{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9735696","patent":{"patent_number":"US-9735696","title":"Filter capacitor degradation and calibration","assignee":null,"inventors":[],"filing_date":"2015-11-25T00:00:00.000Z","publication_date":"2017-08-15T00:00:00.000Z","cpc_codes":["H02M","H02M","H02M","H02M","H02M","H02M"],"num_claims":17,"abstract":"Methods and power conversion systems in which a capacitor degradation detection system includes an adjustable gain amplifier circuit is calibrated by automatic adjustment of at least one amplifier gain to accommodate current and voltage levels of a particular filter circuit in a first mode. Capacitance values of filter capacitors are calculated according to amplified current signals and compared with an acceptable tolerance range to selectively identify a filter capacitor fault or to store calculated capacitance values as base values in an electronic memory in the first mode. During operation in a second mode with the rectifier and inverter on, the adjusted amplifier gain is used to amplify current sensor signals and/or voltage signals, and capacitance values of the filter capacitors are used to selectively identify capacitor degradation."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Filter capacitor degradation and calibration","description":"Methods and power conversion systems in which a capacitor degradation detection system includes an adjustable gain amplifier circuit is calibrated by automatic adjustment of at least one amplifier gai","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9735696","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-9735696","citation_suggestion":"Patentable. \"Filter capacitor degradation and calibration\" (US-9735696). https://patentable.app/patents/US-9735696","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9735696","json":"https://patentable.app/api/llm-context/US-9735696","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T10:14:41.625Z"}