{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9653987","patent":{"patent_number":"US-9653987","title":"Method for detecting failure of soft start and variable frequency device","assignee":null,"inventors":[],"filing_date":"2016-01-14T00:00:00.000Z","publication_date":"2017-05-16T00:00:00.000Z","cpc_codes":["H02M","H02M","H02M"],"num_claims":9,"abstract":"A method for detecting failure of soft start includes: connecting a variable frequency device to a load; detecting an energy storage unit at a first voltage level; generating an output current to the load; detecting the energy storage unit changed from the first voltage level into a second voltage level; generating a reference voltage value according to the output current and determining whether a voltage difference value between the first voltage level and the second voltage level is larger than the reference voltage value; determining whether a voltage peak-to-peak value of the energy storage unit is smaller than a set value by the controller if the voltage difference value is larger than the reference voltage value; and controlling the inverter circuit to stop outputting the output current to the load if the voltage peak-to-peak value is smaller than the set value."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method for detecting failure of soft start and variable frequency device","description":"A method for detecting failure of soft start includes: connecting a variable frequency device to a load; detecting an energy storage unit at a first voltage level; generating an output current to the ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9653987","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-9653987","citation_suggestion":"Patentable. \"Method for detecting failure of soft start and variable frequency device\" (US-9653987). https://patentable.app/patents/US-9653987","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9653987","json":"https://patentable.app/api/llm-context/US-9653987","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T11:45:48.678Z"}