{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9621103","patent":{"patent_number":"US-9621103","title":"Circulating current and oscillating current suppressing method and parallel inverter driver system","assignee":null,"inventors":[],"filing_date":"2015-12-15T00:00:00.000Z","publication_date":"2017-04-11T00:00:00.000Z","cpc_codes":["H02M","H02M","H02M"],"num_claims":10,"abstract":"A circulating current and oscillating current suppressing method and parallel inverter driver system are disclosed. Each inverter driver outputs a suppressing three-phase current to a motor and has an entity inductance device and a virtual inductance device. The virtual inductance device receives and sums the suppressing three-phase current of the inverter drivers, and generates a compensated three-phase current according to the suppressing three-phase currents, an impedance of the motor and an ideal impedance value generated by a virtual inductance unit and the entity inductance device. Consequently, the oscillating current of the transition three-phase current outputted from a switch device of the inverter driver can be reduced. In addition, the circulating current suppressing device generates a corrected three-phase voltage command according to a zero-sequence current and/or the circulating current quantity of the parallel inverter driver system, thereby suppressing the zero-sequence current and the circulating current of the parallel inverter driver system."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Circulating current and oscillating current suppressing method and parallel inverter driver system","description":"A circulating current and oscillating current suppressing method and parallel inverter driver system are disclosed. Each inverter driver outputs a suppressing three-phase current to a motor and has an","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9621103","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-9621103","citation_suggestion":"Patentable. \"Circulating current and oscillating current suppressing method and parallel inverter driver system\" (US-9621103). https://patentable.app/patents/US-9621103","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9621103","json":"https://patentable.app/api/llm-context/US-9621103","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T09:33:01.178Z"}