Koninklijke Philips has been granted a patent for a wireless power transmitter that includes a driver, transmitter coil, test coil, and foreign object detector. The system generates power transfer and electromagnetic test signals, enabling foreign object detection and adaptation through varying test drive signals during designated intervals. GlobalData’s report on Koninklijke Philips gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Koninklijke Philips, Treatment progress monitoring was a key innovation area identified from patents. Koninklijke Philips's grant share as of June 2024 was 58%. Grant share is based on the ratio of number of grants to total number of patents.
Wireless power transmitter with foreign object detection capabilities
The patent US12046921B2 describes a power transmitter designed for wireless power transfer systems, incorporating advanced features for both power transmission and foreign object detection. The transmitter includes a transmitter coil that generates a power transfer signal, driven by a driver that operates during designated power transfer and foreign object detection time intervals within a repeating time frame. A test coil generates an electromagnetic test signal, while a test generator produces a test drive signal during the foreign object detection intervals. The system also features an adapter circuit that controls the test generator to vary the test drive signal's properties, such as frequency and voltage, and a memory circuit to store the resulting parameter values. This configuration allows for effective foreign object detection by measuring parameters during the detection intervals.
Additionally, the patent outlines methods for operating the power transmitter and receiver, emphasizing the interaction between the two components. The receiver can send messages to the transmitter, influencing the determination of test drive signal parameters based on operational criteria. The adapter circuit can also measure signal properties and adjust the test drive signal accordingly, enhancing the system's adaptability. Notably, the design allows for a single coil to serve both as the transmitter and test coil, streamlining the system's architecture. Overall, the patent presents a comprehensive approach to improving the efficiency and safety of wireless power transfer through innovative signal management and detection techniques.
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