Wireless charging system with adaptive radio frequency interference
AssigneeIntel Corporation
InventorsJie Gao, Songnan Yang, Xintian Lin, Ulun Karacaoglu, Bin Xiao
Life of this patent
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Abstract
The disclosure generally relates to a method and apparatus for wireless charging station with adaptive radio interference detection and control. During wireless charging of a smart device, the harmonics associated with the magnetic resonance coupling between the power transmission unit (PTU) and the power receiving unit (PRU) may interfere with radio communication if PRU engages in radio messaging. The disclosed embodiments provide method and system for identifying interference and adapting the wireless charging power to reduce or eliminate interference while efficiently charging the PRU.
Claims32
A system to reduce radio frequency interference (RFI) between magnetic field generated by a wireless charger and signals of a wireless platform, the system comprising:
- a controller configured to determine if an RFI value exceeds a predetermined threshold, the RFI value determined as a function of interference due to wireless charger magnetic field (Nc) and interference due to the platform background noise (N);
- a driver in communication with the controller, the driver configured to receive instructions from the controller to change at least one of power, frequency harmonics or slew rate of the magnetic field when the RFI value exceeds the predetermined threshold.
A wireless communication device, comprising:
- at least one communication platform for transmitting a communication signal;
- a controller in communication with the communication platform, the controller configured to:
- receive indication of radio frequency interference (RF) between the communication signal and a wireless charge driving signal;
- determine whether the RFI exceeds a predetermined threshold;
- if RFI exceeds the predetermined threshold, direct the communication platform to request change in at least one of power, frequency harmonics or slew rate of the magnetic field generated by a wireless charging station.
A method for adaptive wireless charging, the method comprising:
- detecting simultaneous radio communication and magnetic charging of a wireless communication device, the magnetic charging of the wireless communication device driven by a magnetic charging signal;
- measuring a first Radio Frequency Interference (RFI) value between the radio communication and the magnetic charging;
- determining whether the first RFI value exceeds a predetermined threshold;
- if exceeding the predetermined threshold, changing at least one of power, frequency harmonics or slew rate of the magnetic charging signal.
A computer-readable non-transitory storage medium that contains instructions, which when executed by one or more processors result in performing operations comprising:
- detecting simultaneous radio communication and magnetic charging of a wireless communication device, the magnetic charging of the wireless communication device driven by a magnetic charging signal;
- measuring a first Radio Frequency Interference (RFI) value between the radio communication and the magnetic charging;
- determining whether the first RFI value exceeds a predetermined threshold;
- if exceeding the predetermined threshold, changing at least one of power, frequency harmonics or slew rate of the magnetic charging signal.
Dependencies are inferred from the claim text.