118, 120, 122, 124, 125) coupled to each other, where at least one leg of each of the plurality of converters (112, 114, 116, 117) is common to another power converter of the plurality of converters (112, 114, 116, 117), and where each of the plurality of converters (112, 114, 116, 117) includes an output terminal (204, 206, 208, 210, 304, 406, 408). Further, the driver unit (108) includes at least one transmitter coil (110a, 110b, 110c, 110d), where the at least one transmitter coil (110a, 110b, 110c, 110d) is coupled to the corresponding output terminal (204, 206, 208, 210, 304, 406, 408).

Abstract: A transmitting assembly (114, 214, 334) configured to transmit electric power in a universal wireless charging device (102, 200, 302) is presented. The transmitting assembly (114, 214, 334) includes a first coil (116, 216, 316) embedded in a printed circuit board (220) and configured to transmit a first AC voltage signal having a first frequency. Also, the transmitting assembly (114, 214, 334) includes a second coil (118, 218, 318) disposed on the printed circuit board (220) and configured to transmit a second AC voltage signal having a second frequency, wherein the second frequency is different from the first frequency, and wherein the first AC voltage signal having the first frequency and the second AC voltage signal having the second frequency are used to wirelessly charge a plurality of receiver devices (104, 106) having different frequency standards.

Abstract: A wireless charging device (102) includes a driver unit (110) configured to generate one of a first AC voltage signal having a first frequency and a second AC voltage signal having a second frequency. Also, the wireless charging device (102) includes a transmitting unit (114) having a first coil (130) and a first capacitor (132) and configured to transmit the first AC voltage signal. Further, the transmitting unit (114) includes a second coil (134) and a second capacitor (136) and configured to transmit the second AC voltage signal. Additionally, the wireless charging device (102) includes a control unit (112) configured to detect a first receiver device (104) operating at the first frequency based on a change in a first voltage in the transmitting unit (114), and detect a second receiver device (106) operating at the second frequency based on a change in a second voltage in the transmitting unit (114).

Abstract: A calibration device includes a controller configured to communicate a plurality of input voltage signals having different determined frequencies to a first power exchange coil. Also, the calibration device includes a load unit coupled to a second power exchange coil, where the load unit includes at least a first electrical load and a second electrical load. Further, the calibration device includes a voltage sensor configured to measure a plurality of first output voltage signals across the first electrical load and a plurality of second output voltage signals across the second electrical load, and where the controller is configured to determine an optimal operating frequency of a wireless power transfer system based on the plurality of input voltage signals, the plurality of first output voltage signals, and the plurality of second output voltage signals.

Abstract: A contactless power transfer system is provided. The contactless power transfer system includes a first power exchanging coil configured to exchange power, a power mating coil operatively coupled to a switching unit, and a controller operatively coupled to the switching unit. The controller is configured to control switching operations of the switching unit to actively control a current in the power mating coil to match an impedance of the first power exchanging coil and enable the exchange of power.

Abstract: A contactless power transfer system is provided. The contactless power transfer system includes a first power exchanging coil configured to exchange power, a power mating coil operatively coupled to a switching unit, and a controller operatively coupled to the switching unit. The controller is configured to control switching operations of the switching unit to actively control a current in the power mating coil to match an impedance of the first power exchanging coil and enable the exchange of power.