{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-11971437","patent":{"patent_number":"US-11971437","title":"Grid voltage phase detector","assignee":null,"inventors":[],"filing_date":"2020-05-25T00:00:00.000Z","publication_date":"2024-04-30T00:00:00.000Z","cpc_codes":["H02J"],"num_claims":5,"abstract":"A grid voltage phase detector includes: a d-q transformation unit for receiving a three-phase signal and producing a signal on d axis and a signal on q axis; a phase signal producing unit for producing a signal for phase synchronization of grid voltage from the signal on d axis and the signal on q axis; and a PR filtering unit, with a first filter having no change in magnitude and phase at a rated frequency, a second filter introducing 90° phase lead at a rated frequency, a third filter introducing 90° phase lag, and a fourth filter having no change in magnitude and phase at a rated frequency, for removing unbalanced components and harmonic components from the signal on d axis and the signal on q axis produced by the d-q transformation unit and providing the signals to the phase signal producing unit."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Grid voltage phase detector","description":"A grid voltage phase detector includes: a d-q transformation unit for receiving a three-phase signal and producing a signal on d axis and a signal on q axis; a phase signal producing unit for producin","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-11971437","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-11971437","citation_suggestion":"Patentable. \"Grid voltage phase detector\" (US-11971437). https://patentable.app/patents/US-11971437","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-11971437","json":"https://patentable.app/api/llm-context/US-11971437","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T03:12:43.401Z"}