{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-11271438","patent":{"patent_number":"US-11271438","title":"System for wireless power charging","assignee":null,"inventors":[],"filing_date":"2018-03-07T00:00:00.000Z","publication_date":"2022-03-08T00:00:00.000Z","cpc_codes":["H02J","H02J","H02J","H02J","H02J"],"num_claims":19,"abstract":"According to a first aspect of the present disclosed subject matter, a method for foreign object detection in a system having a relay adapted to inductively transfer power for charging a device and a transmitter having a controller configured to inductively transmit to the relay the power for charging the device, wherein the transmitter and the relay are separated by a medium, wherein the controller is capable of communicating with the device, the method comprising operations by the controller: determining power consumed by the transmitter; determining power loss on the transmitter according to continuous measurements of AC output current; obtaining coupling factor between the transmitter and the relay; determining power loss on the relay based on continuous measurements of AC output current and coupling factor; subtracting from the power consumed by the transmitter the power loss on the transmitter and power loss on the relay; obtaining from the device consumed power of the device; comparing a result of the subtracting to the  consumed power of the device; determining foreign object presence."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"System for wireless power charging","description":"According to a first aspect of the present disclosed subject matter, a method for foreign object detection in a system having a relay adapted to inductively transfer power for charging a device and a ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-11271438","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-11271438","citation_suggestion":"Patentable. \"System for wireless power charging\" (US-11271438). https://patentable.app/patents/US-11271438","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-11271438","json":"https://patentable.app/api/llm-context/US-11271438","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T16:21:49.011Z"}