{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9595864","patent":{"patent_number":"US-9595864","title":"Method and apparatus for balancing voltages of multi-level inverter DC link","assignee":null,"inventors":[],"filing_date":"2014-09-05T00:00:00.000Z","publication_date":"2017-03-14T00:00:00.000Z","cpc_codes":["H02M","H02M","H02M"],"num_claims":18,"abstract":"A method is provided for balancing voltages of a DC link of a multi-level inverter, where the DC link is divided into two halves by a neutral point connection. The method includes injecting a periodic common-mode voltage injection signal to a common-mode voltage reference and a periodic power injection signal to a power reference of the inverter. The power injection signal has the same frequency as the common-mode voltage injection signal. A phase shift between the common-mode voltage injection signal and the power injection signal is constant. The amplitude of at least one of the common-mode voltage injection signal and the power injection signal is controlled on the basis of a difference between voltages over the two halves of the DC link. An apparatus is also provided for implementing the method."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method and apparatus for balancing voltages of multi-level inverter DC link","description":"A method is provided for balancing voltages of a DC link of a multi-level inverter, where the DC link is divided into two halves by a neutral point connection. The method includes injecting a periodic","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9595864","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-9595864","citation_suggestion":"Patentable. \"Method and apparatus for balancing voltages of multi-level inverter DC link\" (US-9595864). https://patentable.app/patents/US-9595864","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9595864","json":"https://patentable.app/api/llm-context/US-9595864","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T11:20:43.849Z"}