Apple Inc.

Ron Rafer Floresca

Saining Ren

Arunim Kumar

Bharat K Patel

Liang Chen

Daniel James Robertson

Ali Abdolkhani

Antoin J Russell

Lawrence Bernardo Dela Cruz

Zachary Strachan Harris

Junbo Zeng

Jerald Polestico Guillermo

Michael Scott Eckert

Andrew Gray

Michael Nasa

Daniel Lorenz Huber

Selestino Langi Rodan

Eugenio Jr Sia Lecias

An inductive power receiver including a switch mode regulator to control the power flow from a power receiving coil and a modulator to communicate to an inductive power transmitter via the power receiving coil. The switch mode regulator operates in a different modes during transmitting and non-transmitting periods.

Inductive power receiver

A wireless power transmitting device transmits wireless power signals to a wireless power receiving device using an output circuit that includes a wireless power transmitting coil. Measurement circuitry is coupled to the output circuit to help determine whether the wireless power receiving device is present and ready to accept transmission of wireless power. Oscillator circuitry for supplying signals to the output circuitry while making measurements with the measurement circuitry is coupled to the output circuit using an impedance injection network. The impedance injection network includes an inductor and a resistor coupled in series. Control circuitry opens a transistor in the output circuit when making measurements with the measurement circuitry and closes the transistor when transmitting the wireless power signals.

Wireless charging system having measurement circuitry with foreign object detection capabilities

An inductive power receiving device configured to: supply power received with a power receiving coil to a load in a first mode; determine whether a converter voltage exceeds a threshold voltage; in response to the determining the converter voltage exceeds the threshold voltage after sending a charging mode request, switch to supplying power received with the power receiving coil to the load in a second mode; and in response to determining the converter voltage coil exceeds the threshold voltage before sending the charging mode request is sent, prevent at least a portion of the power received with the power receiving coil from reaching the load. An inductive power transmitting device configured to provide an alternating current voltage to a power transmitting coil and gradually increase the voltage after receiving a charging mode request and stop gradually increasing the voltage once an inductive power receiving device changes modes.

Inductive power transfer system

An inductive power transfer device including: a resonant circuit, having a power transfer coil and a power transfer capacitor; a coupling coil, magnetically-coupled to the power transfer coil; a variable impedance; and a controller configured to determine the impedance value of the variable impedance based on predetermined criteria including: substantially regulating power provided to a load; tuning the resonant circuit resonant frequency substantially to a predetermined frequency; adjusting a frequency of a magnetic field associated with the power transfer coil; and/or adjusting an impedance reflected by the power transfer coil to a corresponding coupled power transfer coil.

Coupled-coil power control for inductive power transfer systems

Growing community of inventors

Auckland, New Zealand

Ron Rafer Floresca