{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-11515731","patent":{"patent_number":"US-11515731","title":"Contactless power transmission system for transmitting power from power transmitter apparatus to power receiver apparatus, and detecting foreign object","assignee":null,"inventors":[],"filing_date":"2019-11-28T00:00:00.000Z","publication_date":"2022-11-29T00:00:00.000Z","cpc_codes":["H02J","H02J","H02J","H02J"],"num_claims":6,"abstract":"A first detector detects a value of a current or voltage generated by an auxiliary coil. A second detector detects a value of a current flowing through a power transmitting coil. A coupling coefficient estimator estimates a first coupling coefficient between the power transmitting coil and a power receiving coil, based on the value of the current or voltage generated by the auxiliary coil, and estimates a second coupling coefficient between the power transmitting coil and the power receiving coil, based on the value of the current flowing through the power transmitting coil. A control circuit controls a power supply circuit to stop power transmission to a power receiver apparatus when a difference between the coupling coefficients is greater than a threshold."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Contactless power transmission system for transmitting power from power transmitter apparatus to power receiver apparatus, and detecting foreign object","description":"A first detector detects a value of a current or voltage generated by an auxiliary coil. A second detector detects a value of a current flowing through a power transmitting coil. A coupling coefficien","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-11515731","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-11515731","citation_suggestion":"Patentable. \"Contactless power transmission system for transmitting power from power transmitter apparatus to power receiver apparatus, and detecting foreign object\" (US-11515731). https://patentable.app/patents/US-11515731","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-11515731","json":"https://patentable.app/api/llm-context/US-11515731","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T23:31:21.556Z"}