{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-11303162","patent":{"patent_number":"US-11303162","title":"Foreign object detection in wireless power transfer by asymmetry detection","assignee":null,"inventors":[],"filing_date":"2020-02-18T00:00:00.000Z","publication_date":"2022-04-12T00:00:00.000Z","cpc_codes":["H02J","H02J","H02J"],"num_claims":19,"abstract":"In one embodiment, a wireless power transfer system comprises a transmitter coil structure comprising a first transmitter coil, and a second transmitter coil coupled to the first transmitter coil in such a way that when a first current flows in the first transmitter coil in a first spatial direction the first current flows in the second transmitter coil in a second spatial direction different from the first spatial direction, a foreign object sensor coil structure comprising a first sensor coil having a central axis in common with the first transmitter coil, and a second sensor coil coupled in series to the first sensor coil, the second sensor coil having a central axis in common with the second transmitter coil, the first sensor coil coupled to the second sensor coil in such a way that when a first voltage induced in the first sensor coil has a first polarity a second voltage induced in the second sensor coil has a second polarity different from the first polarity, a voltage detector coupled to the foreign object sensor coil structure, the voltage detector configured to detect a net voltage across the foreign object sensor coil structure, and a controller configured to receive the net voltage and determine a presence or absence of a foreign object based on a magnitude of the net voltage."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Foreign object detection in wireless power transfer by asymmetry detection","description":"In one embodiment, a wireless power transfer system comprises a transmitter coil structure comprising a first transmitter coil, and a second transmitter coil coupled to the first transmitter coil in s","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-11303162","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-11303162","citation_suggestion":"Patentable. \"Foreign object detection in wireless power transfer by asymmetry detection\" (US-11303162). https://patentable.app/patents/US-11303162","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-11303162","json":"https://patentable.app/api/llm-context/US-11303162","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T18:36:01.720Z"}