{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9755549","patent":{"patent_number":"US-9755549","title":"Three level neutral point clamped converter with improved voltage balancing","assignee":null,"inventors":[],"filing_date":"2016-01-29T00:00:00.000Z","publication_date":"2017-09-05T00:00:00.000Z","cpc_codes":["H02M","H02M","H02M","H02M"],"num_claims":18,"abstract":"An NPC converter is controlled by estimating current flow during the short vector periods of a space vector modulation drive signal. The current estimation is used to close a first order inner current regulator loop that steers current to either the upper capacitor or the lower capacitor of a DC link. An outer voltage regulator measures the voltage imbalance across the capacitors and drives the inner current loop. By managing the associated duty cycle of each vector a bias current is formed that balances the capacitor voltages."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Three level neutral point clamped converter with improved voltage balancing","description":"An NPC converter is controlled by estimating current flow during the short vector periods of a space vector modulation drive signal. The current estimation is used to close a first order inner current","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9755549","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-9755549","citation_suggestion":"Patentable. \"Three level neutral point clamped converter with improved voltage balancing\" (US-9755549). https://patentable.app/patents/US-9755549","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9755549","json":"https://patentable.app/api/llm-context/US-9755549","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T07:42:40.338Z"}