Transmitters and/or receivers in a wireless power transfer system predict power losses to account for presence of foreign objects.

A wireless power delivery system includes, in part, a roaming and articulating wireless power transfer device. The roaming and articulating wireless power device includes, in part, a wireless power generation unit, an energy storage unit, a controller, and...

A method of foreign object detection for a wireless power transmitter. The method includes determining a vector impedance of a near-field communication (NFC) coil with an NFC chip. The determined vector impedance includes an impedance amplitude component a...

According to some implementations, a wireless power transmitter and a wireless power receiver of a wireless power system are disclosed. According to one aspect, the wireless power transmitter includes a wireless power transmitter circuit configured to gene...

A power transmitter () comprises a driver () generating a drive signal for a transmitter coil to generate a power transfer signal during a power transfer time interval and an electromagnetic test signal during a foreign object detection time interval. A se...

An inductive power transfer system is provided, comprising a primary device, a secondary device, and a control unit, wherein the primary device is arranged and designed to inductively transfer power via a primary oscillating circuit to a secondary oscillat...

A method is provided for operating a wireless charger having a multi-switch inverter which supplies an output PWM signal to a resonant circuit in response to switching control signals, including a first set of continuous excitation phase switching control ...

A wireless power transmission device includes a transmission device and a control device. The control device generates a driving signal to the transmission device in a first soft-start period, so as to drive the transmission device. The control device sens...