US 12,438,402 B2
Foreign object detection in a wireless power transfer system
Viswanathan Kanakasabai, Bangalore (IN); Jayanti Ganesh, Bangalore (IN); and Subbarao Tatikonda, Bangalore (IN)
Assigned to GE Intellectual Property Licensing, LLC, Niskayuna, NY (US)
Appl. No. 18/713,789
Filed by GE Intellectual Property Licensing, LLC, Niskayuna, NY (US)
PCT Filed Jan. 25, 2023, PCT No. PCT/US2023/061227
§ 371(c)(1), (2) Date May 28, 2024,
PCT Pub. No. WO2023/147335, PCT Pub. Date Aug. 3, 2023.
Claims priority of application No. 202211004861 (IN), filed on Jan. 28, 2022.
Prior Publication US 2025/0030275 A1, Jan. 23, 2025
Int. Cl. H02J 50/60 (2016.01); H02J 50/40 (2016.01); H02J 50/80 (2016.01); H02J 50/12 (2016.01)
CPC H02J 50/60 (2016.02) [H02J 50/402 (2020.01); H02J 50/80 (2016.02); H02J 50/12 (2016.02)] 22 Claims
OG exemplary drawing
 
1. A method for foreign object detection (FOD) in a wireless power transfer (WPT) system, comprising:
initializing an FOD assessment unit prior to or as part of an idle phase in response to a user input to turn on a Power Transmitter, wherein initializing the FOD assessment unit includes setting an FOD flag to a first value to represent that an initial idle phase foreign object detection assessment has not yet been performed; and
indicating an FOD fault status if the Power Transmitter transitions from the idle phase to a different operating phase when the FOD flag is set to the first value.