{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9656556","patent":{"patent_number":"US-9656556","title":"Capacitor discharging during deactivation of electric vehicle drive system","assignee":null,"inventors":[],"filing_date":"2014-01-22T00:00:00.000Z","publication_date":"2017-05-23T00:00:00.000Z","cpc_codes":["H02M"],"num_claims":14,"abstract":"A drive system for an electric vehicle includes an input capacitor selectably coupled to a DC power source (e.g., battery) by a contactor. A variable voltage converter couples the input capacitor to a main link capacitor, and an inverter couples the main capacitor to a machine load (e.g., motor and/or generator). During a normal or emergency shutdown, the contactor is opened. In order to quickly discharge the input capacitor when the contactor opens, A) the converter operates in a boost mode to transfer charge from the input capacitor to the main capacitor until the input capacitor discharges to less than a threshold voltage, B) the converter deactivates to prevent transferring charge from the main capacitor to the input capacitor, and C) the main capacitor can then be discharged through the inverter."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Capacitor discharging during deactivation of electric vehicle drive system","description":"A drive system for an electric vehicle includes an input capacitor selectably coupled to a DC power source (e.g., battery) by a contactor. A variable voltage converter couples the input capacitor to a","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9656556","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-9656556","citation_suggestion":"Patentable. \"Capacitor discharging during deactivation of electric vehicle drive system\" (US-9656556). https://patentable.app/patents/US-9656556","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9656556","json":"https://patentable.app/api/llm-context/US-9656556","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T07:22:16.422Z"}